基于JAVA的学生成绩管理系统源代码
java script成绩判定代码
java script成绩判定代码
以下是一个简单的JavaScript 示例代码，用于根据成绩判定学生的等级。
代码中使用了条件语句（if-else语句）来根据分数范围判断学生的等级，并在控制台输出相应的消息。
```javascript
// 获取学生的成绩
var score = prompt("请输入学生的成绩:");
// 将输入的字符串转换为数字
score = parseFloat(score);
// 判断学生的等级
if (isNaN(score)) {
console.log("请输入有效的成绩！");
} else if (score >= 90) {
console.log("优秀");
} else if (score >= 80) {
console.log("良好");
} else if (score >= 70) {
console.log("中等");
} else if (score >= 60) {
console.log("及格");
} else {
console.log("不及格");
}
```
这个代码首先通过`prompt` 函数获取用户输入的成绩，然后使用`parseFloat` 将输入的字符串转换为数字。
接着，使用条件语句根据成绩的范围判断学生的等级，并在控制台输出相应的消息。
请注意，这只是一个简单的示例，实际应用中可能需要更多的条件判断，也可以根据具体需求进行修改和扩展。
Java学生成绩查询系统
Chap 2实践2-1class Ex2_1{public static void main(String[] args) {float sum=0.0f,count=1.0f;for(int i=1;i<=20;++i){count=1.0f;for(int j=1;j<=i;++j)count*=j;sum+=count;}System.out.println("1+2!+3!+...+20!的值为："+sum);}}实践2-2public class Ex2_2{public static void main(String[] args) {System.out.println("** 菲波拉挈数列的前20个数为：**");long f1 = 1, f2 = 1;for (int i = 1; i <= 10; i ++) {System.out.print(f1 + " " + f2 + " ");if (i % 2 == 0) {System.out.println();}f1 = f1 + f2;f2 = f2 + f1;}}}Chap 3实践3-1public class Student{ static String name="张三";static int age;public Student(){age=18;}public static void main(String args[]){System.out.println("姓名："+name+",年龄："+age);}}实践3-2class People{String name;People(String name){=name ; //对成员变量name 初始化}}class Student extends People{String stuID;Student(String name,String stuID){super(name) ; //对继承自父类的成员变量name初始化this.stuID=stuID ; //对成员变量stuID 初始化}}public class PeopleDemo{public static void main(String arg[]) {Student stu=new Student("张三","20080601") ; //定义对象System.out.println(+" "+stu.stuID) ; //输出对象的姓名和学号}}实践4-1public class Ex4_1 {String str;public Ex4_1(String str) {this.str = str;}int getlength(){return(str.length());}public static void main(String[] args) {Ex4_1 test = new Ex4_1("Hello");System.out.println("字符串是:"+test.str+" 长度为："+test.getlength());}}实践4-2import java.util.*;import java.io.*;public class Ex4_2{public static void main(String[] args) {String str1 = new String();String str2 = new String();char ch;Scanner reader= new Scanner(System.in);System.out.println("输入字符串：");str1=reader.next(); //输入字符串System.out.println("输入要删除的字符：");str2=reader.next(); //输入穿要删除的字符，以字符串的形式输入ch=str2.charAt(0); //将字符串转换为字符str2=str1.replace(ch,' '); //用空格替代指定字符System.out.println("删除字符后的字符串"+str2);}}实践5-1public class Ex5_1{public static void main(String[] args) {try {int num[] = new int [10];System.out.println("num[10] is " + num[10]);}catch (Exception ex){System.out.println("Exception");}catch (RuntimeException ex){System.out.println("RuntimeException");}catch (ArithmeticException ex){System.out.println("ArithmeticException");}}}实践5-2public class Ex5_2{static double cal(double a, double b)throws IllegalArgumentException{ double value;if ( b == 0 ){ // 抛出IllegalArgumentException异常throw new IllegalArgumentException("除数不能为0");} else {value = a/b;if ( value < 0 ){ // 抛出IllegalArgumentException异常throw new IllegalArgumentException("运算结果小于0");}}return value;}public static void main(String[] args){ double result;try{ double a = Double.parseDouble(args[0]);double b = Double.parseDouble(args[1]);result = cal(a, b);System.out.println("运算结果是: " + result);}catch( IllegalArgumentException e ){ // 处理llegalArgumentException异常System.out.println("异常说明: "+e.getMessage());}}}Chap 6实践6-1import javax.swing.JFrame;import javax.swing.JLabel;import java.awt.Font;public class ex6_1 {public static void main(String[] args){JFrame frame=new JFrame();JLabel label1=new JLabel("JA V A Programming");Font font1=label1.getFont();font1=new Font("Courier", font1.getStyle(), 20); label1.setFont(font1);frame.getContentPane().add(label1);frame.pack();frame.setVisible(true);}}实践6-2import javax.swing.*;public class ex6_2 extends JFrame {public ex6_2(){super("第一个窗体");setDefaultCloseOperation(DISPOSE_ON_CLOSE);setSize(300, 150);setLocationRelativeTo(null);setVisible(true);}public static void main(String [] args){new ex6_2();}}Chap 7实践7-1import javax.swing.*;import java.awt.*;public class ex7_1 extends JFrame{ex7_1(){super("程序调试");setLayout(new FlowLayout());JButton jbtn1=new JButton("确定");JButton jbtn2=new JButton("取消");this.getContentPane().add(jbtn1);this.getContentPane().add(jbtn2);this.setVisible(true);this.setSize(300,150);}public static void main( String args[]) {new ex7_1 ();}}实践7-2import javax.swing.*;import java.awt.*;public class Ex7_2 extends JFrame{Panel pan0,pan1,pan2,pan3,pan4,pan5,pan6,pan7;Panel[] pan;String[] numStr={"1","2 ABC","3 DEF","4 GHI","5 JKL","6 MNO","7 PQRS","8 TUV","9 WXYZ","*","0","#"};Ex7_2(){super("手机键盘界面");pan=new Panel[8];for(int j=0;j<8;j++){pan[j]=new Panel();}ImageIcon icon=new ImageIcon("JM1.jpg");JLabel jlab1=new JLabel(icon,SwingConstants.CENTER);pan[5].add(jlab1);pan[0].setLayout(new GridLayout(4,3));for(int i=0;i<numStr.length;i++){pan[0].add(new JButton(numStr[i]));}pan[1].setLayout(new GridLayout(2,1));pan[1].add(new JButton("确定"));pan[1].add(new JButton("Call"));pan[2].setLayout(new GridLayout(2,1));pan[2].add(new JButton("取消"));pan[2].add(new JButton("ON/OFF"));pan[7].setLayout(new BorderLayout());pan[7].add("North",new JButton("上"));pan[7].add("South",new JButton("下"));pan[7].add("East",new JButton("右"));pan[7].add("West",new JButton("左"));pan[3].setLayout(new BorderLayout());pan[3].add(pan[7]);pan[4].setLayout(new GridLayout(1,3));pan[4].add(pan[1]);pan[4].add(pan[3]);pan[4].add(pan[2]);pan[6].setLayout(new GridLayout(3,1));pan[6].add(pan[5]);pan[6].add(pan[4]);pan[6].add(pan[0]);getContentPane().add(pan[6]);setVisible(true);setResizable(false);setLocation(400,150);pack();}public static void main(String[] args){new Ex7_2();}}Chap 8实践8-1import java.awt.event.*;import javax.swing.*;import java.awt.*;public class Ex8_1 extends JFrame implements WindowListener{ public Ex8_1(){Container con=this.getContentPane();con.setLayout(new FlowLayout());setBounds(0,0,200,200);setVisible(true);addWindowListener(this);}public static void main(String args[]){new Ex8_1();}public void windowClosing(WindowEvent e){System.out.println("The window closing");System.exit(0);}public void windowClosed(WindowEvent e){}public void windowOpened(WindowEvent e){System.out.println("window opened");}public void windowIconified(WindowEvent e){}public void windowDeiconified(WindowEvent e){}public void windowDeactivated(WindowEvent e) {System.out.println("The window deactived");}public void windowActivated(WindowEvent e){System.out.println("The window Activated");}}实践8-2import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Ex8_2 extends JFrame implements ActionListener {static Ex8_2 frm=new Ex8_2();static JButton btn1=new JButton("Yellow");static JButton btn2=new JButton("Green");public static void main(String args[]) {btn1.addActionListener(frm); // 把事件监听者frm向btn1注册btn2.addActionListener(frm); // 把事件聆听者frm向btn2注册frm.setTitle("Action Event");frm.setLayout(new FlowLayout(FlowLayout.CENTER));frm.setSize(200,150);frm.getContentPane().add(btn1);frm.getContentPane().add(btn2);frm.setVisible(true);}public void actionPerformed(ActionEvent e) {JButton btn=(JButton) e.getSource(); // 取得事件源对象if(btn==btn1) // 如果是按下btn1按钮frm.getContentPane().setBackground(Color.yellow);else if(btn==btn2) // 如果是按下btn2按钮frm.getContentPane().setBackground(Color.green);}}Chap 9实践9-1import javax.swing.*;import java.awt.*;import javax.swing.event.*;public class Ex9_1 extends JFrame implements ListSelectionListener{ String pro[] = {"软件专业", "网络专业", "动漫专业"};JPanel p1;JComboBox courseCombo;JList proList;Ex9_1(){proList = new JList(pro);proList.addListSelectionListener(this);courseCombo = new JComboBox();p1 = new JPanel();add(p1);p1.add(proList);p1.add(courseCombo);add(p1);setSize(400,200);setVisible(true);}public void valueChanged(ListSelectionEvent e){Object obj = e.getSource();if(obj==proList){courseCombo.removeAllItems();int nIndex = proList.getSelectedIndex();switch(nIndex ){case 0: courseCombo.addItem ("Java程序设计") ;courseCombo.addItem ("J2ee项目开发") ;break;case 1: courseCombo.addItem ("网络基本原理") ;courseCombo.addItem ("局域网技术与组网工程") ;courseCombo.addItem ("网络操作系统") ;break;case 2: courseCombo.addItem ("动漫造型") ;courseCombo.addItem ("漫画制作") ;break;}}}public static void main(String args[]){new Ex9_1();}}实践9-2import javax.swing.*;import java.awt.*;import java.awt.event.*;public class Ex9_2 extends JFrame implements ItemListener{JRadioButton rad1=new JRadioButton("说法正确",false);JRadioButton rad2=new JRadioButton ("说法错误",false);ButtonGroup btg=new ButtonGroup ();JTextArea ta=new JTextArea(2,10);JTextField tf=new JTextField(4);JLabel lb=new JLabel("你的选择:");JPanel jp=new JPanel();String text="BoxLayout是由Swing 提供的布局管理器，功能上同GridBagLayout 一样强大，而且更加易用。
学生信息管理系统java课程设计(含源代码)
JAVA 程序设计 课程设计陈述宇文皓月课 题: 学生信息管理系统 姓 名： 学 号： 同组姓名： 专业班级： 指导教师： 设计时间：目 录1、需要实现的功能32、设计目的3 1、功能模块划分32、数据库结构描述43、系统详细设计文档64、各个模块的实现方法描述95、测试数据及期望结果11一、系统描述1、需求实现的功能1.1、录入学生基本信息的功能学生基本信息主要包含：学号、姓名、年龄、出生地、专业、班级总学分，在拔出时，如果数据库已经存在该学号，则不克不及再拔出该学号。
1.2、修改学生基本信息的功能在管理员模式下，只要在表格中选中某个学生，就可以对该学生信息进行修改。
评阅意见：评定成绩：指导老师签名：年 月 日1.3、查询学生基本信息的功能可使用“姓名”对已存有的学生资料进行查询。
1.4、删除学生基本信息的功能在管理员模式下，只要选择表格中的某个学生，就可以删除该学生。
1.5、用户登陆用分歧的登录权限可以进入分歧的后台界面，从而实现权限操纵。
1.6、用户登陆信息设置可以修改用户登陆密码2、设计目的学生信息管理系统是一个教育单位不成缺少的部分。
一个功能齐全、简单易用的信息管理系统不单能有效地减轻学校相关工作人员的工作负担，它的内容对于学校的决策者和管理者来说都至关重要。
所以学生信息管理系统应该能够为用户提供充足的信息和快捷的查询手段。
但一直以来人们使用传统人工的方式管理文件档案、统计和查询数据，这种管理方式存在着许多缺点，如：效率低、保密性差、人工的大量浪费；另外时间一长，将发生大量的文件和数据，这对于查找、更新和维护都带来了很多困难。
随着科学技术的不竭提高，计算机科学日渐成熟，其强大的功能已为人们深刻认识，它已进入人类社会的各个领域并发挥着越来越重要的作用。
作为计算机应用的一部分，使用计算机对学校的各类信息进行管理，具有手工管理无法比较的优点。
例如：检索迅速、查询方便、效率高、可靠性好、存储量大、保密性好、寿命长、成本低等。
java学生管理系统大作业代码
java学生管理系统大作业代码Java学生管理系统是一个基于Java语言开发的学生信息管理系统，用于方便学校教务人员进行学生信息的管理和查询。
以下是该系统的代码实现。
1. 登录界面代码实现该界面是用户登录的入口，用户需要输入用户名和密码才能进入系统。
```javaimport javax.swing.*;import java.awt.*;import java.awt.event.*;public class Login extends JFrame implements ActionListener {JLabel lb1, lb2, lb3;JTextField txtName;JPasswordField txtPwd;JButton btnOK, btnCancel;String userName = "admin";// 默认用户名String password = "123456";// 默认密码public Login() {setTitle("学生信息管理系统登录");// 设置窗体标题setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 设置窗体关闭方式setSize(350, 200);// 设置窗体大小setLocationRelativeTo(null);// 设置居中显示setLayout(new BorderLayout());JPanel pNorth = new JPanel();lb1 = new JLabel("欢迎使用学生信息管理系统", JLabel.CENTER); lb1.setFont(new Font("微软雅黑", Font.BOLD, 20));pNorth.add(lb1);add(pNorth, BorderLayout.NORTH);JPanel pCenter = new JPanel();pCenter.setLayout(new GridLayout(3, 2));lb2 = new JLabel("用户名:", JLabel.RIGHT);pCenter.add(lb2);txtName = new JTextField(20);pCenter.add(txtName);lb3 = new JLabel("密码:", JLabel.RIGHT);pCenter.add(lb3);txtPwd = new JPasswordField(20);txtPwd.setEchoChar('*');// 设置密码框的回显字符pCenter.add(txtPwd);btnOK = new JButton("登录");pCenter.add(btnOK);btnCancel = new JButton("取消");pCenter.add(btnCancel);add(pCenter, BorderLayout.CENTER);btnOK.addActionListener(this);btnCancel.addActionListener(this);setVisible(true);// 显示窗体}public void actionPerformed(ActionEvent e) {if (e.getSource() == btnOK) {String name = txtName.getText();// 获取用户名String password = new String(txtPwd.getPassword());// 获取密码 if (name.equals(userName) && password.equals(password)) {setVisible(false);new MainFrame();} else {JOptionPane.showMessageDialog(Login.this, "用户名或密码错误！", "登录失败", JOptionPane.ERROR_MESSAGE);}} else if (e.getSource() == btnCancel) {txtName.setText("");txtPwd.setText("");}}public static void main(String[] args) {new Login();}}```2. 主界面代码实现该界面是系统的主界面，包含了菜单栏、工具栏和表格显示区域。
学生信息管理系统源代码(java)
目录1.Client.java (2)2.LoginGUI.java (2)3.AdminGUI.java (6)4.StudentGUI.java (14)5.Select.java (17)6.UpdateAndInsert.java (24)7.Delete.java (27)8.Student.java (29)9.Administrator.java (31)1.Client.java/*程序入口*/package ms;public class Client{public static void main(String[] args){LoginGUI lg=new LoginGUI();lg.login();}}2.LoginGUI.java/*登陆主窗口*/package ms;import java.awt.BorderLayout;import java.awt.Choice;import java.awt.GridLayout;import java.awt.TextField;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;public class LoginGUI{JFrame log=null; //登陆主窗口JPanel jPanel1=null; //用于存放用户名、密码、登录方式标签JPanel jPanel2=null; //用于存放用户名、密码输入框和登录方式选择框JPanel jPanel3=null; //用于存放登陆、退出按钮JLabel jLabel1=null; //用于存放用户名标签JLabel jLabel2=null; //用于存放密码标签JLabel jLabel3=null; //用于存放登录方式标签JLabel jLabel4=null; //学生管理系统登陆标签TextField t1=null; //用于存放用户名输入TextField t2=null; //用于存放密码输入Choice c=null; //用于存放登录方式选择JButton jB1=null; //登陆按钮JButton jB2=null; //退出按钮String UserName=null; //存放用户输入的用户名String UserPassword=null; //存放用户输入的密码int UserLimit=-1; //存放用户选择登陆权限public LoginGUI(){super();this.log = new JFrame("学生学籍管理系统");this.jPanel1=new JPanel();this.jPanel2=new JPanel();this.jPanel3=new JPanel();jLabel1=new JLabel("用户名");jLabel2=new JLabel("密码");jLabel3=new JLabel("登录方式");jLabel4=new JLabel(new ImageIcon("image/login.jpg"));t1=new TextField();t2=new TextField();c=new Choice(); //创建一个登录方式下拉选择框c.add("学生登陆");c.add("管理员登陆");jB1=new JButton("登陆"); //创建登陆按钮jB2=new JButton("退出"); //创建退出按钮}public void login(){BorderLayout border=new BorderLayout();border.setVgap(15);border.setHgap(10);log.setLayout(border); //设置登陆主窗口布局管理器为BorderLayoutlog.add(jPanel1, BorderLayout.WEST);log.add(jPanel2, BorderLayout.CENTER);log.add(jPanel3, BorderLayout.SOUTH);log.add(jLabel4,BorderLayout.NORTH);jPanel1.setLayout(new GridLayout(3,1,30,20)); //3行1列jPanel2.setLayout(new GridLayout(3,1,30,20));jPanel3.setLayout(new GridLayout(1,2,10,30));jPanel1.add(jLabel1); //添加三个标签用户名、密码、登陆方式jPanel1.add(jLabel2);jPanel1.add(jLabel3);jPanel2.add(t1); //添加用户名、密码输入文本框登陆方式选择框jPanel2.add(t2);jPanel2.add(c);jPanel3.add(jB1); //添加两个按钮jPanel3.add(jB2);jB1.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){erName=LoginGUI.this.t1.getText();erPassword=LoginGUI.this.t2.getText();erLimit=LoginGUI.this.c.getSelectedIndex();if(erLimit==0){StudentGUI ll=new StudentGUI(LoginGUI.this.log,erName);Select sel=new Select();sel.setStudentList();for(int i=0;i<sel.getStudentAllId().size();i++){if(sel.getStudentAllId().get(i).toString().equals(erNa me)&&sel.getStudentAllPassword().get(i).equals(erPass word)){log.setVisible(false);ll.studentGo();}else if(i==sel.getStudentAllId().size()-1){JOptionPane.showMessageDialog(LoginGUI.this.log,"用户名密码错误");}}}else if(erLimit==1){AdminGUI admin=new AdminGUI(LoginGUI.this.log);Select sel=new Select();sel.setAdminList();for(int i=0;i<sel.getAdminAllId().size();i++){if(sel.getAdminAllId().get(i).toString().equals(erNam e)&&sel.getAdminAllPassword().get(i).equals(erPasswor d)){log.setVisible(false);admin.adminGo();}else if(i==sel.getAdminAllId().size()-1){JOptionPane.showMessageDialog(LoginGUI.this.log,"用户名密码错误");}}}}});jB2.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){System.exit(0);}});log.setSize(240,260);log.setLocationRelativeTo(null);log.setResizable(false);log.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e){System.exit(0);}});log.setVisible(true);}}3.AdminGUI.java/*管理员登陆图形界面*/package ms;import java.awt.BorderLayout;import java.awt.GridLayout;import java.awt.TextArea;import java.awt.TextField;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;public class AdminGUI{JDialog log=null;//管理员登陆主窗口JPanel jp1=null;//用于存放管理员登陆标签和jp5JPanel jp2=null;//用于存放查询修改增加删除按钮JPanel jp3=null;//用于存放信息块和jp5JPanel jp4=null;//用于存放修改插入删除按钮JPanel jp5=null;//用于存放请输入学号文本框JLabel jadminLog=null; //管理员登陆标签JLabel jLabel=null; //请输入学号标签TextField tf=null; //请输入学号文本框JButton jb1=null;//查询按钮JButton jb2=null;//修改按钮JButton jb3=null;//增加按钮JButton jb4=null;//删除按钮JButton jb5=null; //列出全部学生信息TextArea ta=null;//信息文本框JLabel jl=null; //用于站位String id=null; //用于保存用户输入查询学号TextField[] jtf = new T extField[9] ;JDialog jdialog=null;public AdminGUI(JFrame log){super();this.log = new JDialog(log,"管理员登陆",true);jp1=new JPanel();jp2=new JPanel();jp3=new JPanel();jp4=new JPanel();jp5=new JPanel();jadminLog=new JLabel(new ImageIcon("image/admin.jpg"));jLabel=new JLabel("请输入学号");tf=new TextField();jb1=new JButton("查询");jb2=new JButton("修改");jb3=new JButton("增加");jb4=new JButton("删除");jb5=new JButton("列出全部学生信息");ta=new TextArea("点击查询按钮将在此显示查询信息");jl=new JLabel();}public void adminGo(){BorderLayout bl=new BorderLayout();bl.setVgap(30);bl.setHgap(30);log.setLayout(bl);log.add(jp1,BorderLayout.NORTH);BorderLayout bl1=new BorderLayout();bl1.setVgap(20);jp1.setLayout(bl1);jp1.add(jadminLog,BorderLayout.CENTER);jp5.setLayout(new GridLayout(1,2,200,200));jp5.add(jLabel);jp5.add(tf);log.add(jp2,BorderLayout.WEST);jp2.setLayout(new GridLayout(2,1,200,300));jp2.add(jb1);jp2.add(jb5);log.add(jp3,BorderLayout.CENTER);jp3.setLayout(new BorderLayout(10, 10));jp3.add(jp5,BorderLayout.NORTH);jp3.add(ta);jp5.setLayout(new GridLayout(1,5,10,10));jp5.add(jLabel);jp5.add(tf);log.add(jp4,BorderLayout.SOUTH);jp4.setLayout(new GridLayout(1,3,200,30));jp4.add(jb2);jp4.add(jb3);jp4.add(jb4);log.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e){System.exit(0);}});jb1.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){AdminGUI.this.id=AdminGUI.this.tf.getText();Select sel=new Select();sel.selectStudent(AdminGUI.this.id);if(sel.getStudent()!=null){Student student=sel.getStudent();AdminGUI.this.ta.setText("学号\t\t"+"姓名\t\t"+"性别\t\t"+"出生日期\t\t"+"民族\t\t"+"籍贯\t\t"+"专业\t\t"+"班级\t\t"+"联系电话\t\t"+"密码\t\t");AdminGUI.this.ta.append("\n"+student.getId()+"\t\t"+student.getNa me()+"\t\t"+student.getSex()+"\t\t"+student.getBornDate()+"\t\t"+student.getNationality()+"\t\t"+student.getNationality()+"\t\t"+stu dent.getMaj()+"\t"+student.getCla()+"\t\t"+student.getTelNum()+"\t\t"+student.getPassword()+"\n");}else{AdminGUI.this.ta.setText("查无此人");}}});jb5.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){Select sel=new Select();sel.selectAllStudent();AdminGUI.this.ta.setText("学号\t\t"+"姓名\t\t"+"性别\t\t"+"出生日期\t\t"+"民族\t\t"+"籍贯\t\t"+"专业\t\t"+"班级\t\t"+"联系电话\t\t"+"密码\t\t\n");for(int i=0;i<sel.getAllStudent().size();i++){Student student=sel.getAllStudent().get(i);AdminGUI.this.ta.append(student.getId()+"\t\t"+student.getName() +"\t\t"+student.getSex()+"\t\t"+student.getBornDate()+"\t\t"+student.getNationality()+"\t\t"+student.getHometown()+"\t\t"+st udent.getMaj()+"\t"+student.getCla()+"\t\t"+student.getTelNum()+"\t\t"+student.getPa ssword()+"\n");}}});log.setSize(850,580);log.setLocationRelativeTo(null);log.setResizable(false);jb3.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){jdialog=new JDialog(AdminGUI.this.log);String[] str=new String[]{"姓名","性别","出生日期","民族","籍贯","专业","班级","联系电话","密码"};JLabel[] jlabel=new JLabel[9];for(int i=0;i<9;i++){jlabel[i]=new JLabel(str[i]);jtf[i]=new TextField();}JPanel jpanel1=new JPanel();JPanel jpanel2=new JPanel();JButton jbutton1=new JButton("确定");JButton jbutton2=new JButton("取消");jdialog.setLayout(new BorderLayout());jdialog.add(jpanel1,BorderLayout.CENTER);jdialog.add(jpanel2,BorderLayout.SOUTH);jpanel1.setLayout(new GridLayout(9,2,10,10));for(int i=0;i<9;i++){jpanel1.add(jlabel[i]);jpanel1.add(jtf[i]);}jpanel2.add(jbutton1);jpanel2.add(jbutton2);jbutton1.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){Student student=new Student();student.setName(AdminGUI.this.jtf[0].getText());student.setSex(AdminGUI.this.jtf[1].getText()); student.setBornDate(AdminGUI.this.jtf[2].getText());student.setNationality(AdminGUI.this.jtf[3].getText());student.setHometown(AdminGUI.this.jtf[4].getText());student.setMaj(AdminGUI.this.jtf[5].getText());student.setCla(AdminGUI.this.jtf[6].getText());student.setTelNum(AdminGUI.this.jtf[7].getText()); student.setPassword(AdminGUI.this.jtf[8].getText());UpdateAndInsert up=new UpdateAndInsert();if(up.insertStudent(student)==true){JOptionPane.showMessageDialog(AdminGUI.this.log,"添加成功");}jdialog.dispose();}});jbutton2.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){jdialog.dispose();}});jdialog.setSize(500,400);jdialog.setLocationRelativeTo(null);jdialog.setResizable(false);jdialog.setVisible(true);}});jb4.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){if(new Delete().delete(AdminGUI.this.tf.getText())==true){JOptionPane.showMessageDialog(AdminGUI.this.log,"刪除成功");}elseJOptionPane.showMessageDialog(AdminGUI.this.log,"刪除失敗");}});jb2.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){Select sel=new Select();AdminGUI.this.id=AdminGUI.this.tf.getText();sel.selectStudent(AdminGUI.this.tf.getText());Student student=sel.getStudent();if(student==null){JOptionPane.showMessageDialog(AdminGUI.this.log,"请检查输入的学号");}else{jdialog=new JDialog(AdminGUI.this.log);String[] str=new String[]{"姓名","性别","出生日期","民族","籍贯","专业","班级","联系电话","密码"};JLabel[] jlabel=new JLabel[9];for(int i=0;i<9;i++){jlabel[i]=new JLabel(str[i]);}jtf[0]=new TextField(student.getName());jtf[1]=new TextField(student.getSex());jtf[2]=new TextField(student.getBornDate());jtf[3]=new TextField(student.getNationality());jtf[4]=new TextField(student.getHometown());jtf[5]=new TextField(student.getMaj());jtf[6]=new TextField(student.getCla());jtf[7]=new TextField(student.getTelNum());jtf[8]=new TextField(student.getPassword());JPanel jpanel1=new JPanel();JPanel jpanel2=new JPanel();JButton jbutton1=new JButton("确定");JButton jbutton2=new JButton("取消");jdialog.setLayout(new BorderLayout());jdialog.add(jpanel1,BorderLayout.CENTER);jdialog.add(jpanel2,BorderLayout.SOUTH);jpanel1.setLayout(new GridLayout(9,2,10,10));for(int i=0;i<9;i++){jpanel1.add(jlabel[i]);jpanel1.add(jtf[i]);}jpanel2.add(jbutton1);jpanel2.add(jbutton2);jbutton1.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){Student student=new Student(Integer.parseInt(AdminGUI.this.id), jtf[0].getText(), jtf[1].getText(), jtf[2].getText(), jtf[3].getText(), jtf[4].getText(), jtf[5].getText(), jtf[6].getText(), jtf[7].getText(), jtf[8].getText());UpdateAndInsert up=new UpdateAndInsert();if(up.updateStudent(student)==true){JOptionPane.showMessageDialog(AdminGUI.this.log,"更改成功");;}jdialog.dispose();}});jbutton2.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){jdialog.dispose();}});jdialog.setSize(500,400);jdialog.setLocationRelativeTo(null);jdialog.setResizable(false);jdialog.setVisible(true);}}});log.setVisible(true);}}4.StudentGUI.java/*学生操作图形界面*/package ms;import java.awt.BorderLayout;import java.awt.GridLayout;import java.awt.TextField;import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;public class StudentGUI{JDialog log=null;//学生登入类主窗口JPanel jp1=null;//用于存放登入块JPanel jp2=null;//用于存放信息块JPanel jp3=null;//用于密码存放修改块JPanel jp4=null;//用于存放我的信息按钮JLabel jl1=null;//学生登入标签JLabel jl2=null;//学号标签JLabel jl3=null;//学生姓名标签JLabel jl4=null;//性别标签JLabel jl5=null;//出生日期标签JLabel jl6=null;//民族标签JLabel jl7=null;//籍贯标签JLabel jl8=null;//专业标签JLabel jl9=null;//班级标签JLabel jl10=null;//联系电话标签JLabel jl11=null;//请输入密码标签JButton jb1=null;//我的信息按钮JButton jb2=null;//密码修改按钮TextField t1=null;//学号文本框TextField t2=null;//学生姓名文本框TextField t3=null;//性别文本框TextField t4=null;//出生日期文本框TextField t5=null;//民族文本框TextField t6=null;//籍贯文本框TextField t7=null;//专业文本框TextField t8=null;//班级文本框TextField t9=null;//联系电话文本框TextField t10=null;//密码文本框JPanel jp5=new JPanel();//存放密码输入框String id=null;public StudentGUI(JFrame log,String str){super();this.log = new JDialog(log,"学生登入",true);jp1=new JPanel();jp2=new JPanel();jp3=new JPanel();jp4=new JPanel();jl1=new JLabel(new ImageIcon("image/student.jpg"));jl2=new JLabel("学号:");jl3=new JLabel("学生姓名:");jl4=new JLabel("性别:");jl5=new JLabel("出生日期:");jl6=new JLabel("民族:");jl7=new JLabel("籍贯:");jl8=new JLabel("专业:");jl9=new JLabel("班级:");jl10=new JLabel("联系电话:");jl11=new JLabel("请输入新密码:");jb1=new JButton("我的信息");jb2=new JButton("密码修改");t1=new TextField();t2=new TextField();t3=new TextField();t4=new TextField();t5=new TextField();t6=new TextField();t7=new TextField();t8=new TextField();t9=new TextField();t10=new TextField();this.id=str;}public void studentGo(){BorderLayout bl=new BorderLayout();bl.setHgap(30);bl.setVgap(30);log.setLayout(bl);log.add(jp1,BorderLayout.NORTH);//将登入块信息块密码修改块放入主窗口log.add(jp2,BorderLayout.CENTER);log.add(jp3,BorderLayout.SOUTH);log.add(jp4,BorderLayout.WEST);jp1.add(jl1,BorderLayout.CENTER);jp2.setLayout(new GridLayout(5,2,20,10));jp2.add(jl2);jp2.add(t1);jp2.add(jl3);jp2.add(t2);jp2.add(jl4);jp2.add(t3);jp2.add(jl5);jp2.add(t4);jp2.add(jl6);jp2.add(t5);jp2.add(jl7);jp2.add(t6);jp2.add(jl8);jp2.add(t7);jp2.add(jl9);jp2.add(t8);jp2.add(jl10);jp2.add(t9);jp4.add(jb1);BorderLayout bl1=new BorderLayout();bl1.setHgap(38);jp3.setLayout(bl1);jp3.add(jb2,BorderLayout.WEST);jp3.add(jp5,BorderLayout.CENTER);jp5.setLayout(new GridLayout());jp5.add(jl11);jp5.add(t10);jb1.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){Select sel=new Select();sel.selectStudent(id);Student student=sel.getStudent();t1.setText(new Integer(student.getId()).toString());t2.setText(student.getName());t3.setText(student.getSex());t4.setText(student.getBornDate());t5.setText(student.getNationality());t6.setText(student.getHometown());t7.setText(student.getMaj());t8.setText(student.getCla());t9.setText(student.getTelNum());}});jb2.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent e){String password=StudentGUI.this.t10.getText();UpdateAndInsert up=new UpdateAndInsert();if(up.updatePassword(id, password)==true){JOptionPane.showMessageDialog(StudentGUI.this.log,"修改成功");}}});log.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e){System.exit(0);}});log.setSize(550,420);log.setLocationRelativeTo(null);log.setResizable(false);log.setVisible(true);}}5.Select.java/* 查询类包括查询的各种方法*/package ms;import java.sql.*;import java.util.LinkedList;public class Select{private LinkedList<Integer> studentAllId=null;private LinkedList<String> studentAllPassword=null;private LinkedList<Integer> adminAllId=null;private LinkedList<String> adminAllPassword=null;private Student student=null;private LinkedList<Student> allStudent=null;// 定义MySQL的数据库驱动程序public static final String DBDRIVER = "org.gjt.mm.mysql.Driver" ;// 定义MySQL数据库的连接地址public static final String DBURL = "jdbc:mysql://localhost:3306/studentMS" ;// MySQL数据库的连接用户名public static final String DBUSER = "root" ;// MySQL数据库的连接密码public static final String DBPASS = "systemout" ;public Select(){super();this.studentAllId = new LinkedList<Integer>();this.studentAllPassword = new LinkedList<String>();this.adminAllId = new LinkedList<Integer>();this.adminAllPassword = new LinkedList<String>();this.allStudent = new LinkedList<Student>();}public LinkedList<Integer> getStudentAllId(){return studentAllId;}public LinkedList<String> getStudentAllPassword(){return studentAllPassword;}public LinkedList<Integer> getAdminAllId(){return adminAllId;}public LinkedList<String> getAdminAllPassword(){return adminAllPassword;}public Student getStudent(){return student;}public LinkedList<Student> getAllStudent(){return allStudent;}public void setStudentList() //设置studentAllId 和studentAllPassword{Connection conn = null ; // 数据库连接Statement stmt = null ; // 数据库的操作对象ResultSet rs = null ; // 保存查询结果String sql = "select id,password from student";try{Class.forName(DBDRIVER) ; // 加载驱动程序}catch(ClassNotFoundException e){e.printStackTrace() ;}try{conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS) ;}catch(SQLException e){e.printStackTrace() ;}try{stmt = conn.createStatement() ; //得到stmt对象用于执行sql语句} catch (SQLException e1){e1.printStackTrace();}try{rs = stmt.executeQuery(sql) ;//保存sql查询结果} catch (SQLException e1){e1.printStackTrace();}try{while(rs.next()){studentAllId.add(rs.getInt(1));studentAllPassword.add(rs.getString(2));}} catch (SQLException e1){e1.printStackTrace();}try{rs.close() ;stmt.close() ;conn.close() ; // 数据库关闭}catch(SQLException e){e.printStackTrace() ;}}public void setAdminList(){Connection conn = null ; // 数据库连接Statement stmt = null ; // 数据库的操作对象ResultSet rs = null ; // 保存查询结果String sql = "select id,password from admin";try{Class.forName(DBDRIVER) ; // 加载驱动程序}catch(ClassNotFoundException e){e.printStackTrace() ;}try{conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS) ;}catch(SQLException e){e.printStackTrace() ;}try{stmt = conn.createStatement() ; //得到stmt对象用于执行sql语句} catch (SQLException e1){e1.printStackTrace();}try{rs = stmt.executeQuery(sql) ;//保存sql查询结果} catch (SQLException e1){e1.printStackTrace();}try{while(rs.next()){adminAllId.add(rs.getInt(1));adminAllPassword.add(rs.getString(2));}} catch (SQLException e1){e1.printStackTrace();}try{rs.close() ;stmt.close() ;conn.close() ; // 数据库关闭}catch(SQLException e){e.printStackTrace() ;}}public boolean selectStudent(String str){Connection conn = null ; // 数据库连接PreparedStatement pstmt = null ; // 数据库的操作对象ResultSet rs = null ; // 保存查询结果String sql = "select name,sex,bornDate,nationality,hometown,maj,cla,telNum,password "+ "from student where id=?";try{Class.forName(DBDRIVER) ; // 加载驱动程序}catch(ClassNotFoundException e){e.printStackTrace() ;}try{conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS) ;}catch(SQLException e){e.printStackTrace() ;}try{pstmt = conn.prepareStatement(sql) ; //得到stmt对象用于执行sql语句} catch (SQLException e1){e1.printStackTrace();}try{pstmt.setString(1, str);} catch (SQLException e2){e2.printStackTrace();}try{rs = pstmt.executeQuery() ;//保存sql查询结果} catch (SQLException e1){e1.printStackTrace();}try{while(rs.next()){student=new Student(Integer.parseInt(str),rs.getString(1),rs.getString(2),rs.getString(3),rs.getString(4),rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8),rs.getString(9));}} catch (SQLException e1){e1.printStackTrace();}try{rs.close() ;pstmt.close() ;conn.close() ; // 数据库关闭}catch(SQLException e){e.printStackTrace() ;}if(student !=null){return true;}else{return false;}}public void selectAllStudent(){Connection conn = null ; // 数据库连接PreparedStatement pstmt = null ; // 数据库的操作对象ResultSet rs = null ; // 保存查询结果String sql = "select * "+"from student";try{Class.forName(DBDRIVER) ; // 加载驱动程序}catch(ClassNotFoundException e){e.printStackTrace() ;}try{conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS) ;}catch(SQLException e){e.printStackTrace() ;}try{pstmt = conn.prepareStatement(sql) ; //得到stmt对象用于执行sql语句} catch (SQLException e1){e1.printStackTrace();}try{rs = pstmt.executeQuery() ;//保存sql查询结果} catch (SQLException e1){e1.printStackTrace();}try{while(rs.next()){student=new Student(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8),rs.getString(9),rs.getString(10));allStudent.add(student);}} catch (SQLException e1){e1.printStackTrace();}try{rs.close() ;pstmt.close() ;conn.close() ; // 数据库关闭}catch(SQLException e){e.printStackTrace() ;}}}6.UpdateAndInsert.java/*修改&&插入类定义了修改和插入的所有方法*/package ms;import java.sql.Connection;import java.sql.DriverManager;import java.sql.SQLException;import java.sql.Statement;public class UpdateAndInsert{// 定义MySQL的数据库驱动程序public static final String DBDRIVER = "org.gjt.mm.mysql.Driver" ;// 定义MySQL数据库的连接地址public static final String DBURL = "jdbc:mysql://localhost:3306/studentMS" ;// MySQL数据库的连接用户名public static final String DBUSER = "root" ;// MySQL数据库的连接密码public static final String DBPASS = "systemout" ;public boolean insertStudent (Student student){String name=student.getName();String sex=student.getSex();String bornDate=student.getBornDate();String nationality=student.getNationality();String hometown=student.getHometown();String maj=student.getMaj();String cla=student.getCla();String telNum=student.getTelNum();String password=student.getPassword();Connection conn = null ; // 数据库连接Statement stmt = null ; // 数据库操作try{Class.forName(DBDRIVER) ;} catch (ClassNotFoundException e){// TODO Auto-generated catch blocke.printStackTrace();} // 加载驱动程序String sql = "INSERT INTO student(name,sex,bornDate,nationality,hometown,maj,cla,telNum,passw ord) "+" VALUES('"+name+"','"+sex+"','"+bornDate+"','"+nationality+"','"+hometown+"' ,'"+maj+"','"+cla+"','"+telNum+"','"+password+"')";try{conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS) ;} catch (SQLException e){// TODO Auto-generated catch blocke.printStackTrace();}try{stmt = conn.createStatement() ;} catch (SQLException e){// TODO Auto-generated catch blocke.printStackTrace();} // 实例化Statement对象try{stmt.executeUpdate(sql) ;} catch (SQLException e){// TODO Auto-generated catch blocke.printStackTrace();} // 执行数据库更新操作try{stmt.close() ; // 关闭操作conn.close() ;} catch (SQLException e){// TODO Auto-generated catch blocke.printStackTrace();} // 数据库关闭return true;}public boolean updateStudent(Student student){Select sel=new Select();if(sel.selectStudent(newInteger(student.getId()).toString())==false){return false;}Connection conn = null ; // 数据库连接Statement stmt = null ; // 数据库操作String name=student.getName();String sex=student.getSex();String bornDate=student.getBornDate();String nationality=student.getNationality();String hometown =student.getHometown();String maj=student.getMaj();String cla=student.getCla();String telNum=student.getTelNum();String password=student.getPassword();String sql="UPDATE student SET name='"+name+"',sex='"+sex+"',bornDate='"+bornDate+"',nationality ='"+nationality+"',hometown='"+hometown+"',maj='"+maj+"',cla='"+c la+"',telNum='"+telNum+"',password='"+password+"' WHERE id="+student.getId() ;try{conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS) ;} catch (SQLException e1){// TODO Auto-generated catch blocke1.printStackTrace();}try{stmt = conn.createStatement() ;} catch (SQLException e){// TODO Auto-generated catch blocke.printStackTrace();} // 实例化Statement对象try{stmt.executeUpdate(sql) ;} catch (SQLException e){// TODO Auto-generated catch blocke.printStackTrace();} // 执行数据库更新操作try{stmt.close() ; // 关闭操作conn.close() ; // 数据库关闭} catch (SQLException e){// TODO Auto-generated catch blocke.printStackTrace();}return true;}。
学生成绩管理系统源代码
#include <stdio.h>#include <stdlib.h>#include <string.h>#include <dos.h>#include<ctype.h>#include<conio.h>#include<stddef.h>#include<time.h>#define PRINT1 textcolor(12); cprintf("\r 请按任意键返回主菜单\n\r");textcolor(10); getch();clrscr(); break;int shoudsave=0;struct student /* 学生信息结构体定义*/{char num[10],name[20],cla[4];int score1,score2,score3,total,ave;};typedef struct node{struct student data;struct node *next;}Node,*L;void print1(){cprintf("\r======================================================================= =========");}void print2(){cprintf("\n\r 1.输入学生成绩信息在这里你可以按照提示输入学生的班级，学号,姓名及各科成绩.\n");cprintf("\n\r 2.注销学生成绩信息在这里你可以按照学号或姓名将某名学生的信息从本系统中删除.\n");cprintf("\n\r 3.查询学生成绩信息在这里你可以按照学号或姓名查询某一名学生的信息.\n");cprintf("\n\r 4.修改学生成绩信息在这里你可以按照提示修改某一名学生的学号,姓名及各科成绩.");cprintf("\n\r 5.学生成绩信息排序在这里你可以看到所有学生的各科成绩.\n"); cprintf("\n\r 6.学生成绩信息统计在这里本系统将为你显示所有科目的最高分及最低分所得学生.\n");cprintf("\n\r 7.显示学生成绩信息在这里你可以看到系统中所有学生的信息.\n"); cprintf("\n\r 8.保存学生成绩信息在这里你可以将学生你信息保存到内存中.\n"); cprintf("\n\r 9.帮助学生成绩信息在这里你可以获得帮助信息.\n");cprintf("\n\r 0.退出系统在这里选择是否保存后,你可以安全的退出本系统.\n\n\r ");}void menu(){cprintf("\n\r\xc9\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xc d\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcb\xcd\xcd\xcd\xcd\ xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xc d\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xbb");cprintf("\r\xba 学生信息导入\xba 学生信息处理\xba");cprintf("\r\xba____________________________________\xba___________________________ _______________\xba");cprintf("\r\xba 1-->输入学生成绩信息\xba 6-->学生成绩信息统计\xba");cprintf("\r\xba 2-->注销学生成绩信息\xba 7-->显示学生成绩信息\xba");cprintf("\r\xba 3-->查询学生成绩信息\xba 8-->保存学生成绩信息\xba");cprintf("\r\xba 4-->修改学生成绩信息\xba 9-->帮助学生成绩信息\xba");cprintf("\r\xba 5-->学生成绩信息排序\xba 0-->退出系统\xba");cprintf("\r\xc8\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\ xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xca\xcd\xcd\xcd\xcd\xc d\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\ xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xbc");}void wrong(){cprintf("\n\r输入错误!请验证后重新输入.\n");}void notfind(){cprintf("\n\r该学生信息不存在!请验证后重新输入.\n");}void printc() /* 此函数用于输出中文格式*/{cprintf("\r学号姓名班级英语数学C语言总分平均分\n ");}void printe(Node *p) /* 此函数用于输出英文格式*/{cprintf("\r%-4s%-4s%4s%5d%5d%8d%5d%7d\n\r",p->data.num,p->,p->data.cla,p->dat a.score3,p->data.score2,p->data.score1,p->data.total,p->data.ave);}Node* Locate(L l,char findinfo[],char nameornum[]) /* 该函数用于定位连表中符合要求的接点，并返回该指针*/{Node *r;if(strcmp(nameornum,"num")==0)/* 按学号查询*/{r=l->next;while(r!=NULL){if(strcmp(r->data.num,findinfo)==0)return r;r=r->next;}}else if(strcmp(nameornum,"name")==0) /* 按姓名查询*/{r=l->next;while(r!=NULL){if(strcmp(r->,findinfo)==0)return r;r=r->next;}}return 0;}void input(L l) /* 增加学生*/{Node *p,*r,*s;char num[10];r=l;s=l->next;while(r->next!=NULL)r=r->next;/* 将指针置于最末尾*/while(1){ cprintf("\r如果输入完毕，请按任意键返回主菜单\n");cprintf("\r如果你还想输入，请按y(yes)继续\n\r");scanf("%s",num);if(strcmp(num,"y")==0){ cprintf("请你输入学号:");scanf("%s",num); } else break;while(s){if(strcmp(s->data.num,num)==0){printf("\t学号为'%s'的学生已经存在,若要修改请你选择'4 修改'!\n",num);print1();printc();printe(s);print1();printf("\n");getch();return;}s=s->next;}p=(Node *)malloc(sizeof(Node));strcpy(p->data.num,num);cprintf("\r请你输入姓名:");scanf("%s",p->);getchar();cprintf("\r请你输入班级:");scanf("%s",p->data.cla);getchar();cprintf("\r请你输入c语言成绩(0-100):");scanf("%d",&p->data.score1);getchar();cprintf("\r请你输入数学成绩(0-100):");scanf("%d",&p->data.score2);getchar();cprintf("\r请你输入英语成绩(0-100):");scanf("%d",&p->data.score3);getchar();p->data.total=p->data.score3+p->data.score1+p->data.score2;p->data.ave=p->data.total / 3; /* 信息输入已经完成*/p->next=NULL;r=p;shoudsave=1;}}void query(L l) /* 查询学生信息*/{int select;char findinfo[20];Node *p;if(!l->next){cprintf("\n 没有信息可以查询!\n");return;}cprintf("\n1==>按学号查找\n\r2==>按姓名查找\n\r");scanf("%d",&select);if(select==1) /* 学号*/{cprintf("\r请你输入要查找的学号:");scanf("%s",findinfo);p=Locate(l,findinfo,"num");if(p){cprintf(" 查找结果\n\r");print1();printc();printe(p);print1();}elsenotfind();}else if(select==2) /* 姓名*/{cprintf("\r请你输入要查找的姓名:");scanf("%s",findinfo);p=Locate(l,findinfo,"name");if(p){cprintf(" 查找结果\n\r");print1();printc();print1();}elsenotfind();}elsewrong();}void Delete(L l) /* 删除学生信息*/{int select;Node *p,*r;char findinfo[20];if(!l->next){cprintf("\n 没有信息可以删除!\n");return;}cprintf("\n1==>按学号删除\n\r2==>按姓名删除\n\r");scanf("%d",&select);if(select==1){cprintf("\r请你输入要删除的学号:");scanf("%s",findinfo);p=Locate(l,findinfo,"num");if(p){r=l;while(r->next!=p)r=r->next;r->next=p->next;free(p);cprintf("\n\r该学生已经成功删除!\n");shoudsave=1;}elsenotfind();}else if(select==2){cprintf("\r请你输入要删除的姓名:");scanf("%s",findinfo);p=Locate(l,findinfo,"name");if(p){r=l;while(r->next!=p)r=r->next;r->next=p->next;free(p);cprintf("\n\r该学生已经成功删除!\n");shoudsave=1;}elsenotfind();}else wrong();}void modify(L l) /*修改学生信息*/{Node *p;char findinfo[20];if(!l->next){cprintf("\n\r没有信息可以修改!\n");return;}cprintf("\r请你输入要修改的学生学号:");scanf("%s",findinfo);p=Locate(l,findinfo,"num");if(p){cprintf("\r请你输入新学号(原来是%s):",p->data.num);scanf("%s",p->data.num);cprintf("\r请你输入新姓名(原来是%s):",p->);scanf("%s",p->);getchar();cprintf("\r请你输入新班级(原来是%s):",p->data.cla);scanf("%s",p->data.cla);cprintf("\r请你输入新的c语言成绩(原来是%d分):",p->data.score1);scanf("%d",&p->data.score1);getchar();cprintf("\r请你输入新的数学成绩(原来是%d分):",p->data.score2);scanf("%d",&p->data.score2);getchar();cprintf("\r请你输入新的英语成绩(原来是%d分):",p->data.score3);scanf("%d",&p->data.score3);p->data.total=p->data.score3+p->data.score1+p->data.score2;p->data.ave=p->data.total/3;cprintf("\n\r信息修改成功!\n");shoudsave=1;}elsenotfind();}void display(L l){/*显示全部学生信息*/int count=0;Node *p;p=l->next;if(!p){cprintf("\n\r 没有信息可以显示!\n");return;}cprintf(" 显示结果");print1();printc();while(p){ if(count%5==0) getch();printe(p);p=p->next;count++;}print1();cprintf("\n");}void Statistic(L l) /*统计学生信息*/{Node *pm_max,*pe_max,*pc_max,*pt_max,*pa_max; /* 用于指向分数最高的接点*/ Node *pm_min,*pe_min,*pc_min,*pt_min,*pa_min;Node *r=l->next;if(!r){cprintf("\n\r 没有信息可以统计!\n");return ;}pm_max=pe_max=pc_max=pt_max=pa_max=pm_min=pe_min=pc_min=pt_min=pa_min=r; while(r!=NULL){if(r->data.score1>=pc_max->data.score1)pc_max=r;if(r->data.score1<=pc_min->data.score1)pc_min=r;if(r->data.score2>=pm_max->data.score2)pm_max=r;if(r->data.score2<=pm_min->data.score2)pm_min=r;if(r->data.score3>=pe_max->data.score3)pe_max=r;if(r->data.score3<=pe_min->data.score3)pe_min=r;if(r->data.total>=pt_max->data.total)pt_max=r;if(r->data.total<=pt_min->data.total)pt_min=r;if(r->data.ave>=pa_max->data.ave)pa_max=r;if(r->data.ave<=pa_min->data.ave)pa_min=r;r=r->next;}cprintf("====================================统计结果====================================\n");cprintf("\r总分最高者: %-16s %d分\n",pt_max->,pt_max->data.total); cprintf("\r平均分最高者: %-16s %d分\n",pa_max->,pa_max->data.ave); cprintf("\r英语最高者: %-16s %d分\n",pe_max->,pe_max->data.score3); cprintf("\r数学最高者: %-16s %d分\n",pm_max->,pm_max->data.score2); cprintf("\rc语言最高者: %-16s %d分\n\r",pc_max->,pc_max->data.score1); cprintf("\r总分最低者: %-16s %d分\n",pt_min->,pt_min->data.total); cprintf("\r平均分最低者: %-16s %d分\n",pa_min->,pa_min->data.ave); cprintf("\r英语最低者: %-16s %d分\n",pe_min->,pe_min->data.score3); cprintf("\r数学最低者: %-16s %d分\n",pm_min->,pm_min->data.score2); cprintf("\rc语言最低者: %-16s %d分\n\r",pc_min->,pc_min->data.score1); print1();}void Sort(L l){L ll;Node *p,*rr,*s;ll=(L)malloc(sizeof(Node)); /* 用于做新的连表*/ll->next=NULL;if(l->next==NULL){cprintf("\n\r 没有信息可以排序!\n");return ;}p=l->next;while(p){s=(Node*)malloc(sizeof(Node)); /* 新建接点用于保存信息*/s->data=p->data;s->next=NULL;rr=ll;while(rr->next!=NULL && rr->next->data.total>=p->data.total)rr=rr->next;if(rr->next==NULL)rr->next=s;else{s->next=rr->next;rr->next=s;}p=p->next;}free(l);l->next=ll->next;cprintf("\n\r 排序已经完成!\n");}void Save(L l) /* */{FILE* fp;Node *p;int flag=1,count=0;fp=fopen("c:\\student","wb");if(fp==NULL){cprintf("\n\r 重新打开文件时发生错误!\n");exit(1);}p=l->next;while(p){if(fwrite(p,sizeof(Node),1,fp)==1){p=p->next;count++;}else{flag=0;break;}}if(flag){cprintf("\n\r 文件保存成功.(有%d条信息已经保存.)\n\r",count);shoudsave=0;}fclose(fp);}void main() /* */{L l; /* 链表*/FILE *fp; /* 文件指针*/int count=0 ,i,menu_select; /*菜单选择*/char ch ,creat;Node *p,*r;time_t it;clrscr();textmode(C80);window(1,1,80,25);textbackground(1); clrscr();textcolor(10);printf("\r 学生成绩管理系统");printf("\r -------扬州大学信息工程学院软件0902班") ;printf("\r 设计人员:李天鹏");l=(Node*)malloc(sizeof(Node));l->next=NULL;r=l;fp=fopen("c:\\student","rb");if(fp==NULL){cprintf("\n\r 该文件还未存在，是否需要创建？(y/n，Y/N)\n\r");scanf("%c",&creat);if(creat=='y'||creat=='Y'){fp=fopen("c:\\student","wb");}elseexit(0);}gotoxy(9,11); textcolor(12);cprintf("\n\r 文件已经打开,系统正在导入信息");for(i=0;i<6;i++){ cprintf(".");sleep(1);}textcolor(10);gotoxy(9,11); cprintf("\n ");while(!feof(fp)){p=(Node*)malloc(sizeof(Node));if(fread(p,sizeof(Node),1,fp)) /* 将文件的内容放入接点中*/{p->next=NULL;r->next=p;r=p; /* 将该接点挂入连中*/count++;}}fclose(fp);/* 关闭文件*/gotoxy(1,3);cprintf("\n\r信息导入完毕,系统共导入%d条信息",count);sleep(1);while(1){ menu();textcolor(12);cprintf("\r现在时间: "); it=time(NULL);cprintf(ctime(&it));cprintf("\r左边数字对应功能选择,请按0--9选择操作:\n\r");textcolor(10) ;scanf("%d",&menu_select);if(menu_select==0){if(shoudsave==1){ getchar(); textcolor(128+12);cprintf("\n\r 信息已经改动,是否将改动保存到文件中(y/n Y/N)?\n\r"); scanf("%c",&ch);if(ch=='y'||ch=='Y')Save(l);}cprintf("\n\r 你已经成功退出学生成绩信息系统,欢迎下次继续使用!\n"); break;}switch(menu_select){case 1: clrscr(); input(l); clrscr(); break; /* 输入学生*/case 2: clrscr(); Delete(l); PRINT1 /* 删除学生*/case 3: clrscr(); query(l); PRINT1 /* 查询学生*/case 4: clrscr(); modify(l); PRINT1 /* 修改学生*/case 5: clrscr(); Sort(l); PRINT1case 6: clrscr(); Statistic(l); PRINT1case 7: clrscr(); display(l); PRINT1case 8: clrscr(); Save(l); PRINT1 /* 保存学生*/case 9: clrscr(); cprintf(" ==========帮助信息==========\n");print2(); PRINT1 ;default: wrong(); getchar(); break;}}}。
java课程设计题目及代码
java课程设计题目及代码题目：学生成绩管理系统设计一个学生成绩管理系统，能够实现以下功能：1. 添加学生信息：录入学生的姓名、学号、性别等基本信息。
2. 添加学生成绩：录入学生的各门成绩，包括语文、数学、英语等课程。
3. 查找学生成绩：根据学号或姓名查找学生的成绩信息。
4. 修改学生成绩：根据学号或姓名修改学生的成绩信息。
5. 删除学生成绩：根据学号或姓名删除学生的成绩信息。
6. 统计学生成绩：统计全班学生的各门课程的平均分、最高分和最低分。
代码实现如下：```javaimport java.util.ArrayList;import java.util.HashMap;import java.util.Map;import java.util.Scanner;class Student {private String name;private String studentId;private String gender;private Map<String, Integer> scores;public Student(String name, String studentId, String gender) { = name;this.studentId = studentId;this.gender = gender;this.scores = new HashMap<>();}public String getName() {return name;}public String getStudentId() {return studentId;}public String getGender() {return gender;}public Map<String, Integer> getScores() {return scores;}public void addScore(String subject, int score) {scores.put(subject, score);}public void updateScore(String subject, int score) { scores.put(subject, score);}public void removeScore(String subject) {scores.remove(subject);}}class GradeManagementSystem {private ArrayList<Student> students;public GradeManagementSystem() {students = new ArrayList<>();}public void addStudent(String name, String studentId, String gender) {students.add(new Student(name, studentId, gender));}public Student findStudentById(String studentId) {for (Student student : students) {if (student.getStudentId().equals(studentId)) {return student;}}return null;}public Student findStudentByName(String name) {for (Student student : students) {if (student.getName().equals(name)) {return student;}}return null;}public void addScore(String studentId, String subject, int score) {Student student = findStudentById(studentId);if (student != null) {student.addScore(subject, score);}}public void updateScore(String studentId, String subject, int score) {Student student = findStudentById(studentId);if (student != null) {student.updateScore(subject, score);}}public void removeScore(String studentId, String subject) {Student student = findStudentById(studentId);if (student != null) {student.removeScore(subject);}}public void printStudentInfo(Student student) {System.out.println("姓名：" + student.getName());System.out.println("学号：" + student.getStudentId());System.out.println("性别：" + student.getGender());System.out.println("成绩：");for (Map.Entry<String, Integer> entry :student.getScores().entrySet()) {System.out.println(entry.getKey() + "：" +entry.getValue());}}public void printClassStatistics() {int chineseTotal = 0;int mathTotal = 0;int englishTotal = 0;int chineseMax = 0;int mathMax = 0;int englishMax = 0;int chineseMin = Integer.MAX_VALUE;int mathMin = Integer.MAX_VALUE;int englishMin = Integer.MAX_VALUE;for (Student student : students) {Map<String, Integer> scores = student.getScores();if (scores.containsKey("语文")) {int chineseScore = scores.get("语文");chineseTotal += chineseScore;chineseMax = Math.max(chineseMax, chineseScore);chineseMin = Math.min(chineseMin, chineseScore); }if (scores.containsKey("数学")) {int mathScore = scores.get("数学");mathTotal += mathScore;mathMax = Math.max(mathMax, mathScore);mathMin = Math.min(mathMin, mathScore);}if (scores.containsKey("英语")) {int englishScore = scores.get("英语");englishTotal += englishScore;englishMax = Math.max(englishMax, englishScore); englishMin = Math.min(englishMin, englishScore); }}int studentCount = students.size();double chineseAverage = (double) chineseTotal / studentCount;double mathAverage = (double) mathTotal / studentCount; double englishAverage = (double) englishTotal / studentCount;System.out.println("语文最高分：" + chineseMax);System.out.println("数学最高分：" + mathMax);System.out.println("英语最高分：" + englishMax);System.out.println("语文最低分：" + chineseMin);System.out.println("数学最低分：" + mathMin);System.out.println("英语最低分：" + englishMin);System.out.println("语文平均分：" + chineseAverage); System.out.println("数学平均分：" + mathAverage); System.out.println("英语平均分：" + englishAverage); }}public class Main {public static void main(String[] args) {GradeManagementSystem system = new GradeManagementSystem();// 添加学生信息system.addStudent("张三", "001", "男");system.addStudent("李四", "002", "女");system.addStudent("王五", "003", "男");// 添加学生成绩system.addScore("001", "语文", 90);system.addScore("001", "数学", 85);system.addScore("001", "英语", 92);system.addScore("002", "语文", 80);system.addScore("002", "数学", 75);system.addScore("002", "英语", 88);system.addScore("003", "语文", 95);system.addScore("003", "数学", 90);system.addScore("003", "英语", 97);// 查找学生成绩Student student = system.findStudentById("001"); if (student != null) {system.printStudentInfo(student);}// 修改学生成绩system.updateScore("002", "数学", 78);student = system.findStudentById("002");if (student != null) {system.printStudentInfo(student);}// 删除学生成绩system.removeScore("003", "语文");student = system.findStudentById("003");if (student != null) {system.printStudentInfo(student);}// 统计学生成绩system.printClassStatistics();}}```这是一个简单的学生成绩管理系统，通过添加学生信息、添加学生成绩、查找学生成绩、修改学生成绩、删除学生成绩和统计学生成绩等功能，可以对学生的成绩进行管理和操作。
基于JAVA的学生成绩管理系统的设计与实现(含源文件)
基于JAVA的学生成绩管理系统的设计与实现摘要：本文按照目前流行的B/S体系结构模式，结合现有的学生成绩管理系统的现状，采用SQL Server 2000数据库和JAVA技术，设计开发了学生成绩管理系统系统，本系统分为前台页面和后台管理两大部分，主要实现成绩查询、成绩删除、成绩添加、成绩修改四大主体功能。
在细节方面，着重考虑了用户添加成绩、成绩查询两方面的简易操作，力求为客户带来方便。
关键词：B/S模式；JA V A；SQL ServerAbstract：This according to the popular B / S architecture model, combined with the current status of student achievement management system using SQL Server 2000 database and JAVA technology, design and development of student achievement management system, the system is divided into front page and back office management two parts, the main accomplishment query results to delete, add scores, results modify the four main functions. In detail, the focus to consider the user to add results, performance query both easy to operate, and strive to bring convenience for customers.Key words：B/S mode；JA V A；SQL Server近年来，随着高校的扩招，运用常规的方法对学生成绩的管理变得越来越困难，因此学校迫切的需要一种高效的系统来帮助其管理学生的成绩。
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二、用到的实例及实际意义：
2.1 程序所用到的实例：
1、《Java2 使用教程》第 10 章例题 10.12 P282； 2、《Java2 使用教程》第 11 章例题 11.8 P323； 3、《Java2 使用教程》第 15 章所有例题均有使用作参考 P391-411； 4、在其他参考书和网上也有用到相关程序和代码，并有所参考和借鉴。
super("修改数据"); setSize(400,300); pan1.add(labName); pan1.add(txtName); pan2.add(labDate); pan2.add(txtDate); pan3.add(labScore); pan3.add(txtScore); pan4.add(btnQuery); pan4.add(btnModify); pan4.add(btnCancel); pan.setLayout(new GridLayout(3,1)); pan.add(pan1); pan.add(pan2); pan.add(pan3); getContentPane().add(pan,"Center"); getContentPane().add(pan4,"South");
}else{ System.out.println("不存在该记录! "); btnModify.setEnabled(false); txtName.setText(""); txtScore.setText(""); txtDate.setText(""); txtDate.setEditable(false); txtScore.setEditable(false);
Java 程序设计
1
Java 程序设计
系 专业 班级 学号 姓名 题目 任课教师
08 级嵌入式系统实验班 26 号
赵黎明
学生成绩管理系统 彭洁
Java 程序设计
2
一、课程设计要求：
1、用到书上（课本或实验册）上的至少三个实例； 2、用到至少两种布局和至少四种组件； 3、用到对话框； 4、用到对数据库的查询、删除、添加和修改； 5、最好用到输入输出流； 6、具有一定的实际意义。
System.out.println("记录修改完毕！"); btnModify.setEnabled(false); txtName.setText(""); txtScore.setText(""); txtDate.setText(""); txtDate.setEditable(false); txtScore.setEditable(false); con.close(); }catch(SQLException e){ } } } public static void main(String[] args) { new ModifyForm(); } }
Java 程序设计
7
='"+txtName.getText()+"'"); sql.executeUpdate("Update 成绩表 set 出生日期
='"+txtDate.getText()+"',成绩="+txtScore.getText()+" where 姓名 ='"+txtName.getText()+"'");
} }catch(SQLException e){ } }else if(ae.getSource()==btnModify){ try{
System.out.println("Update 成绩表 set 出生日期 ='"+txtDate.getText()+"',成绩="+txtScore.getText()+" where 姓名
dispose(); } else if(ae.getSource()==btnQuery){
try{ Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");}
catch(ClassNotFoundException e){ }
try{con=DriverManager.getConnection("jdbc:odbc:sun","gxy","123"); sql=con.createStatement(); rs=sql.executeQuery("select * from 成绩表 where 姓名
3.1.2 运行效果：
Java 程序设计
5
3.2.1 修改数据：
/*修改数据*/ import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; public class ModifyForm extends JFrame implements ActionListener {
='"+txtName.getText()+"'"); if(rs.next()){ txtName.setText(rs.getString("姓名")); txtScore.setText(new In34;)).toString()); txtDate.setText(rs.getDate("出生日期").toString()); btnModify.setEnabled(true); txtDate.setEditable(true); txtScore.setEditable(true);
super("学生成绩管理系统"); setSize(875,583); mSystem.add(mExit); mOperate.add(mAdd); mOperate.add(mDel); mOperate.add(mModify); mQuery.add(mName); mQuery.add(mScore); mHelp.add(mAbout); mBar.add(mSystem); mBar.add(mOperate); mBar.add(mQuery); mBar.add(mHelp); setJMenuBar(mBar); mExit.addActionListener(this); mAdd.addActionListener(this); mDel.addActionListener(this);
Java 程序设计
4
mModify.addActionListener(this); mName.addActionListener(this); mScore.addActionListener(this); mAbout.addActionListener(this); setContentPane(new MyPanel()); setVisible(true); } public void actionPerformed(ActionEvent ae){ if(ae.getSource()==mExit)
System.exit(0); else if(ae.getSource()==mAbout)
JOptionPane.showMessageDialog(this,"学生成绩管理系统\n\n 应用科学 学院\n\n2011 年 4 月","软件信息",RMATION_MESSAGE);
Java 程序设计
6
btnQuery.addActionListener(this); btnModify.addActionListener(this); btnCancel.addActionListener(this); btnModify.setEnabled(false); txtDate.setEditable(false); txtScore.setEditable(false); setVisible(true); txtName.requestFocus(); } public void actionPerformed(ActionEvent ae){ if(ae.getSource()==btnCancel){