JSP第四章课后题答案和实验报告

第四章实验报告4.7.1 实现日历（1）日历bean，CalcendarBean.java 实现年、月、日等相关属性的设置和获取，代码如下：package beans;import java.util.*;public class CalcendarBean{Calendar calendar = null;intyear,dayOfMonth,dayOfYear,weekOfYear,weekOfMonth,dayOfWeek,hour,minute,second;private String day;String date;String time;public CalcendarBean(){calendar=Calendar.getInstance();Date time = new Date();calendar.setTime(time);}public int getYear(){return calendar.get(Calendar.YEAR);}public String getMonth(){int m=1+calendar.get(Calendar.MONTH);String months[]={"1","2","3","4","5","6","7","8","9","10","11","12"};if (m>12)return "0";return months[m+1];}public String getDay(){int n = getDayOfWeek();String days[]={"日","一","二","三","四","五","六"};if (n>7)return "星期?";return days[n];}public String getDate(){return getYear() + "/" + getMonth() + "/" + getDayOfMonth();}public String getTime(){return getHour() + ":" + getMinute() + ":" + getSecond();}public int getDayOfMonth(){return calendar.get(Calendar.DAY_OF_MONTH);}public int getDayOfYear(){return calendar.get(Calendar.DAY_OF_YEAR);}public int getWeekOfYear(){return calendar.get(Calendar.WEEK_OF_YEAR);}public int getWeekOfMonth(){return calendar.get(Calendar.WEEK_OF_MONTH);}public int getDayOfWeek(){return calendar.get(Calendar.DAY_OF_WEEK)-1;}public int getHour(){return calendar.get(Calendar.HOUR_OF_DAY);}public int getMinute(){return calendar.get(Calendar.MINUTE);}public int getSecond(){return calendar.get(Calendar.SECOND);}}（2）日历的显示由calendar.jsp 通过调用javabean来实现显示，代码如下：<%@ page contentType="text/html;charset=GB2312" %><%@ page import="beans.CalcendarBean" %><jsp:useBean id="cal" class="beans.CalcendarBean" scope="session" ></jsp:useBean><td align="center"><font color="red"><jsp:getProperty name="cal" property="year"/></font>年<font color="red"><jsp:getProperty name="cal" property="month"/></font>月<font color="red"><jsp:getProperty name="cal" property="dayOfMonth"/></font>日星期<font color="blue"><jsp:getProperty name="cal" property="day"/></font></td><BR>当前时间为<jsp:getProperty name="cal" property="time"/><BR>今天是今年的第<jsp:getProperty name="cal" property="dayOfYear"/>天<BR>本周是今年的第<jsp:getProperty name="cal" property="weekOfYear"/>周<BR>本周是本月的第<jsp:getProperty name="cal" property="weekOfMonth"/>周（3）实现日历显示：显示结果 4.7.1-14.7.2实现留言板（1）留言板javabean,NoteBean.java主要实现作者、标题、和他们的相关属性的设置和获取，代码如下：package beans;public class NoteBean{public String title;public String author;public String content;public String getTitle(){return title;}public void setTitle(String title){this.title=title;}public String getAuthor(){return author;}public void setAuthor(String author){this.author=author;}public String getContent(){return content;}public void setContent(String content){this.content=content;}}（2）留言板的添加，通过insert.jsp来实现，包括标题、作者、内容，代码如下：<%@ page contentType="text/html; charset=gb2312" language="java" %><center><h1>留言管理</h1><hr><br><form action ="insert_do.jsp" method="post"><table><tr><td colspan="3">添加新留言</td></tr><tr><td>标题:</td><td><input type="text" name="title"></td></tr><tr><td>作者:</td><td><input type="text" name="author"></td></tr><tr><td>内容:</td><td><textarea name="content" cols="30" rows="6"></textarea></td></tr><tr><td colspan="2"><input type="submit" value="添加"><input type="reset" value="重置"></td></tr></table></form></center>显示结果 4.7.2-1（3）留言板通过insert-do.jsp来实现，代码如下：<%@ page contentType="text/html; charset=gb2312" %><%@ page import="beans.NoteBean"%><center><h1>添加的内容如下所示</h1><hr><br><jsp:useBean id="sb" class="beans.NoteBean" scope="session" ></jsp:useBean><jsp:setProperty name="sb" property="*"/><h1>标题:<jsp:getProperty name="sb" property="title" /></h1><h1>作者:<jsp:getProperty name="sb" property="author" /></h1><h1>内容:<jsp:getProperty name="sb" property="content" /></h1></center>（4）执行结果如图：显示结果 4.7.2-24.7.3实现购物车（1）购物车通过JavaBean,ShopBean.java实现，用一个哈希表对象list存放购物的商品，包括名称、数量、单位属性的设置和获取，代码如下：package beans;import java.util.*;public class ShopBean{ Hashtable list=new Hashtable();String item="";int mount=0;String unit="";public void Carl(){ }public void setItem(String newItem){ item=newItem;}public void setUnit(String newUnit){ unit=newUnit;}public void setMount(int m){ mount=m;}public Hashtable show(){String str="productname:"+item+" count:\n"+mount+" unit:\n"+unit;list.put(mount,str);return list;}}（2）添加商品通过car.jsp来实现，代码如下：<%@ page contentType="text/html;charset=GB2312"%><%@ page import="java.util.*"%><%@ page import="beans.ShopBean"%><jsp:useBean id="shop" class="beans.ShopBean" scope="session" > </jsp:useBean><p>这里是百货广场，选择您要购买的商品添加到购物车：<FORM action="show.jsp" method=post name=form><Select name="item" value="没选择"><Option value="电视机">电视机<Option value="苹果">苹果<Option value="可口可乐">可口可乐<Option value="牛奶">牛奶<Option value="茶叶">茶叶</Select><p>输入购买的数量:<Input type=text name="mount"><p>选择计量单位：<INPUT type="radio" name="unit" value="个">个<INPUT type="radio" name="unit" value="公斤">公斤<INPUT type="radio" name="unit" value="台">台<INPUT type="radio" name="unit" value="瓶">瓶<Input type=submit value="提交添加"></FORM>显示如图 4.7.3-1（3）显示添加商品的信息通过show.jsp来实现，代码如下：<%@ page contentType="text/html;charset=GB2312"%><%@ page import="java.util.*"%><%@ page import="beans.ShopBean"%><jsp:useBean id="shop" class="beans.ShopBean" scope="session" > </jsp:useBean><jsp:setProperty name="shop" property="*" /><% shop.show(); %><P>您的购物车有如下商品：<%Hashtable list=shop.show();Enumeration enuml=list.elements();out.print("123");while(enuml.hasMoreElements()){out.print("456");String goods=(String)enuml.nextElement();byte b[]=goods.getBytes("ISO-8859-1");goods=new String(b);out.print("<BR>"+goods);}%>显示如图 4.7.3-2。