JSP中上传图片 完整代码
upfile.jsp
<form method="post" action="uploadimage.jsp" name="form1"
enctype="multipart/form-data">
<input type="file" name="file">
<input type="submIT" name="sub" value="upload">
</form>
<form method="post" action="uploadimage.jsp" name="form1"
enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" name="sub" value="upload">
</form>
<STRONG><FONT color=#ff0000>uploadimage.jsp</FONT>
</STRONG>
uploadimage.jsp
<PRE class=="code">
<%@ page language="java" pageEncoding="gb2312"%>
<%@ page
import="java.io.*,java.awt.image.*,com.sun.image.codec.jpeg.*,jav a.sql.*,com.jspsmart.upload.*,java.util.*"%>
<%@ page import="mainClass.*"%>
<html>
<head>
<title>My JSP'uploadimage.jsp' starting page</title>
</head>
<body>
<%
S martUpload sma = new SmartUpload();
l ong file_max_size = 4000000;
S tring filename1 = "", ext = "", testvar = "";
S tring url = "uploadfiles/";
s ma.initialize(pageContext);
t ry
{
sma.setAllowedFilesList("jpg,gif");
sma.upload();
}catch (Exception e) {
%>
<script language="jscript">
alert("只允许上传jpg,gif格式图片");
window.location.href="upfile.jsp"
</script>
<%
}
try {
com.jspsmart.upload.File myf = sma.getFiles().getFile(0);
if (myf.isMissing()) {
%>
<script language="jscript">
alert("请选择要上传的文件！");
window.location.href="upfile.jsp"
</script>
<%
} else {
ext = myf.getFileExt();
int file_size = myf.getSize();
String saveurl = "";
if (file_size < file_max_size) {
Calendar cal = Calendar.getInstance();
String filename = String.valueOf(cal.getTimeInMills());
saveurl = request.getRealPath("/") + url;
saveurl += filename + "." + ext;
myf.saveAs(saveurl, sma.SAVE_PHYSICAL);
myclass mc = new myclass(request
.getRealPath("data/data.mdb"));
mc
.executeInsert("insert into [path] values('uploadfiles/"
+ filename + "." + ext + "')");//检查
out.println("图片上传成功！");
response.sendRedirect("showimg.jsp");
}
}
} catch (Exception e) {
e.printStackTrace();
}
%>
</body>
</html> </PRE>。
JSP图片上传／放大缩小／裁减的源代码
3000分求JSP 图片上传／放大缩小／裁减的源代码guestdsf竹省省市滋发息加友铜牌会员1 # 大 中 小 发表于 2009-08-27 10:33:003000分求JSP 图片上传／放大缩小／裁减的源代码。
能裁减固定大小比如（１２０＊１００）的就行。
有预览，能显示图片长宽和大小（file size)最好。
本人结帖率是99.87%, 可用分８０００+非常感谢！！如果没有JSP 源代码，PHP 源代码也可以。
package myBean; import java.io.*; public class uploadpic {String picPath;//图片路径 （如:F:picturea.gif ） public String pictype[];//设置图片的后缀名 FileInputStream in; int piclength;//设置图片的最大kb public void setpicPath(String picPath)//获得图片的路径 {this.picPath=picPath; } 设置图片的最大长度{this.piclength=piclength;}public int getpiclength(){return piclength;}public boolean testlength()//判断图片的长度是否大于设定的最大长度try{in=new FileInputStream(picPath);if(in.available()/1024>piclength)return false;}catch(IOException e){System.out.println(e.getMessage());}return true;}public void setpictype(String[] pictype)//设置图片的扩展名{this.pictype=pictype;}public boolean testpictype()//判断图片的扩展名是否是规定的{if(pictype!=null){for(int i=0;i <pictype.length;i ){if(picPath.endsWith(pictype))return true;}return false;}return false;}}以下是在jsp页面中调用uploadpic首先要引入此bean所在的包<%@page import="myBean.uploadpic" %><jsp:useBean id="pic" scope="page" class="myBean.uploadpic" /> 下一条语句是得到上一层页面，也就是用户提交的图片路径！picp=codetostring.codeToString(request.getParameter("picPath"));pic.setpicPath(picp);pic.setpiclength(100);//以kb为单位if(pic.testlength())out.print("length ok <br>");elseout.print("length ok");String p1,p2;p1=".jpg";p2=".gif";String[] type={p1,p2};pic.setpictype(type);if(pic.testpictype())out.print("typeok");elseout.print("type error");made by zonecens 不知道2楼的怎么样，我来学习一个！帮顶！好像百度一招很多百度一下，找到相关网页约11,400,000篇，用时0.036秒3000连个星星都升不了这个是JAVA代码package ftp;import .ftp.*;import .*;import java.awt.*;import java.awt.event.*;import java.applet.*;import java.io.*;class FTPextends Applet {FtpClient aftp;DataOutputStream outputs;TelnetInputStream ins;TelnetOutputStream outs;TextArea lsArea;Label LblPrompt;Button BtnConn;Button BtnClose;TextField TxtUID;TextField TxtPWD;TextField TxtHost;int ch;public String a = "没有连接主机";String hostname = "";public void init() {setBackground(Color.white);setLayout(new GridBagLayout());GridBagConstraints GBC = new GridBagConstraints();LblPrompt = new Label("没有连接主机");LblPrompt.setAlignment(Label.LEFT);BtnConn = new Button("连接");BtnClose = new Button("断开");BtnClose.enable(false);TxtUID = new TextField("", 15);TxtPWD = new TextField("", 15);TxtPWD.setEchoCharacter('*');TxtHost = new TextField("", 20);Label LblUID = new Label("User ID:");Label LblPWD = new Label("PWD:");Label LblHost = new Label("Host:");lsArea = new TextArea(30, 80);lsArea.setEditable(false);GBC.gridwidth = GridBagConstraints.REMAINDER;GBC.fill = GridBagConstraints.HORIZONTAL; ( (GridBagLayout) getLayout()).setConstraints(LblPrompt, GBC);add(LblPrompt);GBC.gridwidth = 1;( (GridBagLayout) getLayout()).setConstraints(LblHost, GBC);add(LblHost);GBC.gridwidth = GridBagConstraints.REMAINDER; ( (GridBagLayout) getLayout()).setConstraints(TxtHost, GBC);add(TxtHost);GBC.gridwidth = 1;( (GridBagLayout) getLayout()).setConstraints(LblUID, GBC);add(LblUID);GBC.gridwidth = 1;( (GridBagLayout) getLayout()).setConstraints(TxtUID, GBC);add(TxtUID);GBC.gridwidth = 1;( (GridBagLayout) getLayout()).setConstraints(LblPWD, GBC);add(LblPWD);GBC.gridwidth = 1;( (GridBagLayout) getLayout()).setConstraints(TxtPWD, GBC);add(TxtPWD);GBC.gridwidth = 1;GBC.weightx = 2;( (GridBagLayout) getLayout()).setConstraints(BtnConn, GBC);add(BtnConn);GBC.gridwidth = GridBagConstraints.REMAINDER;( (GridBagLayout) getLayout()).setConstraints(BtnClose, GBC);add(BtnClose);GBC.gridwidth = GridBagConstraints.REMAINDER;GBC.fill = GridBagConstraints.HORIZONTAL;( (GridBagLayout) getLayout()).setConstraints(lsArea, GBC);add(lsArea);}public boolean connect(String hostname, String uid,String pwd) {this.hostname = hostname;LblPrompt.setText("正在连接，请等待.....");try {aftp = new FtpClient(hostname);aftp.login(uid, pwd);aftp.binary();showFileContents();}catch (FtpLoginException e) {a = "无权限与主机:" + hostname + "连接!";LblPrompt.setText(a);return false;}catch (IOException e) {a = "连接主机:" + hostname + "失败!";LblPrompt.setText(a);return false;}catch (SecurityException e) {a = "无权限与主机:" + hostname + "连接!";LblPrompt.setText(a);return false;}LblPrompt.setText("连接主机:" + hostname + "成功!");return true;}public void stop() {try {aftp.closeServer();}catch (IOException e) {}}public void paint(Graphics g) {}public boolean action(Event evt, Object obj) { if (evt.target == BtnConn) {LblPrompt.setText("正在连接，请等待....."); if (connect(TxtHost.getText(), TxtUID.getText(), TxtPWD.getText())) {BtnConn.setEnabled(false);BtnClose.setEnabled(true);}return true;}if (evt.target == BtnClose) {BtnConn.enable(true);BtnClose.enable(false);LblPrompt.setText("与主机" + hostname + "连接已断开!");return true;}return super.action(evt, obj);}public boolean sendFile(String filepathname) { boolean result = true;if (aftp != null) {LblPrompt.setText("正在粘贴文件,请耐心等待....");String contentperline;try {a = "粘贴成功!";String fg = new String("\");int index = stIndexOf(fg);String filename = filepathname.substring(index + 1);File localFile;localFile = new File(filepathname); RandomAccessFile sendFile = new RandomAccessFile(filepathname, "r");//sendFile.seek(0);outs = aftp.put(filename);outputs = new DataOutputStream(outs); while (sendFile.getFilePointer() < sendFile.length()) {ch = sendFile.read();outputs.write(ch);outs.close();sendFile.close();}catch (IOException e) {a = "粘贴失败!";result = false;}LblPrompt.setText(a);showFileContents();}else {result = false;}return result;}public void showFileContents() {StringBuffer buf = new StringBuffer();lsArea.setText("");try {ins = aftp.list();while ( (ch = ins.read()) >= 0) { buf.append( (char) ch);}lsArea.appendText(buf.toString());ins.close();}catch (IOException e) {}}public static void main(String args[]) { Frame f = new Frame("FTP Client");f.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) { System.exit(0);}});FTP ftp = new FTP();ftp.init();ftp.start();f.add(ftp);f.pack();f.setVisible(true);}}2楼 2004-10-13 08:56 angel7532 [引用] [回复]这个是HTML网页<html><head><meta http-equiv="Content-Type" content="text/html; charset=GBK" /><title>FTP下载 </title><script type="text/javascript">var javawsInstalled = false;var isIE = false;var isICE = erAgent.indexOf("ICEBrowser") >=0;if (navigator.mimeTypes && navigator.mimeTypes.length) javawsInstalled = navigator.mimeTypes['application/x-java-jnlp-file'];elseisIE = true;function insertLink(url, name) {if (javawsInstalled) {document.write("<a href="" + url + "">" + name + " </a>");} else {if (isICE) {document.write("JBuilder's Web View does not support Web Start (no appropriate Web Start plugin is available). ");document.write("Other popular (external) browsers are supported");} else {document.write("Need to install Java Web Start");}document.write(" -- for more information, visit");document.write("<a href="/products/javawebstart/">" );document.write("the Java Web Start page");document.write(" </a>");}}</script><script type="text/vbscript">on error resume nextIf isIE ThenIf Not(IsObject(CreateObject("JavaWebStart.IsInstalled"))) ThenjavawsInstalled = falseElsejavawsInstalled = trueEnd IfEnd If</script></head><body><h1>Java Web Start application </h1> <script type="text/javascript"><!--insertLink("FTPEXE.jnlp","FTP下载");// --></script><noscript><a href="FTPEXE.jnlp">FTP下载 </a></noscript></body></html>3楼 2004-10-13 09:21 szabo [引用] [回复]angel7532(卡卡西):哪我服务器上要不要作一些配置或安装其他软件呢？4楼 2004-10-15 09:30 szabo [引用] [回复] 不能沉啊。
JSP上传图片的实现
在用java开发企业器系统的使用,特别是涉及到与办公相关的软件开发的时候,文件的上传是客户经常要提到的要求.因此有一套很好文件上传的解决办法也能方便大家在这一块的开发.首先申明,该文章是为了自己记录一备以后开发需要的时候,不用手忙脚乱哈哈........现在在国内用的非常多的一般是两种方法解决来解决文件上传.cos.jar + uploadbean.jar + filemover.jar这个是用的非常普遍的,原因是因为他操作方便,是我们不必再去关注,那些文件的输入和输出流,使我们从底层的流中解脱出来.uploadfile,uploadbean,multipartformdatarequest<%@ page contenttype="text/html;charset=gb2312" %><head><title>fbysss uploadbean 示例</title><!--meta http-equiv="content-type" content="text/html; charset=iso-8859-1"--><!--meta http-equiv="content-type" content="text/html; charset=gb2312"--></head><form name="form1" method="post" action="sssupload.jsp" enctype="multipart/form-data"><input name="title" type= "text" value="中文字"><td class="bodystyle">附件</td><td class="bodystyle"> <input name="attach" type="file" id="attach" size="50" > </td><input name="ok" type= "submit" value="提交"></form>2.读取表单页面sssgetdata.jsp<!--//==================================================== ======================//文件：uploadbean上传实例//功能：解决中文乱码，完成文件上传，并提供上传改名解决方案//作者：fbysss//msn:jameslastchina@//==================================================== ======================--><%@ page contenttype="text/html;charset=gbk" %><%@ page language="java" import="com.jspsmart.upload.*"%><%@ page import="java.text.simpledateformat"%><%@ page import="java.io.file"%><%@ page import="java.util.*"%><%@ page import="javazoom.upload.*"%><%@ page import="uploadutilities.filemover"%><head><meta http-equiv="content-type" content="text/html; charset=gb2312"></head><%request.setcharacterencoding("gbk");//设置编码格式，就不用一个个转码了。
jsp图片上传(commons-fileupload组件)
1.开发环境：1）eclipse3.2+tomcat5.5；2）创建dynamic web project；3）下载：Commons FileUpload 可以在/commons/fileupload/下载附加的Commons IO 可以在/commons/io/下载将commons-fileupload-1.2.1.jar commons-io-1.4.jar拷贝到WebContent\WEB-INF\\lib 目录；2.前台：<;form method=";post"; enctype=";multipart/form-data"; action=";upload.jsp"; target=";_blank";>;<;%-- 类型enctype用multipart/form-data，这样可以把文件中的数据作为流式数据上传，不管是什么文件类型，均可上传--%>;<;table>;<;tr>;<;td>;作品：<;input type=";file"; name=";upfile"; size=";50";>;<;/td>;<;/tr>;<;tr>;<;td>;作者：<;input type=";text"; name=";author"; size=";22";>;标题：<;input type=";text"; name=";title"; size=";22";>;<;input type=";submit"; name=";submit"; value=";上传";>;<;/td>;<;/tr>;<;tr>;<;td>;备注：上传的jpg图片（显示扩展名为.jpg）大小不能超过4M！<;/td>;<;/tr>; <;/table>;<;/form>;3.后台：1)引用：<;%@ page import=";mons.fileupload.servlet.ServletFileUpload";%>; <;%@ page import=";mons.fileupload.disk.DiskFileItemFactory";%>; <;%@ page import=";mons.fileupload.*";%>;2)代码：String id=null;//上传记录idString destinationfileName=null;//目标文件名String author=null;String title=null;int flag=0;//上传标志String uploadPath =request.getSession().getServletContext().getRealPath(";/";)+";upload/";;//图片上传路径String tempPath = request.getSession().getServletContext().getRealPath(";/";)+";upload/temp/";;//图片临时上传路径StringimagePath=request.getScheme()+";://";+request.getServerName()+";:";+request.getS erverPort()+request.getContextPath()+";/";; // 图片网络相对路径if(!new File(uploadPath).isDirectory()) new File(uploadPath).mkdirs();// 文件夹不存在就自动创建：if(!new File(tempPath).isDirectory())new File(tempPath).mkdirs();try {DiskFileUpload fu = new DiskFileUpload();fu.setSizeMax(4194304);// 设置最大文件尺寸，这里是4MBfu.setSizeThreshold(4096);// 设置缓冲区大小，这里是4kbfu.setRepositoryPath(tempPath);// 设置临时目录：List fileItems = fu.parseRequest(request);// 得到所有的文件：Iterator i = fileItems.iterator();while(i.hasNext()) {// 依次处理表单中每个域FileItem file = (FileItem)i.next();// 获得用户上传时文件名if (file.isFormField()){ //获得文本域表单数据if(";author";.equals(file.getFieldName()))author=codeToString(file.getString());if(";title";.equals(file.getFieldName())) title=codeToString(file.getString()); continue;//非file域不处理}String sourcefileName = file.getName();if( sourcefileName.endsWith(";.jpg";)){//生成上传后的文件名Random rd = new Random();Calendar time = Calendar.getInstance();id=String.valueOf(time.get(Calendar.YEAR))+ String.valueOf(time.get(Calendar.MONTH)+1)+ String.valueOf(time.get(Calendar.DAY_OF_MONTH))+ String.valueOf(time.get(Calendar.HOUR_OF_DAY))+ String.valueOf(time.get(Calendar.MINUTE))+ String.valueOf(time.get(Calendar.SECOND))+ String.valueOf(rd.nextInt(100));destinationfileName=id+";.jpg";;File fTmp=new File(uploadPath+destinationfileName);file.write(fTmp);//out.print(";<;img src=";+imagePath+";upload/";+destinationfileName+";>;";); flag=1;//上传成功标志1}else{out.print(";上传失败，只能上传jpg文件！";); }}//out.print(";<;script>;location.href=\";demo.jsp\";;<;/script>;";);}catch (IOException e) {out.print(";上传失败！";);}out.flush();out.close();4.主要解决点：1)问题：form设置enctype=";multipart/form-data";，request.getParameters函数无法获取表单域值；2)解决方案：if (file.isFormField()){ //获得文本域表单数据if(";author";.equals(file.getFieldName()))author=codeToString(file.getString());if(";title";.equals(file.getFieldName())) title=codeToString(file.getString()); continue;//非file域不处理}。
JSP实现图片上传压缩添加水印
Struts1实现文件上传功能实现技术：Struts1.3+JSP主要实现：上传文件类型的前台验证，后台验证上传文件的类型、格式；实现图片的压缩和添加水印等功能。
JSP页面部分代码：（1）上传表单代码<form action='bk/image/addImage.do?method=add'method="post"enctype="multipart/form-data"><label for='imagename' >上传图片：</label><input type="file" class='formfield' name='imagename' id='imagename' /><span style="color: red; margin-left:40px;">* 只允许上传gif、jpg、bmp、png！</span> <input type="submit" value="提交" onclick="return SureSubmit(this.form)"/><input type="reset" value="重置" /></form>（2）JavaScript验证代码<script type="text/javascript">function verifyForm(objForm){//取得上传文本框的值var imagefile=objForm.imagename.value;//取得上传文件扩展名var ext=imagefile.substring(imagefile.length-3).toLowerCase();if (ext!="jpg" && ext!="gif" && ext!="bmp" && ext!="png"){alert("只允许上传gif、jpg、bmp、png！");return false;}return true;}function SureSubmit(objForm){//验证通过则提交表单if (verifyForm(objForm)) objForm.submit();return false;}</script>（3）/WEB-INF/UI/success.jsp代码<span style="color: red; font-size: 20px; font-weight: bold;">${suc }</span><a href="${backurl }">点击返回</a>（4）/WEB-INF/UI/fail.jsp代码<span style="color: red; font-size: 20px; font-weight: bold;">操作失败!${message }</span><a href="javascript:void(0)" onclick="javascript:window.history.go(-1);">单击返回前一页</a>Struts1中配置文件的配置<form-beans><form-bean name="imageForm" type="com.ImageForm"/></form-beans><action-mappings><action path="/bk/image/addImage" type="com.action.UploadAction" name="imageForm" scope="request" parameter="method"><forward name="fail" path="/WEB-INF/UI/fail.jsp"/><forward name="success" path="/WEB-INF/UI/success.jsp"/></action></action-mappings>后台代码（1）Domain Objectpackage com;import java.io.File;import java.io.FileOutputStream;import java.util.Arrays;import java.util.List;import org.apache.struts.action.ActionForm;import org.apache.struts.upload.FormFile;public class ImageForm extends ActionForm {/**图片路径**/private FormFile imagename;public FormFile getImagename() {return imagename;}public void setImagename(FormFile imagename) {this.imagename = imagename;}//验证上传图片的格式和类型public static boolean validateImageFileType(FormFile formFile) {if (formFile != null && formFile.getFileSize() > 0) {// 获取上传文件的后缀String ext = formFile.getFileName().substring(formFile.getFileName().lastIndexOf('.') + 1).toLowerCase();//允许上传的文件类型List<String> arrowType =Arrays.asList("image/bmp","image/png","image/gif","image/jpg","image/jpeg","image/pjpeg") ;//允许上传的文件后缀List<String> arrowExtension = Arrays.asList("gif","jpg","bmp","png");returnarrowType.contains(formFile.getContentType().toLowerCase())&&arrowExtension.contains(ext) ;}return true;}/**获取上传文件的后缀*/public static String getExt(FormFile formfile){returnformfile.getFileName().substring(formfile.getFileName().lastIndexOf('.')+1).toLowerCase() ;}/***保存文件*@param savedir存放目录*@param fileName文件名称*@param data保存的内容*@return保存的文件*@throws Exception*/public static File saveFile(File savedir, String fileName, byte[] data) throws Exception{ if(!savedir.exists()) savedir.mkdirs();//如果目录不存在就创建File file = new File(savedir, fileName);FileOutputStream fileoutstream = new FileOutputStream(file);fileoutstream.write(data);fileoutstream.close();return file;}}(2)Action文件的内容package com.action;import java.awt.Color;import java.io.File;import java.text.SimpleDateFormat;import java.util.Date;import java.util.UUID;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import org.apache.struts.actions.DispatchAction;import org.apache.struts.upload.FormFile;import com.ImageForm;import com.util.ImageSizer;import com.util.WarterImage;public class UploadAction extends DispatchAction {/***添加图片*/public ActionForward add(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {ImageForm image = (ImageForm) form;// 获取到页面中传输过来的文件FormFile file = image.getImagename();if (!ImageForm.validateImageFileType(file)) {request.setAttribute("message", "文件格式不正确,只允许上传gif/jpg/png/bmp图片");return mapping.findForward("fail");}// 判断传过来的数据是否为空，如果为空，返回页面if (null != file.getFileName() && file.getFileSize() > 0&& file.getFileSize() < 204800) {// 我们要生成一个文件路径，我们应该把上传的文件放到一个文件夹内，路径第一如下upfile/images/2011/X/x/sss.xxSimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd/HH/");String fileUrlDir = "/upfile/images/" + sdf.format(new Date());//得到图片保存目录的真实路径String fileUrl = request.getSession().getServletContext().getRealPath(fileUrlDir)+ "\\";System.out.println(fileUrl);String ext = ImageForm.getExt(file);String imagename = UUID.randomUUID().toString() + "." + ext;//构建文件名称ImageForm.saveFile(new File(fileUrl), imagename, file.getFileData());// 文件保存到服务器上的路径String imagePro = fileUrl + imagename;// 对图片进行压缩,如果传过来的数据为0，则使用默认值ImageSizer.resize(new File(imagePro), new File(imagePro), 120, ext);// 添加水印,这个路径要选择服务器的路径，保存要和保存图片的路径一致WarterImage.pressText("添加水印", imagePro, "宋体", 0, Color.black, 10, 0, 0);request.setAttribute("suc", "图片保存成功");return mapping.findForward("success");}// 判断图片不能太大else if (null != file.getFileName() && file.getFileSize() > 0) {request.setAttribute("message", "提交图片不能超过200k");return mapping.findForward("fail");}return mapping.findForward("fail");}}图片压缩和添加水印类（1）图片压缩package com.util;import java.awt.Color;import ponent;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.MediaTracker;import java.awt.Toolkit;import java.awt.image.BufferedImage;import java.awt.image.ConvolveOp;import java.awt.image.Kernel;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import javax.imageio.ImageIO;import javax.swing.ImageIcon;import com.sun.image.codec.jpeg.JPEGCodec;import com.sun.image.codec.jpeg.JPEGEncodeParam;import com.sun.image.codec.jpeg.JPEGImageEncoder;/***图像压缩工具**/public class ImageSizer {public static final MediaTracker tracker = new MediaTracker(new Component() { private static final long serialVersionUID = 1234162663955668507L;});/***@param originalFile原图像*@param resizedFile压缩后的图像*@param width图像宽*@param format图片格式jpg,png,gif(非动画)*@throws IOException*/public static void resize(File originalFile, File resizedFile, int width, String format) throws IOException {if(format!=null && "gif".equals(format.toLowerCase())){resize(originalFile, resizedFile, width, 1);return;}FileInputStream fis = new FileInputStream(originalFile);ByteArrayOutputStream byteStream = new ByteArrayOutputStream();int readLength = -1;int bufferSize = 1024;byte bytes[] = new byte[bufferSize];while ((readLength = fis.read(bytes, 0, bufferSize)) != -1) {byteStream.write(bytes, 0, readLength);}byte[] in = byteStream.toByteArray();fis.close();byteStream.close();Image inputImage = Toolkit.getDefaultToolkit().createImage( in );waitForImage( inputImage );int imageWidth = inputImage.getWidth( null );if ( imageWidth < 1 )throw new IllegalArgumentException( "image width "+ imageWidth + " is out of range");int imageHeight = inputImage.getHeight( null );if ( imageHeight < 1 )throw new IllegalArgumentException( "image height " + imageHeight + " is out of range" );// Create output image.int height = -1;double scaleW = (double) imageWidth / (double) width;double scaleY = (double) imageHeight / (double) height;if (scaleW >= 0 && scaleY >=0) {if (scaleW > scaleY) {height = -1;} else {width = -1;}}Image outputImage = inputImage.getScaledInstance( width, height,java.awt.Image.SCALE_DEFAULT);checkImage( outputImage );encode(new FileOutputStream(resizedFile), outputImage, format);}/**Checks the given image for valid width and height.*/private static void checkImage( Image image ) {waitForImage( image );int imageWidth = image.getWidth( null );if ( imageWidth < 1 )throw new IllegalArgumentException( "image width "+ imageWidth + " is out of range");int imageHeight = image.getHeight( null );if ( imageHeight < 1 )throw new IllegalArgumentException( "image height "+ imageHeight + " is out of range"); }/**Waits for given image to e before querying image height/width/colors.*/ private static void waitForImage( Image image ) {try {tracker.addImage( image, 0 );tracker.waitForID( 0 );tracker.removeImage(image, 0);} catch( InterruptedException e ) { e.printStackTrace(); }}/**Encodes the given image at the given quality to the output stream.*/private static void encode( OutputStream outputStream, Image outputImage, String format )throws java.io.IOException {int outputWidth = outputImage.getWidth( null );if ( outputWidth < 1 )throw new IllegalArgumentException( "output image width " + outputWidth + " is out of range" );int outputHeight = outputImage.getHeight( null );if ( outputHeight < 1 )throw new IllegalArgumentException( "output image height "+ outputHeight + " is out of range" );// Get a buffered image from the image.BufferedImage bi = new BufferedImage( outputWidth, outputHeight,BufferedImage.TYPE_INT_RGB );Graphics2D biContext = bi.createGraphics();biContext.drawImage( outputImage, 0, 0, null );ImageIO.write(bi, format, outputStream);outputStream.flush();}/***缩放gif图片*@param originalFile原图片*@param resizedFile缩放后的图片*@param newWidth宽度*@param quality缩放比例(等比例)*@throws IOException*/private static void resize(File originalFile, File resizedFile, int newWidth, float quality) throws IOException {if (quality < 0 || quality > 1) {throw new IllegalArgumentException("Quality has to be between 0 and 1");}ImageIcon ii = new ImageIcon(originalFile.getCanonicalPath());Image i = ii.getImage();Image resizedImage = null;int iWidth = i.getWidth(null);int iHeight = i.getHeight(null);if (iWidth > iHeight) {resizedImage = i.getScaledInstance(newWidth, (newWidth * iHeight) / iWidth, Image.SCALE_SMOOTH);} else {resizedImage = i.getScaledInstance((newWidth * iWidth) / iHeight, newWidth, Image.SCALE_SMOOTH);}// This code ensures that all the pixels in the image are loaded.Image temp = new ImageIcon(resizedImage).getImage();// Create the buffered image.BufferedImage bufferedImage = new BufferedImage(temp.getWidth(null),temp.getHeight(null),BufferedImage.TYPE_INT_RGB);// Copy image to buffered image.Graphics g = bufferedImage.createGraphics();// Clear background and paint the image.g.setColor(Color.white);g.fillRect(0, 0, temp.getWidth(null), temp.getHeight(null));g.drawImage(temp, 0, 0, null);g.dispose();// Soften.float softenFactor = 0.05f;float[] softenArray = {0, softenFactor, 0, softenFactor, 1-(softenFactor*4), softenFactor, 0, softenFactor, 0};Kernel kernel = new Kernel(3, 3, softenArray);ConvolveOp cOp = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null);bufferedImage = cOp.filter(bufferedImage, null);// Write the jpeg to a file.FileOutputStream out = new FileOutputStream(resizedFile);// Encodes image as a JPEG data streamJPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bufferedImage);param.setQuality(quality, true);encoder.setJPEGEncodeParam(param);encoder.encode(bufferedImage);}}（2）添加水印package com.util;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import javax.imageio.ImageIO;import com.sun.image.codec.jpeg.JPEGCodec;import com.sun.image.codec.jpeg.JPEGImageEncoder;public class WarterImage {public WarterImage() {}/****把图片印刷到图片上**@param pressImg--*水印文件*@param targetImg--*目标文件*@param x*--X坐标*@param y*--y坐标*/public final static void pressImage(String pressImg, String targetImg,int x, int y) {try {// 目标文件File _file = new File(targetImg);Image src = ImageIO.read(_file);// 获取图片的宽度int wideth = src.getWidth(null);// 获取图片的高度int height = src.getHeight(null);BufferedImage image = new BufferedImage(wideth, height,BufferedImage.TYPE_INT_RGB);Graphics g = image.createGraphics();g.drawImage(src, 0, 0, wideth, height, null);// 水印文件File _filebiao = new File(pressImg);Image src_biao = ImageIO.read(_filebiao);// 获取水印图片的宽度int wideth_biao = src_biao.getWidth(null);// 获取水印图片的高度int height_biao = src_biao.getHeight(null);// 如果传输过来的坐标值为x==-1,y==-1,则水印图片添加到左下角if (x == -1 && y == -1) {g.drawImage(src_biao, wideth - wideth_biao, height- height_biao, wideth_biao, height_biao, null);} else {g.drawImage(src_biao, x, y, wideth_biao, height_biao, null);}// 水印文件结束g.dispose();FileOutputStream out = new FileOutputStream(targetImg);JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);encoder.encode(image);out.close();} catch (Exception e) {e.printStackTrace();}}/****************************************************************************打印文字水印图片**@param pressText*--文字*@param targetImg--*目标图片*@param fontName--*字体名*@param fontStyle--*字体样式*@param color--*字体颜色字体大小*@param x*x坐标轴*@param y*y坐标轴*/public static void pressText(String pressText, String targetImg,String fontName, int fontStyle, Color color, int fontSize, int x,int y) {try {System.out.println(targetImg);File _file = new File(targetImg);Image src = ImageIO.read(_file);int wideth = src.getWidth(null);int height = src.getHeight(null);BufferedImage image = new BufferedImage(wideth, height,BufferedImage.TYPE_INT_RGB);Graphics g = image.createGraphics();g.drawImage(src, 0, 0, wideth, height, null);if (color == null) {g.setColor(Color.black);} else {g.setColor(color);}g.setFont(new Font(fontName, fontStyle, fontSize));// 判断输入的是中文还是英文，因为英文和中文所占的像素比例不一样，所以需要设置一下，美观漂亮byte[] bytes = pressText.getBytes();int i = bytes.length;// i为字节长度int j = pressText.length();// j为字符长度// 如果i==j 说明是英文字符if (i == j) {g.drawString(pressText, (int) (wideth- (fontSize * (pressText.length() / 2.0)) - x), height- y);} else {g.drawString(pressText, (int) (wideth- (fontSize * pressText.length()) - x), height - y);}g.dispose();FileOutputStream out = new FileOutputStream(targetImg);JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);encoder.encode(image);out.close();} catch (Exception e) {System.out.println(e);}}}。
JSP个理图片上传并保存
来源MSDN:ghost1392
common-fileupload是jakarta项目组开发的一个功能很强大的上传文件组件
下面先介绍上传文件到服务器（多文件上传）：
import javax.servlet.*;
文件1：<input name="x" size="40" type="file">
</td></tr>
<tr><td width="100%" colspan="2">
public class upload extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GB2312";
}
xception("fail to upload");
}
<br/><br/>
<table>
<tr><td align="center"><input name="upload" type="submit" value="开始上传"/></td></tr>
</table>
</form>
现在介绍上传文件到服务器，下面只写出相关代码：
以sql2000为例，表结构如下：
jsp图片上传
首先下载jsmartcom_zh_CN.jar /hijackwust然后将其解压，并放到项目web-inf下面的lib目录下，之后到myeclipse的项目下导入jar包到项目下。
JSP+Mysql+jspsmart=上传图片并生成略缩图片然后记录到数据库原代码代码是由网上找的，然后自己修改了一下将输入的信息以及图片路径保存到数据库。
根目录必须预先有2个文件夹存在1。
pc 文件夹 --> 用来装上传的正本图片2。
pc2 文件夹 --> 用来装缩小的图片希望对大家有用~~jspsmart插件下栽地址/upfile*************.rar将web-inf 这个目录下面的那个jspsmart包,放入你自己的.classess文件夹里面放的位置是：tomcat\网站根目录\WEB-INF\classes\com\jspsmart\uploadupimg.jsp--------------------------------------------------------------------------------------<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>上传文件</title></head><body><table border="0" align="center" cellpadding="0" cellspacing="0"><tr><td height="45" align="center" valign="middle"><formaction="uploadimage.jsp" method="post" enctype="multipart/form-data" name="form1"><p>上传人姓名(注意上面加红色的代码一定要加，否则获取页面就得不到参数）<input name="name" type="text" id="name" onpaste="return false;" style='border: 1px solid #CCCCCC; font-size:9pt;margin-top:4px;ime-mode:disabled;' size="20"onfocusout="if(isSearch(this.value))this.focus()" /></p><p>请选择上传的图片<input type="file" name="file"><input type="submit" name="Submit" value="上传"></p></form></td></tr></table></body></html>===================================================================== =======uploadimage.jsp--------------------------------------------------------------------------------------<%@ page contentType="text/html;charset=gb2312" language="java" import="java.io.*,java.awt.Image,java.awt.image.*,com.sun.image.codec .jpeg.*,java.sql.*,com.jspsmart.upload.*,java.util.*"%><jsp:useBean id="db" scope="page" class="classmate.DB"/><html><head><title>文件上传处理页面</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"> </head><bord><%SmartUpload mySmartUpload =new SmartUpload();long file_size_max=4000000;String fileName2="",ext="",testvar="";String url="pc/"; //应保证在根目录中有此目录的存在//初始化mySmartUpload.initialize(pageContext);//只允许上载此类文件try {mySmartUpload.setAllowedFilesList("jpg,gif");//上载文件mySmartUpload.upload();} catch (Exception e){%><SCRIPT language=javascript>alert("只允许上传.jpg和.gif类型图片文件");window.location=''upfile.jsp'';</script><%}try{com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(0); if (myFile.isMissing()){%><SCRIPT language=javascript>alert("请先选择要上传的文件");window.location=''upfile.jsp'';</script><%}//String myFileName=myFile.getFileName(); //取得上载的文件的文件名ext= myFile.getFileExt(); //取得后缀名int file_size=myFile.getSize(); //取得文件的大小String str1=mySmartUpload.getRequest().getParameter("name"); //获得上传的人名称！String saveurl="";if(file_size<file_size_max){//更改文件名，取得当前上传时间的毫秒数值Calendar calendar = Calendar.getInstance();String filename = String.valueOf(calendar.getTimeInMillis());saveurl=request.getRealPath("/")+url;saveurl+=filename+"."+ext; //保存路径myFile.saveAs(saveurl,mySmartUpload.SAVE_PHYSICAL);//out.print(filename);//-----------------------上传完成，开始生成缩略图-------------------------java.io.File file = new java.io.File(saveurl); //读入刚才上传的文件String url2="pc2/";String newurl=request.getRealPath("/")+url2+filename+"."+ext; //新的缩略图保存地址String weburl=filename+"."+ext; //保存数据库路径Image src =javax.imageio.ImageIO.read(file); //构造Image 对象float tagsize=100;old_w=src.getWidth(null); //得到源图宽int old_h=src.getHeight(null);int new_w=0;int new_h=0; //得到源图长int tempsize;float tempdouble;if(old_w>old_h){tempdouble=old_w/tagsize;}else{tempdouble=old_h/tagsize;}new_w=Math.round(old_w/tempdouble);new_h=Math.round(old_h/tempdouble);//计算新图长宽BufferedImage tag = newBufferedImage(new_w,new_h,BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(src,0,0,new_w,new_h,null); //绘制缩小后的图FileOutputStream newimage=new FileOutputStream(newurl); //输出到文件流JPEGImageEncoder encoder =JPEGCodec.createJPEGEncoder(newimage);encoder.encode(tag); //近JPEG编码newimage.close();String sql="insert into pc(name,url,day) values ('"+str1+"','"+ weburl +"',NOW())";db.executeUpdate(sql);%>yes ok!!<%}else{out.print("<SCRIPT language=''javascript''>");out.print("alert(''上传文件大小不能超过"+(file_size_max/1000)+"K'');");out.print("window.location=''upfile.jsp;''"); out.print("</SCRIPT>");}}}catch (Exception e){e.toString();}%></bord></html>。
jsp上传图片方法
«博客园首页如何在Jsp上传图片作者：夏夏知来源：博客园发布时间：2012-03-28 11:43 阅读：246 次原文链接[收藏] 1. 新建一个Dynamic Web Project：2. 键入工程名UploadImage：3. 选择Dynamic web module version ：2.54. 点击“Finish”5. 新建两个jsp文件：ImageUpload.jsp和ImageUploadHandler.jsp6. 新建一个类，专门用来处理图片上传新建一个包mytest：在包下新建一个类FileUpload：代码内容：package mytest;import java.awt.image.BufferedImage;import java.io.*;import java.awt.Image;import com.sun.image.codec.jpeg.JPEGCodec;import com.sun.image.codec.jpeg.JPEGImageEncoder; public class FileUpload{public static void uploadImage(String imgFolderPath,String srcFileName,String dstFileName) throws IOException{//判断文件夹image是否存在，若不存在则创建File folder = new File(imgFolderPath);System.out.println("function'uploadFileTest2'-imgFolderPath'"+imgFolderPath);if(!folder.exists()){folder.mkdir();System.out.println("maked a folder!");}File _file = new File(srcFileName); //读入文件Image src = javax.imageio.ImageIO.read(_file); //构造Image对象int wideth=src.getWidth(null); //得到源图宽int height=src.getHeight(null); //得到源图长BufferedImage tag = newBufferedImage(wideth,height,BufferedImage.TYPE_INT_RGB); tag.getGraphics().drawImage(src,0,0,wideth,height,null); FileOutputStream out=new FileOutputStream(dstFileName); //输出到文件流JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(tag); //JPEG编码out.close();System.out.println("function 'uploadFileTest2'-status:A Image File Saved!");}}发现报错：找到代码的库Libraries：打开rt.jar所在文件夹：复制这个文件：右键粘贴到WEB_INF\lib下：效果：没再报错。
JSP实现文件上传功能
JSP实现⽂件上传功能本⽂实例为⼤家分享了JSP实现⽂件上传功能的具体代码，供⼤家参考，具体内容如下⼀、准备部分需要fileupload.jar与io.jar包共同完成。
构建完成路径后可继续。
⼆、页⾯部分<form action="UploadServlet" method="post" enctype="multipart/form-data">学号:<input type="text" name="sno"/><br/>姓名:<input type="text" name="sname"/><br/>上传照⽚:<input type="file" name="spicture"/><br/><input type="submit" value="注册"/></form>注意：1.⽂件上传必须要使⽤post，以避免⽤get⽅法时传输总量超过搜索框所能承载最⼤字符数。
2.必须加⼊enctype="multipart.form-data"字段3.⽂件处需⽤“file”三、Servlet部分package webtest;import java.io.File;import java.io.IOException;import java.util.Iterator;import java.util.List;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import mons.fileupload.FileItem;import mons.fileupload.FileItemFactory;import mons.fileupload.FileUploadBase;import mons.fileupload.FileUploadException;import mons.fileupload.disk.DiskFileItemFactory;import mons.fileupload.servlet.ServletFileUpload;/*** Servlet implementation class UploadServlet*/@WebServlet("/UploadServlet")public class UploadServlet extends HttpServlet {private static final long serialVersionUID = 1L;protected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {request.setCharacterEncoding("utf-8");// 请求编码处理，传输时response.setCharacterEncoding("utf-8");// 响应编码处理,传输时response.setContentType("utf-8");// 响应编码处理，显⽰时boolean isMultipart = ServletFileUpload.isMultipartContent(request);// 判断是否有entype="multipart/form-data"部分if (isMultipart) {try {FileItemFactory factory = new DiskFileItemFactory();ServletFileUpload upload = new ServletFileUpload(factory);//设置上传时的内存缓冲区⼤⼩，超出时写⼊临时⽂件 10kb((DiskFileItemFactory) factory).setSizeThreshold(10240);//单位byte//设置临时⽂件⽬录，防⽌系统空间不⾜((DiskFileItemFactory) factory).setRepository(new File(request.getSession().getServletContext().getRealPath("Uploadtemp")));//动态获取Uploadtemp⽂件夹位于该项⽬中的位置 //控制上传单个⽂件的最⼤值 20kbupload.setSizeMax(20480);//单位byteList<FileItem> items = upload.parseRequest(request);// 解析form中的所有请求字段，并保存在item中Iterator<FileItem> iter = items.iterator();while (iter.hasNext()) {// 解析时⽆顺序，因此需根据名字查找FileItem item = iter.next();if (item.isFormField()) {//⾮⽂件数据String itemName = item.getFieldName();//获取⾮⽂件的范围数据名if (itemName.equals("sno")) {int sno = -1;sno = Integer.parseInt(item.getString("utf-8"));}else if (itemName.equals("sname")) {String sname = null;sname = item.getString("utf-8");}else {System.out.println("其他字段...");}} else {//⽂件上传String fileName = item.getName();//获取⽂件范围数据。
js实现上传图片功能
js实现上传图⽚功能前端上传图⽚的原理是：运⽤input type=“file”的标签获取图⽚，再使⽤FileReader这个对象 new ⼀个实例，通过这个对象的readAsDataURL()⽅法读取file标签获取的图⽚并转换为base64格式，完成之后通过ajax之类的⽅式传到后台。
HTML需要⼀个input type="file" 的标签如果需要预览的话可以再加⼀个img标签<div class="warp"><div class="warp-content">点击上传</div><input type="file" id="file" /></div><img src="" />JS⼀、图⽚上传需要检测上传的图⽚是否变化，所以这⾥选择js的onchange事件.先获取input,img的dom元素,在inputtype=‘file'的demo元素下，有⼀个files属性，⾥⾯是我们上传的⽂件信息，打印⼀下，就可以看到上传⽂件的名字，类型等信息。
var file = document.getElementById('file');var image = document.querySelector("img");file.onchange = function() {var fileData = this.files[0];//这是我们上传的⽂件}⼆、然后运⽤ FileReader 这个对象，FileReader主要⽤于将⽂件内容读⼊内存，通过⼀系列异步接⼝，可以在主线程中访问本地⽂件。
使⽤FileReader对象，web应⽤程序可以异步的读取存储在⽤户计算机上的⽂件(或者原始数据缓冲)内容，可以使⽤File对象或者Blob对象来指定所要处理的⽂件或数据。
js图片上传完整代码
}
//保存上传文件的数据
byte dataBytes[] = new byte[formDataLength];
int byteRead = 0;
int totalBytesRead = 0;
//上传的数据保存在byte数组
while(totalBytesRead < formDataLength){
//out.println(startPos);
//取得文件数据的结束的位置
int endPos = ((file.substring(0,boundaryLocation)).getBytes
()).length;
//out.println(endPos);
//检查上载文件是否存在
File checkFile = new File(fileName);
<%@ page import="javax.servlet.http.*"%>
<html><head><title>upFile</title></head>
<body bgcolor="#ffffff">
<%
//定义上载文件的最大字节
int MAX_SIZE = 102400 * 102400;
<!--类型enctype用multipart/form-data，这样可以把文件中的数据作为流式数据上传，不管是什么文件类型，均可上传。-->
<input type="file" name="upfile" size="15">