通过JQuery中的AJAX函数来实现文档的上传,压缩,下载

来源：互联网发布：数控镗床编程案例编辑：程序博客网时间：2024/05/16 06:01

1. 文档上传的一个简单界面 docUpload.jsp：

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP 'docUpload.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><mce:script type="text/javascript" src="resources/jquery.js" mce_src="resources/jquery.js"></mce:script> <mce:script type="text/javascript" src="resources/upload/fileUploadUtil.js" mce_src="resources/upload/fileUploadUtil.js"></mce:script><mce:script type="text/javascript" src="resources/ajaxfileupload.js" mce_src="resources/ajaxfileupload.js"></mce:script> </head> <mce:script type="text/javascript"></mce:script> <body> <form action="#"> <table id="upload" border="1"> <tr> <td width="20%">序号</td> <td width="30%">名字</td> <td width="50%">路径</td> <td width="20%">状态</td> </tr> <tr> <td>1</td> <td>111</td> <td><input type="file" name="newfile" onchange="checkFile(this);"></input></td> <td><p id="flag1">正常</p></td> </tr> </table> <input type="submit" value="确定" id="test"></input> </form> </body></html>

2. fileUploadUtil.js 为上传下载文档都需要引入的JS

/** * 定义全局变量 */var uploadFileSize = ""; // 定义文档内容的大小var checkFileFlag = false; //文件是否已经检查的标志var fileCount = -1; var paramterUrl = ""; //定义传递到后台的参数function uploadFile() { //对上传框内的内容进行判断 if(checkFileFlag == false) { checkFileFlag = true; var flag = checkFilePath(); if(flag) { alert("/u6587/u4ef6/u5730/u5740/u4e0d/u80fd/u4e3a/u7a7a!"); checkFileFlag = false; return; } } fileCount++; var fileId = ""; var filePath = ""; //这边是每次都对对应的需要上传的文档进行过滤 $(":file[id*='uploadFileName']").each(function(i){ if(i == fileCount) { fileId = $(this).attr("id"); filePath = $(this).val(); } }); if(filePath == null || filePath == "") { return; } else { $("p[id*='showName']").each(function(i){ if(i == fileCount) { $(this).text("/u6587/u4ef6/u4e0a/u4f20/u4e2d/u3002/u3002/u3002/u3002/u3002"); $("#test").attr("disabled","disabled"); //后面执行上传文件的动作,调用后台的Servlet doUploadFile(filePath,fileId); } }); }}/** * 执行上传文件的动作 */function doUploadFile(filePath,fileId) { //获得上传文件的文件名 var paths = filePath.split("//"); var fileName = paths[paths.length - 1]; //定义传递到后台的参数 //paramterUrl = "name=lin&age=20"; var url = "/AJAX/servlet/FileUploadServlet?" + "name=linwei1111"; url = encodeURI(encodeURI(url)); //下面开始调用Servlet传递文件流到后台，下面是在ajaxfileupload.js文件中的，，就已经有enctype设置了。 //var form = $('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>'); $.ajaxFileUpload({ type:"POST", secureuri:false, //**文件上传空间的id属性,这边需要写入对应的上传文件的fileId fileElementId:fileId, dataType:"json", url: url, //data:{name:'linwei',age:'20'}, success:function(data){ if(data.status == "success") { $("p[id*='showName']").each(function(i){ if(i == fileCount) { $(this).text("/u4e0a/u4f20/u6210/u529f"); } }); } else { $("p[id*='showName']").each(function(i){ if(i == fileCount) { $(this).text("/u4e0a/u4f20/u5931/u8d25"); } }); } gotoNextUpload(); }, error:function(xhr,status,err) { alert("/u51fa/u9519/u4e86/u3002"); gotoNextUpload(); } });}/** * 跳转到下一个页面，判断是否继续上传文档 */function gotoNextUpload() { //获取上传文档的数量 var size = $(":file[id*='uploadFileName']").size(); if(fileCount<size-1) { uploadFile(); } else { $("#test").removeAttr("disabled"); }}/** * 检查文档路径是否为空 */function checkFilePath() { var flag = false; $("input[name*='a']").each(function(i){ if($(this).val() == null || $(this).val() == "") { flag = true; return flag; } }); return flag; }/** * 文档上传之前，对上传的文档内容进行检查。(检查内容包括：文档后缀，文档大小等) */function checkFile(obj) { //根据文档路径是否存在进行判断 if(obj.value.length>0) { //定义可以上传的文档类型 var af = "jpg,gif,png,zip,rar,txt,doc,htm,pdf,xls"; if (eval("with(obj.value)if(!/" + af.split(",").join("|")+ "/ig.test(substring(lastIndexOf('.')+1,length)))1;")) {alert("/u5141/u8bb8/u4e0a/u4f20/u7684/u6587/u6863/u7c7b/u578b/u4e3a:/n" + af);//清楚文件上传框中的内容obj.outerHTML = obj.outerHTML;} else {checkFileSize(obj);} }}/** * 检查文档内容的大小 */function checkFileSize(obj) { if (!getFileSize(obj.value)) { obj.outerHTML = obj.outerHTML; alert("/u4e0a/u4f20/u6587/u4ef6/u5927/u5c0f/u8bf7/u52ff/u5927/u4e8e"+parseInt(Number(uploadFileSize)/(1000*1000))+"M"); }}/** * 取得上传文档的大小 */function getFileSize(filePath) { var fileSize = "-1"; //通过Img对象装载，这个可以是可以，但是浏览器有严格限制，现在最主流的浏览器都是ie内核的， //ie7和ie8的在装载Img对象是用dynsrc装载不了，只有ie6可以，这可能跟内核有关系。 var image = new Image(); image.dynsrc = filePath; fileSize = image.fileSize; //另外一种方式获取文件大小的 //var fso,f; //fso=new ActiveXObject("Scripting.FileSystemObject"); //f=fso.GetFile(filePath); //var fileSize = f.size ; if(Number(fileSize)<Number(uploadFileSize)) { return true; } else { return false; }}//=============================================================/** * 页面载入后先执行的动作 */$(document).ready(function(){ //对页面的文件进行ID的编排 $(":file").each(function(i){var thisFileId = i + "uploadFileName";//alert("a is " + thisFileId); $(this).attr("id",thisFileId); }); //对页面的显示内容进行ID的编排 $("p[id*='flag']").each(function(i){ var thisShowId = i + "showName"; //alert("b is " + thisShowId); $(this).attr("id",thisShowId); }); });//=============================================================//页面调用文档函数function doFileDown(id) { var url = "http://localhost:8080/AJAX/servlet/fileDownload?id=" + id; $("#" + id).attr("href",url); $("#" + id).click(function(){ alert($(this).attr("href")); }); }

3. FileUploadServlet.java 是上传的Servlet

package upload;import java.io.IOException;import java.io.PrintWriter;import java.util.HashMap;import java.util.Map;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileUploadException;import service.JsonUtil;public class FileUploadServlet extends HttpServlet {Map map = new HashMap();/** * Constructor of the object. */public FileUploadServlet() {super();}/** * Destruction of the servlet. <br> */public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here}/** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {System.out.println("in doGet."); response.setContentType("text/html; charset=UTF-8");PrintWriter out = response.getWriter();out.println("<!DOCTYPE HTML PUBLIC /"-//W3C//DTD HTML 4.01 Transitional//EN/">");out.println("<HTML>");out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");out.println(" <BODY>");out.print(" This is ");out.print(this.getClass());out.println("in doGet method, using the GET method");out.println(" </BODY>");out.println("</HTML>");out.flush();out.close();}/** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to * post. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//System.out.println("in doPost.");// response.setContentType("text/html; charset=UTF-8");// PrintWriter out = response.getWriter();// String test = request.getParameter("name");// System.out.println("test is " + test);//// String test1 = request.getParameter("age");// System.out.println("test1 is " + test1);FileOperation fo = new FileOperation(); try {DocumentVO documentVO = fo.doWriteFile(request);//这边把序列号记录到记录文件中fo.logSequenceNumber(documentVO);} catch (FileUploadException e) {// TODO Auto-generated catch blocke.printStackTrace();//这边取消记录文件中的序列号try {fo.getLogFile();} catch (Exception e1) {// TODO Auto-generated catch blocke1.printStackTrace();}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();//这边取消记录文件中的序列号try {fo.getLogFile();} catch (Exception e1) {// TODO Auto-generated catch blocke1.printStackTrace();}} // 向客户端添加返回的标志String status = "success";map.put("status", status);this.doCallbackMethod(request, response);}/** * Initialization of the servlet. <br> * * @throws ServletException * if an error occurs */public void init() throws ServletException {// Put your code here}/** * 通过返回字段的设置,向客户端返回相应的信息,客户端通过回调方法获得信息后处理 * * @param request * @param response * @throws IOException */private void doCallbackMethod(HttpServletRequest request,HttpServletResponse response) {PrintWriter writer = null;try {writer = response.getWriter();// FormatForJSON f = new FormatForJSON();// String json = f.object2json(map);JsonUtil json = JsonUtil.getInstanceFactory();json.fromObject(map);System.out.println("json is " + json.getResult());writer.print(json.getResult());writer.flush();writer.close();} catch (IOException e) {e.printStackTrace();} finally {if (writer != null)writer.close();}}}

4. FileOperation.java 是文档的操作类

package upload;import java.io.BufferedReader;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileReader;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Calendar;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;import javax.servlet.http.HttpServletRequest;import org.apache.commons.fileupload.DiskFileUpload;import org.apache.commons.fileupload.FileItem;import doc.util.ZipUtil;/** * 文档操作类 * @author linwei * */public class FileOperation {/** * 文档的写入方法 * @param request * @throws Exception */public DocumentVO doWriteFile(HttpServletRequest request) throws Exception {//DiskFileUpload是commom-fileupload.jar包中的类DiskFileUpload diskFileUpload = new DiskFileUpload();//设置上传文件的大小,默认大小为100MdiskFileUpload.setSizeMax(new Long(102400000)); //设置缓冲大小 diskFileUpload.setSizeThreshold(4096);//设置编码方式 diskFileUpload.setHeaderEncoding("GBK"); diskFileUpload.setHeaderEncoding("gb2312"); //解析请求，返回一个集合 List fileItem = diskFileUpload.parseRequest(request); if(fileItem.size() == 0) { System.out.println("数量为0."); } //这边是分别获取到每个的上传文件 Iterator it = fileItem.iterator(); //这边是循环每个文件，获取到每个文件下的属性,即FileItem对象 List list = null; Map map = null; DocumentVO documentVO = null; File file = null; while(it.hasNext()) { FileItem fi = (FileItem)it.next(); //这边获取文件流 InputStream in = fi.getInputStream(); if(in == null) { System.out.println("流是空的。"); } //这边开始处理文件 //如果是普通表单对象，则返回true，如果是文件表单字段，则返回false if(!fi.isFormField()) { list = new ArrayList(); map = new HashMap(); //返回的文件名包括客户机路径 String filePath = fi.getName(); String fileName = this.getFileName(filePath); String fileType = fileName.substring(fileName.lastIndexOf(".") + 1); fileName = fileName.substring(0,fileName.lastIndexOf(".")); documentVO = new DocumentVO(); documentVO.setFileName(fileName); documentVO.setFileType(fileType); documentVO = this.getSequenceNumber(documentVO); System.out.println("fileName is " + fileName); list.add(in); //for test// file = new File("D://Workspace//DocumentUpload//","linwei.txt");// fi.write(file); //for test } } //开始调用上传文档方法 return this.upload(documentVO, list);}/** * 上传文档的操作类 * @param documentVO * @param list * @throws Exception */private DocumentVO upload(DocumentVO documentVO,List list) throws Exception {if(documentVO == null || "".equals(documentVO)) { throw new Exception("documentVO 不能为空！"); }if(list == null || list.size() == 0) { throw new Exception("没有文件流。");}InputStream in = (InputStream)list.get(0); return this.transferDocument(documentVO, in);}/** * 传输物理文件 * @param documentVO * @param in * @return */private DocumentVO transferDocument(DocumentVO documentVO,Object bytesStream) { //这边先写死了一个路径，正确的应该是写在配置文件中的String path = "D://Workspace//DocumentUpload//";//**********************************************//这边传递的文件不能是路径，必须是已经拼装好的文件具体地址了String fileAbsolutePath = path + documentVO.getSequenceNumber();if(bytesStream instanceof InputStream) {//开始进行压缩ZipUtil zipUtil = new ZipUtil();Map map = new HashMap();//这边传递的压缩文件的名字最好是文件的全名map.put(documentVO.getFileName()+"."+documentVO.getFileType(), (InputStream)bytesStream);try {zipUtil.zip(fileAbsolutePath, map);System.out.println("OK");} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace(); //如果出错了的话，就用常规的文件保存方式 this.write((InputStream)bytesStream, fileAbsolutePath,documentVO);} } else {this.write((OutputStream)bytesStream, fileAbsolutePath,documentVO);}//这边把序列号作为名字参数传递出去return documentVO;}/** * 取得存储时候的文件名，最后也是根据这个名字去数据库中查询的 * @param fileName * @return */private DocumentVO getSequenceNumber(DocumentVO documentVO) {//这边文件名字(fileName)传递进来以便后面可以使用Calendar c = Calendar.getInstance();SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");documentVO.setSequenceNumber(dateFormat.format(c.getTime()));return documentVO;}/** * 从路径中取得文件名 * @param fileName * @return */private String getFileName(String filePath) { int pos = filePath.lastIndexOf(File.separator);//System.out.println("File.separator is " + File.separator); if(pos > 0) { //position为该字符串最右边出现的位置,substring(number)获取到该位置之后的字符串 return filePath.substring(pos + 1); } else { return filePath; }}/** * 把输入流对象持久化 * @param in */public void write(InputStream in,String absolutePath,DocumentVO documentVO) {FileOutputStream file = null;try {// 检查文件路径this.checkFile(new File(absolutePath));absolutePath = absolutePath + "//" + documentVO.getFileName() + "." + documentVO.getFileType(); file = new FileOutputStream(absolutePath);int length = 0;byte[] buffer = new byte[10240];while ((length = in.read(buffer, 0, 10240)) > -1) {file.write(buffer, 0, length);}} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {try {if (in != null)in.close();if (file != null)file.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}/** * 把输出流对象持久化 * @param in */public void write(OutputStream out,String absolutePath,DocumentVO documentVO) {FileOutputStream file = null;try {// 检查文件路径this.checkFile(new File(absolutePath));absolutePath = absolutePath + "//" + documentVO.getFileName() + "." + documentVO.getFileType(); file = new FileOutputStream(absolutePath);ByteArrayOutputStream baos = (ByteArrayOutputStream)out; file.write(baos.toByteArray());} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {try {if (out != null)out.close();if (file != null)file.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}/** * 检查文件的路径是否存在，如果不存在则创建该路径，以便创建该文件 * * @param file */private void checkFilePath(File file) {this.checkFile(file.getParentFile());}/** * 检查路径 * @param file * 路径的最后一个节点，如C:/1/2/3/d.file 则将该File对象的.getParentFile传入即C:/1/2/3 */private void checkFile(File file) { //如果该文件对象不存在if(!file.exists()) {//如果文件对象不存在，则继续查询其父类的文件对象，并创建目录this.checkFilePath(file.getParentFile());file.mkdir();}}/** * 这边记录已上传文件的序列号 * @param documentVO * @throws Exception */public void logSequenceNumber(DocumentVO documentVO) throws Exception {if(documentVO != null && !"".equals(documentVO)) { if(documentVO.getSequenceNumber() != null && !"".equals(documentVO.getSequenceNumber())) { String sequenceNumber = documentVO.getSequenceNumber() + ","; this.logSeqToFile(sequenceNumber); }}}/** * 把传递进来的序列号加入到文件的最后端，按照英文状态下的,分隔 * @param sequenceNumber * @throws IOException */private void logSeqToFile(String sequenceNumber) throws IOException { //这边先写死了一个路径，正确的应该是写在配置文件中的String path = "D://Workspace//DocumentUpload//node.txt";File file = new File(path);FileOutputStream out = new FileOutputStream(file,true); byte[] byte1 = new byte[512];int b = sequenceNumber.length(); //这边需要写入字节out.write(sequenceNumber.getBytes()); out.close();}/** * 读取记录文件中的内容并返回 * @return * @throws Exception */public String getLogFile() throws Exception {String str = "";//这边先写死了一个路径，正确的应该是写在配置文件中的String path = "D://Workspace//DocumentUpload//node.txt";File file = new File(path);BufferedReader b = new BufferedReader(new FileReader(file));String i;while((i = b.readLine()) != null) {str += i;}return str;}}

5. 文档压缩类 ZipUtil

package doc.util;import java.io.FileOutputStream;import java.io.InputStream;import java.util.Iterator;import java.util.Map;import java.util.Set;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipOutputStream;/** * 对文档进行压缩的类 * @author linwei * */public class ZipUtil {// 要压缩文件的最大值public final static long maxSize = 100000000;// 这个可以配置到配置文件中 100MBpublic final static int BUFFERSIZE = 2048 ; //private static final ThreadLocal currentZipName = new ThreadLocal();/** * 根据输出路径对文件流进行压缩输出 * @param fileOutPath * @param mapInputStreams * @throws Exception */public void zip(String fileOutPath, Map mapInputStreams) throws Exception {if (fileOutPath == null || "".equals(fileOutPath)) {return;}if (mapInputStreams != null && mapInputStreams.size() > 0) { Set entrys = mapInputStreams.entrySet();FileOutputStream out = new FileOutputStream(fileOutPath);//Java压缩专用类ZipOutputStream zip = new ZipOutputStream(out);String fileName = null;InputStream inputStream = null;Iterator it = entrys.iterator();while (it.hasNext()) {Map.Entry entry = (Map.Entry) it.next();fileName = (String) entry.getKey();inputStream = (InputStream) entry.getValue();zip(zip, inputStream, fileName);}zip.close();}}/** * 压缩文件 * @param out * @param inputStream * @param fileName * @throws Exception */private void zip(ZipOutputStream out, InputStream inputStream,String fileName) throws Exception { //for test /*File file1 = new File("D://Workspace//DocumentUpload//","test.txt"); BufferedOutputStream out1 = new BufferedOutputStream(new FileOutputStream(file1)); int b; byte[] buf = new byte[2048]; while((b = inputStream.read(buf)) != -1) { out1.write(buf); } //注意，这边三点最好全部都写完整，要不会出问题 //将缓冲区中的数据全部写出。 out1.flush(); inputStream.close(); out1.close();*/ //for test//开始写入新的 ZIP 文件条目并将流定位到条目数据的开始处//**********************************************//这边请注意，ZipOutputStream和ZipEntry都请用org.apache.tools.zip包下的类，//这样就可以解决压缩文件名乱码的问题了。out.putNextEntry(new org.apache.tools.zip.ZipEntry(fileName));int b1;byte[] buf1 = new byte[BUFFERSIZE];while ((b1 = inputStream.read(buf1)) != -1) {out.write(buf1, 0, b1);}if (inputStream != null) {inputStream.close();inputStream = null;}}}

6. 文档的实体类 DocumentVO

package upload;/** * 用来传递参数的 * @author linwei * */public class DocumentVO {private String fileName;private String sequenceNumber;private String fileType;public String getFileName() {return fileName;}public void setFileName(String fileName) {this.fileName = fileName;}public String getSequenceNumber() {return sequenceNumber;}public void setSequenceNumber(String sequenceNumber) {this.sequenceNumber = sequenceNumber;}public String getFileType() {return fileType;}public void setFileType(String fileType) {this.fileType = fileType;}}

7. 文档调阅界面

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%@ page import="upload.*" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP 'docUpload.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><mce:script type="text/javascript" src="resources/jquery.js" mce_src="resources/jquery.js"></mce:script><mce:script type="text/javascript" src="resources/upload/fileUploadUtil.js" mce_src="resources/upload/fileUploadUtil.js"></mce:script> </head> <body> <% FileOperation f = new FileOperation(); String str = f.getLogFile(); String[] s = str.split(","); %> <form action="" name="form1"> <table id="upload" border="1"> <tr> <td width="20%">文档连接</td> </tr> <% for(int i=0;i<s.length;i++) { %> <tr> <td><a href="/AJAX/servlet/fileDownload?id=<%=s[i]%>"><%=s[i] %></a></td> </tr> <% } %> </table> </form> </body></html>

8. 调阅Servlet

package upload;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import javax.servlet.ServletException;import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * 文档下载服务类 * @author linwei * */public class fileDownload extends HttpServlet {/** * Constructor of the object. */public fileDownload() {super();}/** * Destruction of the servlet. <br> */public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here}/** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {System.out.println("doGet");this.doDownload(request, response);}/** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException { System.out.println("doPost");this.doDownload(request, response);}/** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */public void init() throws ServletException {// Put your code here}/** * 此方法被doPost和doGet方法调用,用来统一调用文档 * @param request * @param response * @throws ServletException * @throws IOException */public void doDownload(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException{InputStream in = null;response.setContentType("application/x-download; charset=gb2312"); //取得文件分割符String file_separator = System.getProperty( "file.separator" );//这边自己假设一个显示的文件名String displayname = "temp111.zip"; //这边路径也是先写死的，后面可以改 String path = "D://Workspace//DocumentUpload//" + request.getParameter("id");response.addHeader("Content-Disposition","attachment;filename=" + new String(displayname.getBytes("gb2312"),"iso-8859-1")); try {in = new FileInputStream(path);this.downLoad(in, response);} catch(Exception e) {} finally { if(in != null) in.close();}}/** * write file stream to servlet output stream * @param is * @param response * @throws Exception */private void downLoad(InputStream in, HttpServletResponse response) throws Exception {BufferedInputStream bufferInput = new BufferedInputStream(in); ServletOutputStream out = null; try { byte[] buffer = new byte[10240]; out = response.getOutputStream(); int len; while((len = bufferInput.read(buffer)) != -1) { out.write(buffer, 0, len); } out.flush(); response.setStatus(response.SC_OK); response.flushBuffer(); } catch(Exception e) { throw e; } finally { if (out != null) { out.close(); } if (bufferInput != null) { bufferInput.close(); } if (in != null) { in.close(); } }}}

以上只是一些简单的过程，具体的一些信息还是需要按照不同的需求进行修改的。