jsp+servlet上传和下载
上传：jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ page contentType="text/html;charset=utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ page contentType="text/html;charset=utf-8"%>
<%
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>
<title>文件上传</title>
<script type="text/javascript">
function doUplod(){
var local=document.getElementById("filelocal").value;
if(local!=null || local!=""){
document.getElementById("uploadForm").action="UpLoadFileServlet?fileLocal="+local;
}else{
document.getElementById("uploadForm").action="UpLoadFileServlet";
}
document.getElementById("uploadForm").submit();
}
</script>
</head>
<body>
<br><br>
<center>
<font size="5" color="#ff0000"><b>文件上传</b></font><br>
<form name="uploadForm" id="uploadForm" enctype="multipart/form-data" method="post" action="UpLoadFileServlet">
<table border="0" align="center" cellpadding="2" cellspacing="2" bgcolor="snow">
<tr>
<td>
<div align="center">上传文件:</div>
</td>
<td><div align="center">
<input type="file" name="uploadfile" id="uploadfile" size="25" maxlength="80">
</div></td>
</tr>
<tr>
<td>
<div align="center">存储位置:</div>
</td>
<td><div align="center">
<input type="text" name="filelocal" id="filelocal" size="24" maxlength="80"><font color="red">如：C:\\</font>
</div></td>
</tr>
<tr align="center" width="100%">
<td align="center" colspan="2">
<div align="center">
<input type="button" value="确定">
<input type="reset" value="清除"></div>
</td>
</tr>
<br/>
<tr align="center" width="100%">
<td align="center" colspan="2">
<div align="center">
<font style="font-size: 12px"><a href="load.jsp">转入下载</a></font>
</div>
</td>
</tr>
</table>
</form>
</center>
</body>
</html>
<html>
<head>
<title>文件上传</title>
<script type="text/javascript">
function doUplod(){
var local=document.getElementById("filelocal").value;
if(local!=null || local!=""){
document.getElementById("uploadForm").action="UpLoadFileServlet?fileLocal="+local;
}else{
document.getElementById("uploadForm").action="UpLoadFileServlet";
}
document.getElementById("uploadForm").submit();
}
</script>
</head>
<body>
<br><br>
<center>
<font size="5" color="#ff0000"><b>文件上传</b></font><br>
<form name="uploadForm" id="uploadForm" enctype="multipart/form-data" method="post" action="UpLoadFileServlet">
<table border="0" align="center" cellpadding="2" cellspacing="2" bgcolor="snow">
<tr>
<td>
<div align="center">上传文件:</div>
</td>
<td><div align="center">
<input type="file" name="uploadfile" id="uploadfile" size="25" maxlength="80">
</div></td>
</tr>
<tr>
<td>
<div align="center">存储位置:</div>
</td>
<td><div align="center">
<input type="text" name="filelocal" id="filelocal" size="24" maxlength="80"><font color="red">如：C:\\</font>
</div></td>
</tr>
<tr align="center" width="100%">
<td align="center" colspan="2">
<div align="center">
<input type="button" value="确定">
<input type="reset" value="清除"></div>
</td>
</tr>
<br/>
<tr align="center" width="100%">
<td align="center" colspan="2">
<div align="center">
<font style="font-size: 12px"><a href="load.jsp">转入下载</a></font>
</div>
</td>
</tr>
</table>
</form>
</center>
</body>
</html>
java code：
package com.qingyun.test;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.ProgressListener;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.ProgressListener;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UpLoadFileServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
throws ServletException, IOException {
this.doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//字符编码级设置
request.setCharacterEncoding("gbk");
String fileLocal=request.getParameter("fileLocal");
if (fileLocal.lastIndexOf(" \\")==-1) {
fileLocal=null;
}
try {
DiskFileItemFactory factory = new DiskFileItemFactory();
//设置上传的位置
ServletFileUpload upload = new ServletFileUpload(factory);
boolean rest=upload.isMultipartContent(request);
upload.setHeaderEncoding("UTF-8");
//设置上传的监听器
upload.setProgressListener(new ProgressListener() {
long num = 0;
public void update(long bytesRead, long contentLength, int items) {
long progress = bytesRead*100/contentLength;
if(progress==num){ return;}
num = progress;
System.out.println("上传进度:" + progress + "%");
}
});
if(!rest) {
// 不是文件上传
request.setAttribute("message", "对不起，不是文件上传表单！");
request.getRequestDispatcher("/index.jsp").forward(request, response);
return;
}
List<FileItem> fileItems = upload.parseRequest(request);
File file =null;
for (FileItem item : fileItems) {
if(item.isFormField()) {
String name = item.getFieldName();
String value = item.getString();
// 手工的转换了
value = new String(value.getBytes("iso-8859-1"),"utf-8");
System.out.println(name + "=" + value);
} else {
// 文件上传字段
// 获得文件名
String filename = item.getName();
// 创建文件
if (fileLocal=="" || fileLocal==null) {
//默认路径
file = new File("E:\\"+filename);
}else{
//用户填写的路径
file=new File(fileLocal+filename);
}
file.createNewFile();
// 获得流，读取数据写入文件
InputStream in = item.getInputStream();
FileOutputStream fos = new FileOutputStream(file);
int len;
byte[] buffer = new byte[1024];
while((len=in.read(buffer))>0)
fos.write(buffer,0,len);
fos.close();
in.close();
item.delete(); // 删除临时文件
}
}
} catch (Exception e) {
e.printStackTrace();
request.setAttribute("result", "上传失败，请查找原因，重新再试！");
}
request.getRequestDispatcher("/index.jsp").forward(request, response);
}
throws ServletException, IOException {
//字符编码级设置
request.setCharacterEncoding("gbk");
String fileLocal=request.getParameter("fileLocal");
if (fileLocal.lastIndexOf(" \\")==-1) {
fileLocal=null;
}
try {
DiskFileItemFactory factory = new DiskFileItemFactory();
//设置上传的位置
ServletFileUpload upload = new ServletFileUpload(factory);
boolean rest=upload.isMultipartContent(request);
upload.setHeaderEncoding("UTF-8");
//设置上传的监听器
upload.setProgressListener(new ProgressListener() {
long num = 0;
public void update(long bytesRead, long contentLength, int items) {
long progress = bytesRead*100/contentLength;
if(progress==num){ return;}
num = progress;
System.out.println("上传进度:" + progress + "%");
}
});
if(!rest) {
// 不是文件上传
request.setAttribute("message", "对不起，不是文件上传表单！");
request.getRequestDispatcher("/index.jsp").forward(request, response);
return;
}
List<FileItem> fileItems = upload.parseRequest(request);
File file =null;
for (FileItem item : fileItems) {
if(item.isFormField()) {
String name = item.getFieldName();
String value = item.getString();
// 手工的转换了
value = new String(value.getBytes("iso-8859-1"),"utf-8");
System.out.println(name + "=" + value);
} else {
// 文件上传字段
// 获得文件名
String filename = item.getName();
// 创建文件
if (fileLocal=="" || fileLocal==null) {
//默认路径
file = new File("E:\\"+filename);
}else{
//用户填写的路径
file=new File(fileLocal+filename);
}
file.createNewFile();
// 获得流，读取数据写入文件
InputStream in = item.getInputStream();
FileOutputStream fos = new FileOutputStream(file);
int len;
byte[] buffer = new byte[1024];
while((len=in.read(buffer))>0)
fos.write(buffer,0,len);
fos.close();
in.close();
item.delete(); // 删除临时文件
}
}
} catch (Exception e) {
e.printStackTrace();
request.setAttribute("result", "上传失败，请查找原因，重新再试！");
}
request.getRequestDispatcher("/index.jsp").forward(request, response);
}
}
下载：jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ page contentType="text/html;charset=utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ page contentType="text/html;charset=utf-8"%>
<%
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>
<title>下载文件</title>
<script type="text/javascript">
function downLoad(){
var isIE = (document.all) ? true : false;
var isIE7 = isIE && (navigator.userAgent.indexOf('MSIE 7.0') != -1);
var isIE8 = isIE && (navigator.userAgent.indexOf('MSIE 8.0') != -1);
var file=document.getElementById("uploadfile");
if(isIE7 || isIE8)
{
file.select();
var path=document.selection.createRange().text;
document.selection.empty();
}
document.getElementById("download").href="DownLoadServlet?fileName="+path;
}
</script>
</head>
<body>
<br><br><center>
<font size="5" color="#ff0000"><b>下载文件</b></font><br>
<table border="0" align="center" cellpadding="2" cellspacing="2" bgcolor="snow">
<tr>
<td>
<div align="center">
<input type="file" name="uploadfile" id="uploadfile" size="25" maxlength="80">
</div>
</td>
</tr>
<tr align="center" width="100%">
<td align="center" colspan="2">
<div align="center">
<a href="" id="download" onclick="downLoad()">下载</a>
</td>
</tr>
<br/>
<tr align="center" width="100%">
<td align="center" colspan="2">
<div align="center">
<font style="font-size: 12px"><a href="index.jsp">转入上传</a></font>
</div>
</td>
</tr>
</table>
</center>
</body>
</html>
<html>
<head>
<title>下载文件</title>
<script type="text/javascript">
function downLoad(){
var isIE = (document.all) ? true : false;
var isIE7 = isIE && (navigator.userAgent.indexOf('MSIE 7.0') != -1);
var isIE8 = isIE && (navigator.userAgent.indexOf('MSIE 8.0') != -1);
var file=document.getElementById("uploadfile");
if(isIE7 || isIE8)
{
file.select();
var path=document.selection.createRange().text;
document.selection.empty();
}
document.getElementById("download").href="DownLoadServlet?fileName="+path;
}
</script>
</head>
<body>
<br><br><center>
<font size="5" color="#ff0000"><b>下载文件</b></font><br>
<table border="0" align="center" cellpadding="2" cellspacing="2" bgcolor="snow">
<tr>
<td>
<div align="center">
<input type="file" name="uploadfile" id="uploadfile" size="25" maxlength="80">
</div>
</td>
</tr>
<tr align="center" width="100%">
<td align="center" colspan="2">
<div align="center">
<a href="" id="download" onclick="downLoad()">下载</a>
</td>
</tr>
<br/>
<tr align="center" width="100%">
<td align="center" colspan="2">
<div align="center">
<font style="font-size: 12px"><a href="index.jsp">转入上传</a></font>
</div>
</td>
</tr>
</table>
</center>
</body>
</html>
java code：
package com.qingyun.test;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class DownLoadServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/*
* 处理请求 (non-Javadoc)
* @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest ,
* javax.servlet.http.HttpServletResponse)
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
throws ServletException, IOException {
doPost(request, response);
}
/*
* 处理请求 (non-Javadoc)
* @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest ,
* javax.servlet.http.HttpServletResponse)
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 接收中文参数乱码处理
response.setCharacterEncoding("utf-8");
String fileName = new String(request.getParameter("fileName").getBytes("ISO-8859-1"), "utf-8");
System.out.println("文件的路径是："+fileName);
// 得到文件名
// 设置为下载application/x-download
response.setContentType("application/x-download");
// 下载文件时显示的文件保存名称
String filenamedisplay = fileName;
// 中文编码转换
filenamedisplay = URLEncoder.encode(filenamedisplay, "UTF-8");
response.addHeader("Content-Disposition", "attachment;filename="+ filenamedisplay);
try {
OutputStream os = response.getOutputStream();
FileInputStream fis = new FileInputStream(
fileName);
byte[] b = new byte[1024];
int i = 0;
while ((i = fis.read(b)) > 0) {
os.write(b, 0, i);
}
fis.close();
os.flush();
os.close();
} catch (Exception e) {
response.setCharacterEncoding("utf-8");
String fileName = new String(request.getParameter("fileName").getBytes("ISO-8859-1"), "utf-8");
System.out.println("文件的路径是："+fileName);
// 得到文件名
// 设置为下载application/x-download
response.setContentType("application/x-download");
// 下载文件时显示的文件保存名称
String filenamedisplay = fileName;
// 中文编码转换
filenamedisplay = URLEncoder.encode(filenamedisplay, "UTF-8");
response.addHeader("Content-Disposition", "attachment;filename="+ filenamedisplay);
try {
OutputStream os = response.getOutputStream();
FileInputStream fis = new FileInputStream(
fileName);
byte[] b = new byte[1024];
int i = 0;
while ((i = fis.read(b)) > 0) {
os.write(b, 0, i);
}
fis.close();
os.flush();
os.close();
} catch (Exception e) {
}
}
}
}
}
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns=" http://java.sun.com/xml/ns/javaee"
xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=" http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>UpLoadFileServlet</servlet-name>
<servlet-class>com.qingyun.test.UpLoadFileServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UpLoadFileServlet</servlet-name>
<url-pattern>/UpLoadFileServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>DownLoadServlet</servlet-name>
<servlet-class>com.qingyun.test.DownLoadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DownLoadServlet</servlet-name>
<url-pattern>/DownLoadServlet</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
<web-app version="2.5"
xmlns=" http://java.sun.com/xml/ns/javaee"
xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=" http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>UpLoadFileServlet</servlet-name>
<servlet-class>com.qingyun.test.UpLoadFileServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UpLoadFileServlet</servlet-name>
<url-pattern>/UpLoadFileServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>DownLoadServlet</servlet-name>
<servlet-class>com.qingyun.test.DownLoadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DownLoadServlet</servlet-name>
<url-pattern>/DownLoadServlet</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
注意：是在j2se5 上 . 有包：commons-fileupload-1.2.1.jar ；commons-io-1.3.2.jar