<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<servlet>
<servlet-name>DownloadServlet</servlet-name>
<servlet-class>com.zr.uploaddownload.servlet.DownloadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DownloadServlet</servlet-name>
<url-pattern>/downloadServlet</url-pattern>
</servlet-mapping>
</web-app>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>test download</title>
</head>
<body>
<a href="downloadServlet">下载</a>
</body>
</html>
package com.zr.uploaddownload.servlet;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class DownloadServlet extends HttpServlet{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
try {
req.setCharacterEncoding("utf-8");
resp.setCharacterEncoding("utf-8");
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
// 设置
resp.setContentType("application/x-msdownload");
try {
resp.setHeader("Content-Disposition", "attachment;filename="+java.net.URLEncoder.encode("我爱罗.jpg","utf-8"));
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
//被下载文件的路径
String sourcePath = "C:\Users\Administrator\Desktop\我爱罗.jpg";
File file = new File(sourcePath);
FileInputStream fis = null;
ServletOutputStream sos = null;
try {
fis = new FileInputStream(file);
try {
sos = resp.getOutputStream();
byte[] b = new byte[1024];
int i;
while ((i=fis.read(b))!=-1) {
sos.write(b, 0, i);
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}finally{
if (fis!=null) {
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}