1、項目目錄結構
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2、index.jsp代碼
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="${pageContext.request.contextPath}/DownLoadServlet">下載</a>
</body>
</html>
3、servlet代碼
package com.neuedu.servlet;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import javax.servlet.ServletContext;
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 org.apache.commons.io.IOUtils;
@WebServlet("/DownLoadServlet")
public class DownLoadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
ServletContext servletContext = request.getServletContext();
String fileName = "風吹麥浪.mp3";
String path = servletContext.getRealPath("/WEB-INF/"+fileName);
File file = new File(path);
String type = servletContext.getMimeType(path);
//1.創建輸入流
InputStream in = new FileInputStream(file);
//
response.setContentType(type);
fileName = new String(fileName.getBytes("gbk"),"iso8859-1");
response.setHeader("Content-Disposition","attachment;filename="+fileName);
PrintWriter out = response.getWriter();
IOUtils.copy(in, out);
}
}
