Download files with Chinese names

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>下载页面</title>
</head>
<body>
<a href="/day15/img/九尾.jpg">图片1</a>
<a href="/day15/img/1.avi">视屏</a>
<hr/>
<a href="/day15/downloadServlet?filename=九尾.jpg">图片1</a>
<a href="/day15/downloadServlet?filename=1.avi">Screen </ HTML></ body></a>

package com.hopetesting.web.utils;

import sun.misc.BASE64Encoder;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;


public class DownLoadUtils {

 public static String getFileName(String agent, String filename) throws UnsupportedEncodingException {
 if (agent.contains("MSIE")) {
 // IE浏览器
 filename = URLEncoder.encode(filename, "utf-8");
 filename = filename.replace("+", " ");
 } else if (agent.contains("Firefox")) {
 // 火狐浏览器
 BASE64Encoder base64Encoder = new BASE64Encoder();
 filename = "=?utf-8?B?" + base64Encoder.encode(filename.getBytes("utf-8")) + "?=";
 } else {
 // 其它浏览器
 filename = URLEncoder.encode(filename, "utf-8");
 }
 return filename;
 }
}

package com.hopetesting.web.download;

import com.hopetesting.web.utils.DownLoadUtils;
import sun.management.Agent;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileInputStream;
import java.io.IOException;

/**
 * @author newcityman
* @Date 2019/9/2 - 0:05 
* / 
@WebServlet ( "/ downloadServlet") 
public class DownloadServlet the extends the HttpServlet { 
 protected void the doPost (the HttpServletRequest Request , the HttpServletResponse Response) throws ServletException , IOException { 
//. 1, the parameter acquisition request , the file name 
String filename = request.getParameter ( "filename") ; 
// 2, using the file input stream of bytes loaded into memory 
// 2.1, the file path to find 
the ServletContext context = request.getServletContext () ; 
String realpath = context.getRealPath ( "/ IMG /" + filename) ; 
// 2.2, the byte stream associated with 
FIS = the FileInputStream new new the FileInputStream (realpath); 
// 3, is provided in response to the first response 
// 3.1-type information Content 
String mimeType = context.getMimeType (filename) ; 
response.setHeader ( "Content-type" , mimeType) ; 
// 3.2 setting response content-disposition header 
// Chinese document processing garbled 
// Get user-agent request-header 
String = request.getHeader Agent ( "user-agent") ; 
// encoding method using the utility class name of the file 
filename = DownLoadUtils. getFileName (Agent , filename ) ; 
response.setHeader ( "Content-Disposition" , "Attachment; filename =" + filename) ; 
//. 4, the input data stream is written to the output stream 
the ServletOutputStream response.getOutputStream SOS = () ; 
int len =0;
 byte[] buff = new byte[1024*8];
 while( (len=fis.read(buff))!=-1){
 sos.write(buff,0,len);
 }
 fis.close();
 }

 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 this.doPost(request, response);
 }
}

Download files with Chinese names

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