<!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">视屏</a></body></html>
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 extends HttpServlet {protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// 1、 获取请求参数，文件名称 String filename = request.getParameter("filename");// 2、 使用字节输入流加载文件进内存// 2.1、找到文件路径 ServletContext context = request.getServletContext(); String realPath = context.getRealPath("/img/" + filename);// 2.2、用字节流关联 FileInputStream fis = new FileInputStream(realPath);// 3、设置response的响应头// 3.1信息content-type String mimeType = context.getMimeType(filename); response.setHeader("content-type",mimeType);// 3.2设置响应头信息content-disposition //处理中文文件名乱码问题// 获取user-agent请求头 String agent = request.getHeader("user-agent");// 使用工具类方法编码文件名即可 filename= DownLoadUtils.getFileName(agent, filename); response.setHeader("content-disposition","attachment;filename="+filename);// 4、将输入流的数据写出到输出流中 ServletOutputStream sos = response.getOutputStream(); 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); }}
转载于:https://www.cnblogs.com/newcityboy/p/11444417.html
相关资源：常用中文姓名库.rar （txt格式）
