Javaweb14 解决中文下载乱码问题
package com.itheima.content;
import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.net.URLEncoder; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import sun.misc.BASE64Encoder; public class DownloadServlet2 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获取要下载文件的名称 String filename = request.getParameter("filename"); //解决获得中文参数的乱码 filename = new String(filename.getBytes("ISO8859-1"),"UTF-8"); //获得请求头中的User-Agent String agent = request.getHeader("User-Agent"); // 根据不同浏览器进行不同的编码 String filenameEncoder = ""; if (agent.contains("MSIE")) { // IE浏览器 filenameEncoder = URLEncoder.encode(filename, "utf-8"); filenameEncoder = filenameEncoder.replace("+", " "); } else if (agent.contains("Firefox")) { // 火狐浏览器 BASE64Encoder base64Encoder = new BASE64Encoder(); filenameEncoder = "=?utf-8?B?" + base64Encoder.encode(filename.getBytes("utf-8")) + "?="; } else { // 其它浏览器 filenameEncoder = URLEncoder.encode(filename, "utf-8"); } //要下载的这个文件的类型---客户端能过文件的MIME类型去区分类型 response.setContentType(this.getServletContext().getMimeType(filename)); //告诉客户端该 文件不是直接解析而是以附件形式打开（下载） response.setHeader("Content-Disposition", "attachment;filename="+filenameEncoder); //获取文件的绝对路径 String path = this.getServletContext().getRealPath("download/"+filename); //获取该文件的输入流 InputStream in = new FileInputStream(path); //获取输出流---通过response获取的输出流用于向客户端写内容 ServletOutputStream out = response.getOutputStream(); //文件拷贝的模板代码 int len = 0; byte[] buffer = new byte[1024]; while((len=in.read(buffer))>0){ out.write(buffer, 0, len); } in.close(); out.close(); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }