文件下载

所有格式的文件下载

package com.xu.bean;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class DownloadFile extends HttpServlet{    /** *  */private static final long serialVersionUID = 1L;public void downloadFile(HttpServletResponse response, HttpServletRequest request){      String filePath = request.getParameter("FILE_PATH");//D:\guildFile\adviceNote_1493028164967_Jellyfish.jpgString fileName = request.getParameter("FILE_NAME");//  /adviceNote_1493028164967_Jellyfish.jpgfileName = fileName.substring(1, fileName.length());BufferedInputStream bis = null;        BufferedOutputStream bos = null;        try {            String finalPath = filePath;            File file = new File(finalPath);            if (file.exists() && file.isFile()) {                byte[] buff = new byte[1024];                long fileLength = new File(finalPath).length();                response.setContentType("multipart/form-data");                response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + URLEncoder.encode(fileName, "UTF-8") + ";filename=\"" + URLEncoder.encode(fileName, "UTF-8") + "\"");                response.setHeader("Content-Length", String.valueOf(fileLength));                bis = new BufferedInputStream(new FileInputStream(finalPath));                bos = new BufferedOutputStream(response.getOutputStream());                int bytesRead;                while ((bytesRead = bis.read(buff, 0, buff.length)) != -1) {                    bos.write(buff, 0, bytesRead);                }            } else {                System.out.println("文件不存在");            }        } catch (UnsupportedEncodingException e) {        } catch (FileNotFoundException e) {        } catch (IOException e) {        } finally {            if (bis != null) {                try {                    bis.close();                } catch (IOException e) {                }            }            if (bos != null) {                try {                    bos.close();                } catch (IOException e) {                }            }        }    }}