下载工具类

ゞ浴缸里的玫瑰 2022-10-26 14:12 234阅读 0赞

package com.hisense.cis.test;
    
    import javax.servlet.ServletOutputStream;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.MalformedURLException;
    import java.net.URL;
    import java.net.URLConnection;
    import java.nio.charset.StandardCharsets;
    import java.time.LocalDateTime;
    
    public class Down2 {
        public static  void  httpDownload(HttpServletRequest request, HttpServletResponse response,String httpUrl) {
            System.out.println("下载"+httpUrl);
            // 1.下载网络文件
            ServletOutputStream out = null;        int byteRead;
            URL url=null;
            try {
                url = new URL(httpUrl);
            } catch (MalformedURLException e1) {
                e1.printStackTrace();
               // return false;
            }
            try {
                //2.获取链接
                URLConnection conn =url.openConnection();            //3.输入流
                InputStream inStream = conn.getInputStream();            String downloadfilename=null;
                //3.写入文件image/jpeg
                if(httpUrl.contains("ImageViewServlet")){               // response.setContentType("image/jpeg");
                    response.setCharacterEncoding("UTF-8");                String agent = request.getHeader("User-Agent");
                    downloadfilename=LocalDateTime.now().toLocalDate()+"";
                    response.setHeader("Content-Disposition", "attachment; filename=\"" + downloadfilename+".png" + "\"");
                }else{
                    response.setCharacterEncoding("UTF-8");
                    String agent = request.getHeader("User-Agent");
                    boolean isMSIE = (agent != null && agent.indexOf("MSIE") != -1);
                     downloadfilename=httpUrl.substring(httpUrl.indexOf("downloadcenter")+16,httpUrl.length());
                    System.out.println(">>>>downloadfilename>>>>>"+downloadfilename);
                    if (isMSIE) {
                        downloadfilename = java.net.URLEncoder.encode(downloadfilename, "UTF8");
                    } else {
                        downloadfilename = new String(downloadfilename.getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1);
                    }
                    response.setHeader("Content-Disposition", "attachment; filename=\"" + downloadfilename + "\"");
                }
                System.out.println("下载"+httpUrl+"文件"+downloadfilename);
               // response.setContentType("multipart/form-data");
                out = response.getOutputStream();            //读取文件流
                int len = 0;            byte[] buffer = new byte[1024 * 10];
                while ((len = inStream.read(buffer)) != -1){
                    out.write(buffer,0,len);
                }
                out.flush();
                inStream.close();
               // return true;
            } catch (FileNotFoundException e) {            e.printStackTrace();
               // return false;
            } catch (IOException e) {            e.printStackTrace();
               // return false;
            }    }
    
        public static void main(String[] args) {
           // System.out.println(httpDownload("ftp://ygdy8:ygdy8@yg05.dydytt.net:1001/%E9%98%B3%E5%85%89%E7%94%B5%E5%BD%B1www.ygdy8.com.%E5%85%AB%E4%BD%B0.HD.1080p.%E5%9B%BD%E8%AF%AD%E4%B8%AD%E8%8B%B1%E5%8F%8C%E5%AD%97.mp4", "D:\\22.mp4"));
    
           // System.out.println(httpDownload("http://tms.hisense.com/ImageViewServlet?id=1373358", "D:\\1.jpg"));
    String str="http://minio-hisense-pangea-2-prd.prdapp.hisense.com/downloadcenter/%E8%AE%A4%E8%B4%AD%E5%8F%82%E4%B8%8E%E7%BB%93%E6%9E%9C%2820210202-093030%29.xlsx";        //System.out.println(httpDownload(str, "D:\\1.xls"));
    
        }}