Question

java ftp连接一次下载多个文件

Answer 1

/**
     * 参考例子如下：
     * @param namelist 下载的文件列表
     * @param path 下载路径
     * @param zipname 压缩文件名称
     */
    public void zipDownloadFile(HttpServletResponse response,List<string> namelist,String path,String zipname){
        byte[] buf = new byte[1024];
     
        try {
             
            // 本地保存设置
            response.addHeader("Content-Disposition", "attachment; filename="
                    + URLEncoder.encode(zipname, sysEncoding)+".zip");
             
            response.setContentType("application/x-zip-compressed");
             
            // 向本地写文件
            ServletOutputStream sos=response.getOutputStream();
   
             
           ZipOutputStream zipOut  = new ZipOutputStream(new BufferedOutputStream(sos)); 
 
            
            for (String name : namelist) {
                 
                    ZipEntry entry = new ZipEntry(name); 
                    zipOut.putNextEntry(entry);   
                     
                    InputStream bis = this.getStream(path, name);
                    if(bis!=null){
                    int readLen = -1;
 
                    while ((readLen = bis.read(buf, 0, 1024)) != -1) {
                        zipOut.write(buf, 0, readLen);
                   }
       
                    bis.close();   
                    }
            }
             
            zipOut.close();
         
             
        } catch (Exception e) {
         
            e.printStackTrace();
        }
         
    }</string>

Answer 2

之前做的ftp连接下载的例子，你试试！

for (int i = 0; i < fileStr.length; i++) {
    String nowMonth = yesDay.substring(0, 6);
    System.out.println("nowMonth=" + nowMonth);
    String DloadPath = path + fileStr[i] + "/BILL/" + nowMonth + "/";

				System.out.println(DloadPath);
				FtpUtil f = new FtpUtil();
				f.connectServer(server, port, user, password, DloadPath);
				f.setFileType(FtpUtil.ASCII_FILE_TYPE);

				// 获取服务器文件列表
				List<String> serverList = f.getFileList(DloadPath);
				for (int x = 0; x < serverList.size(); x++) {
					String filename = serverList.get(x);
					int y = Tools.getStringArrayIndex(localArr, filename);
					if (y == -1) {
						if (filename.startsWith(fileStr[i] + "_" + yesDay)) {
							f.download(filename, Tools.localPath + filename);
						}
					}
				}
				System.out.println("下载文件成功！");
				localArr = Tools.getLocalFileNameArray(Tools.localPath);
				for (int z = 0; z < localArr.length; z++) {
					File ff = new File(Tools.localPath + localArr[z]);
					long l = Tools.getFileSizes(ff);
					if (l == 0) {
						System.out.println(Tools.localPath + localArr[z] + "need download");
						Tools.InTxt("E:/time.txt", Tools.localPath + localArr[z] + "  need download");
						f.download(localArr[z], Tools.localPath + localArr[z]);
					}
				}
				f.closeServer();
}

Answer 3

开多线程 。。。。。。。。。。。。。。。。。