畢業後的第一份工作，

到手的第一個任務是 從ftp伺服器端下載檔案，並直接呼叫系統預設程式開啟

直接貼上Controller程式碼

<span style="white-space:pre">	</span>@RequestMapping("/downloadZj")
	@ResponseBody
	public Map<String,String> downloadZj(long sn, short xh) throws SocketException,
			IOException {
		Map<String,String> result = new HashMap<String,String>();
		Map<String, Object> map = zjzsService.getPath(sn, xh);
		if(map==null||map.size()==0){
			result.put("success", "false");
			result.put("msg", "該證據不存在");
			return result;
		}
		String serverName = (String) map.get("SERVERNAME");
		int port = Integer.parseInt(map.get("PORT").toString());
		String userName = (String) map.get("USERNAME");
		String pwd = (String) map.get("PWD");
		String serverFile = (String) map.get("FUXDPATH") + "/"
				+ map.get("ZIXDPATH") + "/" + map.get("WJMC");
		FTPClient ftp = new FTPClient();
		ftp.connect(serverName, port);
		// 也可以採用預設埠直接連線FTP伺服器
		// ftp.connect(serverName);
		int reply = ftp.getReplyCode();
		if (FTPReply.isPositiveCompletion(reply)) {
			if (ftp.login(userName, pwd)) {
				zjzsService.recodelog("登入ftp伺服器");
			}
		}
		//下載檔案到本地
		File localFile = new File("E:\\" + (String) map.get("WJMC"));
		OutputStream out = new FileOutputStream(localFile);
		ftp.retrieveFile(serverFile, out);
		// 開啟本地檔案
		Desktop.getDesktop().open(localFile);
		result.put("success", "true");
		result.put("msg", "");
		out.close();
		ftp.logout();
		if (ftp.isConnected()) {
			ftp.disconnect();
		}
		return result;
	}