Java - 将文本写入远程文件

Question

我尝试从服务器获取txt文件并向其写入一些文本。但似乎我使用的方法并不起作用。

<intercept-url pattern="/savePhoto**" access="hasRole('VIEW')" method="POST"/>

我这样运行：

 public static void writeFile(String urls, String text) throws Exception {

    String string = URLEncoder.encode(text, "UTF-8");

    URL url = new URL(urls);
    URLConnection connection = url.openConnection();
    connection.setDoInput(true);
    connection.setDoOutput(true);
    OutputStreamWriter out = new OutputStreamWriter(
                                     connection.getOutputStream());
    out.write(string);
    out.append("a");
    out.close();

    BufferedReader in = new BufferedReader(
                                new InputStreamReader(
                                connection.getInputStream()));
    String decodedString;
    while ((decodedString = in.readLine()) != null) {
        System.out.println(decodedString);
    }
    in.close();     
}

请告诉我我做错了什么。请帮我。先感谢您！ ：）