示例代码：

try {

URL url = new URL("http://www.example.com/data.txt"); 
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream())); 

String inputLine; 

while ((inputLine = in.readLine()) != null) { 
    System.out.println(inputLine); 
}

in.close(); 

} catch (IOException e) {

 e.printStackTrace();   // print the error message to console   }