检索添加了用户输入的网站

Question

我读到要在java中检索网页，可以快速使用：

URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("GET");
connection.connect();

InputStream stream = connection.getInputStream();
// read the contents using an InputStreamReader

但是我如何将用户提供的变量添加到url中？例如：

用户输入x 加载页面http://example.com/x.php

我是java的新手，所以任何帮助都会受到赞赏。

Answer 1

您可以像这样使用字符串连接：

final String url = "http://example.com" + "/" + userInput

然后，您可以使用该字符串实例化URL。

Answer 2

URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
URL urlWithInput = new URL("http://example.com" + input);
connection.setRequestMethod("GET");   
connection.connect();       
InputStream stream = connection.getInputStream();      

或者

String url = "http://example.com" + "/" + input
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
URL urlWithInput = new URL(url);
connection.setRequestMethod("GET");   
connection.connect();       
InputStream stream = connection.getInputStream();