检索添加了用户输入的网站

Question

我读到要在java中检索网页，使用起来很快：

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

但是如何将用户给定的变量添加到url中？例如：

用户输入 x 加载页面 http://example.com/x.php

我是 java 新手，所以有任何帮助将不胜感激。

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();