Java依据一个网址链接获取源代码

package test;import java.io.BufferedReader;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;public class HttpTest {    private String u;    private String encoding;    public static void main(String[] args) throws Exception {        HttpTest client = new HttpTest("http://www.baidu.com/", "UTF-8");        client.run();    }    public HttpTest(String u, String encoding) {        this.u = u;        this.encoding = encoding;    }    public void run() throws Exception {        URL url = new URL(u);// 根据链接（字符串格式），生成一个URL对象        HttpURLConnection urlConnection = (HttpURLConnection) url                .openConnection();// 打开URL        BufferedReader reader = new BufferedReader(new InputStreamReader(                urlConnection.getInputStream(), encoding));// 得到输入流，即获得了网页的内容        String line; // 读取输入流的数据，并显示        while ((line = reader.readLine()) != null) {            System.out.println(line);        }    }}