JAVA 通過URL 獲取頁面內容

package com.example;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
/**
 * 通過URL讀取頁面內容
 * */

public class MyClass {

    public static void main(String[] args){

        System.out.println("hello world !!!");

        try {
            //創建一個URL實例
            URL url = new URL("http://www.baidu.com");

            try {
                //通過URL的openStrean方法獲取URL對象所表示的自願字節輸入流
                InputStream is = url.openStream();
                InputStreamReader isr = new InputStreamReader(is,"utf-8");

                //爲字符輸入流添加緩衝
                BufferedReader br = new BufferedReader(isr);
                String data = br.readLine();//讀取數據

                while (data!=null){//循環讀取數據
                    System.out.println(data);//輸出數據
                    data = br.readLine();
                }
                br.close();
                isr.close();
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
    }
}//這樣就能獲取百度頁面的html代碼了