java 访问google(不FQ)

package csvtojson.host;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

/**
 * Created by Administrator on 2016/11/23.
 */
public class ModifyHosts {
    public static String readInputStream(InputStream inputStream)
            throws IOException {
        byte[] buffer = new byte[1024];
        int len = 0;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        while ((len = inputStream.read(buffer)) != -1) {
            bos.write(buffer, 0, len);
        }
        bos.close();
        String data = new String(bos.toByteArray(),"UTF-8");
        return data;
    }

    public static String file_put_contents(String filename, String content) throws IOException{
        File files = new File(filename);
        FileOutputStream out = new FileOutputStream(files);
        byte by[] = content.getBytes();
        out.write(by);
        out.close();
        return file_get_contents(filename);
    }

    public static String file_get_contents(String filename) throws IOException{
        File files = new File(filename);
        FileInputStream in = new FileInputStream(files);
        byte byt[] = new byte[32768];
        int length = in.read(byt);
        in.close();
        return new String(byt, 0, length);
    }

    public static String modifyHost() throws IOException {
        URL url = new URL("http://www.360kb.com/kb/2_122.html");
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        InputStream inputStream = conn.getInputStream(); // 通过输入流获得网站数据
        String htmlString = readInputStream(inputStream);
//System.out.println(htmlString);
        htmlString = htmlString.replaceAll(" ","");
        htmlString = htmlString.replaceAll("<span>","");
        htmlString = htmlString.replaceAll("</span>","");
        htmlString = htmlString.replaceAll("<br />","");

//System.err.println(htmlString);
//根据360kb网站最新数据修改了源码此处
        htmlString = htmlString.substring(htmlString.indexOf("#google hosts"),
                htmlString.indexOf("#google hosts 2016 end"));

        System.err.println(htmlString.indexOf("#google hosts 2016 end"));
//System.out.println(htmlString);

        String filename ="C:/Windows/System32/drivers/etc/HOSTS";
        return file_put_contents(filename, htmlString);
    }

    public static void main(String[] args) {
        myJFrame frame1 = new myJFrame();
        frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 一定要设置关闭
        frame1.setVisible(true);
    }

}

class myJFrame extends JFrame {
    private static final long serialVersionUID = -6921659932048296022L;

    public myJFrame() {
        super();
//init myframe
        this.setSize(600, 600);
        this.setLocation(100, 100);
        this.setTitle("Get Google New IP");
//add button and scrollPanel to panel
        panel.add(button);
        panel.add(scrollPanel);
        add(panel);
//add button event listener
        button.addActionListener(new ButtonListen(ipJTextArea));
        button.setLocation(290, 20);
//set TextColor Red when selected
        ipJTextArea.setSelectedTextColor(Color.RED);
//Auto appear
        scrollPanel.setHorizontalScrollBarPolicy(
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        scrollPanel.setVerticalScrollBarPolicy(
                JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
    }

    JButton button = new JButton("Modify Host!");
    JPanel panel = new JPanel();
    JTextArea ipJTextArea = new JTextArea("这里显示的是Hosts文件的内容", 30, 50);
    JScrollPane scrollPanel = new JScrollPane(ipJTextArea);
}

class ButtonListen implements ActionListener {
    JTextArea ipJTextArea;
    public ButtonListen(JTextArea ipJTextArea){
        this.ipJTextArea = ipJTextArea;
    }

    public void actionPerformed(ActionEvent e) {
        ipJTextArea.setText("");
        try {
            String hostFileContent = ModifyHosts.modifyHost();
            ipJTextArea.append(hostFileContent);
        } catch (Exception e1) {
            System.out.println(e1.toString());
            ipJTextArea.append("Modify Failure!");
        }
    }
}

　　参考来源:https://code.csdn.net/snippets/1620334