一个jframe版的java抓包工具

一个最原始的java抓取网页信息的工具：

public class HttpSniffer extends JFrame {
	JTextArea response = new JTextArea();
	JTextField address = new JTextField();
	JLabel jLabel1 = new JLabel();
	JLabel jLabel2 = new JLabel();
	JTextField port = new JTextField();
	JButton send = new JButton();
	JLabel jLabel3 = new JLabel();
	JTextField command = new JTextField();
	JScrollPane jScrollPane1 = new JScrollPane();

	public HttpSniffer() {
		try {
			jbInit();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {
		HttpSniffer frame = new HttpSniffer();
		frame.setBounds(0, 0, 600, 400);
		frame.setVisible(true);

	}

	private void jbInit() throws Exception {
		this.getContentPane().setLayout(null);
		address.setText("127.0.0.1");
		address.setBounds(new Rectangle(77, 7, 143, 19));
		jLabel1.setText("Address");
		jLabel1.setBounds(new Rectangle(6, 5, 69, 18));
		jLabel2.setText("Port");
		jLabel2.setBounds(new Rectangle(230, 7, 30, 20));
		port.setText("8080");
		port.setBounds(new Rectangle(265, 7, 72, 18));
		send.setText("Send Request");
		send.setBounds(new Rectangle(347, 6, 117, 58));
		send.addActionListener(new java.awt.event.ActionListener() {
			public void actionPerformed(ActionEvent e) {
				send_actionPerformed(e);
			}
		});
		jLabel3.setText("Command");
		jLabel3.setBounds(new Rectangle(2, 39, 74, 24));
		command.setText("GET /index.jsp HTTP/1.1");
		command.setBounds(new Rectangle(74, 42, 265, 24));
		jScrollPane1.setBounds(new Rectangle(8, 76, 560, 270));
		this.getContentPane().add(address, null);
		this.getContentPane().add(address, null);
		this.getContentPane().add(jLabel1, null);
		this.getContentPane().add(jLabel2, null);
		this.getContentPane().add(port, null);
		this.getContentPane().add(send, null);
		this.getContentPane().add(jLabel3, null);
		this.getContentPane().add(command, null);
		this.getContentPane().add(jScrollPane1, null);
		jScrollPane1.getViewport().add(response, null);
	}

	void send_actionPerformed(ActionEvent e) {
		response.setText("");
		String host = "";
		int portNumber = 0;
		boolean ok = true;
		try {
			host = address.getText();
			portNumber = Integer.parseInt(port.getText());
		} catch (Exception ex) {
			ok = false;
		}
		if (ok) {
			try {
				Socket socket = new Socket(host, portNumber);
				OutputStream os = socket.getOutputStream();
				boolean autoflush = true;
				PrintWriter out = new PrintWriter(socket.getOutputStream(), autoflush);
				String message = command.getText();
				out.println(message);
				out.println("Host: localhost:8080");
				out.println("Connection: Close");
				out.println();
				BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
				boolean loop = true;
				StringBuffer sb = new StringBuffer(8096);
				while (loop) {
					if (in.ready()) {
						int i = 0;
						while (i != -1) {
							i = in.read();
							sb.append((char) i);
						}
						loop = false;
					}
					Thread.currentThread().sleep(50);
				}
				response.setText(sb.toString());
				socket.close();
			} catch (Exception ex) {
				ex.printStackTrace();
			}
		}
	}
}