testclient.java

java课程的资料以及实验的代码

//客户端applet

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

class Dealer extends Object implements Serializable
{
	String dName;
	String dPwd;
}
public class TestClient extends JApplet implements ActionListener
{
	JPanel panelObject;
	JLabel labelTitle;

	JLabel labelUserName; 
	JLabel labelPassword;
	//JFrame f1;

	JTextField textUserName;  
	JPasswordField textPassword;
    JButton submit;

	GridBagLayout gbObject;
	GridBagConstraints gbc;

	public void init()
	{
		gbObject = new GridBagLayout();
		gbc = new GridBagConstraints();
		panelObject = (JPanel)getContentPane();
		panelObject.setLayout(gbObject);
            
		labelTitle=new JLabel("客户登录");
		labelUserName = new JLabel("用户名：");
		labelPassword = new JLabel("密  码：");

		textUserName = new JTextField(15);
		textPassword = new JPasswordField(10);
		submit=new JButton("提  交");		
		
		gbc.anchor = GridBagConstraints.NORTHWEST;
		gbc.gridx = 1;
		gbc.gridy = 2;
		gbObject.setConstraints(labelTitle,gbc);
		panelObject.add(labelTitle);

		gbc.anchor = GridBagConstraints.NORTHWEST;
		gbc.gridx = 1;
		gbc.gridy = 5;
		gbObject.setConstraints(labelUserName,gbc);
		panelObject.add(labelUserName);
	
		gbc.anchor = GridBagConstraints.NORTHWEST;
		gbc.gridx = 4;
		gbc.gridy = 5;
		gbObject.setConstraints(textUserName,gbc);
		panelObject.add(textUserName);

		gbc.anchor = GridBagConstraints.NORTHWEST;	
		gbc.gridx = 1;
		gbc.gridy = 8;
		gbObject.setConstraints(labelPassword,gbc);
		panelObject.add(labelPassword);

		gbc.anchor = GridBagConstraints.NORTHWEST;
		gbc.gridx = 4;
		gbc.gridy = 8;
		gbObject.setConstraints(textPassword,gbc);
		panelObject.add(textPassword);

		gbc.anchor = GridBagConstraints.NORTHWEST;
		gbc.gridx = 4;
		gbc.gridy = 17;
		gbObject.setConstraints(submit,gbc);
		panelObject.add(submit);
		submit.addActionListener(this);

	/*	f1=new JFrame("操作界面");
		JButton button1,button2,button3;
		button1=new JButton("Log a Problem");
		button2=new JButton("Tech Chat");
		button3=new JButton("Exit");
		f1.getContentPane().setLayout(new FlowLayout());
		f1.getContentPane().add(button1);
		f1.getContentPane().add(button2);
		f1.getContentPane().add(button3);*/

	}
	public void actionPerformed(ActionEvent ev)
	{
		Object obj=ev.getSource();
		if(obj==submit)
		{
			Dealer uobj=new Dealer();
			uobj.dName=textUserName.getText();
			uobj.dPwd=new String(textPassword.getPassword());
		
			try
			{
				Socket toServer;//客户端socket
				
				//指出服务器端的ip地址和程序端口
				toServer=new Socket("127.0.0.1",5000);
				
				//对象输出流，以客户端socket的输出流为参数
				ObjectOutputStream streamToServer=new ObjectOutputStream(toServer.getOutputStream());
				//向服务器端输出对象流
				streamToServer.writeObject((Dealer)uobj);

				BufferedReader bf=new BufferedReader(new InputStreamReader(toServer.getInputStream()));
				String loginId=bf.readLine();
				
				if(loginId.length()!=0)
			    {
					getAppletContext().showStatus("您的登录信息:"+loginId);
					
					//f1.setSize(300,300);
					//f1.setVisible(true);
					
					streamToServer.close();
					bf.close();
				}
			}
			catch(Exception e)
			{
				getAppletContext().showStatus("登录时出错");
			}
		}
	}
}