/*小凌 QQ:3312883*/
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
class Customer extends Object implements java.io.Serializable
{
String custName;
String custPassword;
}
public class CustomerApplet extends JApplet
{
//声明 面板 标签 按钮....
JPanel panelObject;
JLabel labelCustName;
JLabel labelCustPassword;
JTextField textCustName;
JPasswordField textCustPassword;
JButton buttonLogin;
GridBagLayout gl;
GridBagConstraints gbc;
public void init()//程序入口
{
//初始化 布局 变量
gl = new GridBagLayout();//初始化格子布局 gl
gbc = new GridBagConstraints();//初始化格子约束
panelObject = (JPanel)getContentPane();//设置主面板
panelObject.setLayout(gl);//在主面板里设置一个格子布局 gl
//初始化 控件
labelCustName = new JLabel("Customer Login Name");
labelCustPassword = new JLabel("Password");
textCustName = new JTextField(15);
textCustPassword = new JPasswordField(15);
buttonLogin=new JButton("Login");
//添加控件到面板上
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 5;
gl.setConstraints(labelCustName,gbc);
panelObject.add(labelCustName);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 4;
gbc.gridy = 5;
gl.setConstraints(textCustName,gbc);
panelObject.add(textCustName);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 9;
gl.setConstraints(labelCustPassword,gbc);
panelObject.add(labelCustPassword);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 4;
gbc.gridy = 9;
gl.setConstraints(textCustPassword,gbc);
panelObject.add(textCustPassword);
gbc.anchor=GridBagConstraints.NORTHWEST;
gbc.gridx=2;
gbc.gridy=13;
gl.setConstraints(buttonLogin,gbc);//格子布局gl设置约束 把buttonLogin加入约束
panelObject.add(buttonLogin);
LoginAction loginrequest=new LoginAction();//初始化一个登陆按钮监听类 为loginrequest
buttonLogin.addActionListener(loginrequest);//给登陆按钮(buttonLogin)加上"登陆按钮监听类" 让他有事件功能
}
class LoginAction implements ActionListener//登陆按钮监听类
{
public void actionPerformed(ActionEvent evt)//当发生事件从这里开始
{
Object obj=evt.getSource();//取出事件内容
if(obj==buttonLogin)//判断事件内容
{
Customer data=new Customer();//初始化一个Customer类
data.custName = textCustName.getText();//取JTextField的内容也就是用户名 赋值到data.custName上
data.custPassword =new String(textCustPassword.getPassword());//基本同上 这次是取的密码 赋值到data.custPassword
try//捕获异常
{
Socket toServer;//声明一个套接字用来连接服务器
toServer = new Socket("127.0.0.1",1001);//初始化toServer 开始连接服务器
ObjectOutputStream streamToServer=new ObjectOutputStream (toServer.getOutputStream());//初始化一个输出流用来取服务器的IP 然后把 IP放入一个 才初始化的输出流streamToServer 这个输出流用来 向服务器发送数据
streamToServer.writeObject((Customer)data);//发送数据到服务器(SP "(Customer)data"这也是个数据转换 到data转换到Customer类型)
//下面这段就是监听了
BufferedReader fromServer=new BufferedReader(new InputStreamReader(toServer.getInputStream()));//这句看着这么长其实很简单 就是把服务器返回的数据 放到fromServer里
String status=fromServer.readLine();//然后读出fromServer里的数据 到一个字符类型status
getAppletContext().showStatus(status);//在把status显示到 Applet里
streamToServer.close();//关闭输出流
fromServer.close();//关闭BufferedReader //正常情况下 程序到这里就终止了
}
catch(InvalidClassException e)
{
showStatus("The Customer class is invalid" + e);
}
catch(NotSerializableException e)
{
showStatus("The object is not serializable" + e);
}
catch(IOException e)
{
//showStatus("Cannot write to the server" + e);
showStatus("连接服务器失败！");
}
}
}
}
}
