一、登陆界面的实现

登陆界面主要使用了JFrame，以及相关的一些组件，并且在界面中加上监听
登陆界面效果图
在这里插入图片描述
登陆界面代码Login类

package com.lding.login;import com.lding.ui.MsgUI;import javax.swing.*;
import java.awt.*;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.DelayQueue;/*** @program: Net* @description: 登陆类* @author: 王丁* @date: 2021-09-25 14:47**/
public class Login {private OutputStream outputStream;private String port;private InputStream inputStream;private boolean flag=false;private JTextField jTextField;private JPasswordField jPasswordField;public JTextField getjTextField() {return jTextField;}public void setjTextField(JTextField jTextField) {this.jTextField = jTextField;}public JPasswordField getjPasswordField() {return jPasswordField;}public void setjPasswordField(JPasswordField jPasswordField) {this.jPasswordField = jPasswordField;}public boolean isFlag() {return flag;}public void setFlag(boolean flag) {this.flag = flag;}public Login(String port){this.port=port;}public Login(InputStream inputStream,OutputStream outputStream, String port) {this.outputStream = outputStream;this.port = port;this.inputStream=inputStream;}public OutputStream getOutputStream() {return outputStream;}public void setOutputStream(OutputStream outputStream) {this.outputStream = outputStream;}public String getPort() {return port;}public void setPort(String port) {this.port = port;}public InputStream getInputStream() {return inputStream;}public void setInputStream(InputStream inputStream) {this.inputStream = inputStream;}public void showUI(Login login)  {JFrame jf=new JFrame();jf.setTitle("❤️DDqq登陆界面❤️");jf.setSize(500,400);//只对顶级容器有效jf.setDefaultCloseOperation(3);//窗体关闭时结束程序jf.setLocationRelativeTo(null);//居中jf.setResizable(false);//选择布局类型，定义流式布局对对象，并且设置每个组件之间相隔5FlowLayout fl=new FlowLayout(FlowLayout.CENTER,5,5);jf.setLayout(fl);//设置顶级容器的布局为流式布局//设置不同组件的格式大小Dimension dim1=new Dimension(500,200);//图片大小Dimension dim2=new Dimension(100,50);//标签大小Dimension dim3=new Dimension(300,30);//输入框大小Dimension dim4=new Dimension(100,40);//按钮大小//添加组件//添加图片，先把图片加载到内存中，利用ImageIcon类把图片加载到内存ImageIcon icon=new ImageIcon("source/Login1.jpg");JLabel labimg=new JLabel(icon);//不可以直接把图片加到顶级容器中，需要先将其设置为表桥labimg.setPreferredSize(dim1);jf.add(labimg);//再将标签加到顶级容器中//添加账号标签JLabel labuser=new JLabel();labuser.setText("user：");labuser.setPreferredSize(dim2);jf.add(labuser);//添加账号输入框JTextField textuser=new JTextField();textuser.setPreferredSize(dim3);jf.add(textuser);//添加密码标签JLabel labpassword=new JLabel();labpassword.setText("password：");labpassword.setPreferredSize(dim2);jf.add(labpassword);//添加密码输入框JPasswordField textPassword=new JPasswordField();textPassword.setPreferredSize(dim3);jf.add(textPassword);//添加一个button按钮JButton button=new JButton();button.setBorder(BorderFactory.createRaisedBevelBorder());button.setText("login");button.setPreferredSize(dim4);jf.add(button);jf.setVisible(true);//首先实例化登陆按钮监听类的对象，并把登陆界面中的账号和密码输入框的对象传给它LoginListener ll=new LoginListener(jf,textuser,textPassword,login);//对当前窗体添加监听方法button.addActionListener(ll);//监控按钮while (true){
//            for(int i=0;i<10000000;i++){
//                for(int j=0;j<1000000;j++){
//
//                }
//            }//起到延时的作用，System.out.println(1);//如果登陆完毕咋可以跳出这个循环this.flag=ll.isFlag();if(this.flag)break;}this.jTextField=ll.getjTextField();this.jPasswordField=ll.getjPasswordField();System.out.println("ok");}
}

login的监听类 LoginListener

package com.lding.login;import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;/*** @program: Net* @description:* @author: 王丁* @date: 2021-09-25 16:17**/
public class LoginListener implements ActionListener {private JTextField jTextField;private JPasswordField jPasswordField;private JFrame login;private Login loginnew;private boolean flag=false;public JTextField getjTextField() {return jTextField;}public void setjTextField(JTextField jTextField) {this.jTextField = jTextField;}public JPasswordField getjPasswordField() {return jPasswordField;}public void setjPasswordField(JPasswordField jPasswordField) {this.jPasswordField = jPasswordField;}public boolean isFlag() {return flag;}public void setFlag(boolean flag) {this.flag = flag;}public LoginListener(JFrame login, JTextField jTextField, JPasswordField jPasswordField, Login loginnew) {this.jTextField = jTextField;this.jPasswordField = jPasswordField;this.login = login;this.loginnew=loginnew;}@Overridepublic void actionPerformed(ActionEvent e) {//输入框需要getText（）才能得到字符串if(jTextField.getText().equals("lding")&&String.valueOf(jPasswordField.getPassword()).equals("123456")){this.flag=true;//关闭这个登陆页面，登陆完毕login.dispose();}else if(jTextField.getText().equals("Alice")&&String.valueOf(jPasswordField.getPassword()).equals("123456")){System.out.println(2);this.flag=true;login.dispose();}}
}

在登陆完毕后，需要跳转到聊天界面，这里采用的方法是通过一个flag标志来判断是否登陆完毕，当登陆完毕后，会创建新的聊天界面，并且登陆页面会被关闭
依然是双端通信，假定一端为客户端，一端为服务端，其实两端都可为用户。

聊天界面运行图
先登陆Alice的账号密码为123456
在这里插入图片描述
登陆成功后显示ok，并等待连接

再登陆冷丁的账号，密码为123456

当lding账号登陆成功后完成连接，这时候会弹出两个新的JFram窗口，为聊天见面

随后可以发送消息，消息可以实时显示时间，并显示用户名
一方发送的消息会在另一方的窗口上实时显示出来
在这里插入图片描述
MsgClient类代码

package com.lding.net;import com.lding.login.Login;
import com.lding.ui.MsgUI;import javax.swing.*;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.Date;/*** @program: Net* @description: 聊天室客户端* @author: 王丁* @date: 2021-09-25 10:42**/
public class MsgClient {static public JTextField jTextField;static  private JPasswordField jPasswordField;public JTextField getjTextField() {return jTextField;}public void setjTextField(JTextField jTextField) {this.jTextField = jTextField;}public JPasswordField getjPasswordField() {return jPasswordField;}public void setjPasswordField(JPasswordField jPasswordField) {this.jPasswordField = jPasswordField;}public static  void main(String[] args) throws IOException {//调用登陆界面String port="客户端";Login login=new Login(port);login.showUI(login);//为了防止客户端还没登陆就弹出聊天界面//通过判断flag，当客户端完成登陆后//在login的监听器中将其flag变为true，从而一层层的把客户端中的flag变为trueif(login.isFlag()){//客户端读取登陆用户的名字，也是通过一层层读取jTextField=login.getjTextField();String name=jTextField.getText();System.out.println(login.isFlag());//创建一个Socket连接Socket socket=new Socket("127.0.0.1",8888);//输入 输出流对象InputStream inputStream=socket.getInputStream();OutputStream outputStream=socket.getOutputStream();//创建聊天页面MsgUI msgUI=new MsgUI(outputStream,name);JTextPane showmsgpane=msgUI.initUI(name);//这里用count来判断是用户名输入还是内容输入//由于消息是两部分拼接的，在消息监听器中先后发送了两部分消息//第一部分是发送者的名字，第二部分是消息内容//在输出两种消息的时候采用两种不同的格式，所以对count进行判断int count=1;while(true){int msglenth=inputStream.read();System.out.println("消息长度："+msglenth);byte[] msgbytes=new byte[msglenth];//将接下来的数据读入字节数组中inputStream.read(msgbytes);count++;if(count%2==0){SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式String date = df.format(new Date());// new Date()为获取当前系统时间，也可使用当前时间戳String getmsg=new String(msgbytes);String msg=showmsgpane.getText();showmsgpane.setText(msg+date+"  ["+getmsg+"]"+"说:"+"\n");}else{String getmsg=new String(msgbytes);String msg=showmsgpane.getText();showmsgpane.setText(msg+getmsg+"\n");}}}}
}

MsgServer代码

package com.lding.net;import com.lding.login.Login;
import com.lding.ui.MsgUI;import javax.swing.*;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.Date;/*** @program: Net* @description: 聊天室服务端* @author: 王丁* @date: 2021-09-25 10:42**/
public class MsgServer {static  public JTextField jTextField;static  private JPasswordField jPasswordField;public JTextField getjTextField() {return jTextField;}public void setjTextField(JTextField jTextField) {this.jTextField = jTextField;}public JPasswordField getjPasswordField() {return jPasswordField;}public void setjPasswordField(JPasswordField jPasswordField) {this.jPasswordField = jPasswordField;}public void MsgServerInit(){}public  static void main(String[] args) throws IOException {//调用登陆页面String port="服务端";Login login=new Login(port);login.showUI(login);/*********************************************/ServerSocket serverSocket=new ServerSocket(8888);System.out.println("等待连接！！");Socket clientsocket=serverSocket.accept();//监听连接System.out.println("连接成功！！");jTextField=login.getjTextField();String name=jTextField.getText();InputStream inputStream=clientsocket.getInputStream();OutputStream outputStream=clientsocket.getOutputStream();MsgUI msgUI=new MsgUI(outputStream,name);JTextPane showmsgpane=msgUI.initUI(name);//这里用num来判断是用户名输入还是内容输入//由于消息是两部分拼接的，在消息监听器中先后发送了两部分消息//第一部分是发送者的名字，第二部分是消息内容//在输出两种消息的时候采用两种不同的格式，所以对count进行判断int num=1;while(true){//根据传入的字符数构造字节数组对象int msglenth=inputStream.read();System.out.println("消息长度是："+msglenth);byte[] msgbytes=new byte[msglenth];//将接下来的数据读入字节数组中inputStream.read(msgbytes);num++;if(num%2==0){SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式String date = df.format(new Date());// new Date()为获取当前系统时间，也可使用当前时间戳String getmsg=new String(msgbytes);String msg=showmsgpane.getText();showmsgpane.setText(msg+date+"  ["+getmsg+"]"+"说:"+"\n");}else{String getmsg=new String(msgbytes);String msg=showmsgpane.getText();showmsgpane.setText(msg+getmsg+"\n");}}}
}