【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

文章目录


前言

本篇文章适合刚刚学完JavaSE、GUI、多线程、网络变成的JAVA新手,出自于java课程的课程设计。本课设全方位的涉及到了以上的知识点,对于大二刚刚接触JAVA的同学而言,是一个非常好的练手项目。


一、核心知识

本篇的核心知识有GUI、网络编程(包括UDP、TCP网络编程),Maven的使用,Java连接数据库、Java的基础知识、MySQL的使用等等。
本篇课设模仿了一个网络通讯工具,实现了登录、注册、修改密码、注销、两人聊天,群聊、添加好友等功能。
其中最核心的在于利用线程池的方式来管理服务器的连接,举个例子:群聊是如何实现的?即用户A向服务端发送消息,服务端接收到消息后,会将该消息转发给连接服务端的所有用户端,从而达到了群聊的效果。
本篇课设中通过多线程的方法,可以登录多个账号,其中私聊使用了TCP的方式、群聊使用了UDP的方式,而且本篇课设还涉及到了GUI的大量使用。

二、效果

1.注册

分别用到了select、insert语句,先在数据库中查询用户名是否存在,若存在则弹出用户名已存在,若不存在则执行insert语句,插入到数据库中。

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

2、登录

用select语句联表查询用户名和密码,如果有用户说明密码正确,如果返回值为空,说明密码或者用户名错误。

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

3、修改密码

使用select语句先检查用户名和原密码是否存在,如果正确,则使用update语句更新密码

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

4、注销

使用delete语句,将该用户列删除,并退出主界面,以实现注销的效果。

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

5、主界面

主界面初始化主界面有管理员,以及群聊的按钮。主要功能有聊天,添加好友,添加信息的查看,注销的功能

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

6、添加好友

insert语句的使用,但是插入之前需要判断一下,对方是否同意,如果对方同意在相互的表里插入相互的信息,如果不同意,则不插入。符合数据的一致性

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

7、私聊

运用了TCP网络编程固定知识。超过一定的时间段,会显示发送的时间

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

8、群聊

使用群聊之前需要手动打开ServerChat2,使用了UDP网络编程的知识。

【Java】涉及到GUI、JAVASE、网络编程、多线程、数据库的聊天系统,非常适合大学Java课程的练手

源代码

1、实体类

Examine.java

package pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;


public class Examine {
int id;
String friendName;
int friendPort;
String user;
char status;

public Examine() {
}

public Examine(int id, String friendName, int friendPort, String user, char status) {
this.id = id;
this.friendName = friendName;
this.friendPort = friendPort;
this.user = user;
this.status = status;
}

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getFriendName() {
return friendName;
}

public void setFriendName(String friendName) {
this.friendName = friendName;
}

public int getFriendPort() {
return friendPort;
}

public void setFriendPort(int friendPort) {
this.friendPort = friendPort;
}

public String getUser() {
return user;
}

public void setUser(String user) {
this.user = user;
}

public char getStatus() {
return status;
}

public void setStatus(char status) {
this.status = status;
}

@Override
public String toString() {
return "Examine{" +
"id=" + id +
", friendName='" + friendName + ''' +
", friendPort=" + friendPort +
", user='" + user + ''' +
", status=" + status +
'}';
}
}

People.java

package pojo;

public class People {
// int id;
String user;
String pwd;
int port;

public People() {
}

public People(int id, String user, String pwd,int port) {
// this.id = id;
this.user = user;
this.pwd = pwd;
this.port = port;
}

// public int getId() {
// return id;
// }

// public void setId(int id) {
// this.id = id;
// }

public String getUser() {
return user;
}

public void setUser(String user) {
this.user = user;
}

public String getPwd() {
return pwd;
}

public void setPwd(String pwd) {
this.pwd = pwd;
}

public int getPort() {
return port;
}

public void setPort(int port) {
this.port = port;
}

@Override
public String toString() {
return "People{" +
// "id=" + id +
", user='" + user + ''' +
", + pwd + ''' +
", port=" + port +
'}';
}
}

2、功能类

AddUser.java

package QQChat;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class AddUser implements Runnable{
String userName;
int port;

public AddUser(String userName, int port) {
this.userName = userName;
this.port = port;
}


public void init() {
final JFrame jFrame = new JFrame("添加朋友");
jFrame.setSize(430, 116);
jFrame.setLocation(700, 200);
/*2、来个面板*/
JPanel jPanel = new JPanel();
jPanel.setSize(jFrame.getWidth(), jFrame.getHeight());
/*3、添加文本框,密码框*/
final JTextField jTextField = new JTextField(15);

/*4、来个标签,三个一个背景,一个用户名,一个密码*/
JLabel label1 = new JLabel("用户名:");

label1.setForeground(new Color(0xD2C11B));
ImageIcon icon = new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\ComeToChat\src\main\img\bj3.png");
JLabel imgLabel = new JLabel(icon);
imgLabel.setSize(430, 116);
label1.setBounds(20, 23, 45, 32);

/*6、加一个注册按钮*/
JButton registerButton = new JButton("添加");
/*7、加一个修改密码的按钮*/
jTextField.setBounds(85, 25, 120, 24);
registerButton.setBounds(280, 25, 80, 24);

// jFrame.setUndecorated(true);//删除标题栏
jFrame.add(registerButton);
jFrame.add(label1);
jFrame.add(imgLabel);
jFrame.add(jTextField);

jFrame.add(jPanel);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);//关闭
jFrame.setResizable(false);
jFrame.setVisible(true);
registerButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
String user = jTextField.getText();
/*1、需要查询用户名是否重复*/
/*2、插入*/
String driver = "com.mysql.cj.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/smm?useSSL=true&useUnicode=true&characterEncoding=utf8";
String username = "root";
String pass = "202";
Connection connection = null;
Statement statement = null;
ResultSet resultSet = null;
String userSql = "select * from smm.people where people.user='" + user +"';";//查看user是否重复了
String user2Sql = "select * from user_view where user='" + user +"' and friend ='"+userName+"';";//查看user是否重复了
System.out.println(user2Sql);
String intoSql = "insert into smm.examine(friendName,friendPort,user) values('"+userName+"','"+port+"','"+user+"')";
System.out.println(intoSql);
System.out.println(userSql);
try {
Class.forName(driver);
connection = DriverManager.getConnection(url, username, password);
statement = connection.createStatement();
if ( jTextField.getText().isEmpty()) {
JOptionPane.showMessageDialog(null, "输入不可为空");

} else {
resultSet = statement.executeQuery(userSql);
if (resultSet.next()) {
ResultSet resultSet1 = null;
resultSet1 = statement.executeQuery(user2Sql);
if(resultSet1.next()||user.equals(userName))
{
JOptionPane.showMessageDialog(null, "您和他已经是朋友啦");
}else{
JOptionPane.showMessageDialog(null, "已发送验证信息");
statement.execute(intoSql);

}

// jFrame.setVisible(false);
// new Login().init();

} else {
JOptionPane.showMessageDialog(null, "查无此人");
}
}

} catch (Exception exception) {
exception.printStackTrace();
}

}
});
}

@Override
public void run() {
init();
}
}

ChangePWd.java

package QQChat;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class ChangePwd {
public void init() {
final JFrame jFrame = new JFrame("修改密码");
jFrame.setSize(442, 589);
jFrame.setLocation(700, 200);
/*2、来个面板*/
JPanel jPanel = new JPanel();
jPanel.setSize(jFrame.getWidth(), jFrame.getHeight());
/*3、添加文本框,密码框*/
final JTextField jTextField = new JTextField(15);
final JPasswordField jPasswordField = new JPasswordField(15);
final JPasswordField reJPasswordField = new JPasswordField(15);
/*4、来个标签,三个一个背景,一个用户名,一个密码*/
JLabel label1 = new JLabel("用户名:");
label1.setForeground(new Color(0x0E8DCE));
JLabel label2 = new JLabel("密 码:");
label2.setForeground(new Color(0x060D11));
JLabel label3 = new JLabel("新密码:");
label3.setForeground(new Color(0x07EABD));
ImageIcon icon = new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\ComeToChat\src\main\img\bj3.png");
;
JLabel imgLabel = new JLabel(icon);
imgLabel.setSize(442, 589);
label1.setBounds(32, 122, 45, 32);
label2.setBounds(32, 156, 45, 32);
label3.setBounds(32, 190, 45, 32);

/*6、加一个注册按钮*/
JButton registerButton = new JButton("修改");
registerButton.setBounds(150, 280, 100, 32);
/*7、加一个修改密码的按钮*/
jTextField.setBounds(80, 128, 270, 24);
jPasswordField.setBounds(80, 162, 270, 24);
reJPasswordField.setBounds(80, 196, 270, 24);
jFrame.add(registerButton);
jFrame.add(label1);
jFrame.add(label2);
jFrame.add(label3);
jFrame.add(imgLabel);
jFrame.add(jTextField);
jFrame.add(jPasswordField);
jFrame.add(reJPasswordField);
jFrame.add(jPanel);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);//关闭
jFrame.setResizable(false);
jFrame.setVisible(true);
registerButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if ( jTextField.getText().isEmpty() || jPasswordField.getText().isEmpty() || reJPasswordField.getText().isEmpty()) {
JOptionPane.showMessageDialog(null, "输入不可为空");
} else {
String user = jTextField.getText();
String p1 = jPasswordField.getText();
String p2 = reJPasswordField.getText();

/*1、需要查询用户名是否重复*/
/*2、插入*/
String driver = "com.mysql.cj.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/smm?useSSL=true&useUnicode=true&characterEncoding=utf8";
String username = "root";
String pass = "20022";
Connection connection = null;
Statement statement = null;
ResultSet resultSet = null;
String userSql = "select * from smm.people where people.user='" + user + "' and people.pwd ="+"'"+p1+"';";
System.out.println(userSql);
try {
Class.forName(driver);
connection = DriverManager.getConnection(url, username, password);
statement = connection.createStatement();
if (jPasswordField.getText().isEmpty() || jTextField.getText().isEmpty()) {
JOptionPane.showMessageDialog(null, "输入不可为空");

} else {
resultSet = statement.executeQuery(userSql);
if (resultSet.next()) {
int id = resultSet.getInt("id");
String updateSql = "update smm.people set people.pwd = "+p2+" where id ="+id+"; ";
statement.execute(updateSql);
JOptionPane.showMessageDialog(null, "修改成功");
jFrame.setVisible(false);
new Login().init();

} else {
JOptionPane.showMessageDialog(null, "原密码错误");
}
}

} catch (Exception exception) {
exception.printStackTrace();
}

}
}
});
}
}

ClientChat.java

package QQChat;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.Date;

public class ClientChat implements Runnable {
private String Myname = null;
private JTextArea ta = new JTextArea(10, 20);
//聊天记录输入区
private JTextField tf = new JTextField(20);
private Boolean flag = false;

//端口
// 静态常量主机端口号
private static final String CONNSTR = "127.0.0.1";
// 静态常量服务器端口号
private static final int CONNPORT = 1111;
private Socket socket = null;
Date passDate = new Date();
JTextArea area = new JTextArea(100, 10);
//Client发送数据
private DataOutputStream dataOutputStream = null;

public ClientChat(String myname) {
Myname = myname;
}

public void init() {
try {
socket = new Socket(CONNSTR, CONNPORT);
} catch (Exception exception) {
exception.printStackTrace();
}
if(!flag)
{
send(Myname+"进入群聊");
flag=true;
}
passDate.setTime(0);
JScrollPane tf = new JScrollPane(area);//为文本域添加滑动条
final JTextField ta = new JTextField();
JFrame jFrame = new JFrame();
JPanel jPanel1 = new JPanel();
jFrame.setLayout(null);
jPanel1.setLayout(null);
JLabel p1Label = new JLabel(Myname+"和他朋友的聊天室");
p1Label.setFont(new Font("宋体", Font.BOLD, 25));
p1Label.setForeground(new Color(0xD753A7D0, true));
p1Label.setBounds(21, 10, 300, 50);
jPanel1.add(p1Label);
jPanel1.setBackground(new Color(250, 250, 250));
jPanel1.setBounds(0, 0, 861, 69);
tf.setBounds(0, 67, 861, 286);
ta.setBounds(0, 356, 861, 150);
ta.requestFocus();//光标聚焦
area.setEditable(false);//聊天区域不可以输入
JPanel jPanel2 = new JPanel();
jPanel2.setLayout(null);
jPanel2.setBounds(0, 285 + 207, 863, 70);
jPanel2.setBackground(new Color(0x285856));
jPanel1.setBackground(new Color(0x285856));
/*发送按钮*/
area.setFont(new Font("宋体", Font.BOLD, 20));
tf.setBackground(Color.CYAN);
ta.setFont(new Font("宋体", Font.BOLD, 18));
JButton SButton = new JButton();
SButton.setIcon(new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\demo02\src\Chart\fs2.png"));
SButton.setBounds(730, 0, 110, 36);
//加个背景
ImageIcon icon = new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\demo03\src\main\img\QQBJ.png");
JLabel QQJlabel = new JLabel(icon);
JLabel qqJlabel = new JLabel(icon);
QQJlabel.setBounds(0,0,877,69);
qqJlabel.setBounds(0,0,877,69);
jPanel2.add(SButton);
jFrame.add(jPanel2);
jFrame.add(tf);
jFrame.add(ta);
jFrame.add(jPanel1);
jFrame.setResizable(false);
jFrame.setBounds(497, 110, 877, 599);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
jFrame.setVisible(true);
ta.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String strSend = ta.getText();
if (strSend.length() == 0) {
return;
}
Date day = new Date();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String time = df.format(day);
System.out.println(time);
if((day.getTime()-passDate.getTime())>60000)
{
passDate=day;
area.append(time + "n");
}
send(Myname+":"+strSend);
ta.setText("");
area.setForeground(Color.BLACK);
}
});
SButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
String strSend = ta.getText();
if (strSend.length() == 0) {//判断是否为空
return;
}
Date day = new Date();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String time = df.format(day);
System.out.println(time);
if((day.getTime()-passDate.getTime())>60000)
{
passDate=day;
area.append(time + "n");
}
ta.setText("");
area.setForeground(Color.BLACK);
}
});
reciver();
}
/**
* 客户端发送信息到服务器上的方法
*/
public void send(String str) {
try {
dataOutputStream = new DataOutputStream(socket.getOutputStream());
dataOutputStream.writeUTF(str);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/*接收服务器传过来的信息*/
public void reciver() {
try {
DataInputStream dataInputStream = new DataInputStream(socket.getInputStream());
while (true) {
String str = dataInputStream.readUTF();
area.append(str + "n");
}
} catch (Exception e) {
e.printStackTrace();
}
}

@Override
public void run() {
init();
}

}

Login.java

package QQChat;

import pojo.People;

import javax.swing.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.*;

public class Login implements Runnable{
void init()
{
/*1、来个框架*/
final JFrame jFrame = new JFrame("登录");
jFrame.setSize(442,589);
jFrame.setLocation(700,200);
/*2、来个面板*/
JPanel jPanel = new JPanel();
jPanel.setSize(jFrame.getWidth(),jFrame.getHeight());
/*3、添加文本框,密码框*/
final JTextField jTextField = new JTextField(15);
final JPasswordField jPasswordField = new JPasswordField(15);
/*4、来个标签,三个一个背景,一个用户名,一个密码*/
JLabel label1 = new JLabel("用户名:");
JLabel label2 = new JLabel("密 码:");
ImageIcon icon = new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\demo03\src\main\img\bj2.png");;
JLabel imgLabel = new JLabel(icon);
imgLabel.setSize(442,589);
label1.setBounds(32,122,45,32);
label2.setBounds(32,156,45,32);
/*5、来个按钮*/
JButton loginButton = new JButton("登陆");
loginButton.setBounds(150,221,100,32);
/*6、加一个注册按钮*/
JButton registerButton = new JButton("注册");
registerButton.setBounds(150,280,100,32);
/*7、加一个修改密码的按钮*/
JButton updateButton = new JButton("修改密码");
updateButton.setBounds(150,339,100,38);
// jPanel.setLayout(null);//不设置布局
jTextField.setBounds(80,128,270,24);
jPasswordField.setBounds(80,162,270,24);
jFrame.add(loginButton);
jFrame.add(registerButton);
jFrame.add(updateButton);
jFrame.add(label1);
jFrame.add(label2);
jFrame.add(imgLabel);
jFrame.add(jTextField);
jFrame.add(jPasswordField);
jFrame.add(jPanel);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);//关闭
jFrame.setResizable(false);
jFrame.setVisible(true);
/*为登录按钮添加监听器*/
loginButton.addMouseListener(new MouseAdapter() {//添加适配器,只需要重写自己想要想要的方法
public void mouseClicked(MouseEvent e) {
//获得文本框的内容

//差一个sql语句用来检验,能否登录成功
People people = null;
String user = jTextField.getText();
String pwd = jPasswordField.getText();
System.out.println("账号"+user);
System.out.println("是否等于空"+user.isEmpty());
System.out.println("密码"+pwd);
String driver = "com.mysql.cj.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/smm?useSSL=true&useUnicode=true&characterEncoding=utf8";
String username = "root";
String paord = "222";
Connection connection = null;
Statement statement = null;
ResultSet resultSet = null;
String sql = "select * from smm.people where people.user='"+user+"' and people.pwd="+pwd;
System.out.println(sql);
try {
Class.forName(driver);
connection = DriverManager.getConnection(url, username, password);
statement = connection.createStatement();

if (jPasswordField.getText().isEmpty()||jTextField.getText().isEmpty())
{
JOptionPane.showMessageDialog(null,"输入不可为空");

}else{
resultSet = statement.executeQuery(sql);
// String hsSql = "select getuser('"+user+"','"+pwd+"');";
// System.out.println(hsSql);
// CallableStatement cs = connection.prepareCall(hsSql, Types.INTEGER, 0);
// cs.execute();

if (resultSet==null)
{
System.out.println("resultSet空的");
}
if(resultSet.next())
{
int userPort = resultSet.getInt("port");
JOptionPane.showMessageDialog(null,"登录成功");
jFrame.setVisible(false);
new Thread(new Screen(user,userPort)).start();

}else{
JOptionPane.showMessageDialog(null,"用户名或者密码不正确");
}
}

} catch (Exception exception) {
exception.printStackTrace();
}

}
});
registerButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
//跳转到点击类
jFrame.setVisible(false);
new Register().init();
}
});
updateButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
//调转到修改密码类
System.out.println("点击了修改密码");
jFrame.setVisible(false);
new ChangePwd().init();
}
});
}


@Override
public void run() {
init();
}
}

Register.java

package QQChat;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class Register {
public void init()
{
final JFrame jFrame = new JFrame("注册");
jFrame.setSize(442,589);
jFrame.setLocation(700,200);
/*2、来个面板*/
JPanel jPanel = new JPanel();
jPanel.setSize(jFrame.getWidth(),jFrame.getHeight());
/*3、添加文本框,密码框*/
final JTextField jTextField = new JTextField(15);
final JPasswordField jPasswordField = new JPasswordField(15);
final JPasswordField reJPasswordField = new JPasswordField(15);
final JTextField portJPasswordField = new JTextField(15);
/*4、来个标签,三个一个背景,一个用户名,一个密码*/
JLabel label1 = new JLabel("用户名:");
label1.setForeground(new Color(0x0E8DCE));
JLabel label2 = new JLabel("密 码:");
label2.setForeground(new Color(0x060D11));
JLabel label3 = new JLabel("确认:");
label3.setForeground(new Color(0x07EABD));
JLabel label4 = new JLabel("端口:");
label4.setForeground(new Color(0x6820EF));
ImageIcon icon = new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\ComeToChat\src\main\img\bj3.png");;
JLabel imgLabel = new JLabel(icon);
imgLabel.setSize(442,589);
label1.setBounds(32,122,45,32);
label2.setBounds(32,156,45,32);
label3.setBounds(32,190,45,32);
label4.setBounds(32,224,45,32);
/*6、加一个注册按钮*/
JButton registerButton = new JButton("注册");
registerButton.setBounds(150,280,100,32);
/*7、加一个修改密码的按钮*/
jTextField.setBounds(80,128,270,24);
jPasswordField.setBounds(80,162,270,24);
reJPasswordField.setBounds(80,196,270,24);
portJPasswordField.setBounds(80,230,270,24);
jFrame.add(registerButton);
jFrame.add(label1);
jFrame.add(label2);
jFrame.add(label3);
jFrame.add(label4);
jFrame.add(imgLabel);
jFrame.add(jTextField);
jFrame.add(jPasswordField);
jFrame.add(reJPasswordField);
jFrame.add(portJPasswordField);
jFrame.add(jPanel);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);//关闭
jFrame.setResizable(false);
jFrame.setVisible(true);
registerButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if(portJPasswordField.getText().isEmpty()||jTextField.getText().isEmpty()||jPasswordField.getText().isEmpty()||reJPasswordField.getText().isEmpty())
{
JOptionPane.showMessageDialog(null,"输入不可为空");
}else{
String user = jTextField.getText();
String p1 = jPasswordField.getText();
String p2 = reJPasswordField.getText();
String port = portJPasswordField.getText();
if(!p1.equals(p2))
{
JOptionPane.showMessageDialog(null,"两次密码输入不一致");
}else{
/*1、需要查询用户名是否重复*/
/*2、插入*/
String driver = "com.mysql.cj.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/smm?useSSL=true&useUnicode=true&characterEncoding=utf8";
String username = "root";
String pass = "2";
Connection connection = null;
Statement statement = null;
ResultSet resultSet = null;
String userSql = "select * from smm.people where people.user='"+user+"';";//查看user是否重复了
String portSql = "select * from smm.people where people.port='"+port+"';";//查看port是否重复了
String intoPeople = "insert into smm.people(user,pwd,port) values("+"'"+user+"'"+",'"+p1+"',"+"'"+port+"');";
String intoUserport = "insert into smm.userport(user,usedport,friendhost,friend,port) values("+"'"+user+"',"+1234+","+port+","+"'fx'"+","+4321+");";
String intoUserport2 = "insert into smm.userport(user,usedport,friendhost,friend,port) values("+"'fx'"+","+1234+","+4321+","+"'"+user+"',"+port+");";
System.out.println(intoPeople);
System.out.println(intoUserport);
try {
Class.forName(driver);
connection = DriverManager.getConnection(url, username, password);
statement = connection.createStatement();
if (jPasswordField.getText().isEmpty()||jTextField.getText().isEmpty())
{
JOptionPane.showMessageDialog(null,"输入不可为空");

}else{
resultSet = statement.executeQuery(userSql);
if(resultSet.next())
{

JOptionPane.showMessageDialog(null,"用户名已经存在");
}else{
resultSet = statement.executeQuery(portSql);
if(resultSet.next())
{
JOptionPane.showMessageDialog(null,"端口号已经存在");
}else{
statement.execute(intoPeople);
statement.execute(intoUserport);
System.out.println(intoUserport2);
statement.execute(intoUserport2);
JOptionPane.showMessageDialog(null,"注册成功");
jFrame.setVisible(false);
new Login().init();
}
}
}

} catch (Exception exception) {
exception.printStackTrace();
}
}
}
}
});
}

// public static void main(String[] args) {
// new Register().init();
// }
}

Screen.java

package QQChat;
import QQChat.ClientChat;
import QQChat.Login;
import QQChat.WeChat;
import sun.management.snmp.jvmmib.JvmRTInputArgsEntryMBean;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.*;
import java.util.Vector;

/*搞个界面*/
public class Screen implements Runnable{


public static String username;
public static int userPort;
static Vector<String> vector = new Vector<String>();
public Screen(String username,int userPort) {
this.username = username;//获得用户名
this.userPort = userPort;
}
static Connection connection = null;
static Statement statement = null;
static ResultSet resultSet = null;
public void init() throws Exception {
String driver = "com.mysql.cj.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/smm?useSSL=true&useUnicode=true&characterEncoding=utf8";
String user = "root";
String pass = "2";
String sql = "select * from userport where userport.user='"+username+"'";
System.out.println(sql);
Class.forName(driver);
int l=0;
int height = 0;//用于动态管理滚动条
try {
connection = DriverManager.getConnection(url, user, password);
statement = connection.createStatement();
resultSet = statement.executeQuery(sql);
while(resultSet.next())
{
l++;
System.out.println(resultSet.getString("friend"));
vector.add(resultSet.getString("friend"));
}
} catch (SQLException throwables) {
throwables.printStackTrace();
}
if(l>8)
{
height = 503;
}else{
height = l*60;
}
int x = 0;
double row=3.9;
final JFrame jFrame = new JFrame("Main Screen");
JPanel jPanel = new JPanel();
jPanel.setSize(358,800);
jFrame.setLayout(null);
jPanel.setBackground(Color.white);
jFrame.setBackground(Color.white);
/*1、加个头像标签*/
ImageIcon icon = new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\ComeToChat\src\main\img\lyf.png");
JLabel txLabel = new JLabel(icon);
/*2、好友的标签*/
JLabel friendLabel = new JLabel("我的好友");
friendLabel.setFont(new Font("宋体",Font.BOLD,20));
friendLabel.setBounds(20,113,100,50);
/*加个用户名的标签*/
JLabel userLabel = new JLabel(username);
userLabel.setBounds(73,36,73,36);
userLabel.setFont(new Font("宋体",Font.BOLD,18));
/*增加一个添加好友的功能*/
ImageIcon addicon = new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\ComeToChat\src\main\img\添加.png");
JButton addBtn = new JButton(addicon);
addBtn.setBounds(255,113,31,31);
ImageIcon messageIcon = new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\ComeToChat\src\main\img\message.png");
JButton messageBtn = new JButton(messageIcon);
messageBtn.setBounds(290,113,31,31);
/*3、写个下拉框*/
JButton jButton = new JButton("一起聊天");
jButton.setIcon(new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\demo03\src\main\img\tx.png"));
jButton.setBounds(20,162,315,62);
jFrame.add(jButton);
JButton[] jbutton = new JButton[100];
//4、写个背景图片
ImageIcon icon1 = new ImageIcon("D:\Maven\JavaWeb\feng.javaweb.cookie\demo03\src\main\img\mainBj.png");
JLabel jLabel = new JLabel(icon1);
JTextPane area = new JTextPane();
JTextArea area1 = new JTextArea((int) (l*row),10);
System.out.println(area1.getRows());
JScrollPane tf = new JScrollPane(area1);//为文本域添加滑动条
/*5、写个删除按钮*/
final String deteleL = "注销";
JButton deleteBtn= new JButton(deteleL);
deleteBtn.setFont(new Font("宋体",Font.BOLD,10));
deleteBtn.setBounds(200,28,60,50);


tf.setBackground(Color.white);
tf.setBounds(20,220,315,height);
area1.setLayout(null);
area1.setBounds(0,0,315,height);
// tf.setLayout(null);
if (!vector.isEmpty())
{
int y=-63;
for (String s : vector) {
y+=63;
jbutton[x] = new JButton(s);
jbutton[x].setBounds(0,y,315,62);
area1.add(jbutton[x++]);
}
}else{
System.out.println("空的");
}
jFrame.add(tf);
jFrame.add(addBtn);
jFrame.add(messageBtn);
jFrame.add(friendLabel);
jFrame.add(userLabel);
jFrame.add(txLabel);
txLabel.setBounds(8,28,40,51);
jFrame.setSize(358,800);
jPanel.add(jLabel);
jFrame.add(deleteBtn);
jFrame.add(jPanel);
jLabel.setBounds(-20,0,378,800);
jFrame.setLocation(1500,50);
jFrame.setResizable(false);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
jFrame.setVisible(true);
jButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
/*这个地方要跳连接了*/
System.out.println("调转到这");
new Thread(new ClientChat(username)).start();
}
});
for(int i=0;i<x;i++)
{
final String s = vector.elementAt(i);
jbutton[i].addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {

String sql = "select * from smm.userport where user='"+username+"' and friend= '"+s+"';";
try {
ResultSet resultSet = statement.executeQuery(sql);
System.out.println(sql);
int usedport = 0;
int friendhost = 0;
String friend = null;
int port = 0;
while(resultSet.next())
{
usedport = resultSet.getInt("usedport");
friendhost = resultSet.getInt("friendhost");
friend = resultSet.getString("friend");
// port = resultSet.getInt("port");
}
String call = "{call check_port_username(?,?,?)}";
CallableStatement cs = connection.prepareCall("{call check_port_usernameTwo(?,?,?)};");
cs.setString(1,username);
cs.setString(2,friend);
cs.registerOutParameter(3,Types.INTEGER);
// System.out.println(cs.toString());
// cs.registerOutParameter(3, Types.INTEGER);
cs.execute();
System.out.println();
port = cs.getInt(3);
System.out.println(port);
new Thread(new WeChat(usedport,"localhost",friendhost,port,friend)).start();
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
});


}
deleteBtn.addMouseListener(new MouseAdapter() {
int deleteI = 0;
@Override
public void mouseClicked(MouseEvent e) {
// System.out.println(e.getClickCount());
if(e.getClickCount()==2)
{
System.out.println("销毁了");
String sql = "delete from smm.userport where user="+"'"+username+"' or friend ="+"'"+username+"';";
String sql2 = "delete from smm.people where user ='"+username+"';";
System.out.println(sql);
System.out.println(sql2);
try {
statement.execute(sql);
statement.execute(sql2);
} catch (Exception throwables) {
throwables.printStackTrace();
}
JOptionPane.showMessageDialog(null,"销毁成功");
jFrame.setVisible(false);
new Thread(new Login()).start();

}
}
});
addBtn.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
new Thread(new AddUser(username,userPort)).start();
}
});
messageBtn.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
try {
new Thread(new Examine(username,userPort)).start();
} catch (Exception classNotFoundException) {
classNotFoundException.printStackTrace();
}
}
});
}

@Override
public void run() {
try {
init();
} catch (Exception exception) {
exception.printStackTrace();
}
}
}

ServerChat2.java

package QQChat;

import javax.swing.*;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Iterator;


public class ServerChat2 {
public static void main(String[] args) {
new ServerChat2().Start();
}
//端口
//预留出来8890-9000给服务器端口
private static final int PORT = 1111;
//ServerSocket
private ServerSocket serverSocket = null;
private Socket socket = null;

//Server接受数据
private DataInputStream dataInputStream = null;

// 多个客户端访问时,客户端对象存放入List中
private ArrayList<ClientCoon> ccList = new ArrayList<ClientCoon>();

// 服务器启动的标志 (其实ServerSocket ss 初始化出来时以为者服务器的启动)
private boolean isStart = true;
public void Start()
{
try {
new ServerChat2().startServer();
} catch (Exception exception) {
exception.printStackTrace();
}
}



public void startServer() throws Exception {
try {
try {
serverSocket = new ServerSocket(PORT);
System.out.println("连接成功");
isStart = true;
} catch (Exception e) {
e.printStackTrace();
}
// 可以接受多个客户端的连接
// 接每一個信息时,服务器不可以终断,所以将其写入while()中,判断符为服务器开关的判断符
while (isStart) {
socket = serverSocket.accept();
ccList.add(new ClientCoon(socket));
System.out.println("线程池的大小是:"+ccList.size());

}

} catch (SocketException e) {
System.out.println("服务器终断了!!!");
} catch (Exception e) {
e.printStackTrace();
}
}

class ClientCoon implements Runnable {

Socket socket = null;
public ClientCoon(Socket socket) {
this.socket = socket;
new Thread(this).start();
}

//接受客户端信息(多线程run()方法)
@Override
public void run() {
try {
DataInputStream dataInputStream = new DataInputStream(socket.getInputStream());
while (isStart) {
String str = dataInputStream.readUTF();
Iterator<ClientCoon> iterator = ccList.iterator();
while (iterator.hasNext()) {
ClientCoon clientCoon = iterator.next();
clientCoon.send(str);
}
}
}catch (Exception e) {
e.printStackTrace();
}
}
// 服务器向每個连接对象发送数据的方法
public void send(String str) {
try {
DataOutputStream dataOutputStream = new DataOutputStream(this.socket.getOutputStream());//建立连接了。可以发出去
dataOutputStream.writeUTF(str);
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

3、多线程

下面的代码复制粘贴几次,即代表启动几个
test.java

package QQChat;

import sun.rmi.runtime.Log;

public class test {
public static void main(String[] args) {
new Login().init();
}
}

总结

大二的时候写的一个项目,由于网上没有相应的资源,加上自己写的还比较详细,所以获得了专业前三的课设成绩。这个课设写的也不算久,一个星期这样子,但是对于整个JAVA课程的巩固起到了非常大的作用,以至于即使我近半年的时间没有摸java语言,但是其中是思想我还是掌握到了的。所以把这个项目放到C站上,为大家的学习提供一个方便

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