这个程序时大一是跟着教学课堂做的，做的有点 low，在学校的局域网内聊天玩的，也可以穿文件（这个当时太懒了，就没有加），拿来分享一下。

第一节 客户端登录界面

不知道为什么就客户端登录界面的注释乱码了 ~~~ 扎心

import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import com.angelfate.tools.FileUtils;

/**
 * 
 * @Project: chatClient /ClientLogin.java/com.angelfate.ui
 * @Description:企业级聊天登录界面：客户端登录界面
 * @author 10406
 * @date 2018年4月15日 上午10:08:40
 * @company AngelFate
 * @return ClientLogin
 */
public class ClientLogin extends JFrame{
	private ImageIcon loginLogo = null;  // 瀹氫箟涓�涓� 鍥剧墖缁勪欢 绌哄��
	private JLabel showLogoLabel = null;
	private int width =735,height = 550; // 鍥犱负绐楀彛涓�鏍峰ぇ鏈夎竟绾匡紝鎵�浠� 杩欓噷 璁剧疆澶т竴鐐�
	private JLabel userJLabel = null,pwdLabel = null;
	private JTextField usernameText = null;
	private JPasswordField pwdText = null;
	private JButton loginBtn = null,restBtn = null;
	private JLabel banquan1 = null,banquan2 = null;
	/** 
	 * 璋冪敤鏂规硶
	 */
	private ClientLogin(){
		init();
		addCompoent();
		addListener();
		showFrame();
	}
	
	/**
	 * @Descripition:鍒濆鍖栫粍浠堵�
	 */
	private void init() {
		loginLogo =  new ImageIcon(this.getClass().getResource("/images/Logo.png")); // 鍒濆鍖栧浘鐗�
		showLogoLabel = new JLabel(loginLogo,JLabel.CENTER); // 鍒濆鍖� JLabel 锛屽苟涓旀妸鍥剧墖鏀惧叆JLabel
		/*鍒濆鍖栧墿浣欑粍浠�*/
		userJLabel = new JLabel("用户名：");
		pwdLabel = new JLabel("密    码：");
		usernameText = new JTextField();
		pwdText = new JPasswordField();
		loginBtn = new JButton(" 登  录 ");
		restBtn = new JButton(" 重  置 ");
		banquan1 = new JLabel("Copyright © 2018 AngelFate. All Rights Reserved.");
		banquan2 = new JLabel("AngelFate公司 版权所有.");
	}
	
	/**
	 * 鎶婂悇绉嶇粍浠跺湪璇ユ柟娉曚腑缁勮
	 */
	private void addCompoent() {
		this.setLayout(null); // 璁剧疆瀹瑰櫒鐨勫竷灞�涓虹┖锛屽嵆娓呴櫎榛樿甯冨眬
		this.add(showLogoLabel); // 鎶婄粍浠秙howLogoLabel娣诲姞鍒板鍣�
		showLogoLabel.setBounds(0, 0,width-10,173);
		
		this.add(userJLabel);
		userJLabel.setBounds(200, 200,80,30); // 瀹氫綅锛歺锛寉锛屽锛岄珮
		userJLabel.setForeground(Color.green); // 瀛椾綋棰滆壊
		userJLabel.setFont(new Font("",1,17)); // 瀛椾綋澶у皬
		
		this.add(usernameText);
		usernameText.setBounds(270,200,200,35);
		
		this.add(pwdLabel);
		pwdLabel.setBounds(200,260,80,30);
		pwdLabel.setForeground(Color.green); 
		pwdLabel.setFont(new Font("",1,17)); 
		
		this.add(pwdText);
		pwdText.setBounds(270, 260,200,35);
		
		this.add(loginBtn);
		loginBtn.setBounds(230, 330,120,40);
		loginBtn.setForeground(Color.orange); 
		loginBtn.setFont(new Font("黑体",Font.BOLD,19)); 
		
		this.add(restBtn);
		restBtn.setBounds(360, 330,120,40);
		restBtn.setForeground(Color.orange); 
		restBtn.setFont(new Font("黑体",Font.BOLD,19)); 
		
		this.add(banquan1);  // 鐗堟潈
		banquan1.setBounds(170, 420,550,30);
		banquan1.setFont(new Font("宋体",Font.BOLD,13));
		this.add(banquan2);
		banquan2.setBounds(290, 450,500,30);
		banquan2.setFont(new Font("宋体",Font.BOLD,13));
	}

	/**
	 * 缁欑粍浠舵坊鍔犲姛鑳斤紙浜嬩欢锛�
	 */
	private void addListener() {
		// 绐楀彛鍏抽棴浜嬩欢
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
		//缁欑櫥褰曟寜閽坊鍔犱簨浠�
		loginBtn.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				String username = usernameText.getText(); // 鑾峰彇鐢ㄦ埛鍚嶆枃鏈鐨勫��
				String pwd =pwdText.getText(); // 鑾峰彇pwdText鏂囨湰妗嗙殑鍊�
				boolean b = FileUtils.checkLogin(username, pwd); // 鏌ョ湅鐢ㄦ埛鏄惁鐧诲綍鎴愬姛
				// 瀵� username 杩涜闀垮害鍒ゆ柇锛岃鍔熻兘绠�鍗�
				if(b == true) { // 鐧婚檰鎴愬姛锛屾垚鍔熶箣鍚庯紝璺冲線鑱婂ぉ鐣岄潰
					JOptionPane.showMessageDialog(null,  "登陆成功");	
					new ChatClientUI(username); // 鏄剧ず鑱婂ぉ鐣岄潰
					ClientLogin.this.dispose(); // 鍏抽棴鐧诲綍绐楀彛
					
				}else { // 鐧诲綍澶辫触
					//寮瑰嚭娑堟伅瀵硅瘽妗�
					JOptionPane.showMessageDialog(null,"用户名或者密码错误！");
				}
					
			}
			
		});
		
		//缁欓噸缃寜閽坊鍔犱簨浠�
		restBtn.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {  // 娓呯┖涓や釜鏂囨湰妗�
				usernameText.setText("");
				pwdText.setText("");
				
			}
			
		});
	}
	
	/**
	 * 鏄剧ず绐楀彛
	 */
	private void showFrame() {
		
		/*璁╃獥鍙ｄ粠灞忓箷涓棿寮瑰嚭*/
		int screenWidth = (int)this.getToolkit().getScreenSize().getWidth(); //鑾峰彇灞忓箷瀹藉害
		int screenHeight = (int)this.getToolkit().getScreenSize().getHeight();//鑾峰彇灞忓箷楂樺害
		int x = (screenWidth-width)/2;  // 璁剧疆寮瑰嚭瀹藉害鍧愭爣
		int y = (screenHeight-height)/2;
		this.setLocation(x, y);
		
		this.setSize(width, height);
		this.setTitle("企业级聊天登录界面：客户端登录界面");
		this.setVisible(true);
		this.setResizable(false); // 绂佹绐楀彛缂╂斁
	}
	
	
	public static void main(String[] args) {
		new ClientLogin();
	}
}

完整效果：

logo来自我微信公众号：angelfate的

客户端：

服务器端：

聊天界面

剩余代码较多，慢慢补齐