IM需求
今天我们开始了IM项目的开发，以此作为我们近阶段学习的一次综合性的实践。
项目需求如下：
由于之前SVN项目我是负责项目后台逻辑处理，于是这次我想尝试前台UI设计。在经过今晚近三个多小时的奋斗，我也查漏补缺了不少知识点，在此总结一下：
知识点总结
1.
//去掉窗口装饰 this.setUndecorated(true);
2.
JComboBox jcb = new JComboBox(); jcb.setEditable(true); jcb.setBounds(new Rectangle(260, 75, 240, 35));
这是JComboBox
写
getSelectedItem()
setSelectedItem(String str)
3.
JLabel jl3 = new JLabel("注册");
jl3.setBounds(new Rectangle(100, 188, 190, 35));
jl3.setFont(new Font("Dialog", 1, 15));
jl3.setForeground(Color.blue);
4.
设置窗口最小化
setState(Frame.ICONIFIED);
设置程序关闭
System.exit(0);
用于自定义最小化和关闭按钮，DIY是件很酷的事情哦！
5.
// 将图片加载到JLabel上
JLabel label_background = new JLabel(new ImageIcon("image/2.jpg"));
label_background.setBounds(0, 0, this.getWidth(), this.getHeight());
// 相当于将JLabel贴在第二层面板的底层
this.getLayeredPane().add(label_background, new Integer(Integer.MIN_VALUE));
// JComponent是JPanel的父类，用于拿到窗口的第一层面板
JComponent jc = (JComponent) this.getContentPane();
// 设置第一层面板透明化
jc.setOpaque(false);
源代码分享
view包结构
这是我的view包的结构，其中chat是聊天界面类，listener是监听器类，main是主窗口类，也就是类似QQ的好友列表窗口，start是一开始的登录和注册界面。（希望能学到更规范的命名方法）
StartFrame
package view.start;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import view.listener.MyActionListener;
import view.listener.MyMouseAdapter;
public class StartFrame extends JFrame {
public static StartFrame sf;
public static void main(String[] args) {
sf = new StartFrame();
}
public StartFrame() {
initStartFrame();
}
private void initStartFrame() {
this.setSize(550, 280);
this.setLocationRelativeTo(null);
this.setResizable(false);
this.setLayout(null);
this.setDefaultCloseOperation(3);
// 去掉窗口装饰
this.setUndecorated(true);
JLabel jl1 = new JLabel("用户名");
jl1.setBounds(new Rectangle(200, 65, 50, 50));
JComboBox jcb = new JComboBox();
jcb.setEditable(true);
jcb.setBounds(new Rectangle(260, 75, 240, 35));
JLabel jl2 = new JLabel("密 码");
jl2.setBounds(new Rectangle(200, 120, 50, 50));
JPasswordField jpf = new JPasswordField(18);
jpf.setBounds(new Rectangle(260, 130, 240, 35));
JButton jb1 = new JButton("登录");
jb1.setBounds(new Rectangle(260, 187, 240, 35));
JLabel jl3 = new JLabel("注册");
jl3.setBounds(new Rectangle(100, 188, 190, 35));
jl3.setFont(new Font("Dialog", 1, 15));
jl3.setForeground(Color.blue);
MyMouseAdapter mma = new MyMouseAdapter(jcb, jpf);
jl3.addMouseListener(mma);
// 添加图片
JPanel jp = new JPanel();
jp.setBounds(new Rectangle(70, 75, 88, 88));
jp.setBackground(Color.white);
// 缩小按钮
JButton button_narrow = new JButton("narrow");
button_narrow.setBounds(new Rectangle(450, 0, 50, 35));
// 关闭按钮
JButton button_close = new JButton("close");
button_close.setBounds(new Rectangle(500, 0, 50, 35));
MyActionListener mal = new MyActionListener(jcb, jpf);
jb1.addActionListener(mal);
button_close.addActionListener(mal);
button_narrow.addActionListener(mal);
// 将图片加载到JLabel上
JLabel label_background = new JLabel(new ImageIcon("image/2.jpg"));
label_background.setBounds(0, 0, this.getWidth(), this.getHeight());
// 相当于将JLabel贴在第二层面板的底层
this.getLayeredPane().add(label_background, new Integer(Integer.MIN_VALUE));
// JComponent是JPanel的父类，用于拿到窗口的第一层面板
JComponent jc = (JComponent) this.getContentPane();
// 设置第一层面板透明化
jc.setOpaque(false);
this.add(button_narrow);
this.add(button_close);
this.add(jp);
this.add(jl1);
this.add(jcb);
this.add(jl2);
this.add(jpf);
this.add(jb1);
this.add(jl3);
this.setVisible(true);
}
}
MyActionListener
package view.listener;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import view.start.StartFrame;
public class MyActionListener implements ActionListener {
private JComboBox jcb;
private JPasswordField jpf;
public MyActionListener(JComboBox jcb, JPasswordField jpf) {
this.jcb = jcb;
this.jpf = jpf;
}
public void actionPerformed(ActionEvent e) {
JButton jb = (JButton) e.getSource();
String type = jb.getText();
// 获得用户名和密码
String name = (String) jcb.getSelectedItem();
String psd = jpf.getText();
switch (type) {
case "登录":
// TODO 登录操作
System.out.println("login" + name + psd);
// StartFrame.sf.setVisible(false);
break;
case"narrow":
StartFrame.sf.setState(Frame.ICONIFIED);
break;
case"close":
System.exit(0);
break;
}
jcb.setSelectedItem("");
jpf.setText("");
}
}
MyMouseListener
package view.listener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JComboBox;
import javax.swing.JPasswordField;
import view.start.StartFrame;
public class MyMouseAdapter extends MouseAdapter {
private JComboBox jcb;
private JPasswordField jpf;
public MyMouseAdapter(JComboBox jcb, JPasswordField jpf) {
this.jcb = jcb;
this.jpf = jpf;
}
public void mouseClicked(MouseEvent e) {
// 获得用户名和密码
String name = (String) jcb.getSelectedItem();
String psd = jpf.getText();
// TODO 注册操作
System.out.println("register" + name + psd);
// StartFrame.sf.setVisible(false);
}
}
运行结果（登录和注册界面）
自我感觉
界面还是个雏形，肯定需要更进一步的完善（swing原配太丑了。。。）随着项目的推进，最后希望能够呈现一个比较好的效果，今晚出了做这个界面，还有复习了以前的一些知识点。三个小时如白马过隙，总算明白程序员为什么总是熬夜，原来是代码敲着敲着，兴趣来了，停不下来了吧。（听说大多数情况是为了赶项目。。。我毕竟太年轻。。。）
时间： 2025-01-05 19:51:20