leadermanageframe.java

学习java编程的好程序

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
///这是一个领导信息系统的入口框架类。
///leaderframe是顶层窗口框架。
///通过四个按钮控件来分别可以进入到不同职务、不同系的信息系统中。
///四个按钮控件分别产生四个不同的动作事件简史事件，分别进入不同的信息系统。
///在布局方面有两个布局管理器，一个是lay即网格组布局。一个是jp是GridLayout布局。
///通过不同的SQL语句进入不同的班级和系的管理系统。
class leadermanageframe extends JPanel
{
    private static final long serialVersionUID = 1L;
    static final int WIDTH=400;
    static final int HEIGHT=200;
    JFrame leaderframe;
    public leadermanageframe() {
    leaderframe=new JFrame();   
    leaderframe.setTitle("领导信息管理系统");
    leaderframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    leaderframe.setSize(WIDTH,HEIGHT);
    Toolkit kit=Toolkit.getDefaultToolkit();
    Dimension screenSize=kit.getScreenSize();
    int width=screenSize.width;
    int height=screenSize.height;
    int x=(width-WIDTH)/2;
    int y=(height-HEIGHT)/2;
    leaderframe.setLocation(x,y);
    leaderframe.setVisible(true);
    leaderframe.setResizable(false);
    leaderframe.add(this, BorderLayout.CENTER);
    JButton computerleader=new JButton("计算机系领导信息系统");
    JButton bioleader=new JButton("生 物 系领导信息系统");
    JButton mechleader=new JButton("机械系领导信息系统");
    JButton schoolleader=new JButton("学校领导信息系统");   
    JLabel title=new JLabel("领导信息系统主界面");
    JLabel banket1=new JLabel();
    JLabel banket2=new JLabel();
    GridBagLayout lay=new GridBagLayout();  
    setLayout(lay);  
    GridBagConstraints constraints=new GridBagConstraints();
    constraints.fill=GridBagConstraints.NONE;
    constraints.anchor=GridBagConstraints.EAST;
    constraints.weightx=2;
    constraints.weighty=2;
    JPanel jp=new JPanel();
    jp.setLayout(new GridLayout(1,3));
    jp.add(banket1);
    jp.add(title);
    jp.add(banket2);
    leaderframe.add(jp,BorderLayout.NORTH);
    add(computerleader,constraints,0,0,1,1);                 //使用网格组布局添加控件         
    add(bioleader,constraints,0,1,1,1);
    add(mechleader,constraints,1,0,1,1);
add(schoolleader,constraints,1,1,1,1);
///单击这个按钮，进入到计算机系领导信息系统
    computerleader.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent Event) 
        {
            String sql="select * from teacherinfo where duty<>'教师'and major='计算机系'";
            leaderinfo leaderinformation=new leaderinfo("计算机系领导信息系统",sql);
                  
        }
});
///单击这个按钮，进入到生物系领导信息系统
    bioleader.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent Event) 
        {
            String sql="select * from teacherinfo where duty<>'教师' and major='生物系'";
            leaderinfo leaderinformation=new leaderinfo("生物系领导信息系统",sql);                  
        }
});
///单击这个按钮，进入到机械系领导信息系统
    mechleader.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent Event) 
        {
            String sql="select * from teacherinfo where duty<>'教师'and major='机械系'";
            leaderinfo leaderinformation=new leaderinfo("机械系领导信息系统",sql);
                  
        }
});
///单击这个按钮，进入到学校领导信息系统
    schoolleader.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent Event) 
        {
            String sql="select * from teacherinfo where duty<>'教师'and major='学校'";
            leaderinfo leaderinformation=new leaderinfo("学校领导信息系统",sql);
                  
        }
    });
    }
    public void add(Component c,GridBagConstraints constraints,int x,int y,int w,int h)
    {
        constraints.gridx=x;
        constraints.gridy=y;
        constraints.gridwidth=w;
        constraints.gridheight=h;
        add(c,constraints);
    }             
}