teachermanageframe.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.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
///这是一个教师信息系统的入口框架类。
///teacherframe是顶层窗口框架。
///通过三个个按钮控件来分别可以进入不同系的教师信息系统中。
///三个按钮控件分别产生三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 teachermanageframe extends JPanel
{
    private static final long serialVersionUID = 1L;
    static final int WIDTH=400;
    static final int HEIGHT=200;
    JFrame teacherframe;
    public teachermanageframe() 
    {
        teacherframe=new JFrame();   
        teacherframe.setTitle("教师信息管理系统");
        teacherframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        teacherframe.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;
        teacherframe.setLocation(x,y);
        teacherframe.setVisible(true);
        teacherframe.setResizable(false);
        teacherframe.add(this, BorderLayout.CENTER);
        JButton computerteacher=new JButton("计算机系教师信息系统");
        JButton bioteacher=new JButton("生 物 系教师信息系统");
        JButton mechteacher=new JButton("机械系教师信息系统");
        JButton beretun=new JButton("返回");
        JLabel title=new JLabel("教师信息系统主界面");
        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=1;
        constraints.weighty=4;
        JPanel jp=new JPanel();
        jp.setLayout(new GridLayout(1,3));
        jp.add(banket1);
        jp.add(title);
        jp.add(banket2);
        teacherframe.add(jp,BorderLayout.NORTH);
        add(computerteacher,constraints,0,1,1,1);                 //使用网格组布局添加控件        
        add(bioteacher,constraints,0,4,1,1);
        add(mechteacher,constraints,1,1,1,1);
///单击这个按钮，进入到计算机系教师信息系统
        computerteacher.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent Event) 
            {
                String sql="select * from teacherinfo where duty='教师'and major='计算机系'";
                teacherinfo teacherinformation=new teacherinfo("计算机系教师信息系统",sql);
                  
            }
        });
///单击这个按钮，进入到生物系教师信息系统
        bioteacher.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent Event) 
            {
                String sql="select * from teacherinfo where duty='教师'and major='生物系'";
                teacherinfo teacherinformation=new teacherinfo("生物系教师信息系统",sql);
            }
        });
///单击这个按钮，进入到机械系教师信息系统
        mechteacher.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent Event) 
            {
                String sql="select * from teacherinfo where duty='教师'and major='机械系'";
                teacherinfo teacherinformation=new teacherinfo("机械系教师信息系统",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);
    }             
}