xueshenggaimi.java

学生成绩管理系统可以查询修改成绩 修改密码 删除填加成绩

package don;

import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.ResultSet;

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 java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class xueshenggaimi implements ActionListener
{
	JFrame fxgmm = new JFrame("修改密码");	
    JLabel l0=new JLabel("输入学号:");
    JLabel l1 = new JLabel("输入旧密码:");
    JLabel l2 = new JLabel("输入新密码:");
    JLabel l3 = new JLabel("确认新密码:");
	JTextField t0=new JTextField(30);
	JPasswordField t1=new JPasswordField(30);
	JPasswordField t2=new JPasswordField(30);
	JPasswordField t3=new JPasswordField(30);
	JButton b1=new JButton("修改");
	JButton b2=new JButton("取消");
	
	public xueshenggaimi()
	{	
		//fxgmm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		fxgmm.setSize(400, 350);
		fxgmm.setResizable(true);	
	
		fxgmm.setLayout(null);
		l0.setBounds(60, 30, 100, 30);
        l1.setBounds(60, 70, 100, 30);
        l2.setBounds(60, 120, 100, 30);
        l3.setBounds(60, 170, 100, 30);
        t0.setBounds(150, 30, 100, 25);
        t1.setBounds(150, 70, 100, 25);
        t2.setBounds(150, 120, 100, 25);
        t3.setBounds(150, 170, 100, 25);
        b1.setBounds(60, 220, 100,30);
        b2.setBounds(200, 220, 100,30);
        fxgmm.add(l0);
        fxgmm.add(t0);
        fxgmm.add(l1);
        fxgmm.add(t1);
        fxgmm.add(l2);
        fxgmm.add(t2);
        fxgmm.add(l3);
        fxgmm.add(t3);
        fxgmm.add(b1);
        fxgmm.add(b2);
        
        fxgmm.setVisible(true);
        b2.addActionListener(this);

        b1.addActionListener
        (new ActionListener()
        {        	
        	public void actionPerformed(ActionEvent e)
        	{
        		//System.out.println("wwwwww");
            	final String a;
            	final String b;
            	final String c;
            	final String d;
        		a=t0.getText();
            	b=t1.getText();
            	c=t2.getText().trim();
            	d=t3.getText().trim();
        	String message="学号或原密码输入有误!";
        	DBSource db=new DBSource();
        	
        	String sql="select * from geren where sno='" + a + "' and smima='" + b + "'";
        	System.out.println(sql);
    		ResultSet rs1=db.executeQuery(sql);
    		
	    		try {
					if(rs1.next()){
						//检测新密码
						if(!c.equals(d)){
							JOptionPane.showMessageDialog(fxgmm,"两次密码不一致，请重新输入！");
							return;
						}//否则修改密码
						else{
							DBSource db1=new DBSource();
							String sql1="update geren set smima='" + c + "' where sno='" + a + "'";
							System.out.println(sql1);
							boolean bb=db1.execute(sql1);
							
							if(bb){
								JOptionPane.showMessageDialog(fxgmm,"密码修改成功！");
							}
						}
					}else{
						JOptionPane.showMessageDialog(fxgmm,message);
						return;
					}
					
				}
	    		catch (HeadlessException e1)
				{
					e1.printStackTrace();
				} 
				catch (SQLException e1)
				{
					e1.printStackTrace();
				}
    		
        	}
        });
        	
        
	}
	

	public void actionPerformed(ActionEvent e)
	{
		if(e.getSource()==b2)
		{
			//System.exit(0);
			fxgmm.setVisible(false);
		}
		
	}
	public static void main(String args[]) 
	{
		new xueshenggaimi();
	}
	
}