《数据库应用》
课程设计——人事管理系统(java
源代码)
//用户登陆类
package classsource;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
public class Land extends JFrame{
JFrame jf ;
JTextField textName=new JTextField();
JPasswordField textage=new JPasswordField();
JLabel label = new JLabel("员工
管理系统");
JLabel labelName=new JLabel("用户名:");
JLabel labelage=new JLabel("密码:");
JButton buttonEnter=new JButton("登录");
JButton buttoncancel=new JButton("清空");
public Land(){
jf=this;
setTitle("登录");
Font f = new Font("新宋体",Font.PLAIN,12);
Container con = getContentPane();
con.setLayout(null);
label.setBounds(95,10,110,20);
label.setFont(new Font("新宋体",Font.PLAIN,14));
con.add(label);
labelName.setBounds(45,40,55,20);
labelName.setFont(f);
con.add(labelName);
textName.setBounds(95,40,120,20);
con.add(textName);
labelage.setBounds(45,70,45,20);
con.add(labelage);
labelage.setFont(f);
textage.setBounds(95,70,120,20);
con.add(textage);
buttonEnter.setBounds(90,110,60,20);
buttonEnter.setFont(f);
con.add(buttonEnter);
//
登陆的鼠标监听
buttonEnter.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent me){
if(textName.getText().equals("")){
new JOptionPane().showMessageDialog(null,"用户名不能为空!");
}
else if(textage.getText().equals("")){
new JOptionPane().showMessageDialog(null,"密码不能为空!");
}
else{
String sql="select * from UserInformation where User_Name = '" + textName.getText() + "' and Password = '" + textage.getText()+ "'";
System.out.println(sql);
Judge(
sql);
}
}
});
buttoncancel.setBounds(155,110,60,20);
buttoncancel.setFont(f);
con.add(buttoncancel);
//清空按钮的鼠标监听方法
buttoncancel.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent me){
textName.setText("");
textage.setText("");
}
});
setResizable(false);
Image img=Toolkit.getDefaultToolkit().getImage("image\\main.gif");
setIconImage(img);
Toolkit t = Toolkit.getDefaultToolkit();
int w = t.getScreenSize().width;
int h = t.getScreenSize().height;
setBounds(w/2-150,h/2-90,300,180);
setVisible(true);
}
private void Judge(String sqlString) {
if (Database.joinDB()) {
if (Database.query(sqlString))
try{
if(Database.rs.isBeforeFirst()) {
System.out.println("密码正确");
jf.setVisible(false);
Database.close();
new Main();
}
else {
System.out.println("错误");
new JOptionPane().showMessageDialog(null,"用户
名或密码错误!","",JOptionPane.ERROR_MESSAGE);
}
}catch(Exception ex) {
System.out.println(ex.getMessage());
}
}
else{
System.out.println("连接数据库不成功!!!");
}
}
public static void main(String args[]){
new Land();
}
}
//主函数类,可以独立运行
package classsource;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
public class Main extends JFrame implements Runnable{
Thread t=new Thread(this);
JDesktopPane deskpane = new JDesktopPane();
JPanel p = new JPanel();
Label lp1=new Label("欢 迎 使 用 员 工 管 理 系 统 !");
ImageIcon icon1=new ImageIcon("imagetjsc.gif");
ImageIcon icon2=new ImageIcon("imagecxdl.gif");
ImageI