userlogin.java~2~

本源码主要完成学生管理系统

package studentms;

import java.awt.*;
import javax.swing.*;
import java.sql.*;
import com.borland.jbcl.layout.*;
import java.awt.event.*;
/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class userLogin extends JDialog {
  ResultSet rs;    //定义结果集
  private Database db =new Database();//定义数据库操作对象
  menuClass myMain;  //定义主窗口类，用于操作父窗体

  JPanel panel1 = new JPanel();
  BorderLayout borderLayout1 = new BorderLayout();
  XYLayout xYLayout1 = new XYLayout();
  JLabel jLabel2 = new JLabel();
  JButton jBCancel = new JButton();
  JLabel jLabel1 = new JLabel();
  JTextField jTUserName = new JTextField();
  JButton jBOK = new JButton();
  JPasswordField jTPassword = new JPasswordField();

  public userLogin(Frame frame, String title, boolean modal) {
    super(frame, title, modal);
    try {
      jbInit();
      pack();
    }
    catch(Exception ex) {
      ex.printStackTrace();
    }
  }

  public userLogin() {
    this(null, "", false);
  }
  public userLogin(menuClass  pmain) {
     this(null, "", false);
      myMain=pmain;
 }

  private void jbInit() throws Exception {
    panel1.setLayout(borderLayout1);
    this.getContentPane().setLayout(xYLayout1);
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel2.setText("密码：");
    jBCancel.setFont(new java.awt.Font("Dialog", 0, 14));
    jBCancel.setText("取  消");
    jBCancel.addMouseListener(new userLogin_jBCancel_mouseAdapter(this));
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel1.setText("用户名：");
    jTUserName.setFont(new java.awt.Font("Dialog", 0, 14));
    jTUserName.setText("");
    jBOK.setFont(new java.awt.Font("Dialog", 0, 14));
    jBOK.setText("确  定");
    jBOK.addMouseListener(new userLogin_jBOK_mouseAdapter(this));
     jTPassword.setFont(new java.awt.Font("Dialog", 0, 14));
    jTPassword.setText("");
    //jComboBoxpower.add(null,"管理员") ;
   // jComboBoxpower.add(null,"操作员") ;
    //jComboBoxpower.add("管理员",null) ;
   // jComboBoxpower.add("操作员",null) ;
    xYLayout1.setWidth(314);
    xYLayout1.setHeight(179);

    getContentPane().add(panel1,  new XYConstraints(0, 0, -1, -1));
    this.getContentPane().add(jTUserName,      new XYConstraints(136, 38, 111, 25));
    this.getContentPane().add(jLabel2, new XYConstraints(67, 80, 51, 22));
    this.getContentPane().add(jLabel1, new XYConstraints(64, 38, 68, 24));
    this.getContentPane().add(jTPassword,  new XYConstraints(137, 77, 111, 25));
    this.getContentPane().add(jBOK,  new XYConstraints(66, 125, 75, 26));
    this.getContentPane().add(jBCancel,  new XYConstraints(172, 125, 75, 26));
  }

  void jBCancel_mouseClicked(MouseEvent e) {
            this.dispose();
  }

  void jBOK_mouseClicked(MouseEvent e) {
    if(jTUserName.getText().trim() =="")
               { JOptionPane.showMessageDialog(null,"用户名不可为空！");
                    return;}
    if(jTPassword.getText().trim() =="")
               {JOptionPane.showMessageDialog(null,"密码不可为空！");
                   return;}
          String strSQL ;
          strSQL="select * from user where username='"+jTUserName.getText().trim() +"' and password='"+jTPassword.getText().trim()+"'";
                 rs=db.getResult(strSQL) ;
                 boolean  isexist=false;
                try {
                  isexist = rs.first();
                }
                catch (SQLException ex1) {
                }
         if(!isexist )
            {JOptionPane.showMessageDialog(null,"用户名不存在，或密码不正确！");
             //  myMain.setEnable(false,false);

            }
          else
            {
                try {
                 rs.first();
                   if (rs.getString("power").equals("管理员"))
                        { //myMain.setEnable(true,true);
                          this.dispose();
                        }
                  else
                        { //myMain.setEnable(true,false);
                          //this.dispose();
                        }
                 }
                catch (SQLException ex) {
                  }

        }

  }

}

class userLogin_jBCancel_mouseAdapter extends java.awt.event.MouseAdapter {
  userLogin adaptee;

  userLogin_jBCancel_mouseAdapter(userLogin adaptee) {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e) {
    adaptee.jBCancel_mouseClicked(e);
  }
}

class userLogin_jBOK_mouseAdapter extends java.awt.event.MouseAdapter {
  userLogin adaptee;

  userLogin_jBOK_mouseAdapter(userLogin adaptee) {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e) {
    adaptee.jBOK_mouseClicked(e);
  }
}