useradd.java~3~

这是一个图书管理系统

package bookmanager;

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

public class userAdd extends JFrame {
//定义数据库操作对象
  private DBManager db =new DBManager();

  XYLayout xYLayout1 = new XYLayout();
  JButton jButtonCancel = new JButton();
  JLabel jLabel2 = new JLabel();
  JButton jButtonOK = new JButton();
  JPasswordField jPasswordold = new JPasswordField();
  JLabel jLabel1 = new JLabel();
  JTextField jTextFieldusername = new JTextField();

  public userAdd() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    userAdd userAdd = new userAdd();
  }
  private void jbInit() throws Exception {
    jTextFieldusername.setText("");
    jTextFieldusername.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel1.setText("用户名");
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 16));
    jPasswordold.setText("");
    jButtonOK.setText("添加");
    jButtonOK.addMouseListener(new userAdd_jButtonOK_mouseAdapter(this));
    jButtonOK.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel2.setText("密码");
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 16));
     jButtonCancel.setText("取消");
    jButtonCancel.addMouseListener(new userAdd_jButtonCancel_mouseAdapter(this));
    jButtonCancel.setFont(new java.awt.Font("Dialog", 0, 16));
    this.getContentPane().setLayout(xYLayout1);
    xYLayout1.setWidth(378);
    xYLayout1.setHeight(262);
    this.setTitle("添加用户");
    this.getContentPane().add(jTextFieldusername,  new XYConstraints(207, 28, 111, 38));
    this.getContentPane().add(jLabel2, new XYConstraints(57, 95, 80, 34));
    this.getContentPane().add(jPasswordold, new XYConstraints(208, 91, 111, 35));
    this.getContentPane().add(jLabel1, new XYConstraints(56, 29, 99, 34));
    this.getContentPane().add(jButtonCancel, new XYConstraints(206, 177, 94, 30));
    this.getContentPane().add(jButtonOK, new XYConstraints(88, 176, 91, 31));
  }

  void jButtonCancel_mouseClicked(MouseEvent e) {
        this.dispose();
  }
//首先校验输入是否为空，然后检验用户名是否已存在，然后执行插入操作
  void jButtonOK_mouseClicked(MouseEvent e) {
            String strSQL ;
       //校验用户名是否为空
		 if(jTextFieldusername.GetText().Trim().eques(""))
	       {JOptionPane.showMessageDialog(null,"用户名不许为空！");
	        return;}
      //校验密码是否为空
		 if(jPasswordold.GetText().Trim().eques(""))
	       {JOptionPane.showMessageDialog(null,"密码不许为空！");
	        return;}

			 //生成sql操作语句，查询要添加的用户名是否已经存在，若存在执行删除，若不存在提示并返回
         strSQL="select * from user where username='"+jTextFieldusername.getText().trim() +"'";
                rs=db.getResult(strSQL) ;
         if(rs.First())
           {JOptionPane.showMessageDialog(null,"用户名已存在！");
		                     }
         else
           {
			  //然后执行插入操作
            strSQL="insert into  user(username,password) values('"+jTextFieldusername.getText().trim() +"','"+jPasswordold.getText().trim()+"')";
               //由数据库操作对象执行数据库操作，并返回操作成功失败的提示信息
				if(db.executeSql(strSQL))
                   {JOptionPane.showMessageDialog(null,"成功添加！"); }
                else
                   { JOptionPane.showMessageDialog(null," 添加失败，请重新操作！");      }
             }

   
  }
}

class userAdd_jButtonCancel_mouseAdapter extends java.awt.event.MouseAdapter {
  userAdd adaptee;

  userAdd_jButtonCancel_mouseAdapter(userAdd adaptee) {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e) {
    adaptee.jButtonCancel_mouseClicked(e);
  }
}

class userAdd_jButtonOK_mouseAdapter extends java.awt.event.MouseAdapter {
  userAdd adaptee;

  userAdd_jButtonOK_mouseAdapter(userAdd adaptee) {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e) {
    adaptee.jButtonOK_mouseClicked(e);
  }
}