useradd.java~10~

比较完整功能全面的图书管理系统；

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 {
  //定义结果集
  ResultSet rs;
//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 jPasswordconfirm = new JPasswordField();
  JLabel jLabel1 = new JLabel();
  JTextField jTextFieldusername = new JTextField();
  JLabel jLabel4 = new JLabel();
  JPasswordField jPassword = new JPasswordField();
  JComboBox jComboBoxpower = new JComboBox();
  JLabel jLabel3 = new JLabel();

  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));
    jPasswordconfirm.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(447);
    xYLayout1.setHeight(332);
    this.setTitle("添加用户");
    jLabel4.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel4.setText("登陆权限");
    jPassword.setFont(new java.awt.Font("Dialog", 0, 16));
    jPassword.setText("");
    jComboBoxpower.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel3.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel3.setText("确认密码");
    //添加权限下拉框中的可选项

    jComboBoxpower.addItem("书籍操作员");
    jComboBoxpower.addItem("借阅操作员");
    jComboBoxpower.addItem("管理员");

    this.getContentPane().add(jButtonOK, new XYConstraints(105, 262, 91, 31));
    this.getContentPane().add(jLabel1,  new XYConstraints(88, 30, 86, 34));
    this.getContentPane().add(jLabel3,  new XYConstraints(85, 141, 91, 36));
    this.getContentPane().add(jLabel2, new XYConstraints(88, 87, 80, 34));
    this.getContentPane().add(jTextFieldusername, new XYConstraints(230, 29, 120, 31));
    this.getContentPane().add(jPassword,  new XYConstraints(230, 84, 121, 32));
    this.getContentPane().add(jPasswordconfirm,  new XYConstraints(231, 141, 120, 32));
    this.getContentPane().add(jComboBoxpower,  new XYConstraints(230, 196, 121, 27));
    this.getContentPane().add(jLabel4, new XYConstraints(86, 194, 93, 34));
    this.getContentPane().add(jButtonCancel, new XYConstraints(229, 263, 94, 30));

  }

  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().equals(""))
	       {JOptionPane.showMessageDialog(null,"用户名不许为空！");
	        return;}
      //校验密码是否为空
		 if(jPassword.getText().trim().equals(""))
	       {JOptionPane.showMessageDialog(null,"密码不许为空！");
	        return;}
      //校验两次输入的密码是否一致
             if(!jPassword.getText().trim().equals(jPasswordconfirm.getText().trim()))
                   {JOptionPane.showMessageDialog(null,"两次输入的密码不一致！");
                  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) ;
       boolean  isexist=false;
                            try {
                                     isexist = rs.first();
                                     }
                            catch (SQLException ex1) {
                                     }
           //若用户名存在，提示警告信息
                if( isexist)

           {JOptionPane.showMessageDialog(null,"用户名已存在！");
		                     }
         else
           {
			  //然后执行插入操作
            strSQL="insert into  user(username,password,power) values('";
            strSQL=   strSQL+jTextFieldusername.getText().trim() +"','";
            strSQL=   strSQL+jComboBoxpower.getSelectedItem().toString().trim()  +"','";
            strSQL=   strSQL +jPasswordconfirm.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);
  }
}