useradd.java

虚拟的图书管理系统

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();
  }

//执行插入操作。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 + jPasswordconfirm.getText().trim() + "','";
      strSQL = strSQL + jComboBoxpower.getSelectedItem().toString().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);
  }
}