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 {  //定義結果集  ResultSet rs;//定義數據庫操作對象  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("用戶名");    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("密碼");    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("添加用戶");    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();  }//首先校驗輸入是否為空，然后檢驗用戶名是否已存在，然后執行插入操作  void jButtonOK_mouseClicked(MouseEvent e) {            String strSQL ;       //校驗用戶名是否為空		 if(jTextFieldusername.getText().trim().equals(""))	       {JOptionPane.showMessageDialog(null,"用戶名不許為空！");	        return;}      //校驗密碼是否為空		 if(jPasswordold.getText().trim().equals(""))	       {JOptionPane.showMessageDialog(null,"密碼不許為空！");	        return;}			 //生成sql操作語句，查詢要添加的用戶名是否已經存在，若存在執行刪除，若不存在提示并返回         strSQL="select * from user where username='"+jTextFieldusername.getText().trim() +"'";                rs=db.getResult(strSQL) ;         if(rs != null)           {JOptionPane.showMessageDialog(null,"用戶名已存在！");		                     }         else           {			  //然后執行插入操作            strSQL="insert into  user(username,password) values('"+jTextFieldusername.getText().trim() +"','"+jPasswordold.getText().trim()+"')";               //由數據庫操作對象執行數據庫操作，并返回操作成功失敗的提示信息				if(db.executeSql(strSQL))                   {JOptionPane.showMessageDialog(null,"成功添加！"); }                else                   { JOptionPane.showMessageDialog(null," 添加失敗，請重新操作！");      }             }  }}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);  }}