mainframe.java~8~

基于数据库组件的系统开发的实例

package tongxinbu;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.dx.sql.dataset.*;
import com.borland.dx.dataset.*;

public class MainFrame extends JFrame {
  JPanel contentPane;
  JRadioButton jRadioButton1 = new JRadioButton();
  JRadioButton jRadioButton2 = new JRadioButton();
  JRadioButton jRadioButton3 = new JRadioButton();
  JLabel jLabel1 = new JLabel();
  JLabel jLabel2 = new JLabel();
  JTextField jTextField1 = new JTextField();
  JPasswordField jPasswordField1 = new JPasswordField();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  ButtonGroup buttonGroup1 = new ButtonGroup();
  Database database1 = new Database();
  QueryDataSet queryDataSet1 = new QueryDataSet();

  //Construct the frame
  public MainFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    jRadioButton1.setFont(new java.awt.Font("Dialog", 0, 16));
    jRadioButton1.setDebugGraphicsOptions(0);
    jRadioButton1.setText("登录");
    jRadioButton1.setBounds(new Rectangle(40, 41, 66, 25));
    contentPane.setLayout(null);
    this.setSize(new Dimension(400, 300));
    this.setTitle("多用户通讯簿系统");
    jRadioButton2.setBounds(new Rectangle(139, 41, 90, 25));
    jRadioButton2.setText("修改密码");
    jRadioButton2.setFont(new java.awt.Font("Dialog", 0, 16));
    jRadioButton3.setBounds(new Rectangle(261, 41, 66, 25));
    jRadioButton3.setText("注册");
    jRadioButton3.setFont(new java.awt.Font("Dialog", 0, 16));
    jRadioButton3.setSelected(true);
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel1.setText("用户名");
    jLabel1.setBounds(new Rectangle(40, 93, 51, 29));
    jLabel2.setBounds(new Rectangle(40, 148, 51, 29));
    jLabel2.setText("密    码");
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextField1.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextField1.setText("");
    jTextField1.setBounds(new Rectangle(137, 91, 165, 34));
    jPasswordField1.setFont(new java.awt.Font("Dialog", 0, 16));
    jPasswordField1.setText("");
    jPasswordField1.setBounds(new Rectangle(137, 142, 165, 34));
    jButton1.setBounds(new Rectangle(77, 212, 86, 35));
    jButton1.setFont(new java.awt.Font("Dialog", 0, 16));
    jButton1.setFocusPainted(true);
    jButton1.setText("确定");
    jButton1.addActionListener(new MainFrame_jButton1_actionAdapter(this));
    jButton2.setText("退出");
    jButton2.setFocusPainted(true);
    jButton2.setFont(new java.awt.Font("Dialog", 0, 16));
    jButton2.setBounds(new Rectangle(190, 210, 86, 35));
    database1.setConnection(new com.borland.dx.sql.dataset.ConnectionDescriptor("jdbc:microsoft:sqlserver://127.0.0.1:1433;DataBaseName=addresslist", "sa", "", false, "com.microsoft.jdbc.sqlserver.SQLServerDriver"));
    database1.setTransactionIsolation(java.sql.Connection.TRANSACTION_READ_COMMITTED);
    database1.setDatabaseName("");
    queryDataSet1.setMetaDataUpdate(MetaDataUpdate.ALL);
//    queryDataSet1.setQuery(new com.borland.dx.sql.dataset.QueryDescriptor(database1, "select * from address_users where username=\'a\'", null, true, Load.ALL));
    contentPane.add(jRadioButton1, null);
    contentPane.add(jRadioButton2, null);
    contentPane.add(jRadioButton3, null);
    contentPane.add(jLabel1, null);
    contentPane.add(jLabel2, null);
    contentPane.add(jTextField1, null);
    contentPane.add(jPasswordField1, null);
    contentPane.add(jButton2, null);
    contentPane.add(jButton1, null);
    buttonGroup1.add(jRadioButton1);
    buttonGroup1.add(jRadioButton2);
    buttonGroup1.add(jRadioButton3);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  void jButton1_actionPerformed(ActionEvent e) {
    String user=jTextField1.getText().trim();
    String pass=jPasswordField1.getText().trim();
    queryDataSet1.close();//先关闭
    queryDataSet1.setQuery(new com.borland.dx.sql.dataset.QueryDescriptor(database1, "select * from address_users where username=\'"
        +user+"\'", null, true, Load.ALL));
    queryDataSet1.executeQuery();//再执行
    if(jRadioButton1.isSelected()){
       if (queryDataSet1.rowCount() > 0) {
         SucFrame s=new SucFrame();
         s.setSize(200,100);
         s.show();
       }
    }
    if(jRadioButton2.isSelected()){

    }
    if(jRadioButton3.isSelected()){
      if (queryDataSet1.rowCount() > 0) {
        JOptionPane.showMessageDialog(this, "该用户已经存在,请重新输入");
        jTextField1.setText("");
        jPasswordField1.setText("");
        return;
      }
      else {
        queryDataSet1.last();
        queryDataSet1.insertRow(true);
        queryDataSet1.setString("userName", user);
        queryDataSet1.setString("Password", pass);
        database1.saveChanges(queryDataSet1);
        JOptionPane.showMessageDialog(this, "成功注册");
      }
    }

  }
}

class MainFrame_jButton1_actionAdapter implements java.awt.event.ActionListener {
  MainFrame adaptee;

  MainFrame_jButton1_actionAdapter(MainFrame adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}