loginframe.java~1~

基于数据库组件的系统开发的实例

package parkingsystem;

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

public class LoginFrame extends JFrame {
  JPanel contentPane;
  XYLayout xYLayout1 = new XYLayout();
  JLabel jLabel4 = new JLabel();
  JButton jButton2 = new JButton();
  JLabel jLabel2 = new JLabel();
  JButton jButton1 = new JButton();
  JPasswordField jPasswordField1 = new JPasswordField();
  JRadioButton jRadioButton1 = new JRadioButton();
  JLabel jLabel1 = new JLabel();
  JTextField jTextField1 = new JTextField();
  JRadioButton jRadioButton2 = new JRadioButton();
  ButtonGroup buttonGroup1 = new ButtonGroup();
  Database database1 = new Database();
  ParameterRow loginparameter = new ParameterRow();
  Column column1 = new Column();
  Column column2 = new Column();
  QueryDataSet queryDataSet1 = new QueryDataSet();
  Column column3 = new Column();

  static int userID;
  String password;
  String userType;

  //Construct the frame
  public LoginFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    jRadioButton2.setFont(new java.awt.Font("Dialog", 0, 14));
    jRadioButton2.setText("管理员");
    jTextField1.setText("");
    jTextField1.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel1.setText("用户ID号：");
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 14));
    jRadioButton1.setText("用户");
    jRadioButton1.setSelected(true);
    jRadioButton1.setFont(new java.awt.Font("Dialog", 0, 14));
    jButton1.setText("确定");
    jButton1.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel2.setText("密      码：");
    jButton2.setText("清空");
    jButton2.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel4.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel4.setText("用户类型：");
    contentPane.setLayout(xYLayout1);
    this.setFont(new java.awt.Font("Dialog", 0, 14));
    this.setSize(new Dimension(400, 300));
    this.setTitle("停车场系统登录界面");
    jLabel1.setFont(new java.awt.Font("Serif", 0, 14));
    jLabel1.setText("用户ID号：");
    jLabel2.setFont(new java.awt.Font("Serif", 0, 14));
    jLabel2.setText("密       码：");
    jLabel4.setFont(new java.awt.Font("Serif", 0, 14));
    jLabel4.setText("用户类型：");
    jRadioButton1.setFont(new java.awt.Font("Serif", 0, 14));
    jRadioButton1.setSelected(true);
    jRadioButton1.setText("普通用户");
    jRadioButton2.setFont(new java.awt.Font("Serif", 0, 14));
    jRadioButton2.setText("管理员");
    jButton1.setFont(new java.awt.Font("Serif", 0, 14));
    jButton1.setText("登   录");
    jButton1.addActionListener(new LoginFrame_jButton1_actionAdapter(this));
    jButton2.setFont(new java.awt.Font("Serif", 0, 14));
    jButton2.setText("重   置");
    jTextField1.setFont(new java.awt.Font("Serif", 0, 14));
    jPasswordField1.setFont(new java.awt.Font("Serif", 0, 14));
    database1.setConnection(new com.borland.dx.sql.dataset.ConnectionDescriptor("jdbc:microsoft:sqlserver://localhost:1433;DataBaseName=carparkingdb", "sa", "", false, "com.microsoft.jdbc.sqlserver.SQLServerDriver"));
    column1.setColumnName("UserID");
    column1.setDataType(com.borland.dx.dataset.Variant.INT);
    column1.setDefault("0");
    column1.setServerColumnName("NewColumn1");
    column1.setSqlType(0);
    column2.setColumnName("Password");
    column2.setDataType(com.borland.dx.dataset.Variant.STRING);
    column2.setDefault("0000");
    column2.setServerColumnName("NewColumn2");
    column2.setSqlType(0);
    column3.setCaption("NewColumn1");
    column3.setColumnName("UserType");
    column3.setDataType(com.borland.dx.dataset.Variant.STRING);
    column3.setDefault("普通用户");
    column3.setServerColumnName("NewColumn1");
    column3.setSqlType(0);
    loginparameter.setColumns(new Column[] {column1, column2, column3});
    queryDataSet1.setQuery(new com.borland.dx.sql.dataset.QueryDescriptor(database1, "select * from users where UserID=:UserID and Password=:Password and " +
      "UserType=:UserType", loginparameter, true, Load.ALL));
    contentPane.setFont(new java.awt.Font("Serif", 0, 14));
    contentPane.add(jLabel2,    new XYConstraints(65, 97, 87, 29));
    contentPane.add(jLabel1, new XYConstraints(65, 31, 87, 29));
    contentPane.add(jTextField1,  new XYConstraints(169, 30, 146, 32));
    contentPane.add(jLabel4,  new XYConstraints(65, 162, 87, 29));
    contentPane.add(jPasswordField1,    new XYConstraints(169, 98, 146, 32));
    contentPane.add(jRadioButton1,  new XYConstraints(165, 156, 82, 40));
    contentPane.add(jRadioButton2,  new XYConstraints(253, 156, 82, 40));
    contentPane.add(jButton2, new XYConstraints(226, 211, 100, 32));
    contentPane.add(jButton1, new XYConstraints(89, 211, 88, 30));
    buttonGroup1.add(jRadioButton1);
    buttonGroup1.add(jRadioButton2);
  }
  //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) {
    userID=Integer.parseInt(jTextField1.getText().trim());
    password=jPasswordField1.getText().trim();
    if(jRadioButton1.isSelected()){
      userType="普通用户";
    }
    else if(jRadioButton2.isSelected()){
      userType="管理员";
    }
    loginparameter.setInt("UserID",userID);
    loginparameter.setString("Password",password);
    loginparameter.setString("UserType",userType);
    queryDataSet1.refresh();
    if(queryDataSet1.rowCount()!=0){
      if(userType.equals("普通用户")){
        InOutFrame inAndOut = new InOutFrame();
        inAndOut.setSize(400,300);
        inAndOut.show();

      }
    }
    else{
      jTextField1.setText("不存在此用户，请重新登录");
    }

  }
}

class LoginFrame_jButton1_actionAdapter implements java.awt.event.ActionListener {
  LoginFrame adaptee;

  LoginFrame_jButton1_actionAdapter(LoginFrame adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}