ljb_add.java~6~

这是一个图书和学生信息的管理系统,它可以在数据库里面增加,修改,删除数据来管理图书和学生信息

package LJB;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */
import com.zdsoft.gui.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import com.zdsoft.datacenter.ASDatacenter;

public class LJB_add extends ASDialog{
  BorderLayout borderLayout1 = new BorderLayout();
  JPanel jPanel1 = new JPanel();
  LJB_show t1;
  JPanel jPanel2 = new JPanel();
  JPanel jPanel3 = new JPanel();
  JLabel jLabel1 = new JLabel();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  GridBagLayout gridBagLayout1 = new GridBagLayout();
  JLabel jLabel2 = new JLabel();
  JTextField class_id = new JTextField();
  JLabel jLabel3 = new JLabel();
  JTextField class_name = new JTextField();
  JLabel jLabel4 = new JLabel();
  JTextField class_teacher = new JTextField();
  public LJB_add(LJB_show s) {
    t1 = s;
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  private void jbInit() throws Exception {
    this.setSize(new Dimension(262, 167));//(1)定义本对话框的大小(宽度,高度);
    this.getContentPane().setLayout(borderLayout1);
    jLabel1.setFont(new java.awt.Font("Serif", 0, 15));
    jLabel1.setForeground(Color.magenta);
    jLabel1.setText("增加信息");
    jButton1.setFont(new java.awt.Font("Serif", 0, 12));
    jButton1.setText("取消");
    jButton1.addActionListener(new LJB_add_jButton1_actionAdapter(this));
    jButton2.setFont(new java.awt.Font("Serif", 0, 12));
    jButton2.setText("确定");
    jButton2.addActionListener(new LJB_add_jButton2_actionAdapter(this));
    jPanel1.setLayout(gridBagLayout1);
    jLabel2.setFont(new java.awt.Font("Serif", 0, 12));
    jLabel2.setMaximumSize(new Dimension(50, 18));
    jLabel2.setMinimumSize(new Dimension(50, 18));
    jLabel2.setPreferredSize(new Dimension(50, 18));
    jLabel2.setHorizontalAlignment(SwingConstants.CENTER);
    jLabel2.setText("班级号码");
    class_id.setMinimumSize(new Dimension(100, 25));
    class_id.setPreferredSize(new Dimension(100, 25));
    jLabel3.setFont(new java.awt.Font("Serif", 0, 12));
    jLabel3.setMaximumSize(new Dimension(50, 18));
    jLabel3.setMinimumSize(new Dimension(50, 18));
    jLabel3.setPreferredSize(new Dimension(50, 18));
    jLabel3.setHorizontalAlignment(SwingConstants.CENTER);
    jLabel3.setText("班级名称");
    class_name.setMinimumSize(new Dimension(100, 25));
    class_name.setPreferredSize(new Dimension(100, 25));
    class_name.setText("");
    class_name.addActionListener(new LJB_add_class_name_actionAdapter(this));
    jLabel4.setFont(new java.awt.Font("Serif", 0, 12));
    jLabel4.setMaximumSize(new Dimension(50, 18));
    jLabel4.setMinimumSize(new Dimension(50, 18));
    jLabel4.setPreferredSize(new Dimension(50, 18));
    jLabel4.setHorizontalAlignment(SwingConstants.CENTER);
    jLabel4.setText("班主任");
    class_teacher.setMinimumSize(new Dimension(100, 25));
    class_teacher.setPreferredSize(new Dimension(100, 25));
    class_teacher.setText("");
    this.getContentPane().add(jPanel1, BorderLayout.CENTER);
    jPanel1.add(jLabel2,   new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0
            ,GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
    jPanel1.add(class_id,    new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0
            ,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
    jPanel1.add(jLabel3,  new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0
            ,GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
    jPanel1.add(class_name,   new GridBagConstraints(1, 1, 1, 1, 0.0, 0.0
            ,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
    jPanel1.add(jLabel4, new GridBagConstraints(0, 2, 1, 1, 0.0, 0.0
            ,GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
    jPanel1.add(class_teacher,  new GridBagConstraints(1, 2, 1, 1, 0.0, 0.0
            ,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
    this.getContentPane().add(jPanel2, BorderLayout.SOUTH);
    jPanel2.add(jButton2, null);
    jPanel2.add(jButton1, null);
    this.getContentPane().add(jPanel3, BorderLayout.NORTH);
    jPanel3.add(jLabel1, null);
    this.setWindowCenter();
  }

  void class_name_actionPerformed(ActionEvent e) {

  }

  void jButton2_actionPerformed(ActionEvent e) {
    //当点击“保存”按扭后：
   //(1)创建数据中心对象
   ASDatacenter dc = new ASDatacenter();
   //(2)连接数据库
   dc.connect();
   //(3)构造插入数据库数据的SQL语句
   String sql = "insert into bj_dm(bj_id,bj_name,bj_teacher) values("+class_id.getText()+",'"+
   class_name.getText()+"','"+class_teacher.getText()+"')";
   System.out.println(sql);
   //(4)调用数据中心对象dc中的update方法，执行插入数据库数据操作，
   String[] msg = dc.update(sql);
   //本方法的返回值为一个两个元素的字符串数组。用来表示本次插入数据库数据操作是否成功；
   //其中，当msg[0]的值为“true”时，表示本次插入数据库数据操作成功，此时，msg[1]的值为“”；
   //当msg[0]的值为“false”时，表示本次插入数据库数据操作失败，此时，msg[1]的值为操作失败的原因说明;

   if(msg[0].equals("true")){//当msg[0]的值为“true”时，表示本次插入数据库数据操作成功
     //本次插入数据库数据操作成功后，还需要做两件事：
     //（1）：将父窗体中的数据仓库对象（即用来显示数据用的ASDatastore 类的对象ds）增加一行并填入相应的数据
     int row = t1.ds.addRow();//父窗体中的数据仓库对象ds增加一行，并返回所增加行的行数
     //从本对话框中取得增加的数据，填入父窗体中的数据仓库对象ds的相应行列中
     //因为ASDatastore类的setObjectAt可能会抛出异常，所以要将包含setObjectAt方法的语句写到try{}catch(){}语句块中
     try {
       t1.ds.setObjectAt(row,"bj_id",new Integer(class_id.getText()));//调用ASDatastore类的setObjectAt方法，将增加的相应值的“对象”
       t1.ds.setObjectAt(row,"bj_name",class_name.getText());
       t1.ds.setObjectAt(row,"bj_teacher",class_teacher.getText());
       //填入ds的相应行和列



       //通知显示ds数据的表格，ds的数据已发生改变
       t1.jTable1.ASTableRepant();

     }
     catch (Exception ex) {
       ex.printStackTrace();
     }
     //(2)关闭本本对话框
     this.dispose();
   }
   else{//数据库增加失败
     //弹出错误信息提示框
     dc.disconnect();
     JOptionPane.showMessageDialog(this,"数据库增加失败!","错误",JOptionPane.ERROR_MESSAGE);
     this.dispose();
   }

  //关闭数据库连接
   dc.disconnect();
  }

  void jButton1_actionPerformed(ActionEvent e) {
    this.dispose();

  }

}

class LJB_add_class_name_actionAdapter implements java.awt.event.ActionListener {
  LJB_add adaptee;

  LJB_add_class_name_actionAdapter(LJB_add adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.class_name_actionPerformed(e);
  }
}

class LJB_add_jButton2_actionAdapter implements java.awt.event.ActionListener {
  LJB_add adaptee;

  LJB_add_jButton2_actionAdapter(LJB_add adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton2_actionPerformed(e);
  }
}

class LJB_add_jButton1_actionAdapter implements java.awt.event.ActionListener {
  LJB_add adaptee;

  LJB_add_jButton1_actionAdapter(LJB_add adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}