class_info_show.java~5~

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 BJXX;
import com.zdsoft.gui.*; //引入本包中的类，因为我们要用到的ASTable类(表格)、ASPanel类(面板)、ASTableView类(图视)  都位于本包中
import com.zdsoft.datacenter.ASDatacenter; //引入本包中的类，因为我们要用到的ASDatacenter类(数据中心，
//用来连接相应数据库及执行各种数据库操作)位于本包中
import com.zdsoft.datastore.ASDatastore; //引入本包中的类，因为我们要用到的ASDatastore类(数据仓库)位于本包中
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class Class_Info_Show
    extends ASPanel {
  JPanel jPanel1 = new JPanel();
  JPanel jPanel2 = new JPanel();
  JPanel jPanel3 = new JPanel();
  JLabel jLabel1 = new JLabel();
  JToggleButton jToggleButton1 = new JToggleButton();
  JToggleButton jToggleButton2 = new JToggleButton();
  JScrollPane jScrollPane1 = new JScrollPane();

  ASTable jTable1; //= new JTable();
  ASDatastore ds;

  JToggleButton jToggleButton3 = new JToggleButton();
  public Class_Info_Show() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  private void jbInit() throws Exception {


    //ASTable中显示相应表数据的步骤：

    //(1)创建数据中心对象
    ASDatacenter dc = new ASDatacenter();

    //(2)连接数据库
    dc.connect();

    //(3)构造查询语句
    String sql = "select * from bj_info";

    //(4)调用数据中心对象dc中的retrieve方法，执行查询，得到一个数据结果集(ASDatastore类的一个具体对象)。本数据结果集
    //中保存了根据查询条件得到的所有数据.
    ds = dc.retrieve(sql);

    //(5)构造表格的显示标题.
    String[] liab = new String[3];
    liab[0] = "班级编号";
    liab[1] = "班级名称";
    liab[2] = "班主任";


    //(6)将表格标题设置到结果集。注意：设置表格标题时，字符串数组的长度与相应数据结果集的
    //列数应一样。否则程序运行时会报错.
    ds.setTitleLable(liab);

    //(7)用结果集构造视图
    ASTableView tv = new ASTableView(ds);

    //(8)用创建好的视图对象构造表格
    jTable1 = new ASTable(tv);

    //(9)关闭数据库连接
    dc.disconnect();

    jLabel1.setFont(new java.awt.Font("Serif", 0, 15));
    jLabel1.setText("班级信息维护");
    jToggleButton1.setText("删除");
    jToggleButton1.addActionListener(new Class_Info_Show_jToggleButton1_actionAdapter(this));
    jToggleButton2.setText("增加");
    jToggleButton2.addActionListener(new Class_Info_Show_jToggleButton2_actionAdapter(this));
    jToggleButton3.setText("修改");
    jToggleButton3.addActionListener(new Class_Info_Show_jToggleButton3_actionAdapter(this));
    jScrollPane1.setPreferredSize(new Dimension(500, 350));
    this.setMinimumSize(new Dimension(185, 105));
    this.setPreferredSize(new Dimension(600, 600));
    this.add(jPanel1, BorderLayout.CENTER);
    jPanel1.add(jScrollPane1, null);
    jScrollPane1.getViewport().add(jTable1, null);
    this.add(jPanel2, BorderLayout.SOUTH);
    jPanel2.add(jToggleButton2, null);
    jPanel2.add(jToggleButton1, null);
    jPanel2.add(jToggleButton3, null);
    this.add(jPanel3,  BorderLayout.NORTH);
    jPanel3.add(jLabel1, null);
  }

  void jToggleButton1_actionPerformed(ActionEvent e) {
    int i = jTable1.getSelectedRow();
     if(i==-1){
       JOptionPane.showMessageDialog(this, "请选择要删除的数据!", "提示信息",
                                     JOptionPane.ERROR_MESSAGE);
     }
     else{
       try {
         int id = ds.getItemInteger(i,"id").intValue();
         String sql = "delete bj_info where id="+id;
         ASDatacenter dc = new ASDatacenter();
         dc.connect();
         String[] msg = dc.update(sql);
         if(msg[0].equals("true")){
           ds.removeRow(i);
         jTable1.ASTableRepant();
         }
         else{}
         dc.disconnect();
       }
       catch (Exception ex) {

       }
     }
   }

  void jToggleButton2_actionPerformed(ActionEvent e) {

  }

  }





class Class_Info_Show_jToggleButton1_actionAdapter implements java.awt.event.ActionListener {
  Class_Info_Show adaptee;

  Class_Info_Show_jToggleButton1_actionAdapter(Class_Info_Show adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jToggleButton1_actionPerformed(e);
  }
}

class Class_Info_Show_jToggleButton3_actionAdapter implements java.awt.event.ActionListener {
  Class_Info_Show adaptee;

  Class_Info_Show_jToggleButton3_actionAdapter(Class_Info_Show adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
//    adaptee.jToggleButton3_actionPerformed(e);
  }
}

class Class_Info_Show_jToggleButton2_actionAdapter implements java.awt.event.ActionListener {
  Class_Info_Show adaptee;

  Class_Info_Show_jToggleButton2_actionAdapter(Class_Info_Show adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jToggleButton2_actionPerformed(e);
  }
}