chakanliuyan.java

教材管理系统

package bookmanager;

import javax.swing.*;
import com.borland.jbcl.layout.*;
import java.awt.*;
import java.sql.*; //引入包java.sql.*;
import javax.swing.table.*; //引入包sqljavax.swing.table.*;
import java.util.*; //引入包sqljava.util*;
import java.awt.event.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class chakanliuyan
    extends JFrame {
  //定义结果集
  ResultSet rs;
  //定义数据库操作对象
  private DBManager db = new DBManager();



  XYLayout xYLayout1 = new XYLayout();
  JLabel jLabel1 = new JLabel();
  JLabel jLabel2 = new JLabel();
  JTextField jTextFielddepartment = new JTextField();
  JLabel jLabel4 = new JLabel();
  JLabel jLabel5 = new JLabel();
  JTextField jTextFieldlydate = new JTextField();
  JTextArea jTextArealynr = new JTextArea();
  JLabel jLabel6 = new JLabel();
  JComboBox jComboBoxprofessional = new JComboBox();
  JButton jButtonok = new JButton();
  JButton jButtondelete = new JButton();

  public chakanliuyan() {
    try {
      jbInit();
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }

  public static void main(String[] args) {
 chakanliuyan chakanliuyan = new chakanliuyan();
  }

  private void jbInit() throws Exception {
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel1.setText("所在专业");
    xYLayout1.setWidth(588);
    xYLayout1.setHeight(497);
    this.getContentPane().setLayout(xYLayout1);
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel2.setText("所属院系");
    jTextFielddepartment.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextFielddepartment.setText("");
    jLabel4.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel4.setText("留言内容");
    jLabel5.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel5.setText("留言时间");
    jTextFieldlydate.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextFieldlydate.setText("");
    jTextArealynr.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextArealynr.setText("");
    jLabel6.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel6.setText("选择用户名点击查询留言按钮显示详细信息");
    jButtonok.setFont(new java.awt.Font("Dialog", 0, 16));
    jButtonok.setText("查询留言");
    jButtondelete.setFont(new java.awt.Font("Dialog", 0, 16));
    jButtondelete.setText("删除留言");
    this.getContentPane().add(jLabel5, new XYConstraints(313, 112, 73, 36));
    this.getContentPane().add(jLabel1,   new XYConstraints(52, 66, 80, 31));
    this.getContentPane().add(jLabel6,  new XYConstraints(55, 16, 434, 29));
    this.getContentPane().add(jComboBoxprofessional,   new XYConstraints(147, 67, 150, 29));
    this.getContentPane().add(jButtonok,    new XYConstraints(83, 441, 106, 38));
    this.getContentPane().add(jTextFieldlydate, new XYConstraints(394, 115, 143, 30));
    this.getContentPane().add(jButtondelete, new XYConstraints(188, 441, 104, 38));
    this.getContentPane().add(jLabel2, new XYConstraints(310, 67, 77, 27));
    this.getContentPane().add(jTextFielddepartment,  new XYConstraints(390, 66, 146, 30));
    this.getContentPane().add(jLabel4, new XYConstraints(49, 125, 82, 31));
    this.getContentPane().add(jTextArealynr,  new XYConstraints(56, 170, 485, 254));
     jButtonok.addMouseListener(new chakanliuyan_jButtonok_mouseAdapter(this));
     jButtondelete.addMouseListener(new chakanliuyan_jButtondelete_mouseAdapter(this));
  }


 void jButtonok_mouseClicked(MouseEvent e) {
    String strSQL;
    //校验书名是否为空
    if ( jComboBoxprofessional.getSelectedItem().toString().equals("")) {
      JOptionPane.showMessageDialog(null, "不许为空！");
      return;
    }
    //生成sql操作语句，查询要更新的书是否存在，若存在将此书相关信息绑顶到窗体上，若不存在提示并返回
    boolean isFirst = true;
    strSQL = "select ly.* from  ly";
      if (!jComboBoxprofessional.getSelectedItem().toString().equals("")) {
        strSQL = strSQL + " where ly.professional='" +
            jComboBoxprofessional.getSelectedItem().toString() +
            "'";
      isFirst = false;
      }

    rs = db.getResult(strSQL);
    boolean isexist = false;
    try {
      isexist = rs.first();
    }
    catch (SQLException ex1) {
    }
    //若此书不存在，提示警告信息
    if (!isexist) {
      JOptionPane.showMessageDialog(null, "不存在！");
    }
    else {
      try {
        //将游标移动到首位置
        rs.first();
        //在文本框中显示数据集中的数据
        jTextFielddepartment.setText(rs.getString("department"));

        jTextFieldlydate.setText(rs.getString("lydate"));
        jTextArealynr.setText(rs.getString("lynr"));

}
      catch (SQLException ex) {
      }
    }
  }

  void jButtondelete_mouseClicked(MouseEvent e) {
String strSQL;

strSQL = "delete from ly where ly.professional='" +
   jComboBoxprofessional.getSelectedItem().toString() + "'";
//由数据库操作对象执行数据库操作，并返回操作成功失败的提示信息
if (db.executeSql(strSQL)) {
  JOptionPane.showMessageDialog(null, "成功删除！");
}
else {
  JOptionPane.showMessageDialog(null, " 删除失败，请重新操作！");
}
}



class chakanliuyan_jButtonok_mouseAdapter
    extends java.awt.event.MouseAdapter {
 chakanliuyan adaptee;

chakanliuyan_jButtonok_mouseAdapter(chakanliuyan adaptee) {
    this.adaptee = adaptee;
  }

  public void mouseClicked(MouseEvent e) {
    adaptee.jButtonok_mouseClicked(e);
  }
}

class chakanliuyan_jButtondelete_mouseAdapter
    extends java.awt.event.MouseAdapter {
  chakanliuyan adaptee;

 chakanliuyan_jButtondelete_mouseAdapter(chakanliuyan adaptee) {
    this.adaptee = adaptee;
  }

  public void mouseClicked(MouseEvent e) {
    adaptee.jButtondelete_mouseClicked(e);
  }
}
    }