borrowinfoupdate.java

虚拟的图书管理系统

package bookmanager;

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

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

public class borrowInfoUpdate
    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();
  JButton jButtonupdate = new JButton();
  JButton jButtonexit = new JButton();
  JButton jButtondeciside = new JButton();
  JButton jButtonClear = new JButton();
  JLabel jLabel8 = new JLabel();
  JLabel jLabel4 = new JLabel();
  JTextField jTextbookname = new JTextField();
  JTextField jTextborrowdate = new JTextField();
  JLabel jLabel1 = new JLabel();
  JLabel jLabel3 = new JLabel();
  JLabel jLabel2 = new JLabel();
  JTextField jTextcomment = new JTextField();
  JTextField jTextstudentname = new JTextField();

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

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

  private void jbInit() throws Exception {
    jButtonClear.setFont(new java.awt.Font("Dialog", 0, 16));
    jButtonClear.setText("清空");
    jButtonClear.addMouseListener(new
                                  borrowInfoUpdate_jButtonClear_mouseAdapter(this));
    jButtondeciside.setFont(new java.awt.Font("Dialog", 0, 16));
    jButtondeciside.setText("确定");
    jButtondeciside.addMouseListener(new
        borrowInfoUpdate_jButtondeciside_mouseAdapter(this));
    jButtonexit.setFont(new java.awt.Font("Dialog", 0, 16));
    jButtonexit.setText("退出");
    jButtonexit.addMouseListener(new borrowInfoUpdate_jButtonexit_mouseAdapter(this));
    jButtonupdate.setFont(new java.awt.Font("Dialog", 0, 16));
    jButtonupdate.setText("更新");
    jButtonupdate.addMouseListener(new
                                   borrowInfoUpdate_jButtonupdate_mouseAdapter(this));
    this.getContentPane().setLayout(xYLayout1);
    jLabel8.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel8.setText("输入借阅者姓名或书名点击确定，将调出此书相关信息");
    jLabel4.setText("备注");
    jLabel4.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextbookname.setText("");
    jTextbookname.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextborrowdate.setText("");
    jTextborrowdate.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel1.setText("借阅者姓名");
    jLabel1.setRequestFocusEnabled(true);
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel3.setText("借阅日期");
    jLabel3.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel2.setText("书名");
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextcomment.setText("");
    jTextcomment.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextstudentname.setText("");
    jTextstudentname.setFont(new java.awt.Font("Dialog", 0, 16));
    xYLayout1.setWidth(477);
    xYLayout1.setHeight(386);
    this.setTitle("借阅信息修改");
    this.getContentPane().add(jTextstudentname,
                              new XYConstraints(219, 90, 150, 26));
    this.getContentPane().add(jLabel4, new XYConstraints(90, 247, 63, 29));
    this.getContentPane().add(jTextbookname,
                              new XYConstraints(218, 144, 154, 23));
    this.getContentPane().add(jTextborrowdate,
                              new XYConstraints(218, 187, 153, -1));
    this.getContentPane().add(jLabel1, new XYConstraints(91, 86, 88, 33));
    this.getContentPane().add(jLabel3, new XYConstraints(88, 200, 87, 29));
    this.getContentPane().add(jLabel2, new XYConstraints(88, 144, 89, 35));
    this.getContentPane().add(jTextcomment, new XYConstraints(219, 236, 154, -1));
    this.getContentPane().add(jLabel8, new XYConstraints(17, 26, 435, 25));
    this.getContentPane().add(jButtondeciside,
                              new XYConstraints(166, 314, -1, 28));
    this.getContentPane().add(jButtonupdate, new XYConstraints(232, 314, 74, 27));
    this.getContentPane().add(jButtonexit, new XYConstraints(306, 314, 75, 28));
    this.getContentPane().add(jButtonClear, new XYConstraints(99, 314, 66, 28));
  }

  void jButtondeciside_mouseClicked(MouseEvent e) {
    String sql;
    if (jTextstudentname.getText().trim().length() == 0 &&
        jTextbookname.getText().trim().length() == 0) {
      JOptionPane.showMessageDialog(null, "至少输入一个检索条件!");
      return;
    }
    //定义变量，用来判断是否是第一个查询条件
    boolean isfirst = true;
    sql = "select * from BookBorrow ";
    //如果学生姓名的查询条件不为空
    if (jTextstudentname.getText().trim().length() == 0) {}
    else {
      sql = sql + "  where  Studentname='" + jTextstudentname.getText().trim() +
          "'";
      isfirst = false;
    }
    //如果书名的查询条件不为空
    if (jTextbookname.getText().trim().length() == 0) {}
    else { //如果是第一个查询条件
      if (isfirst)
        sql = sql + " where Bookname='" + jTextbookname.getText().trim() + "'";
        //如果是第二个查询条件
      else
        sql = sql + " and Bookname='" + jTextbookname.getText().trim() + "'";
    }
    //执行数据库的查询操作
    rs = db.getResult(sql);
    try {
      //判断返回的结果集是否为空，若不为空显示第一条记录
      if (!rs.equals(null)) {
        rs.first();
        jTextstudentname.setText(rs.getString("Studentname"));
        jTextbookname.setText(rs.getString("Bookname"));
        jTextborrowdate.setText(rs.getString("Borrowdate"));
        jTextcomment.setText(rs.getString("Comment"));
      }
      else {
        JOptionPane.showMessageDialog(null, "无次纪录!");
      }
    } //若出现异常，弹出警告对话框
    catch (SQLException ex) {
      JOptionPane.showMessageDialog(null, "发生错误!");
    }
  }

  //清空文本框
  void jButtonClear_mouseClicked(MouseEvent e) {
    jTextstudentname.setText("");
    jTextbookname.setText("");
    jTextborrowdate.setText("");
    jTextcomment.setText("");
  }

  void jButtonexit_mouseClicked(MouseEvent e) {
    this.dispose();
  }

  void jButtonupdate_mouseClicked(MouseEvent e) {
    String strSQL;
    //生成更新sql语句
    strSQL = "update BookBorrow set  ";
    strSQL = strSQL + " Borrowdate='" + jTextborrowdate.getText().trim() + "',";
    strSQL = strSQL + " Comment='" + jTextcomment.getText().trim() + "'";
    strSQL = strSQL + " where Studentname='" + jTextstudentname.getText().trim() +
        "'";
    strSQL = strSQL + " and Bookname='" + jTextbookname.getText().trim() + "'";
    //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, "成功更新！");
    }
    else {
      JOptionPane.showMessageDialog(null, " 更新失败，请重新操作！");
    }
  }
}

class borrowInfoUpdate_jButtondeciside_mouseAdapter
    extends java.awt.event.MouseAdapter {
  borrowInfoUpdate adaptee;

  borrowInfoUpdate_jButtondeciside_mouseAdapter(borrowInfoUpdate adaptee) {
    this.adaptee = adaptee;
  }

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

class borrowInfoUpdate_jButtonClear_mouseAdapter
    extends java.awt.event.MouseAdapter {
  borrowInfoUpdate adaptee;

  borrowInfoUpdate_jButtonClear_mouseAdapter(borrowInfoUpdate adaptee) {
    this.adaptee = adaptee;
  }

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

class borrowInfoUpdate_jButtonexit_mouseAdapter
    extends java.awt.event.MouseAdapter {
  borrowInfoUpdate adaptee;

  borrowInfoUpdate_jButtonexit_mouseAdapter(borrowInfoUpdate adaptee) {
    this.adaptee = adaptee;
  }

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

class borrowInfoUpdate_jButtonupdate_mouseAdapter
    extends java.awt.event.MouseAdapter {
  borrowInfoUpdate adaptee;

  borrowInfoUpdate_jButtonupdate_mouseAdapter(borrowInfoUpdate adaptee) {
    this.adaptee = adaptee;
  }

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