?? returninfoupdate.java~3~
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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 returnInfoUpdate extends JFrame { ResultSet rs; //定義結(jié)果集 private DBManager db =new DBManager();//定義數(shù)據(jù)庫操作對象 XYLayout xYLayout1 = new XYLayout(); JLabel jLabel8 = new JLabel(); JLabel jLabel4 = new JLabel(); JTextField jTextbookname = new JTextField(); JTextField jTextborrowdate = new JTextField(); JLabel jLabel1 = new JLabel(); JLabel jLabel3 = new JLabel(); JButton jButtonupdate = new JButton(); JLabel jLabel2 = new JLabel(); JButton jButtonexit = new JButton(); JTextField jTextcomment = new JTextField(); JButton jButtondicision = new JButton(); JButton jButtonClear = new JButton(); JTextField jTextstudentname = new JTextField(); JTextField jTextreturndate = new JTextField(); JLabel jLabel5 = new JLabel(); public returnInfoUpdate() { try { jbInit(); } catch(Exception e) { e.printStackTrace(); } } public static void main(String[] args) { returnInfoUpdate returnInfoUpdate = new returnInfoUpdate(); } private void jbInit() throws Exception { jTextstudentname.setFont(new java.awt.Font("Dialog", 0, 16)); jTextstudentname.setText(""); jButtonClear.setFont(new java.awt.Font("Dialog", 0, 16)); jButtonClear.setText("清空"); jButtonClear.addMouseListener(new returnInfoUpdate_jButtonClear_mouseAdapter(this)); jButtondicision.setFont(new java.awt.Font("Dialog", 0, 16)); jButtondicision.setText("確定"); jButtondicision.addMouseListener(new returnInfoUpdate_jButtondicision_mouseAdapter(this)); jTextcomment.setFont(new java.awt.Font("Dialog", 0, 16)); jTextcomment.setText(""); jButtonexit.setFont(new java.awt.Font("Dialog", 0, 16)); jButtonexit.setText("退出"); jButtonexit.addMouseListener(new returnInfoUpdate_jButtonexit_mouseAdapter(this)); jLabel2.setFont(new java.awt.Font("Dialog", 0, 16)); jLabel2.setText("書名"); jButtonupdate.setFont(new java.awt.Font("Dialog", 0, 16)); jButtonupdate.setText("更新"); jButtonupdate.addMouseListener(new returnInfoUpdate_jButtonupdate_mouseAdapter(this)); jLabel3.setFont(new java.awt.Font("Dialog", 0, 16)); jLabel3.setText("借閱日期"); jLabel1.setFont(new java.awt.Font("Dialog", 0, 16)); jLabel1.setRequestFocusEnabled(true); jLabel1.setText("借閱者姓名"); jTextborrowdate.setFont(new java.awt.Font("Dialog", 0, 16)); jTextborrowdate.setText(""); jTextbookname.setFont(new java.awt.Font("Dialog", 0, 16)); jTextbookname.setText(""); jLabel4.setFont(new java.awt.Font("Dialog", 0, 16)); jLabel4.setText("備注"); jLabel8.setText("輸入借閱者姓名或書名點(diǎn)擊確定，將調(diào)出此書相關(guān)信息"); jLabel8.setFont(new java.awt.Font("Dialog", 0, 16)); this.getContentPane().setLayout(xYLayout1); jTextreturndate.setFont(new java.awt.Font("Dialog", 0, 16)); jTextreturndate.setText(""); jLabel5.setFont(new java.awt.Font("Dialog", 0, 16)); jLabel5.setText("還書日期"); xYLayout1.setWidth(478); xYLayout1.setHeight(368); this.getContentPane().add(jTextborrowdate, new XYConstraints(201, 161, 153, -1)); this.getContentPane().add(jLabel1, new XYConstraints(74, 60, 88, 33)); this.getContentPane().add(jButtonupdate, new XYConstraints(229, 312, 74, 27)); this.getContentPane().add(jButtonexit, new XYConstraints(303, 312, 75, 28)); this.getContentPane().add(jButtondicision, new XYConstraints(163, 312, -1, 28)); this.getContentPane().add(jButtonClear, new XYConstraints(96, 312, 66, 28)); this.getContentPane().add(jTextstudentname, new XYConstraints(202, 64, 150, 26)); this.getContentPane().add(jTextcomment, new XYConstraints(202, 246, 154, -1)); this.getContentPane().add(jLabel4, new XYConstraints(73, 257, 63, 29)); this.getContentPane().add(jLabel5, new XYConstraints(71, 210, 87, 29)); this.getContentPane().add(jLabel8, new XYConstraints(15, 13, 435, 25)); this.getContentPane().add(jTextbookname, new XYConstraints(201, 112, 154, 23)); this.getContentPane().add(jLabel2, new XYConstraints(73, 106, 89, 35)); this.getContentPane().add(jLabel3, new XYConstraints(70, 162, 87, 29)); this.getContentPane().add(jTextreturndate, new XYConstraints(203, 204, 153, -1)); } void jButtonexit_mouseClicked(MouseEvent e) { } void jButtonupdate_mouseClicked(MouseEvent e) { } void jButtondicision_mouseClicked(MouseEvent e) { String sql; //定義變量，用來判斷是否是第一個(gè)查詢條件 boolean isfirst =true; sql="select * from BookBorrow "; //如果款型的查詢條件不為空 if (jTextstudentname.getText().trim().length() ==0) {} else { sql=sql+" where studentname='"+jTextstudentname.getText().trim()+"'"; isfirst=false; } //如果顏色的查詢條件不為空 if (jTextbookname.getText().trim().length()==0) {} else { //如果是第一個(gè)查詢條件 if (isfirst) sql=sql+" where bookname='"+jTextbookname.getText().trim() +"'"; //如果是第二個(gè)查詢條件 else sql=sql+" and bookname='"+jTextbookname.getText().trim() +"'"; } //執(zhí)行數(shù)據(jù)庫的查詢操作 rs =db.getResult(sql); try { //判斷返回的結(jié)果集是否為空，若不為空顯示第一條記錄 if(! rs.equals(null) ) { rs.first(); jTextstudentname.setText(rs.getString("studentname")); jTextbookname.setText(rs.getString("bookname")); jTextborrowdate.setText(rs.getString("borrowdate")); jTextreturndate.setText(rs.getString("returndate")); jTextcomment.setText(rs.getString("comment")); } else { JOptionPane.showMessageDialog(null,"無次紀(jì)錄!"); } }//若出現(xiàn)異常，彈出警告對話框 catch (SQLException ex) { JOptionPane.showMessageDialog(null,"發(fā)生錯誤!"); } } void jButtonClear_mouseClicked(MouseEvent e) { jTextstudentname.setText(""); jTextbookname.setText(""); jTextborrowdate.setText(""); jTextreturndate.setText(""); jTextcomment.setText(""); }}class returnInfoUpdate_jButtonexit_mouseAdapter extends java.awt.event.MouseAdapter { returnInfoUpdate adaptee; returnInfoUpdate_jButtonexit_mouseAdapter(returnInfoUpdate adaptee) { this.adaptee = adaptee; } public void mouseClicked(MouseEvent e) { adaptee.jButtonexit_mouseClicked(e); }}class returnInfoUpdate_jButtonupdate_mouseAdapter extends java.awt.event.MouseAdapter { returnInfoUpdate adaptee; returnInfoUpdate_jButtonupdate_mouseAdapter(returnInfoUpdate adaptee) { this.adaptee = adaptee; } public void mouseClicked(MouseEvent e) { adaptee.jButtonupdate_mouseClicked(e); }}class returnInfoUpdate_jButtondicision_mouseAdapter extends java.awt.event.MouseAdapter { returnInfoUpdate adaptee; returnInfoUpdate_jButtondicision_mouseAdapter(returnInfoUpdate adaptee) { this.adaptee = adaptee; } public void mouseClicked(MouseEvent e) { adaptee.jButtondicision_mouseClicked(e); }}class returnInfoUpdate_jButtonClear_mouseAdapter extends java.awt.event.MouseAdapter { returnInfoUpdate adaptee; returnInfoUpdate_jButtonClear_mouseAdapter(returnInfoUpdate adaptee) { this.adaptee = adaptee; } public void mouseClicked(MouseEvent e) { adaptee.jButtonClear_mouseClicked(e); }}?? 快捷鍵說明
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