1.簡介：使用java和jdbc相關知識製作的軟體，實現使用者登入，圖書管理（增加、修改、刪除），圖書類別管理（增加、修改、刪除）等功能。專案參考自：http://www.java1234.com/a/yuanchuang/swing2/ 。瞭解應實現的功能後基本獨立完成，實現過程與參考專案大同小異。不足之處歡迎討論。

2.流程：建立properties檔案--->連線工程類--->DTO(idEntity類-->實體類)--->DAO(介面-->介面的實現類）--->介面。

JDBC的DTO和DAO可參考：https://blog.csdn.net/Tsai_Hui/article/details/79750299。

3.包結構：

4.資料庫結構：

5.介面：（1）管理員登入介面

（2）主介面

（3）圖書新增介面

（4）圖書修改介面

（5）圖書類別增加

（6）圖書類別修改

（7）關於我介面

4.程式碼展示——以書籍管理為例：

（1）書籍的id類和實體類

package com.caihui.entity;

public class IdEntity {

	private long id;

	public long getId() {
		return id;
	}

	public void setId(long id) {
		this.id = id;
	}

}
 

package com.caihui.entity;

public class Book extends IdEntity {

	private String bookName;
	private String author;
	private String sex;
	private String price;
	private int bookTypeId;
	private String bookDesc;

	public Book(String bookName, String author, String sex, String price, int bookTypeId, String bookDesc) {
		super();
		this.bookName = bookName;
		this.author = author;
		this.sex = sex;
		this.price = price;
		this.bookTypeId = bookTypeId;
		this.bookDesc = bookDesc;
	}

	public Book(String bookName, String author, int bookTypeId) {
		super();
		this.bookName = bookName;
		this.author = author;
		this.bookTypeId = bookTypeId;

	}

	public Book() {
	}

	public String getBookName() {
		return bookName;
	}

	public void setBookName(String bookName) {
		this.bookName = bookName;
	}

	public String getAuthor() {
		return author;
	}

	public void setAuthor(String author) {
		this.author = author;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public String getPrice() {
		return price;
	}

	public void setPrice(String price) {
		this.price = price;
	}

	public int getBookTypeId() {
		return bookTypeId;
	}

	public void setBookTypeId(int bookTypeId) {
		this.bookTypeId = bookTypeId;
	}

	public String getBookDesc() {
		return bookDesc;
	}

	public void setBookDesc(String bookDesc) {
		this.bookDesc = bookDesc;
	}

	@Override
	public String toString() {
		return "Book [bookName=" + bookName + ", author=" + author + ", sex=" + sex + ", price=" + price
				+ ", bookTypeId=" + bookTypeId + ", bookDesc=" + bookDesc + ", getId()=" + getId() + "]";
	}

}
 

（2）書籍的Dao類和Dao實現類

package com.caihui.dao;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;

import com.caihui.entity.Book;

public interface BookDao {

	public int save(Connection conn, Book book) throws SQLException;

	public int delete(Connection conn, String id) throws SQLException;

	public int update(Connection conn, String id, Book book) throws SQLException;

	public ResultSet list(Connection conn, Book book) throws SQLException;
}

package com.caihui.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import com.caihui.dao.BookDao;
import com.caihui.entity.Book;
import com.caihui.until.StringUntil;

public class BookDaoImpl implements BookDao {

	@Override
	public int save(Connection conn, Book book) throws SQLException {
		// TODO Auto-generated method stub
		String sql = "INSERT INTO b_book(bookName,author,sex,price,bookTypeId,bookDesc) VALUES(?,?,?,?,?,?)";
		PreparedStatement ps = conn.prepareStatement(sql);
		ps.setString(1, book.getBookName());
		ps.setString(2, book.getAuthor());
		ps.setString(3, book.getSex());
		ps.setString(4, book.getPrice());
		ps.setInt(5, book.getBookTypeId());
		ps.setString(6, book.getBookDesc());
		return ps.executeUpdate();
	}

	@Override
	public int delete(Connection conn, String id) throws SQLException {
		// TODO Auto-generated method stub
		String sql = "DELETE FROM b_book WHERE id = ?";
		PreparedStatement ps = conn.prepareStatement(sql);
		ps.setString(1, id);
		return ps.executeUpdate();
	}

	@Override
	public int update(Connection conn, String id, Book book) throws SQLException {
		// TODO Auto-generated method stub
		String sql = "UPDATE b_book SET bookName = ?,author = ?,sex = ?,price = ?,"
				+ "bookTypeId = ?,bookDesc = ? WHERE id = ?";
		PreparedStatement ps = conn.prepareStatement(sql);
		ps.setString(1, book.getBookName());
		ps.setString(2, book.getAuthor());
		ps.setString(3, book.getSex());
		ps.setString(4, book.getPrice());
		ps.setInt(5, book.getBookTypeId());
		ps.setString(6, book.getBookDesc());
		ps.setString(7, id);
		return ps.executeUpdate();
	}

	@Override
	public ResultSet list(Connection conn, Book book) throws SQLException {
		// TODO Auto-generated method stub
		StringBuffer sb = new StringBuffer("SELECT* FROM b_book ");
		if (StringUntil.isNotEmpty(book.getBookName())) {
			sb.append(" and bookName like '%" + book.getBookName() + "%'");
		}
		if (StringUntil.isNotEmpty(book.getAuthor())) {
			sb.append(" and author like '%" + book.getAuthor() + "%'");
		}
		sb.append(" and bookTypeId like '%" + book.getBookTypeId() + "%'");
		String sql = sb.toString().replaceFirst("and", "where");
		PreparedStatement ps = conn.prepareStatement(sql);
		return ps.executeQuery();
	}

}

package com.caihui.view;

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.swing.ButtonGroup;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;

import com.caihui.dao.BookDao;
import com.caihui.dao.BookTypeDao;
import com.caihui.entity.Book;
import com.caihui.entity.BookType;
import com.caihui.impl.BookDaoImpl;
import com.caihui.impl.BookTypeDaoImpl;
import com.caihui.until.ConnectionFactory;
import com.caihui.until.StringUntil;

public class BookAddInterFrame extends JInternalFrame {
	private JTextField tAddBook;
	private JTextField tAddAuthor;
	private JTextField tAddPrice;
	private final ButtonGroup buttonGroup = new ButtonGroup();
	private JButton buttonResetBookAdd;
	private JButton buttonBookAdd;
	private JTextArea tAddBookDesc;
	private JComboBox cbAddBookType;
	private JRadioButton rbMan;
	private JRadioButton rbWoman;

	private Connection conn = null;
	private BookTypeDao bookTypeDao = null;
	private Book book = null;
	private BookType bookType = null;
	private BookDao bookDao = null;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					BookAddInterFrame frame = new BookAddInterFrame();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public BookAddInterFrame() {
		setTitle("圖書新增");
		setIconifiable(true);
		setClosable(true);
		setBounds(100, 100, 431, 375);

		JLabel label = new JLabel("書名：");

		tAddBook = new JTextField();
		tAddBook.setColumns(10);

		JLabel label_1 = new JLabel("作者：");

		tAddAuthor = new JTextField();
		tAddAuthor.setColumns(10);

		JLabel label_2 = new JLabel("性別：");

		rbMan = new JRadioButton("男");
		buttonGroup.add(rbMan);
		rbMan.setSelected(true);

		rbWoman = new JRadioButton("女");
		buttonGroup.add(rbWoman);

		JLabel label_3 = new JLabel("價格：");

		tAddPrice = new JTextField();
		tAddPrice.setColumns(10);

		JLabel label_4 = new JLabel("圖書類別：");

		JLabel label_5 = new JLabel("圖書簡介：");

		tAddBookDesc = new JTextArea();

		cbAddBookType = new JComboBox();

		buttonBookAdd = new JButton("新增");
		buttonBookAdd.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				addBookAction();
			}
		});

		buttonResetBookAdd = new JButton("重置");
		buttonResetBookAdd.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				BookAddReset();
			}
		});
		GroupLayout groupLayout = new GroupLayout(getContentPane());
		groupLayout.setHorizontalGroup(groupLayout.createParallelGroup(Alignment.LEADING).addGroup(groupLayout
				.createSequentialGroup().addContainerGap()
				.addGroup(groupLayout.createParallelGroup(Alignment.TRAILING).addGroup(groupLayout
						.createSequentialGroup()
						.addGroup(groupLayout.createParallelGroup(Alignment.LEADING).addGroup(groupLayout
								.createSequentialGroup()
								.addGroup(groupLayout.createParallelGroup(Alignment.LEADING, false)
										.addGroup(groupLayout.createSequentialGroup().addComponent(label_4)
												.addPreferredGap(ComponentPlacement.RELATED).addComponent(cbAddBookType,
														0, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
										.addGroup(groupLayout.createSequentialGroup().addComponent(label)
												.addPreferredGap(ComponentPlacement.RELATED).addComponent(tAddBook,
														GroupLayout.PREFERRED_SIZE, 135, GroupLayout.PREFERRED_SIZE))
										.addGroup(groupLayout.createSequentialGroup().addComponent(label_2)
												.addPreferredGap(ComponentPlacement.UNRELATED).addComponent(rbMan)
												.addPreferredGap(ComponentPlacement.RELATED).addComponent(rbWoman)))
								.addGap(31)
								.addGroup(groupLayout.createParallelGroup(Alignment.LEADING).addComponent(label_3)
										.addComponent(label_1))
								.addPreferredGap(ComponentPlacement.RELATED)
								.addGroup(groupLayout.createParallelGroup(Alignment.LEADING, false)
										.addComponent(tAddAuthor)
										.addComponent(tAddPrice, GroupLayout.DEFAULT_SIZE, 89, Short.MAX_VALUE)))
								.addGroup(groupLayout.createSequentialGroup().addComponent(label_5)
										.addPreferredGap(ComponentPlacement.RELATED)
										.addComponent(tAddBookDesc, GroupLayout.DEFAULT_SIZE, 271, Short.MAX_VALUE)))
						.addGap(80))
						.addGroup(groupLayout.createSequentialGroup().addComponent(buttonBookAdd).addGap(18)
								.addComponent(buttonResetBookAdd).addGap(91)))));
		groupLayout.setVerticalGroup(groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup().addContainerGap()
						.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE).addComponent(label)
								.addComponent(tAddBook, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
										GroupLayout.PREFERRED_SIZE)
								.addComponent(tAddAuthor, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
										GroupLayout.PREFERRED_SIZE)
								.addComponent(label_1))
						.addGap(25)
						.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE).addComponent(label_2)
								.addComponent(rbMan).addComponent(rbWoman).addComponent(label_3)
								.addComponent(tAddPrice, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
										GroupLayout.PREFERRED_SIZE))
						.addGap(32)
						.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE).addComponent(label_4)
								.addComponent(cbAddBookType, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
										GroupLayout.PREFERRED_SIZE))
						.addGap(29)
						.addGroup(
								groupLayout.createParallelGroup(Alignment.BASELINE).addComponent(label_5).addComponent(
										tAddBookDesc, GroupLayout.PREFERRED_SIZE, 117, GroupLayout.PREFERRED_SIZE))
						.addGap(18).addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)
								.addComponent(buttonBookAdd).addComponent(buttonResetBookAdd))
						.addContainerGap(26, Short.MAX_VALUE)));
		getContentPane().setLayout(groupLayout);

		this.fillBookType(new BookType());
	}

	/**
	 * 新增書籍
	 */
	protected void addBookAction() {
		// TODO Auto-generated method stub
		String bookName = tAddBook.getText();
		String author = tAddAuthor.getText();
		String sex = "";
		String price = tAddPrice.getText();
		String bookDesc = tAddBookDesc.getText();

		if (StringUntil.isEmpty(bookName)) {
			JOptionPane.showMessageDialog(null, "圖書名不能為空");
			return;
		}
		if (StringUntil.isEmpty(author)) {
			JOptionPane.showMessageDialog(null, "作者不能為空");
			return;
		}
		if (StringUntil.isEmpty(price)) {
			JOptionPane.showMessageDialog(null, "價格不能為空");
			return;
		}
		if (rbMan.isSelected()) {
			sex = "男";
		} else {
			sex = "女";
		}
		try {
			String bookTypeName = (String) cbAddBookType.getSelectedItem();
			bookTypeDao = new BookTypeDaoImpl();
			conn = ConnectionFactory.getInstance().getConnection();
			String bookTypeIdString = bookTypeDao.searchId(conn, bookTypeName);
			int bookTypeId = Integer.valueOf(bookTypeIdString);
			book = new Book(bookName, author, sex, price, bookTypeId, bookDesc);
			bookDao = new BookDaoImpl();
			int n = bookDao.save(conn, book);
			if (n == 1) {
				JOptionPane.showMessageDialog(null, "圖書新增成功");
			} else {
				JOptionPane.showMessageDialog(null, "圖書新增失敗");
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	/**
	 * 重置書籍新增資訊
	 */
	protected void BookAddReset() {
		// TODO Auto-generated method stub
		tAddAuthor.setText(null);
		tAddBook.setText(null);
		tAddBookDesc.setText(null);
		tAddPrice.setText(null);
		rbMan.setSelected(true);
		cbAddBookType.setSelectedIndex(-1);
	}

	/**
	 * 初始化圖書類別下拉框
	 */
	private void fillBookType(BookType bookType) {
		try {
			conn = ConnectionFactory.getInstance().getConnection();
			bookTypeDao = new BookTypeDaoImpl();
			ResultSet rs = bookTypeDao.list(conn, bookType);
			while (rs.next()) {
				bookType = new BookType();
				bookType.setId(rs.getLong("id"));
				bookType.setBookTypeName(rs.getString("bookTypeName"));
				this.cbAddBookType.addItem(bookType.getBookTypeName());
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

}

package com.caihui.view;

import java.awt.Color;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;

import javax.swing.ButtonGroup;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.UIManager;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;

import com.caihui.dao.BookDao;
import com.caihui.dao.BookTypeDao;
import com.caihui.entity.Book;
import com.caihui.entity.BookType;
import com.caihui.impl.BookDaoImpl;
import com.caihui.impl.BookTypeDaoImpl;
import com.caihui.until.ConnectionFactory;

public class BookMangerInterFrame extends JInternalFrame {
	private JTextField tsBookName;
	private JTextField tsAuthor;
	private JTable tBookList;
	private JComboBox csBookTypeId;
	private JButton bSearch;
	private JScrollPane scrollPane;
	private JButton bBookUpdate;
	private JButton bBookDelete;

	private Connection conn = null;
	private Book book = null;
	private BookDao bookDao = null;
	private BookType bookType = null;
	private BookTypeDao bookTypeDao = null;

	private JLabel label_3;
	private JLabel label_4;
	private JLabel label_5;
	private JTextField tlBookId;
	private JTextField tlBookName;
	private JTextField tlBookPrice;
	private JLabel label_6;
	private JTextField tlAuthor;
	private JLabel label_7;
	private JLabel label_8;
	private JLabel label_9;
	private JTextArea tlBookDesc;
	private JComboBox cUpdateBookType;
	private final ButtonGroup buttonGroup = new ButtonGroup();
	private JRadioButton rbAddMan;
	private JRadioButton rbAddWoman;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					BookMangerInterFrame frame = new BookMangerInterFrame();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the frame.
	 */
	public BookMangerInterFrame() {
		setClosable(true);
		setIconifiable(true);
		setBounds(100, 100, 688, 509);

		JLabel label = new JLabel("書名：");

		JLabel label_1 = new JLabel("作者：");

		JLabel label_2 = new JLabel("類別：");

		tsBookName = new JTextField();
		tsBookName.setColumns(10);

		tsAuthor = new JTextField();
		tsAuthor.setColumns(10);

		csBookTypeId = new JComboBox();

		bSearch = new JButton("搜  索");
		bSearch.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				searchBookAction();
			}
		});

		scrollPane = new JScrollPane();

		JPanel panel = new JPanel();
		panel.setBorder(new TitledBorder(UIManager.getBorder("TitledBorder.border"), "\u4E66\u7C4D\u8BE6\u60C5",
				TitledBorder.LEADING, TitledBorder.TOP, null, new Color(0, 0, 0)));

		bBookUpdate = new JButton("修改");
		bBookUpdate.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				bookUpdateAction();
			}
		});

		bBookDelete = new JButton("刪除");
		bBookDelete.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				bookDeleteAction();
			}
		});
		GroupLayout groupLayout = new GroupLayout(getContentPane());
		groupLayout.setHorizontalGroup(groupLayout.createParallelGroup(Alignment.LEADING).addGroup(groupLayout
				.createSequentialGroup().addGap(23)
				.addGroup(groupLayout.createParallelGroup(Alignment.TRAILING)
						.addGroup(groupLayout.createSequentialGroup().addComponent(bBookUpdate).addGap(18)
								.addComponent(bBookDelete).addGap(14))
						.addGroup(groupLayout.createParallelGroup(Alignment.LEADING, false)
								.addGroup(groupLayout.createSequentialGroup().addComponent(label)
										.addPreferredGap(ComponentPlacement.RELATED)
										.addComponent(tsBookName, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
												GroupLayout.PREFERRED_SIZE)
										.addGap(27).addComponent(label_1).addPreferredGap(ComponentPlacement.RELATED)
										.addComponent(tsAuthor, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
												GroupLayout.PREFERRED_SIZE)
										.addGap(16).addComponent(label_2).addPreferredGap(ComponentPlacement.RELATED)
										.addComponent(csBookTypeId, GroupLayout.PREFERRED_SIZE, 107,
												GroupLayout.PREFERRED_SIZE)
										.addGap(18).addComponent(bSearch, GroupLayout.PREFERRED_SIZE, 76,
												GroupLayout.PREFERRED_SIZE))
								.addComponent(scrollPane).addComponent(panel, Alignment.TRAILING,
										GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
				.addContainerGap(153, Short.MAX_VALUE)));
		groupLayout.setVerticalGroup(groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup().addGap(20)
						.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE).addComponent(label)
								.addComponent(label_1).addComponent(label_2)
								.addComponent(tsBookName, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
										GroupLayout.PREFERRED_SIZE)
								.addComponent(tsAuthor, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
										GroupLayout.PREFERRED_SIZE)
								.addComponent(csBookTypeId, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
										GroupLayout.PREFERRED_SIZE)
								.addComponent(bSearch))
						.addGap(18)
						.addComponent(scrollPane, GroupLayout.PREFERRED_SIZE, 148, GroupLayout.PREFERRED_SIZE)
						.addPreferredGap(ComponentPlacement.UNRELATED)
						.addComponent(panel, GroupLayout.PREFERRED_SIZE, 189, GroupLayout.PREFERRED_SIZE).addGap(18)
						.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE).addComponent(bBookDelete)
								.addComponent(bBookUpdate))
						.addContainerGap(30, Short.MAX_VALUE)));

		label_3 = new JLabel("編號：");

		label_4 = new JLabel("書名：");

		label_5 = new JLabel("價格：");

		tlBookId = new JTextField();
		tlBookId.setEditable(false);
		tlBookId.setColumns(10);

		tlBookName = new JTextField();
		tlBookName.setColumns(10);

		tlBookPrice = new JTextField();
		tlBookPrice.setColumns(10);

		label_6 = new JLabel("作者：");

		tlAuthor = new JTextField();
		tlAuthor.setColumns(10);

		label_7 = new JLabel("性別：");

		label_8 = new JLabel("書籍類別：");

		label_9 = new JLabel("書籍描述：");

		tlBookDesc = new JTextArea();

		cUpdateBookType = new JComboBox();

		rbAddMan = new JRadioButton("男");
		rbAddMan.setSelected(true);
		buttonGroup.add(rbAddMan);

		rbAddWoman = new JRadioButton("女");
		buttonGroup.add(rbAddWoman);
		GroupLayout gl_panel = new GroupLayout(panel);
		gl_panel.setHorizontalGroup(gl_panel.createParallelGroup(Alignment.LEADING).addGroup(gl_panel
				.createSequentialGroup().addContainerGap()
				.addGroup(gl_panel.createParallelGroup(Alignment.LEADING, false).addGroup(gl_panel
						.createSequentialGroup()
						.addGroup(gl_panel.createParallelGroup(Alignment.LEADING, false)
								.addGroup(gl_panel.createSequentialGroup().addComponent(label_3)
										.addPreferredGap(ComponentPlacement.RELATED).addComponent(tlBookId))
								.addGroup(gl_panel.createSequentialGroup().addComponent(label_6)
										.addPreferredGap(ComponentPlacement.RELATED).addComponent(tlAuthor,
												GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
												GroupLayout.PREFERRED_SIZE)))
						.addGap(27)
						.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
								.addGroup(gl_panel.createSequentialGroup().addComponent(label_7)
										.addPreferredGap(ComponentPlacement.RELATED).addComponent(rbAddMan)
										.addPreferredGap(ComponentPlacement.RELATED).addComponent(rbAddWoman))
								.addGroup(gl_panel.createSequentialGroup().addComponent(label_4)
										.addPreferredGap(ComponentPlacement.RELATED).addComponent(tlBookName,
												GroupLayout.PREFERRED_SIZE, 94, GroupLayout.PREFERRED_SIZE)))
						.addGap(18)
						.addGroup(gl_panel.createParallelGroup(Alignment.LEADING)
								.addGroup(gl_panel.createSequentialGroup().addComponent(label_5)
										.addPreferredGap(ComponentPlacement.RELATED).addComponent(tlBookPrice))
								.addGroup(gl_panel.createSequentialGroup().addComponent(label_8)
										.addPreferredGap(ComponentPlacement.RELATED).addComponent(cUpdateBookType,
												GroupLayout.PREFERRED_SIZE, 87, GroupLayout.PREFERRED_SIZE))))
						.addGroup(gl_panel.createSequentialGroup().addComponent(label_9)
								.addPreferredGap(ComponentPlacement.RELATED).addComponent(tlBookDesc)))
				.addContainerGap(38, Short.MAX_VALUE)));
		gl_panel.setVerticalGroup(
				gl_panel.createParallelGroup(Alignment.LEADING)
						.addGroup(
								gl_panel.createSequentialGroup().addContainerGap()
										.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE).addComponent(label_3)
												.addComponent(tlBookId, GroupLayout.PREFERRED_SIZE,
														GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
												.addComponent(label_4)
												.addComponent(tlBookName, GroupLayout.PREFERRED_SIZE,
														GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
												.addComponent(label_5)
												.addComponent(tlBookPrice, GroupLayout.PREFERRED_SIZE,
														GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
										.addGap(18)
										.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE).addComponent(label_6)
												.addComponent(tlAuthor, GroupLayout.PREFERRED_SIZE,
														GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
												.addComponent(rbAddMan).addComponent(label_7).addComponent(rbAddWoman)
												.addComponent(label_8)
												.addComponent(cUpdateBookType, GroupLayout.PREFERRED_SIZE,
														GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
										.addGap(18)
										.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE).addComponent(label_9)
												.addComponent(tlBookDesc, GroupLayout.PREFERRED_SIZE, 67,
														GroupLayout.PREFERRED_SIZE))
										.addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)));
		panel.setLayout(gl_panel);

		tBookList = new JTable();
		tBookList.addMouseListener(new MouseAdapter() {
			@Override
			public void mousePressed(MouseEvent e) {
				mousePressedAction();
			}
		});
		tBookList.setModel(
				new DefaultTableModel(new Object[][] {}, new String[] { "\u7F16\u53F7", "\u4E66\u540D", "\u4F5C\u8005",
						"\u6027\u522B", "\u4EF7\u683C", "\u4E66\u7C4D\u7C7B\u522B", "\u4E66\u7C4D\u63CF\u8FF0" }) {
					boolean[] columnEditables = new boolean[] { false, false, false, false, false, false, false };

					public boolean isCellEditable(int row, int column) {
						return columnEditables[column];
					}
				});
		scrollPane.setViewportView(tBookList);
		getContentPane().setLayout(groupLayout);

		this.fillBookType(csBookTypeId, new BookType());
		this.fillBookType(cUpdateBookType, new BookType());
	}

	/**
	 * 在列表中滑鼠選擇書籍
	 */
	protected void mousePressedAction() {
		// TODO Auto-generated method stub
		int row = tBookList.getSelectedRow();
		tlBookId.setText(tBookList.getValueAt(row, 0).toString());
		tlBookName.setText(tBookList.getValueAt(row, 1).toString());
		tlAuthor.setText(tBookList.getValueAt(row, 2).toString());
		String sex = tBookList.getValueAt(row, 3).toString();
		if (sex.equals("女")) {
			rbAddWoman.setSelected(true);
		}
		tlBookPrice.setText(tBookList.getValueAt(row, 4).toString());
		String bookType = tBookList.getValueAt(row, 5).toString();
		int n = cUpdateBookType.getItemCount();
		for (int i = 0; i < n; i++) {
			cUpdateBookType.setSelectedIndex(i);
			String s = cUpdateBookType.getSelectedItem().toString();
			if (bookType.equals(s)) {
				break;
			}
		}
		tlBookDesc.setText(tBookList.getValueAt(row, 6).toString());
	}

	/**
	 * 刪除書籍
	 */
	protected void bookDeleteAction() {
		// TODO Auto-generated method stub
		try {
			conn = ConnectionFactory.getInstance().getConnection();
			String id = tlBookId.getText();
			bookDao = new BookDaoImpl();
			int n = bookDao.delete(conn, id);
			if (n == 1) {
				JOptionPane.showMessageDialog(null, "書籍刪除成功");
			} else {
				JOptionPane.showMessageDialog(null, "書籍刪除失敗");
			}
			this.BookAddReset();
			this.searchBookAction();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			JOptionPane.showMessageDialog(null, "書籍刪除失敗");
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	/**
	 * 書籍資訊更新
	 */
	protected void bookUpdateAction() {
		// TODO Auto-generated method stub
		String id = tlBookId.getText();
		String bookName = tlBookName.getText();
		String author = tlAuthor.getText();
		String sex = "男";
		if (rbAddWoman.isSelected()) {
			sex = "女";
		}
		String price = tlBookPrice.getText();
		String bookTypeName = cUpdateBookType.getSelectedItem().toString();
		String bookDesc = tlBookDesc.getText();
		try {
			bookTypeDao = new BookTypeDaoImpl();
			bookDao = new BookDaoImpl();
			conn = ConnectionFactory.getInstance().getConnection();
			String bookTypeIdString = bookTypeDao.searchId(conn, bookTypeName);
			int bookTypeId = Integer.valueOf(bookTypeIdString);
			book = new Book(bookName, author, sex, price, bookTypeId, bookDesc);
			int n = bookDao.update(conn, id, book);
			if (n == 1) {
				JOptionPane.showMessageDialog(null, "書籍更新成功");
			} else {
				JOptionPane.showMessageDialog(null, "書籍更新失敗");
			}
			this.BookAddReset();
			this.searchBookAction();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	/**
	 * 查詢書籍
	 */
	private void searchBookAction() {
		DefaultTableModel dtm = (DefaultTableModel) tBookList.getModel();
		dtm.setRowCount(0);
		String bookName = tsBookName.getText();
		String author = tsAuthor.getText();
		try {
			conn = ConnectionFactory.getInstance().getConnection();
			bookDao = new BookDaoImpl();
			bookTypeDao = new BookTypeDaoImpl();
			String bookTypeName = (String) csBookTypeId.getSelectedItem();
			String bookTypeIdString = bookTypeDao.searchId(conn, bookTypeName);
			int bookTypeId = Integer.valueOf(bookTypeIdString);
			book = new Book(bookName, author, bookTypeId);
			ResultSet rs = bookDao.list(conn, book);
			while (rs.next()) {
				Vector v = new Vector();
				v.add(rs.getString("id"));
				v.add(rs.getString("bookName"));
				v.add(rs.getString("author"));
				v.add(rs.getString("sex"));
				v.add(rs.getString("price"));
				v.add(bookTypeDao.searchTypeName(conn, rs.getString("bookTypeId")));
				v.add(rs.getString("bookDesc"));
				dtm.addRow(v);
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	/**
	 * 初始化下拉表
	 * 
	 * @param bookType
	 */
	private void fillBookType(JComboBox cJComboBox, BookType bookType) {
		try {
			conn = ConnectionFactory.getInstance().getConnection();
			bookTypeDao = new BookTypeDaoImpl();
			ResultSet rs = bookTypeDao.list(conn, bookType);
			while (rs.next()) {
				bookType = new BookType();
				bookType.setId(rs.getLong("id"));
				bookType.setBookTypeName(rs.getString("bookTypeName"));
				cJComboBox.addItem(bookType.getBookTypeName());
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	/**
	 * 重置詳情框
	 */
	protected void BookAddReset() {
		// TODO Auto-generated method stub
		tlAuthor.setText(null);
		tlBookDesc.setText(null);
		tlBookId.setText(null);
		tlBookName.setText(null);
		tlBookPrice.setText(null);
		cUpdateBookType.setSelectedIndex(-1);
		rbAddMan.setSelected(true);
	}
}

（5）工具類（空字元判斷類，連線工廠類）

package com.caihui.until;

public class StringUntil {

	public static boolean isEmpty(String s) {
		if (s == null || "".equals(s.trim())) {
			return true;
		} else {
			return false;
		}
	}

	public static boolean isNotEmpty(String s) {
		if (s != null && !"".equals(s.trim())) {
			return true;
		} else {
			return false;
		}
	}

}

package com.caihui.until;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

public class ConnectionFactory {

	private static String driver;
	private static String dburl;
	private static String user;
	private static String password;

	private static final ConnectionFactory factory = new ConnectionFactory();

	Connection conn = null;

	static {

		Properties prop = new Properties();

		try {
			InputStream in = ConnectionFactory.class.getClassLoader().getResourceAsStream("dbconfig.properties");// 啟動類的載入器
			prop.load(in);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			System.out.println("===屬性配製失敗===");
		}

		driver = prop.getProperty("driver");
		dburl = prop.getProperty("dburl");
		user = prop.getProperty("user");
		password = prop.getProperty("password");

	}

	private ConnectionFactory() {

	}

	public static ConnectionFactory getInstance() {
		return factory;
	}

	/**
	 * 開啟資料庫連線
	 */

	public Connection getConnection() {

		try {
			Class.forName(driver);
			conn = DriverManager.getConnection(dburl, user, password);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return conn;

	}

	/**
	 * 關閉資料庫連線 因為connection佔用資源較多
	 */
	public void closeConnection() throws Exception {
		if (conn != null) {
			conn.close();
		}
	}

}