图书信息管理java实现代码

分类：菜鸟笔记作者：编程之家用户

图书信息管理与读者信息管理相似，共包括两部分，图书添加和图书查询与修改，图书信息添加要求正确输入图书的八项信息，并且ISBN编号唯一，实现过程中要将ISBN作为主键。下面看实现过程：

数据库中书籍：

添加书籍过程：

数据库内容增加：

图书的查询与修改：查询过程可以根据不同的条件查询，如ISBN，作者，出版社，图书名称等，默认将所有图书全部显示在列表中，输入查询条件后再表格中显示查询结果。

本模块用到标签面板，可以很方便的查询所需要的信息。修改过程输入ISBN编号后按回车键将在下方显示所有的图书信息，然后修改图书信息后所有内容就会更新。

图书查询：

图书信息修改：

添加图书源代码如下：AddBook.java

package pdsu.bbm.view; 
 
import java.awt.BorderLayout; 
import java.awt.FlowLayout; 
import java.awt.Font; 
import java.awt.Image; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.text.ParseException; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
import java.util.Iterator; 
import java.util.List; 
import javax.swing.ButtonGroup; 
import javax.swing.ImageIcon; 
import javax.swing.JButton; 
import javax.swing.JComboBox; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JPanel; 
import javax.swing.JTextField; 
import pdsu.bbm.dao.BookDao; 
import pdsu.bbm.dao.BookTypeDao; 
import pdsu.bbm.model.Book; 
import pdsu.bbm.model.BookType; 
public class AddBook extends JFrame implements ActionListener { 
 
 private JPanel contentPane; 
 private JLabel label_1; 
 private JLabel lbll; 
 private JLabel label_2; 
 private JLabel label_3; 
 private JLabel label_4; 
 private JLabel label_5; 
 JPanel centerpPanel; 
 JButton button1,button2,button3; 
 private JComboBox comboBox_1; 
 Image icon = new ImageIcon("image/icon.png").getImage(); 
 private JTextField ISBNfiled; 
 private JTextField publishField; 
 private JTextField publishDateField; 
 private JTextField publishTime; 
 private JTextField unitPriceField; 
 private JTextField bookNameField; 
 private JTextField authorFiled; 
 public static void main(String[] args) { 
 new AddBook(); 
 } 
 public AddBook() { 
 setTitle("添加图书信息"); 
 setSize(555,333); 
 setIconImage(icon); 
 setLocationRelativeTo(null); 
 
 setTitle("添加图书信息"); 
 setSize(555,334); 
 setLocationRelativeTo(null); 
 setVisible(true); 
 centerpPanel = new JPanel(); 
 centerpPanel.setLayout(null); 
 JLabel label1 = new JLabel("ISBN:"); 
 label1.setFont(new Font("宋体",Font.PLAIN,20)); 
 label1.setBounds(71,26,95,42); 
 centerpPanel.add(label1); 
 
 ISBNfiled = new JTextField(); 
 ISBNfiled.setBounds(120,30,110,30); 
 centerpPanel.add(ISBNfiled); 
 ISBNfiled.setColumns(10); 
 
 JLabel label = new JLabel("类 别:"); 
 label.setFont(new Font("宋体",20)); 
 label.setBounds(306,116,35); 
 centerpPanel.add(label); 
 
 label_1 = new JLabel("书 名:"); 
 label_1.setFont(new Font("宋体",20)); 
 label_1.setBounds(50,75,154,50); 
 centerpPanel.add(label_1); 
 
 lbll = new JLabel("作 者:"); 
 lbll.setFont(new Font("宋体",20)); 
 lbll.setBounds(306,137,50); 
 centerpPanel.add(lbll); 
 
 label_2 = new JLabel("出版社:"); 
 label_2.setFont(new Font("宋体",20)); 
 label_2.setBounds(50,130,50); 
 centerpPanel.add(label_2); 
 
 label_3 = new JLabel("出版日期:"); 
 label_3.setFont(new Font("宋体",20)); 
 label_3.setBounds(285,135,50); 
 centerpPanel.add(label_3); 
 
 publishField = new JTextField(); 
 publishField.setColumns(10); 
 publishField.setBounds(120,143,30); 
 centerpPanel.add(publishField); 
 
 publishDateField = new JTextField(); 
 publishDateField.setColumns(10); 
 publishDateField.setBounds(380,120,30); 
 centerpPanel.add(publishDateField); 
 
 label_4 = new JLabel("印刷次数:"); 
 label_4.setFont(new Font("宋体",20)); 
 label_4.setBounds(28,190,50); 
 centerpPanel.add(label_4); 
 
 publishTime = new JTextField(); 
 publishTime.setColumns(10); 
 publishTime.setBounds(120,203,30); 
 centerpPanel.add(publishTime); 
 
 label_5 = new JLabel("单 价:"); 
 label_5.setFont(new Font("宋体",20)); 
 label_5.setBounds(305,194,84,42); 
 centerpPanel.add(label_5); 
 
 unitPriceField = new JTextField(); 
 unitPriceField.setColumns(10); 
 unitPriceField.setBounds(380,30); 
 centerpPanel.add(unitPriceField); 
 getContentPane().add(centerpPanel,BorderLayout.CENTER); 
 
 bookNameField = new JTextField(); 
 bookNameField.setColumns(10); 
 bookNameField.setBounds(120,86,30); 
 centerpPanel.add(bookNameField); 
 
 authorFiled = new JTextField(); 
 authorFiled.setColumns(10); 
 authorFiled.setBounds(380,30); 
 centerpPanel.add(authorFiled); 
 
 List<BookType> rs = BookTypeDao.selectBookType(); 
 Iterator<BookType> iterator = rs.iterator(); 
 String[] AllTypeName = new String[rs.size()]; 
 int i = 0; 
 while (iterator.hasNext()) { 
  String typename = iterator.next().getTypename(); 
  AllTypeName[i] = typename; 
  i++; 
 } 
 comboBox_1 = new JComboBox(AllTypeName); 
 comboBox_1.setBounds(380,30); 
 comboBox_1.setFont(new Font("宋体",16)); 
 
 centerpPanel.add(comboBox_1); 
 ButtonGroup group = new ButtonGroup(); 
 JPanel panel2 = new JPanel(); 
 panel2.setLayout(new FlowLayout()); 
 button1 = new JButton("添加"); 
 button1.setFont(new Font("宋体",20)); 
 
 button2 = new JButton("关闭"); 
 button2.setFont(new Font("宋体",20)); 
 button3 = new JButton("重置"); 
 button3.setFont(new Font("宋体",20)); 
 
 panel2.add(button1); 
 panel2.add(button3); 
 panel2.add(button2); 
 button1.addActionListener(this); 
 button2.addActionListener(this); 
 button3.addActionListener(this); 
 getContentPane().add(panel2,BorderLayout.SOUTH); 
 
 setVisible(true); 
 } 
 
 @SuppressWarnings("unused") 
 public void actionPerformed(ActionEvent e) { 
 if (e.getSource() == button1) { 
  String Isbn = ISBNfiled.getText().toString(); 
 
  String bookname = bookNameField.getText(); 
  String author = authorFiled.getText(); 
  String selectType = comboBox_1.getSelectedItem().toString(); 
  String publish = publishField.getText(); 
  String publishdate = publishDateField.getText(); 
  String time = publishTime.getText().trim(); 
  String price = unitPriceField.getText().trim(); 
 
  if (Isbn.equals("") || bookname.equals("") || author.equals("") 
   || selectType.equals("") || publish.equals("") 
   || publishdate.equals("") || time.equals("") 
   || price.equals("")) { 
  JOptionPane.showMessageDialog(this,"请输入完整信息"); 
  return; 
  } else { 
  BookType bt = new BookType(); 
  Book book = new Book(); 
  book.setISBN(Isbn); 
  book.setBookname(bookname); 
  book.setAuthor(author); 
  bt.setTypename(selectType); 
  int m = 0; 
  List<BookType> list = BookTypeDao 
   .selectIdByTypename(selectType); 
  Iterator<BookType> ite = list.iterator(); 
  while (ite.hasNext()) { 
   m = ite.next().getId(); 
  } 
  book.setTypeid(m + ""); 
  book.setPublish(publish); 
  try { 
   book.setPublishtime(Integer.parseInt(time)); 
   book.setUnitprice(Integer.parseInt(price)); 
  } catch (NumberFormatException e1) { 
   e1.printStackTrace(); 
  } 
   
   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 
   Date regDate = null; 
   try { 
   regDate =sdf.parse(publishdate); 
   } catch (ParseException e1) { 
   JOptionPane.showMessageDialog(this,"请输入正确的日期"); 
   publishDateField.setText(""); 
   } 
   
   book.setPublishdate(regDate); 
  if(regDate==null) return; 
   
   if (BookDao.selectBookByISBN(Isbn) != null) { 
   JOptionPane.showMessageDialog(this,"该ISBN编号已存在"); 
   return; 
  } else if (BookDao.insertBook(book) != 0) { 
   JOptionPane.showMessageDialog(this,"添加成功"); 
  } else 
   JOptionPane.showMessageDialog(this,"添加失败"); 
  } 
 } 
 if (e.getSource() == button3) { 
  ISBNfiled.setText(""); 
  bookNameField.setText(""); 
  authorFiled.setText(""); 
  publishField.setText(""); 
  publishDateField.setText(""); 
  publishTime.setText(""); 
  unitPriceField.setText(""); 
 } 
 if (e.getSource() == button2) { 
  dispose(); 
  new MainWindow(); 
 
 } 
 } 
 
}

图书查询与修改源代码：BookSelectandModify.java

package pdsu.bbm.view; 
 
import java.awt.BorderLayout; 
import java.awt.Dimension; 
import java.awt.Font; 
import java.awt.GridLayout; 
import java.awt.Image; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.text.SimpleDateFormat; 
import java.util.ArrayList; 
import java.util.Date; 
import java.util.Iterator; 
import java.util.List; 
import javax.swing.ImageIcon; 
import javax.swing.JButton; 
import javax.swing.JComboBox; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTabbedPane; 
import javax.swing.JTable; 
import javax.swing.JTextField; 
import javax.swing.SwingConstants; 
import javax.swing.table.TableModel; 
import pdsu.bbm.dao.BookDao; 
import pdsu.bbm.dao.BookTypeDao; 
import pdsu.bbm.model.Book; 
import pdsu.bbm.model.BookType; 
 
public class BookSelectandModify extends JFrame implements ActionListener { 
 // 设置序列号 
 private static final long serialVersionUID = 1L; 
 private JTabbedPane jtabbedPane; // 标签面板 
 // selectJP查询面板 select_conditionJP下拉列表面板 select_resultJP结果按钮面板updateJP修改面板 
 // updateJP修改面板,bookJP中间面板 buttonJP2按钮面板 
 private JPanel selectJP,select_conditionJP,select_resultJP,buttonJP1,bookJP,updateJP,buttonJP2;// 
 private JTextField selectJTF,ISBNJTF,booknameJTF,authorJTF,printtimeJTF,publishJTF,publishdateJTF,unitpriceJTF; 
 private JLabel ISBNJL,booknameJL,authorJL,categoryJL,printtimeJL,publishJL,publishdateJL,unitpriceJL; 
 // 重点! 
 private JTable jtable;// 定义表格 
 private JComboBox choiceJCB,booktypeJCB; 
 private JScrollPane jscrollPane; 
 private JButton selectJB,exitJB,updateJB,resetJB;// 查询按钮，退出按钮,修改按钮，关闭按钮 
 private TableModel getSelect; 
 private String[] title = { "ISBN","图书序列","图书名称","作者"," 出版社 ","出版日期","印刷次数","单价" }; 
 Image icon = new ImageIcon("image/icon.png").getImage(); 
 
 public BookSelectandModify() { 
 super(); 
 setIconImage(icon); 
 setTitle("图书查询与修改"); 
 setBounds(100,100,555,400); 
 setLocationRelativeTo(null); 
 // JTabbedPane选项卡 
 jtabbedPane = new JTabbedPane(); 
 add(jtabbedPane); 
 selectJP = new JPanel(); 
 selectJP.setLayout(new BorderLayout()); 
 jtabbedPane.add("图书信息查询",selectJP); 
 
 // 查询条件面板 
 select_conditionJP = new JPanel(); 
 choiceJCB = new JComboBox(); 
 String array[] = { "ISBN","出版社","所有" };// 设置为一维数组 
 for (int i = 0; i < array.length; i++) { 
  choiceJCB.addItem(array[i]); 
 } 
 select_conditionJP.add(choiceJCB); 
 selectJTF = new JTextField(20); 
 select_conditionJP.add(selectJTF); 
 selectJP.add(select_conditionJP,BorderLayout.NORTH); 
 // 查询结果面板 
 select_resultJP = new JPanel(); 
 BookDao dao = new BookDao(); 
 List<Book> list = dao.selectBook(); 
 jtable = new JTable(getSelect(list),title); 
 
 // !设置表格大小不变 
 jtable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
 // !设置列宽 
 jtable.getColumnModel().getColumn(4).setPreferredWidth(175); 
 jscrollPane = new JScrollPane(jtable);// 把表格加入滚动面板 
 // 显示滚动面板边框 
 jscrollPane.setPreferredSize(new Dimension(450,170)); 
 select_resultJP.add(jscrollPane); 
 selectJP.add(select_resultJP,BorderLayout.CENTER); 
 // 查询按钮面板 
 buttonJP1 = new JPanel(); 
 selectJB = new JButton("查询"); 
 selectJB.setFont(new Font("宋体",20)); 
 
 selectJB.addActionListener(this); 
 buttonJP1.add(selectJB); 
 exitJB = new JButton("退出"); 
 exitJB.setFont(new Font("宋体",20)); 
 exitJB.addActionListener(this); 
 buttonJP1.add(exitJB); 
 selectJP.add(buttonJP1,BorderLayout.SOUTH); 
 // 信息修改页面 
 updateJP = new JPanel(); 
 updateJP.setLayout(new BorderLayout()); 
 jtabbedPane.addTab("图书信息修改",updateJP); 
 bookJP = new JPanel(); 
 final GridLayout gridLayout = new GridLayout(8,2); 
 // 设置边框间的距离 
 gridLayout.setVgap(8); 
 gridLayout.setHgap(8); 
 bookJP.setLayout(gridLayout); 
 ISBNJL = new JLabel("ISBN:"); 
 ISBNJL.setFont(new Font("宋体",20)); 
 ISBNJL.setHorizontalAlignment(SwingConstants.CENTER); 
 bookJP.add(ISBNJL); 
 ISBNJTF = new JTextField(20); 
 ISBNJTF.addActionListener(this); 
 bookJP.add(ISBNJTF); 
 categoryJL = new JLabel("类 别:"); 
 categoryJL.setFont(new Font("宋体",20)); 
 categoryJL.setHorizontalAlignment(SwingConstants.CENTER); 
 bookJP.add(categoryJL); 
 // 下拉列表 
 List<BookType> list1 = BookTypeDao.selectBookType(); 
 Iterator<BookType> it = list1.iterator(); 
 String ty[] = new String[list1.size()]; 
 int i = 0; 
 booktypeJCB = new JComboBox(); 
 while (it.hasNext()) { 
  ty[i] = it.next().getTypename(); 
  booktypeJCB.addItem(ty[i]); 
  i++; 
 } 
 
 bookJP.add(booktypeJCB); 
 
 booknameJL = new JLabel("书 名:"); 
 booknameJL.setFont(new Font("宋体",20)); 
 booknameJL.setHorizontalAlignment(SwingConstants.CENTER); 
 bookJP.add(booknameJL); 
 booknameJTF = new JTextField(); 
 booknameJTF.setColumns(20); 
 bookJP.add(booknameJTF); 
 
 authorJL = new JLabel("作 者:"); 
 authorJL.setFont(new Font("宋体",20)); 
 authorJL.setHorizontalAlignment(SwingConstants.CENTER); 
 bookJP.add(authorJL); 
 authorJTF = new JTextField(); 
 authorJTF.setColumns(20); 
 bookJP.add(authorJTF); 
 
 publishJL = new JLabel("出版社:"); 
 publishJL.setFont(new Font("宋体",20)); 
 publishJL.setHorizontalAlignment(SwingConstants.CENTER); 
 bookJP.add(publishJL); 
 publishJTF = new JTextField(); 
 bookJP.add(publishJTF); 
 
 publishdateJL = new JLabel("出版日期:"); 
 publishdateJL.setFont(new Font("宋体",20)); 
 publishdateJL.setHorizontalAlignment(SwingConstants.CENTER); 
 bookJP.add(publishdateJL); 
 publishdateJTF = new JTextField(); 
 publishdateJTF.setHorizontalAlignment(SwingConstants.LEFT); 
 bookJP.add(publishdateJTF); 
 
 printtimeJL = new JLabel("印刷次数:"); 
 printtimeJL.setFont(new Font("宋体",20)); 
 printtimeJL.setHorizontalAlignment(SwingConstants.CENTER); 
 bookJP.add(printtimeJL); 
 printtimeJTF = new JTextField(); 
 bookJP.add(printtimeJTF); 
 
 unitpriceJL = new JLabel("单 价:"); 
 unitpriceJL.setFont(new Font("宋体",20)); 
 unitpriceJL.setHorizontalAlignment(SwingConstants.CENTER); 
 bookJP.add(unitpriceJL); 
 unitpriceJTF = new JTextField(); 
 bookJP.add(unitpriceJTF); 
 // 按钮面板 
 // 按钮面板设计 
 buttonJP2 = new JPanel(); 
 updateJB = new JButton("修改"); 
 updateJB.setFont(new Font("宋体",20)); 
 
 updateJB.addActionListener(this); 
 resetJB = new JButton("关闭"); 
 resetJB.setFont(new Font("宋体",20)); 
 
 resetJB.addActionListener(this); 
 buttonJP2.add(updateJB); 
 buttonJP2.add(resetJB); 
 updateJP.add(bookJP,BorderLayout.CENTER); 
 updateJP.add(buttonJP2,BorderLayout.SOUTH); 
 setVisible(true); 
 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 } 
 
 // 将查询表格加入面板 
 private Object[][] getSelect(List<Book> list) { 
 // TODO Auto-generated method stub 
 Object[][] objects = new Object[list.size()][title.length]; 
 for (int i = 0; i < list.size(); i++) { 
  Book book = list.get(i); 
  objects[i][0] = book.getISBN(); 
  objects[i][1] = book.getTypeid();// 图书序列 
  objects[i][2] = book.getBookname();// 图书名称 
  objects[i][3] = book.getAuthor();// 图书作者 
  objects[i][4] = book.getPublish();// 出版社 
  objects[i][5] = book.getPublishdate();// 出版日期 
  objects[i][6] = book.getPublishtime();// 印刷次数 
  objects[i][7] = book.getUnitprice();// 单价 
 } 
 
 return objects; 
 
 } 
 public void actionPerformed(ActionEvent e) { 
 // TODO Auto-generated method stub 
 if(e.getSource()==ISBNJTF){ 
  String isbn=ISBNJTF.getText(); 
  String typename=null; 
  String id=BookDao.selectBookByISBN(isbn).getTypeid(); 
  
  typename=BookTypeDao.selectById(id); 
  System.out.println(typename); 
  booktypeJCB.setSelectedItem(typename); 
  booknameJTF.setText(BookDao.selectBookByISBN(isbn).getBookname()); 
  authorJTF.setText(BookDao.selectBookByISBN(isbn).getAuthor()); 
  publishJTF.setText(BookDao.selectBookByISBN(isbn).getPublish()); 
  publishdateJTF.setText(BookDao.selectBookByISBN(isbn).getPublishdate()+""); 
  printtimeJTF.setText(BookDao.selectBookByISBN(isbn).getPublishtime()+""); 
  unitpriceJTF.setText(BookDao.selectBookByISBN(isbn).getUnitprice()+""); 
  
 } 
 if (e.getSource() == selectJB) {// 按照ISBN编码查找 
  int r = choiceJCB.getSelectedIndex(); 
  if (r == 0) { 
  String name = selectJTF.getText().trim(); 
  // 强制转换为线性表类型 
  List<Book> list = new ArrayList<Book>(); 
  Book book = BookDao.selectBookByISBN(name); 
  if (book == null) { 
   JOptionPane.showMessageDialog(this,"该编码不存在!"); 
  } else { 
   list.add(book); 
   Object[][] data = getSelect(list); 
   jtable = new JTable(data,title); 
   jtable.getColumnModel().getColumn(4).setPreferredWidth(175); 
   jtable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
 
   jscrollPane.setViewportView(jtable); 
 
  } 
  } 
 
  if (r == 1) {// 根据图书名称查询信息 
  String name = selectJTF.getText().toString(); 
  List<Book> list = BookDao.selectBookByName(name); 
  // 判断线性表是否为空 
  if (list == null || list.size() == 0) { 
   JOptionPane.showMessageDialog(this,"该图书不存在!"); 
  } else { 
   Object[][] data = getSelect(list); 
   jtable = new JTable(data,title); 
   tianjia(); 
  } 
  } 
  if (r == 2) {// 根据图书序列查询信息 
  String name = selectJTF.getText().toString(); 
  List<Book> list = BookDao.selectBookByType(name); 
  // 判断线性表是否为空 
  if (list == null || list.size() == 0) { 
   JOptionPane.showMessageDialog(this,title); 
   tianjia(); 
  } 
  } 
  if (r == 3) { // 根据作者进行查找 
  String name = selectJTF.getText().toString(); 
  // 根据作者进行查找 
  List<Book> list = BookDao.selectBookByAuthor(name); 
  // 判断线性表是否为空 
  if (list == null || list.size() == 0) { 
   JOptionPane.showMessageDialog(this,title); 
   tianjia(); 
  } 
  } 
  if (r == 4) {// 根据出版社进行查找 
  String name = selectJTF.getText().toString(); 
  List<Book> list = BookDao.selectBookByPublish(name); 
  if (list == null || list.size() == 0) { 
   JOptionPane.showMessageDialog(this,title); 
   tianjia(); 
 
  } 
  } 
  if(r==5){ 
  List<Book> list =BookDao.selectBook(); 
  } 
 } 
 if (e.getSource() == updateJB) { 
  String ISBN = ISBNJTF.getText().trim(); 
  String typename = ((String) booktypeJCB.getSelectedItem()).trim(); 
  String id = BookTypeDao.selectByTypename(typename); 
  String bookname = booknameJTF.getText(); 
  String author = authorJTF.getText(); 
  String publish = publishJTF.getText(); 
  String publishdate = publishdateJTF.getText(); 
 
  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 
  Date regDate = null; 
  try { 
  regDate = sdf.parse(publishdate); 
  } catch (Exception e2) { 
  e2.printStackTrace(); 
  JOptionPane.showMessageDialog(this,"请输入正确的日期格式!"); 
  } 
  if (regDate == null) 
  return; 
  int publishtime = Integer.parseInt(printtimeJTF.getText()); 
  int unitprice = Integer.parseInt(unitpriceJTF.getText()); 
  // 封装对象 
  Book book = new Book(); 
  book.setISBN(ISBN); 
  book.setTypeid(id); 
  book.setBookname(bookname); 
  book.setAuthor(author); 
  book.setPublish(publish); 
  book.setPublishdate(regDate); 
  book.setPublishtime(publishtime); 
  book.setUnitprice(unitprice); 
  book.setTypename(typename); 
  int result = BookDao.update(book); 
  List<Book> list2 = new ArrayList<Book>(); 
  list2.add(book); 
 
  // System.out.println(list2); 
 
  if (result == 1) { 
  JOptionPane.showMessageDialog(this,"修改成功!"); 
  BookDao bk=new BookDao(); 
  List<Book> list =bk.selectBook(); 
  jtable =new JTable(getSelect(list),title); 
  tianjia(); 
   
  } else { 
  JOptionPane.showMessageDialog(this,"修改失败!"); 
  } 
 } 
 if (e.getSource() == resetJB) { 
  dispose(); 
  new MainWindow(); 
 } 
 if (e.getSource() == exitJB) { 
  dispose(); 
  new MainWindow(); 
 } 
 } 
 
 private void tianjia() { 
 jtable.getColumnModel().getColumn(4).setPreferredWidth(175); 
 jtable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
 
 jscrollPane.setViewportView(jtable); 
 
 } 
 
 public static void main(String[] args) { 
 new BookSelectandModify(); 
 
 } 
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程小技巧。

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