本文的目的就是通过图书管理系统掌握数据库编程技术，能正确连接数据库，能对数据库中信息进行查询、插入、删除、修改。
内容：在数据库中创建一张书目信息表，包括书名、作者、出版社、出版日期、书号、价格字段。设计一个GUI界面进行书目管理。在该界面上有四个选项卡，分别是查询、插入、删除、修改。点击查询选项卡，出现的界面上有书名、作者、出版社、书号四个文本框，一个按钮和一个只读文本区。文本框内容可以为空，输入相应的查询信息后（例如根据书名查询可以仅输入书名），点击界面上的“查询”按钮，可以在界面下方的文本区中显示出符合条件的书目详细信息。点击插入选项卡，出现的界面上有书名、作者、出版社、出版日期、书号、价格文本框，一个按钮。在文本框中输入信息后，点击“插入”按钮，该书目信息插入数据库表中。点击删除选项卡，出现的界面上有书名文本框和一个按钮，输入书名后点击“删除”按钮，该书目信息从数据库表中删除。点击修改选项卡，出现的界面上有书名、作者、出版社、出版日期、书号、价格文本框，一个按钮。输入的书名必须是已存在的，否则会弹出消息框显示出错信息。输入信息后，点击“修改”按钮，数据库表中的相应书目信息被修改为新值。
源码：
BookInfo.java
* 项目名称:图书管理系统 * 版本: 1.0 * 创建者: 张俊强 * 创建时间:2016/5/26 * */ package librarySystem; import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.sql.*; @SuppressWarnings("serial") public class BookInfo extends JFrame implements ActionListener{ //主角面上的控件 private JLabel inputLabel; private JTextField inputText; private JButton searchBut; private JTable bookTable; private JScrollPane bookScroll; private JButton addBut; private JButton modifyBut; private JButton deleteBut; private JButton refreshBut; private BookTableModel bookTableModel; public static void main(String[] args) throws SQLException { // TODO Auto-generated method stub BookInfo bookInfo=new BookInfo(); bookInfo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); bookInfo.setBounds(350, 150, 600, 400); bookInfo.setVisible(true); // bookInfo.importSQL();//导出数据 bookInfo.setMinWindowLayout();//设置数据 } public BookInfo() throws SQLException{ //创建主界面上的控件 inputLabel=new JLabel("请输入书名:"); inputText=new JTextField(10); searchBut=new JButton("查询"); bookTableModel=new BookTableModel(); bookTable=new JTable(bookTableModel); bookScroll=new JScrollPane(bookTable); addBut=new JButton("添加"); modifyBut=new JButton("修改"); deleteBut=new JButton("删除"); refreshBut=new JButton("刷新"); searchBut.addActionListener(this); addBut.addActionListener(this); refreshBut.addActionListener(this); modifyBut.addActionListener(this); deleteBut.addActionListener(this); } void setMinWindowLayout(){ //主界面布局 Container con1=new Container(); con1.setLayout(new FlowLayout()); con1.add(inputLabel); con1.add(inputText); con1.add(searchBut); con1.add(refreshBut); Container con2=new Container(); con2.setLayout(new FlowLayout()); con2.add(addBut); con2.add(modifyBut); con2.add(deleteBut); this.setLayout(new BorderLayout()); this.add(con1,BorderLayout.NORTH); this.add(bookScroll,BorderLayout.CENTER); this.add(con2,BorderLayout.SOUTH); this.validate(); } @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub if(e.getSource()==searchBut){ if(!this.inputText.getText().equals("")){ String bookName=this.inputText.getText(); String sql="SELECT * FROM book_info WHERE book_name ='"+bookName+"'"; try { bookTableModel=new BookTableModel(sql); bookTable.setModel(bookTableModel); } catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } }else{ JOptionPane.showMessageDialog(this,"输入不能为空", "提示",JOptionPane.PLAIN_MESSAGE); } } else if(e.getSource()==addBut){ @SuppressWarnings("unused") AddBookDialog addWin=new AddBookDialog(this,"添加图书",true); this.refreshTable(); } else if(e.getSource()==refreshBut){ this.refreshTable(); } else if(e.getSource()==deleteBut){ int rowNum=bookTable.getSelectedRow(); if(rowNum<0||rowNum>bookTable.getRowCount()){ JOptionPane.showMessageDialog(this,"未选中", "提示",JOptionPane.PLAIN_MESSAGE); } else{ //System.out.print(bookName); int n = JOptionPane.showConfirmDialog(null, "确认删除吗?", "确认删除框", JOptionPane.YES_NO_OPTION); if (n == JOptionPane.YES_OPTION) { String bookNum=(String) bookTable.getValueAt(rowNum, 0); String sql="DELETE FROM book_info WHERE book_num= '"+bookNum+"'"; bookTableModel.deleteBook(sql); this.refreshTable(); JOptionPane.showMessageDialog(this,"删除成功", "提示",JOptionPane.PLAIN_MESSAGE); } else if (n == JOptionPane.NO_OPTION) { return; } } } else if(e.getSource()==modifyBut){ bookTable.setModel(bookTableModel); int rowNum=bookTable.getSelectedRow(); if(rowNum<0||rowNum>bookTable.getRowCount()){ JOptionPane.showMessageDialog(this,"未选中", "提示",JOptionPane.PLAIN_MESSAGE); } else{ @SuppressWarnings("unused") ModifyBook modifyWin=new ModifyBook(this,"修改信息",true,bookTableModel,rowNum); this.refreshTable(); } } } public void refreshTable(){ BookTableModel searchBook; try { searchBook = new BookTableModel("SELECT * FROM book_info"); bookTable.setModel(searchBook); bookTableModel=searchBook; } catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } } BookTableModel.java
package librarySystem; import java.sql.*; import java.util.*; /* * 图书表模型 * */ import javax.swing.table.*; @SuppressWarnings("serial") public class BookTableModel extends AbstractTableModel{ //表的元素 private Vector<Vector<String>> rowData; private Vector<String> colName; // 数据库 private PreparedStatement stmt; private ResultSet result; public BookTableModel(String sql) throws SQLException{ this.initData(sql); } public BookTableModel() throws SQLException{ this.initData("SELECT * FROM book_info"); } public void initData(String sql) throws SQLException{ setRowData(new Vector<Vector<String>>()); setColName(new Vector<String>()); getColName().add("书号"); getColName().add("书名"); getColName().add("作者"); getColName().add("出版社"); getColName().add("出版时间"); getColName().add("价格"); /* * 数据库的导入 * */ try { Class.forName("com.mysql.jdbc.Driver"); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } String url= "jdbc:mysql://localhost:3306/device"; String user="root"; String password="zjq1314520"; Connection con=DriverManager.getConnection(url,user,password); stmt = con.prepareStatement(sql); result=stmt.executeQuery(); importSQL(); } void importSQL() throws SQLException{ // TODO Auto-generated method stub @SuppressWarnings("unused") boolean signNull=true; while(result.next()){ Vector<String> item=new Vector<String>(); for(int i=1;i<7;i++){ item.add(result.getString(i)); } getRowData().add(item); signNull=false; } result.close(); } @Override public int getColumnCount() {//得到列数 // TODO Auto-generated method stub return this.colName.size(); } @Override public int getRowCount() {//得到行数 // TODO Auto-generated method stub return this.rowData.size(); } @Override public Object getValueAt(int row, int col) {//得到某行某列的数据 // TODO Auto-generated method stub return (this.rowData.get(row)).get(col); } @Override public String getColumnName(int column) { // TODO Auto-generated method stub return this.colName.get(column); } public Vector<Vector<String>> getRowData() { return rowData; } public void setRowData(Vector<Vector<String>> rowData) { this.rowData = rowData; } public Vector<String> getColName() { return colName; } public void setColName(Vector<String> colName) { this.colName = colName; } public void addBook(String sql){ try { stmt.executeUpdate(sql); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } // initData("SELECT * FROM book_info"); } public void deleteBook(String sql){ try { stmt.executeUpdate(sql); } catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } } AddBookDialog.java
package librarySystem; import java.awt.*; import java.awt.event.*; import java.sql.SQLException; import javax.swing.*; @SuppressWarnings("serial") public class AddBookDialog extends JDialog implements ActionListener{ private JLabel bookNumLabel; private JLabel bookNameLabel; private JLabel bookWriterLabel; private JLabel bookPublishLabel; private JLabel bookPriceLabel; private JLabel bookTimeLabel; private JTextField bookNumText; private JTextField bookNameText; private JTextField bookWriterText; private JTextField bookPublishText; private JTextField bookPriceText; private JTextField bookTimeText; private JButton submitBut; private JButton cancelBut; public AddBookDialog(Frame owner,String title,boolean model){ //父窗口,窗口名,是否是模式窗口 super(owner,title,model); bookNumLabel=new JLabel("书 号:"); bookNameLabel=new JLabel("书 名:"); bookWriterLabel=new JLabel("作 者:"); bookPublishLabel=new JLabel("出版社:"); bookPriceLabel=new JLabel("价 格:"); bookTimeLabel=new JLabel("出版时间:"); bookNumText=new JTextField(10); bookNameText=new JTextField(10); bookWriterText=new JTextField(10); bookPublishText=new JTextField(10); bookPriceText=new JTextField(10); bookTimeText=new JTextField(9); submitBut=new JButton("确认"); cancelBut=new JButton("取消"); submitBut.addActionListener(this); cancelBut.addActionListener(this); this.setBounds(350,150,400,260); this.setResizable(false); this.setLayout(new BorderLayout()); initLayout(); } public void initLayout(){ Container[] con1=new Container[6]; for(int i=0;i<6;i++) con1[i]=new Container(); con1[0].setLayout(new FlowLayout()); con1[0].add(bookNumLabel); con1[0].add(bookNumText); con1[1].setLayout(new FlowLayout()); con1[1].add(bookNameLabel); con1[1].add(bookNameText); con1[2].setLayout(new FlowLayout()); con1[2].add(bookWriterLabel); con1[2].add(bookWriterText); con1[3].setLayout(new FlowLayout()); con1[3].add(bookPublishLabel); con1[3].add(bookPublishText); con1[4].setLayout(new FlowLayout()); con1[4].add(bookPriceLabel); con1[4].add(bookPriceText); con1[5].setLayout(new FlowLayout()); con1[5].add(bookTimeLabel); con1[5].add(bookTimeText); Container con2=new Container(); con2.setLayout(new BorderLayout()); con2.add(con1[0],BorderLayout.NORTH); con2.add(con1[1],BorderLayout.CENTER); con2.add(con1[2],BorderLayout.SOUTH); Container con3=new Container(); con3.setLayout(new BorderLayout()); con3.add(con1[3],BorderLayout.NORTH); con3.add(con1[4],BorderLayout.CENTER); con3.add(con1[5],BorderLayout.SOUTH); Container con4=new Container(); con4.setLayout(new FlowLayout()); con4.add(submitBut); con4.add(cancelBut); Container con5=new Container(); con5.setLayout(new BorderLayout()); con5.add(con2,BorderLayout.NORTH); con5.add(con3,BorderLayout.CENTER); con5.add(con4,BorderLayout.SOUTH); this.add(con5,BorderLayout.CENTER); this.validate(); this.setVisible(true); } @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub if(e.getSource()==submitBut){ if(bookNumText.getText().equals("")||bookNameText.getText().equals("")|| bookWriterText.getText().equals("")||bookPublishText.getText().equals("")|| bookPriceText.getText().equals("")||bookTimeText.getText().equals("")){ //System.out.println("输入失败"); JOptionPane.showMessageDialog(this,"输入不能有空", "提示",JOptionPane.PLAIN_MESSAGE); } else{ //System.out.println("输入成功"); String sql="insert into " + "book_info(book_num,book_name,book_writer,publish_house,book_price,publish_time)" + "values('"+bookNumText.getText()+"','"+bookNameText.getText()+"','"+bookWriterText.getText()+"','"+bookPublishText.getText()+"','"+bookPriceText.getText()+"','"+bookTimeText.getText()+"')"; try { BookTableModel book=new BookTableModel(); book.addBook(sql); } catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } JOptionPane.showMessageDialog(this,"添加成功", "提示",JOptionPane.PLAIN_MESSAGE); this.setVisible(false); } } if(e.getSource()==cancelBut){ this.setVisible(false); } } } ModifyBook.java
package librarySystem; import java.awt.*; import java.awt.event.*; import java.sql.SQLException; import javax.swing.*; @SuppressWarnings("serial") public class ModifyBook extends JDialog implements ActionListener{ private JLabel bookNumLabel; private JLabel bookNameLabel; private JLabel bookWriterLabel; private JLabel bookPublishLabel; private JLabel bookPriceLabel; private JLabel bookTimeLabel; private JTextField bookNumText; private JTextField bookNameText; private JTextField bookWriterText; private JTextField bookPublishText; private JTextField bookPriceText; private JTextField bookTimeText; private JButton submitBut; private JButton cancelBut; private BookTableModel bookModel; private int rowNum; public ModifyBook(Frame owner,String title,boolean type,BookTableModel model,int row){ super(owner,title,type); bookModel=model; rowNum=row; bookNumLabel=new JLabel("书 号:"); bookNameLabel=new JLabel("书 名:"); bookWriterLabel=new JLabel("作 者:"); bookPublishLabel=new JLabel("出版社:"); bookPriceLabel=new JLabel("价 格:"); bookTimeLabel=new JLabel("出版时间:"); bookNumText=new JTextField(10); bookNameText=new JTextField(10); bookWriterText=new JTextField(10); bookPublishText=new JTextField(10); bookPriceText=new JTextField(10); bookTimeText=new JTextField(9); submitBut=new JButton("确认修改"); cancelBut=new JButton("取消"); submitBut.addActionListener(this); cancelBut.addActionListener(this); this.setBounds(350,150,400,260); this.setResizable(false); this.setLayout(new BorderLayout()); this.setValue(); this.initLayout(); } public void initLayout(){ Container[] con1=new Container[6]; for(int i=0;i<6;i++) con1[i]=new Container(); con1[0].setLayout(new FlowLayout()); con1[0].add(bookNumLabel); con1[0].add(bookNumText); con1[1].setLayout(new FlowLayout()); con1[1].add(bookNameLabel); con1[1].add(bookNameText); con1[2].setLayout(new FlowLayout()); con1[2].add(bookWriterLabel); con1[2].add(bookWriterText); con1[3].setLayout(new FlowLayout()); con1[3].add(bookPublishLabel); con1[3].add(bookPublishText); con1[4].setLayout(new FlowLayout()); con1[4].add(bookPriceLabel); con1[4].add(bookPriceText); con1[5].setLayout(new FlowLayout()); con1[5].add(bookTimeLabel); con1[5].add(bookTimeText); Container con2=new Container(); con2.setLayout(new BorderLayout()); con2.add(con1[0],BorderLayout.NORTH); con2.add(con1[1],BorderLayout.CENTER); con2.add(con1[2],BorderLayout.SOUTH); Container con3=new Container(); con3.setLayout(new BorderLayout()); con3.add(con1[3],BorderLayout.NORTH); con3.add(con1[4],BorderLayout.CENTER); con3.add(con1[5],BorderLayout.SOUTH); Container con4=new Container(); con4.setLayout(new FlowLayout()); con4.add(submitBut); con4.add(cancelBut); Container con5=new Container(); con5.setLayout(new BorderLayout()); con5.add(con2,BorderLayout.NORTH); con5.add(con3,BorderLayout.CENTER); con5.add(con4,BorderLayout.SOUTH); this.add(con5,BorderLayout.CENTER); this.validate(); this.setVisible(true); } public void setValue(){ this.bookNumText.setText((String) bookModel.getValueAt(rowNum, 0)); this.bookNumText.setEditable(false); this.bookNameText.setText((String) bookModel.getValueAt(rowNum, 1)); this.bookWriterText.setText((String) bookModel.getValueAt(rowNum, 2)); this.bookPublishText.setText((String) bookModel.getValueAt(rowNum, 3)); this.bookTimeText.setText((String) bookModel.getValueAt(rowNum, 4)); this.bookPriceText.setText((String) bookModel.getValueAt(rowNum, 5)); this.validate(); } @Override public void actionPerformed(ActionEvent e) { // System.out.println(bookPriceText.getText()); // TODO Auto-generated method stub if(e.getSource()==submitBut){ if(bookNumText.getText().equals("")||bookNameText.getText().equals("")|| bookWriterText.getText().equals("")||bookPublishText.getText().equals("")|| bookPriceText.getText().equals("")||bookTimeText.getText().equals("")){ //System.out.println("输入失败"); JOptionPane.showMessageDialog(this,"修改不能有空", "提示",JOptionPane.PLAIN_MESSAGE); } else{ int n = JOptionPane.showConfirmDialog(null, "确认修改吗?", "确认修改框", JOptionPane.YES_NO_OPTION); if (n == JOptionPane.YES_OPTION) { String sql="UPDATE book_info SET book_name ='"+bookNameText.getText()+"', book_writer= '"+bookWriterText.getText()+"',publish_house='"+bookPublishText.getText()+"',book_price='"+bookPriceText.getText()+"',publish_time='"+bookTimeText.getText()+"' WHERE book_num = '"+bookNumText.getText()+"' "; try { BookTableModel book=new BookTableModel(); book.addBook(sql); } catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } JOptionPane.showMessageDialog(this,"修改成功", "提示",JOptionPane.PLAIN_MESSAGE); this.setVisible(false); } else if (n == JOptionPane.NO_OPTION) { return; } } } if(e.getSource()==cancelBut){ this.setVisible(false); } } } 程序运行结果：
主界面：
查询界面：
添加图书界面：
修改界面：
删除操作：
数据库界面：
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