booklist.java

JAVA实现的图书管理系统

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
import javax.swing.table.*;
import java.util.Vector;
public class BookList extends JFrame implements ActionListener
{
	DataBaseManager db=new DataBaseManager();
	ResultSet rs;
	Container c;
	JPanel panel1,panel2,panel3;
	JLabel BookNameLabel,AuthorLabel,PressLabel;
	JTextField BookNameTextField,AuthorTextField,
	           PressTextField;
	JButton SearchBtn,ExitBtn;
	JTable table=null;
	DefaultTableModel defaultModel=null;
	public BookList()
	{
		super("书籍信息一览！");
		c=getContentPane();
		c.setLayout(new BorderLayout());
		BookNameLabel=new JLabel("名称",JLabel.CENTER);
		AuthorLabel=new JLabel("作者",JLabel.CENTER);
		PressLabel=new JLabel("出版社",JLabel.CENTER);
		BookNameTextField=new JTextField(15);
		AuthorTextField=new JTextField(15);
		PressTextField=new JTextField(15);
		SearchBtn=new JButton("查询");
		SearchBtn.addActionListener(this);
		ExitBtn=new JButton("退出");
		ExitBtn.addActionListener(this);
		panel1=new JPanel();
		panel3=new JPanel();
		panel1.add(BookNameLabel);
		panel1.add(BookNameTextField);
		panel1.add(AuthorLabel);
		panel1.add(AuthorTextField);
		panel3.add(PressLabel);
		panel3.add(PressTextField);
		panel3.add(SearchBtn);
		panel3.add(ExitBtn);
		String[] name={"书名","出版社","作者","地址","出版日期","定价","评论"};
		String[][] data=new String[0][0];
		defaultModel=new DefaultTableModel(data,name);
		table=new JTable(defaultModel);
		table.setPreferredScrollableViewportSize(new Dimension(400,80));
		JScrollPane s=new JScrollPane(table);
		panel2=new JPanel();
		panel2.add(s);
		c.add(panel1,BorderLayout.NORTH);
		c.add(panel3,BorderLayout.CENTER);
		c.add(panel2,BorderLayout.SOUTH);
	}
	public void actionPerformed(ActionEvent e)
	{
		if(e.getSource()==SearchBtn)
		{
		String strSQL="select bookName,press,author,address,pressDate,price,com from books";
		String strSql=null;
		if(BookNameTextField.getText().trim().equals("")&&
		   AuthorTextField.getText().trim().equals("")&&
		   PressTextField.getText().trim().equals(""))
		{
			strSql=strSQL;
		}
		else if(BookNameTextField.getText().trim().equals("")&&
		        AuthorTextField.getText().trim().equals(""))
		        {
		        	strSql=strSQL+" where press='"+PressTextField.getText().trim()+"'";
		        }
		else if(BookNameTextField.getText().trim().equals("")&&
		        PressTextField.getText().trim().equals(""))
		        {
		        	strSql=strSQL+" where author='"+AuthorTextField.getText().trim()+"'";
		        }
	        else if(AuthorTextField.getText().trim().equals("")&&
		        PressTextField.getText().trim().equals(""))
		        {
		        	strSql=strSQL+" where bookName='"+BookNameTextField.getText().trim()+"'";
		        }
		else if(BookNameTextField.getText().trim().equals(""))
		       {
		       	        strSql=strSQL+" where author='"+AuthorTextField.getText().trim()+
		       	        "'and press='"+PressTextField.getText().trim()+"'";
		       }
		else if(AuthorTextField.getText().trim().equals(""))
		       {
		       	        strSql=strSQL+" where bookName='"+BookNameTextField.getText().trim()+
		       	        "'and press='"+PressTextField.getText().trim()+"'";
		       }
		 else if(PressTextField.getText().trim().equals(""))
		       {
		       	        strSql=strSQL+" where bookname='"+BookNameTextField.getText().trim()+
		       	        "'and author='"+AuthorTextField.getText().trim()+"'";
		       }
		 else
		 {
		 	strSql=strSQL+" where bookname='"+BookNameTextField.getText().trim()+
		       	        "'and author='"+AuthorTextField.getText().trim()+"'and press='"+
		       	        PressTextField.getText().trim()+"'";
		}
		try
		{
	        //首先要删除table中的数据先：
	        int rowCount=defaultModel.getRowCount()-1;//取得table中的数据行；
	        int j=rowCount;
	        for(int i=0;i<=rowCount;i++)
	        {
	        	defaultModel.removeRow(j);//删除rowCount行的数据；
	        	defaultModel.setRowCount(j);//重新设置行数；
	        	j=j-1;
	        }
		rs=db.getResult(strSql);
		while(rs.next())
		{
			Vector data=new Vector();
			data.addElement(rs.getString(1));
			data.addElement(rs.getString(2));
			data.addElement(rs.getString(3));
			data.addElement(rs.getString(4));
			data.addElement(rs.getString(5));
			data.addElement(rs.getString(6));
			data.addElement(rs.getString(7));
			defaultModel.addRow(data);
		}
		table.revalidate();
	}
	catch(SQLException sqle)
		{
			System.out.println(sqle.toString());
		}
	catch(Exception ex)
		{
			System.out.println(ex.toString());
		}
	}
	else if(e.getSource()==ExitBtn)
	{
		db.closeConnection();
		this.dispose();
	}
}
}