borrowlist.java

图书馆管理系统：该系统的开发主要包括用户登陆

import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.awt.Point;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.BorderLayout;
import javax.swing.table.DefaultTableModel;
import java.util.Vector;
import java.sql.*;
public class borrowList extends JFrame implements ActionListener
{
	public borrowList(){
		setTitle("借阅情况检索列表");
		setSize(200,200);
		gl=new GridLayout(1,3,20,20);
		gl2=new GridLayout(1,1,20,20);
		JPanel panel=new JPanel();
		JPanel panel2=new JPanel();
		panel.setLayout(gl);
		panel2.setLayout(gl2);
		readeridlbl=new JLabel("读者id");
		readertex=new JTextField("");
		bookidlbl=new JLabel("书id");
		booktex=new JTextField("");
		selectbtn=new JButton("查询");
		model=new DefaultTableModel();
		messagetab=new JTable(model);
		model.addColumn("读者ID");
		model.addColumn("书本ID");
		model.addColumn("借阅时间");
		model.addColumn("到期时间");
		model.addColumn("归还时间");
		model.addColumn("状态");
		model.addColumn("续借次数");
		sp=new JScrollPane(messagetab);
		panel.add(bookidlbl);
		panel.add(booktex);
		panel.add(readeridlbl);
		panel.add(readertex);
		panel.add(selectbtn);
		panel2.add(sp);
		selectbtn.addActionListener(this);
		getContentPane().add(panel,BorderLayout.CENTER);
		getContentPane().add(panel2,BorderLayout.SOUTH);
		sql=("select * from 书籍借阅表");
		for(int n=model.getRowCount()-1;n>=0;n--)
		{
			model.removeRow(n);
		}
		try
		{						
			rs=db.getResult(sql);
			rs.beforeFirst();
			while(rs.next()){	
				Vector tempvector=new Vector(1,1);
				tempvector.add(rs.getString(1));
				tempvector.add(rs.getString(2));
				tempvector.add(rs.getString(3));
				tempvector.add(rs.getString(4));
				tempvector.add(rs.getString(5));
				tempvector.add(rs.getString(6));
				tempvector.add(rs.getString(7));
				model.addRow(tempvector);
			}
		}catch(SQLException e)
		{
			System.out.println(e);
		}
	}
	public void actionPerformed(ActionEvent e)
	{
		boolean isFirst=true;
		sql="select * from 书籍借阅表";
		for(int n=model.getRowCount()-1;n>=0;n--)
		{
			model.removeRow(n);
		}
		String reader=readertex.getText().trim();
		String book=booktex.getText().trim();
		if(book.equals("")&reader.equals(""))
		{
			JOptionPane.showMessageDialog(null,"最少输入一个查找项目");
			return;
		}
		if(!book.equals(""))
		{
			Long intbookid=new Long(book);
			sql=sql+" where 书本ID='"+intbookid+"'";
			isFirst=false;
		}
		if(!reader.equals(""))
		{
			Long intuserid=new Long(reader);
			if(isFirst)
			{
				
				sql=sql+" where 读者ID='"+intuserid+"'";
			}
			else
			{
				sql=sql+" and 读者ID='"+intuserid+"'";
			}
		}
			rs=db.getResult(sql);
			boolean isexist=false;
				try
				{
					isexist=rs.first();		
				}
				catch(SQLException w)
				{
					System.out.println(w);
				}
				if(!isexist)
				{
					JOptionPane.showMessageDialog(null,"没有相关资料");
					readertex.setText("");
					booktex.setText("");
					return;
				}
				try
				{
					rs.beforeFirst();
					while(rs.next()){	
					Vector tempvector=new Vector(1,1);
					tempvector.add(rs.getString(1));
					tempvector.add(rs.getString(2));
					tempvector.add(rs.getString(3));
					tempvector.add(rs.getString(4));
					tempvector.add(rs.getString(5));
					tempvector.add(rs.getString(6));
					tempvector.add(rs.getString(7));
					model.addRow(tempvector);
					}
				  
				} 
				catch(SQLException e2)
				{
					System.out.println(e2);
				}
			}

	private JLabel readeridlbl;
	private JLabel bookidlbl;
	private JTextField readertex;
	private JTextField booktex;
	private JButton selectbtn;
	private JTable messagetab;
	private JScrollPane sp;
	private GridLayout gl;
	private GridLayout gl2;
	private DBManager db=new DBManager();
	private ResultSet rs;
	private String sql;
	private DefaultTableModel model;
	
}