b_rborrow.java

图书借阅管理 ,应用于小型图书借阅场所,用java语言编写

import java.awt.*;
import java.awt.event.*;
import javax.swing.JOptionPane;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Date;
class borrow extends Frame implements ActionListener
{
	private static final long serialVersionUID = 1L;
	Button button1,button2,button3,button4;
	Label label1,label2,label3,label4,label5;
	TextField text1,text2,text3,text4;
	TextArea area;
	borrow(String s)
	{
		super(s);
		setVisible(true);
		setBounds(300,150,700,450);
		setBackground(Color.cyan);
		setResizable(false);
		Font f=new Font("",Font.LAYOUT_LEFT_TO_RIGHT,20);
		Font g=new Font("",Font.BOLD,20);
		Font k=new Font("",Font.PLAIN,15);
		button1=new Button("借阅");
		button1.setFont(k);	
		button1.addActionListener(this);
		button2=new Button("归还");	
		button2.setFont(k);	
		button2.addActionListener(this);
		button3=new Button("查询");	
		button3.setFont(k);	
		button3.addActionListener(this);
		label1=new Label("ISBN"); 	
		label1.setFont(f);	
		label1.setBounds(80,80,100,30);
		label2=new Label("读者编号");
		label2.setFont(f);	
		label2.setBounds(80,120,100,30);
		label3=new Label("读者姓名");
		label3.setFont(f);	
		label3.setBounds(80,160,100,30);
		label4=new Label("图书名称");
		label4.setFont(f);	
		label4.setBounds(80,200,100,30);
		text1=new TextField(20);	
		text1.setFont(f);  
		text1.setBounds(190,80,150,30);
		text1.setBackground(Color.lightGray);
		text2=new TextField(20);	
		text2.setFont(f);	
		text2.setBounds(190,120,150,30);
		text2.setBackground(Color.lightGray);
		text3=new TextField(20);	
		text3.setFont(f);	
		text3.setBounds(190,160,150,30);
		text3.setBackground(Color.lightGray);
		text4=new TextField(20);	
		text4.setFont(f);	
		text4.setBounds(190,200,150,30);
		text4.setBackground(Color.lightGray);
		area=new TextArea(20,10);	
		area.setFont(k);    
		area.setEditable(false); 	
		button1.setBounds(170,300,100,30);	
		button1.setForeground(Color.blue);
		button2.setBounds(300,300,100,30);	
		button2.setForeground(Color.blue);
		button3.setBounds(430,300,100,30);	
		button3.setForeground(Color.blue);
		area.setBounds(360,80,250,150);
		add(area);
		add(label1);
		add(label2);
		add(label3);
		add(label4);
		add(text1);
		add(text2);
		add(text3);
		add(text4);
		add(button1); 
		add(button2);
		add(button3);
		label5=new Label("说明");
		label5.setBounds(0,0,50,30);
		label5.setBackground(Color.RED);
		label5.setForeground(Color.red);
		add(label5);
		addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				dispose();
			}
		});
	}
	public void actionPerformed(ActionEvent e)
	{
		Date date=new Date();
		SimpleDateFormat n=new SimpleDateFormat("MM-dd");
		area.setText(n.format(date));
		Connection con;
		 Statement sql;
		 ResultSet rs;
		 String insertStr,delStr,searchStr;
		if(e.getSource()==button1)//添加信息
		{
			if((!text1.getText().equals(""))&&(!text2.getText().equals(""))&&(!text3.getText().equals(""))&&(!text4.getText().equals("")))
			{ 
				 try 
				 {
					Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
				 }
				 catch(ClassNotFoundException e1)
				 {
					 JOptionPane.showMessageDialog(this, "没有建立连接","警告",JOptionPane.WARNING_MESSAGE);
					 area.setText("没有建立连接\n");
				 }
				 try
				 {
				 	con=DriverManager.getConnection("jdbc:odbc:bcfshuju","","");
				 	sql=con.createStatement();
				 	insertStr="select num from book where ISBN='"+text1.getText()+"';";
				 	rs=sql.executeQuery(insertStr);
				 	int number=rs.getInt("num");
				 	if(number==0)
				 	{
				 		JOptionPane.showConfirmDialog(this, "借阅失败,该书已借出!","确认对话框",JOptionPane.PLAIN_MESSAGE);
				 	}
				 	else
				 	{
				 		insertStr="insert into borrow values ('"+text1.getText()+"','"+text2.getText()+"','"+text3.getText()+"','"+text4.getText()+"','"+n.format(date)+",'"+n.format(date)+"+"+30+");";
				 		sql.executeUpdate(insertStr);
				 		sql.executeUpdate("update book set num=num-1;");
				 	}
				 	con.close();
				 }
				 catch (SQLException e2)
				 {
					 area.setText("借阅失败!\n");
					 JOptionPane.showConfirmDialog(this, "借阅失败!","确认对话框",JOptionPane.PLAIN_MESSAGE);
				 }
			}	
			else if((text1.getText().equals(""))||(!text2.getText().equals(""))||(!text3.getText().equals(""))||(!text4.getText().equals("")))
			{
				JOptionPane.showMessageDialog(this,"文本框中不能为空值！","警告",JOptionPane.WARNING_MESSAGE);
			}
		}
		else if(e.getSource()==button2)//归还图书
		{
			if((!text1.getText().equals(""))&&(!text2.getText().equals(""))&&(!text3.getText().equals(""))&&(!text4.getText().equals("")))
			{
				try 
				{
					Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
				}
				catch(ClassNotFoundException e1)
				{
					JOptionPane.showMessageDialog(this, "没有建立连接","警告",JOptionPane.WARNING_MESSAGE);
					area.setText("没有建立连接\n");
				}
				try
				{
					con=DriverManager.getConnection("jdbc:odbc:bcfshuju","","");
					sql=con.createStatement();
					delStr="delete borrow where ISBN='"+text1.getText()+"'and no='"+text2.getText()+"'and rName='"+text3.getText()+"'and bName='"+text4.getText()+"';";
					sql.executeUpdate(delStr);
					sql.executeUpdate("update book set num=num+1;");
					area.append("图书归还成功");
					con.close();
				}
				catch (SQLException e2)
				{
					area.setText("归还失败!\n");
					JOptionPane.showConfirmDialog(this, "归还失败!","确认对话框",JOptionPane.PLAIN_MESSAGE);
				}
			}	
			else if((text1.getText().equals(""))||(!text2.getText().equals(""))||(!text3.getText().equals(""))||(!text4.getText().equals("")))
			{
				JOptionPane.showMessageDialog(this,"文本框中不能为空值！","警告",JOptionPane.WARNING_MESSAGE);
			}
		}
		else if(e.getSource()==button3)//查找借阅信息 
		{
			if((!text1.getText().equals(""))&&(!text2.getText().equals("")))
			{
				try 
				{
					Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
				}
				catch(ClassNotFoundException e1)
				{
					JOptionPane.showMessageDialog(this, "没有建立连接","警告",JOptionPane.WARNING_MESSAGE);
					area.setText("没有建立连接\n");
				}
				try
				{
					con=DriverManager.getConnection("jdbc:odbc:bcfshuju","","");
					sql=con.createStatement();
					searchStr="select *from borrow where ISBN='"+text1.getText()+"'and no='"+text2.getText()+"';";
					rs=sql.executeQuery(searchStr);
					con.close();
				}
				catch (SQLException e2)
				{
					area.setText("查询失败!\n");
					JOptionPane.showConfirmDialog(this, "查询失败!","确认对话框",JOptionPane.PLAIN_MESSAGE);
				}
			}	
			else if((text1.getText().equals(""))||(!text2.getText().equals("")))
			{
				JOptionPane.showMessageDialog(this,"文本框中不能为空值！","警告",JOptionPane.WARNING_MESSAGE);
			}
		}
		text1.setText(null);
		text2.setText(null);
		text3.setText(null);
		text4.setText(null);
		area.setText(null);
	}
}
/*public class b_rBorrow 
{
	public static void main(String[] args) 
	{
		new borrow("借阅信息管理");
	}
}*/