addbookfrm.java

在程序的Borlistbookfrm.java中实现打印功能

import java.util.*;
import java.awt.*;
import java.io.*;
import java.net.*;
import java.sql.*;
import java.awt.event.*;
import javax.swing.*;

import javax.swing.JFrame;

class Addbookfrm extends JFrame implements ActionListener
{
	 
	 JLabel l_msg,l_bookname,l_company,l_author,l_price,l_number,l_wenli,l_id;
	 JTextField t_bookname,t_company,t_author,t_wenli,t_price,t_number,t_id;
	 JButton b_clear,b_add,b_back;
	 JPanel pan1,pan2,pan3,pan4,pan5,pan6,pan7,pan8,pan9,pan0;
	 Choice c_wenli;
	 
	 NetConn sql;
	 Statement sqll,sqlll;
	 ResultSet rs,rs1;
	 
	 String a0,a1,a2,a3,a4,a5,a6,a7;

	 
	 Addbookfrm()
	 {
		 super("添加书籍窗口");
		 l_msg     =new JLabel("添加书籍        ");
		 l_id      =new JLabel("书籍编号：");
		 l_bookname=new JLabel("书籍名称：");
		 l_company =new JLabel("出版发行：");
		 l_author  =new JLabel("书籍作者：");
		 l_wenli   =new JLabel("文理分类：");
		 l_price   =new JLabel("书籍售价：");
		 l_number  =new JLabel("书籍数量：");
		 t_id      =new JTextField("",10);
		 t_bookname=new JTextField("",10);
		 t_company =new JTextField("",10);
		 t_author  =new JTextField("",10);
		 c_wenli   =new Choice();
		 c_wenli.add("文");
		 c_wenli.add("理");
		 t_price   =new JTextField("",10);
		 t_number  =new JTextField("",10);
		 b_clear   =new JButton("清空");
		 b_add     =new JButton("添加");
		 b_back    =new JButton("返回");
		 b_clear.addActionListener(this);
		 b_add.addActionListener(this);
		 b_back.addActionListener(this);
		 pan0=new JPanel();pan1=new JPanel();pan2=new JPanel();pan3=new JPanel();pan4=new JPanel();pan5=new JPanel();pan6=new JPanel();pan7=new JPanel();pan8=new JPanel();pan9=new JPanel();
		 pan1.add(l_msg);pan0.add(l_id);pan0.add(t_id);pan2.add(l_bookname);pan2.add(t_bookname);pan3.add(l_company);pan3.add(t_company);
		 pan4.add(l_author);pan4.add(t_author);pan5.add(l_wenli);pan5.add(c_wenli);pan6.add(l_price);pan6.add(t_price);
		 pan7.add(l_number);pan7.add(t_number);pan9.add(b_add);pan9.add(b_clear);pan9.add(b_back);
		 setLayout(new GridLayout(9,1));
		 add(pan1);add(pan0);add(pan2);add(pan3);add(pan4);add(pan5);add(pan6);add(pan7);add(pan9);
		 
		 sql=new NetConn();
		 
		 //setBounds(350,150,400,500);
		 this.pack();
		 this.setLocation(this.getToolkit().getScreenSize().width/2-this.getWidth()/2,this.getToolkit().getScreenSize().height/2-this.getHeight()/2);
		 		 
	 }
	 public void actionPerformed(ActionEvent ec)
	 {
		 
		 if(ec.getSource()==b_back)
		 {
			 dispose();
		 }
		 
		 else if(ec.getSource()==b_clear)
		 {
			 t_id.setText("");
			 t_bookname.setText("");
			 t_company.setText("");
			 t_author.setText("");
			 t_price.setText("");
			 t_number.setText("");
			 l_msg=new JLabel("添加书籍        ");
		 }
		 
		 else if(ec.getSource()==b_add)
		 {
			 
			 if(t_bookname.getText().equals("")||t_company.getText().equals("")||t_author.getText().equals(""))
			 {
				 l_msg.setText("书名，出版社和作者不能为空！");
				 
			 }
			 else
			 {
	    			try
	    			{
	    			
	    			sqll=sql.connect();
	    			sqlll=sql.connect();
					
					rs=sqll.executeQuery("SELECT * FROM books where id="+"'"+t_id.getText()+"'");
					rs1=sqlll.executeQuery("SELECT * FROM books where bookname="+"'"+t_bookname.getText()+"'");	
					
					if(rs.next()||rs1.next())
					{
						l_msg.setText("该书籍已经存在,添加失败！");
					}				    
				    else
				    {
					 a0="'"+t_id.getText().trim()+"'";
					 a1="'"+t_bookname.getText().trim()+"'";
					 a2="'"+t_company.getText().trim()+"'";
					 a3="'"+t_author.getText().trim()+"'";
					 a4="'"+c_wenli.getSelectedItem().trim()+"'";
					 a5="'"+t_price.getText().trim()+"'";
					 a6="'"+t_number.getText().trim()+"'";
					 l_msg.setText("1");
					 
					 String temp="insert into books  (id, bookname, company, author, price, conun, wenli) VALUES ("+a0+","+a1+","+a2+","+a3+","+a5+","+a6+","+a4+")";
					 sqll.executeUpdate(temp);
					 l_msg.setText("书籍添加成功!");
				    }
				 }
				 catch(SQLException e3)
				 {System.out.println(e3);}
			 }
		 }
	 }
	
}