图书管理系统。

一.项目设计到的知识

1.MVC设计模式思想（分包）

>项目分包

用java实现图书管理系统。
运用这种设计模式的优点：
MVC 是一种程序开发设计模式,它实现了显示模块与功能模块的分离。提高了程序的可维护性、可移植性、可扩展性与可重用性，降低了程序的开发难度。它主要分模型、视图、控制器三层。

>MVC简单介绍

M model业务模型(pojo/domain/bean)与现实中实体类联系
V views视图层(views)
图形化界面(gui)
C controller
用户与软件交互，处理信息
dao层(数据持久化)
提供数据
service层(处理逻辑)
处理数据
controller(javaweb里边的内容，servlet)

较详细的图示：
用java实现图书管理系统。

2.GUI（图形化界面）

其中的GUI代码案例：

package org.vector.view;

import java.awt.Cursor;

import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.ArrayList;

import java.util.List;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

import org.vector.bean.Book;

import org.vector.bean.Booktype;

import org.vector.bean.Borrowbook;

import org.vector.bean.Reader;

import org.vector.bean.Readertype;

import org.vector.bean.Users;

import org.vector.serviceImpl.UsersServiceImpl;

public class BookLogin extends JFrame{

	public BookLogin() {

		buliding();

		addListeners();

	}

	public static String name1;

	public static List<Users> list = new ArrayList<Users>();

	public static List<Reader> list1 = new ArrayList<Reader>();

	public static List<Book> list2 = new ArrayList<Book>();

	public static List<Readertype> list3 = new ArrayList<Readertype>();

	public static List<Booktype> list4 = new ArrayList<Booktype>();

	public static List<Borrowbook> list5 = new ArrayList<Borrowbook>();

	private JButton login,reset,register;

	private JLabel name,password,label;

	private JTextField name_Text;

	private JPasswordField password_Text;

	private void buliding() {

		// TODO Auto-generated method stub

		setLayout(null);

		background();

		setTitle("图书借阅系统登录界面");

		Font font = new Font("圆体", Font.BOLD, 50);

		label = new JLabel("图书借阅系统");

		label.setFont(font);

		label.setBounds(40, 20, 400, 50);

		add(label);

		name = new JLabel("用户名:");

		name.setBounds(45, 100, 120, 30);

		add(name);

		name_Text = new JTextField(20);

		name_Text.setBounds(100, 100, 200, 30);

		add(name_Text);

		password = new JLabel("密    码:");

		password.setBounds(45, 150, 120, 30);

		add(password);

		password_Text = new JPasswordField(20);

		password_Text.setBounds(100, 150, 200, 30);

		add(password_Text);

		login = new JButton("登录");

		login.setBounds(50, 200, 100, 35);

		add(login);

		reset = new JButton("重置");

		reset.setBounds(150, 200, 100, 35);

		add(reset);

//		register = new JButton("注册");

//		register.setBounds(250, 200, 100, 35);

//		add(register);

    	setBounds(400,300,400,300);

    	setLocation((2000-getWidth())/2,(1000-getHeight())/2);

    	setResizable(false);

    	setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

    	setVisible(true);

	}

	public void background() {

		setSize(600, 500);

		setLocation(100, 100);

		String path = "Login.jpg";

		ImageIcon background = new ImageIcon(path);

		JLabel label = new JLabel(background);

		label.setBounds(0, 0, this.getWidth(), this.getHeight());

		JPanel imagePanel = (JPanel) this.getContentPane();

		imagePanel.setOpaque(false);

		this.getLayeredPane().add(label, new Integer(Integer.MIN_VALUE));

		setVisible(true);

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	}

	private void addListeners() {

		login.addActionListener(new ActionListener() {

			@Override

			public void actionPerformed(ActionEvent e) {

				// TODO Auto-generated method stub

				login.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));

				int flag = 0;

				String name = name_Text.getText();

				String password = password_Text.getText();

				name1 = name;

				UsersServiceImpl  user = new UsersServiceImpl();

				BookLogin.list.clear();

				BookLogin.list.addAll(user.findUsers());

				for (int i = 0; i < BookLogin.list.size(); i++) {

					if(name.equals(BookLogin.list.get(i).getName())&&password.equals(BookLogin.list.get(i).getPassword())){

						JOptionPane.showMessageDialog(null, "登录成功", "标题", JOptionPane.WARNING_MESSAGE);

						BookLogin.this.dispose();

						new BorrowbookView().setVisible(true);

						flag = 1;

						BookLogin.this.dispose();

						new BorrowbookView().setVisible(true);

						break;

					}

				}

				if(flag == 0) {

					JOptionPane.showMessageDialog(null, "登录失败,该用户不存在", "标题", JOptionPane.WARNING_MESSAGE);

				}

			}

		});

		reset.addActionListener(new ActionListener() {

			@Override

			public void actionPerformed(ActionEvent e) {

				// TODO Auto-generated method stub

				BookLogin.this.dispose();

				new BookLogin().setVisible(true);

			}

		});

//		register.addActionListener(new ActionListener() {

//

//			@Override

//			public void actionPerformed(ActionEvent e) {

//				// TODO Auto-generated method stub

//				BookLogin.this.dispose();

//				new UserAdd().setVisible(true);

//			}

//		});

	}

}

3.JDBC连接MySql数据库

用了c3p0对原生JDBC的封装思想，大大提高了开发者的效率。
c3p0xml配置文件

<?xml version="1.0" encoding="UTF-8"?>

<c3p0-config>

    <!-- c3p0默认配置，下面还可以配置多个数据库 -->

    <default-config>

        <property name="jdbcUrl">jdbc:mysql://localhost:3306/mybook?characterEncoding=UTF8

        </property>

        <property name="driverClass">com.mysql.jdbc.Driver</property>

        <property name="user">root</property>

        <property name="password">password</property>

        <property name="initialPoolSize">6</property>

        <property name="maxPoolSize">10</property>

        <property name="maxIdleTime">10000</property>

    </default-config>

</c3p0-config>