java图书系统罚款代码 java做一个简单的图书管理的代码

求图书管理系统（java）代码？

java　swing　登陆界面code

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/*

* Login.java

*

* Created on __DATE__, __TIME__

*/

package com.agen.library.window;

import java.awt.Image;

import java.awt.Toolkit;

import javax.swing.JOptionPane;

import javax.swing.UIManager;

import javax.swing.UnsupportedLookAndFeelException;

import com.agen.library.factory.DAOFactory;

import com.agen.library.util.GlobalUser;

import com.agen.library.vo.User;

/**

*

* @author __USER__

*/

public class Login extends javax.swing.JFrame {

/**

*

*/

private static final long serialVersionUID = -2176093732040600809L;

/** Creates new form Login */

public Login() {

super("易云图书管理软件V1.0");

Image ime = Toolkit.getDefaultToolkit().getImage(

getClass().getResource("/images/ico.png"));

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (InstantiationException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IllegalAccessException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (UnsupportedLookAndFeelException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

setIconImage(ime);

initComponents();

setLocationRelativeTo(null);

this.setResizable(false);

}

/**

* This method is called from within the constructor to initialize the form.

* WARNING: Do NOT modify this code. The content of this method is always

* regenerated by the Form Editor.

*/

// GEN-BEGIN:initComponents

// editor-fold defaultstate="collapsed" desc="Generated Code"

private void initComponents() {

jLabel2 = new javax.swing.JLabel();

jLabel3 = new javax.swing.JLabel();

jTextField1 = new javax.swing.JTextField();

jPasswordField1 = new javax.swing.JPasswordField();

jButton1 = new javax.swing.JButton();

jButton2 = new javax.swing.JButton();

jLabel1 = new javax.swing.JLabel();

jMenuBar1 = new javax.swing.JMenuBar();

jMenu1 = new javax.swing.JMenu();

jMenuItem1 = new javax.swing.JMenuItem();

jMenu2 = new javax.swing.JMenu();

jMenuItem2 = new javax.swing.JMenuItem();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

addKeyListener(new java.awt.event.KeyAdapter() {

public void keyPressed(java.awt.event.KeyEvent evt) {

formKeyPressed(evt);

}

public void keyTyped(java.awt.event.KeyEvent evt) {

formKeyTyped(evt);

}

});

jLabel2.setFont(new java.awt.Font("微软雅黑", 0, 14));

jLabel2.setText("\u7528\u6237\u540d\uff1a");

jLabel3.setFont(new java.awt.Font("微软雅黑", 0, 14));

jLabel3.setText("\u5bc6 \u7801\uff1a");

jTextField1.setFont(new java.awt.Font("微软雅黑", 0, 14));

jTextField1.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

jTextField1ActionPerformed(evt);

}

});

jPasswordField1.setFont(new java.awt.Font("微软雅黑", 0, 12));

jPasswordField1.addKeyListener(new java.awt.event.KeyAdapter() {

public void keyTyped(java.awt.event.KeyEvent evt) {

jPasswordField1KeyTyped(evt);

}

});

jButton1.setBackground(new java.awt.Color(223, 216, 216));

jButton1.setFont(new java.awt.Font("微软雅黑", 0, 14));

jButton1.setText("\u767b\u9646");

jButton1.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

jButton1ActionPerformed(evt);

}

});

jButton2.setBackground(new java.awt.Color(223, 216, 216));

jButton2.setFont(new java.awt.Font("微软雅黑", 0, 14));

jButton2.setText("\u53d6\u6d88");

jButton2.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

jButton2ActionPerformed(evt);

}

});

jLabel1.setIcon(new javax.swing.ImageIcon(

getClass().getResource("/images/login_main.jpg"))); // NOI18N

jMenu1.setText("File");

jMenu1.setFont(new java.awt.Font("微软雅黑", 0, 14));

jMenuItem1.setAccelerator(javax.swing.KeyStroke.getKeyStroke(

java.awt.event.KeyEvent.VK_Q,

java.awt.event.InputEvent.CTRL_MASK));

jMenuItem1.setText("Exit");

jMenuItem1.addMouseListener(new java.awt.event.MouseAdapter() {

public void mouseClicked(java.awt.event.MouseEvent evt) {

jMenuItem1MouseClicked(evt);

}

});

jMenuItem1.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

jMenuItem1ActionPerformed(evt);

}

});

jMenu1.add(jMenuItem1);

jMenuBar1.add(jMenu1);

jMenu2.setText("Help");

jMenu2.setFont(new java.awt.Font("微软雅黑", 0, 14));

jMenuItem2.setText("About");

jMenuItem2.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

jMenuItem2ActionPerformed(evt);

}

});

jMenu2.add(jMenuItem2);

jMenuBar1.add(jMenu2);

setJMenuBar(jMenuBar1);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(

getContentPane());

getContentPane().setLayout(layout);

layout.setHorizontalGroup(layout

.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addComponent(jLabel1)

.addGroup(

layout.createSequentialGroup()

.addContainerGap()

.addGroup(

layout.createParallelGroup(

javax.swing.GroupLayout.Alignment.TRAILING,

false)

.addComponent(

jLabel2,

javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(

javax.swing.GroupLayout.Alignment.LEADING,

layout.createSequentialGroup()

.addComponent(

jLabel3)

.addPreferredGap(

javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addGroup(

layout.createParallelGroup(

javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(

layout.createSequentialGroup()

.addGap(10,

10,

10)

.addComponent(

jButton1)

.addGap(47,

47,

47)

.addComponent(

jButton2))

.addComponent(

jPasswordField1)

.addComponent(

jTextField1,

javax.swing.GroupLayout.DEFAULT_SIZE,

197,

Short.MAX_VALUE))

.addContainerGap()))));

layout.setVerticalGroup(layout

.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(

layout.createSequentialGroup()

.addComponent(jLabel1)

.addPreferredGap(

javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addGroup(

layout.createParallelGroup(

javax.swing.GroupLayout.Alignment.BASELINE)

.addComponent(jLabel2)

.addComponent(

jTextField1,

javax.swing.GroupLayout.PREFERRED_SIZE,

24,

javax.swing.GroupLayout.PREFERRED_SIZE))

.addPreferredGap(

javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addGroup(

layout.createParallelGroup(

javax.swing.GroupLayout.Alignment.BASELINE)

.addComponent(jLabel3)

.addComponent(

jPasswordField1,

javax.swing.GroupLayout.PREFERRED_SIZE,

23,

javax.swing.GroupLayout.PREFERRED_SIZE))

.addPreferredGap(

javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addGroup(

layout.createParallelGroup(

javax.swing.GroupLayout.Alignment.BASELINE)

.addComponent(jButton1)

.addComponent(jButton2))

.addContainerGap(

javax.swing.GroupLayout.DEFAULT_SIZE,

Short.MAX_VALUE)));

pack();

}// /editor-fold

// GEN-END:initComponents

private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

About.start();

}

private void jPasswordField1KeyTyped(java.awt.event.KeyEvent evt) {

if (evt.getKeyChar() == '\n') {

String name = jTextField1.getText(); // 获取用户名

String pass = String.valueOf(jPasswordField1.getPassword());// 获取密码

User user = null;

// 未输入用户名

if (name.equals("") || name == null) {

JOptionPane.showMessageDialog(this, "用户名不允许为空！", "cuowu", 0);

return;

}

try {

user = DAOFactory.getIUserDAOInstance().findById(name);

if (user != null) {

if (user.getPass() != null user.getPass().equals(pass)) {

GlobalUser.LOGIN_USER = user; // 记录当前用户

// 进入主界面

Main.start();

this.dispose();

} else {

JOptionPane.showMessageDialog(this, "用户名或密码错误!");

return;

}

}

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

if (user == null) {

JOptionPane.showMessageDialog(this, "用户名或密码错误!", "消息", 0);

return;

}

}

}

private void formKeyTyped(java.awt.event.KeyEvent evt) {

}

private void formKeyPressed(java.awt.event.KeyEvent evt) {

}

private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

}

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

jTextField1.setText("");

jPasswordField1.setText("");

jTextField1.requestFocus();

}

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

String name = jTextField1.getText(); // 获取用户名

String pass = String.valueOf(jPasswordField1.getPassword());// 获取密码

User user = null;

// 未输入用户名

if (name.equals("")) {

JOptionPane.showMessageDialog(this, "用户名不允许为空！");

return;

}

try {

user = DAOFactory.getIUserDAOInstance().findById(name);

if (user != null) {

if (user.getPass() != null user.getPass().equals(pass)) {

GlobalUser.LOGIN_USER = user; // 记录当前用户

// 进入主界面

Main.start();

this.dispose();

} else {

JOptionPane.showMessageDialog(this, "用户名或密码错误!", "消息", 0);

return;

}

}

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

if (user == null) {

JOptionPane.showMessageDialog(this, "用户名或密码错误!", "消息", 0);

return;

}

}

private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {

if (JOptionPane.showConfirmDialog(this, "你确定要退出吗？", "提示",

JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION) {

System.exit(0);

}

}

private void jMenuItem1MouseClicked(java.awt.event.MouseEvent evt) {

System.exit(1);

}

/**

* @param args

* the command line arguments

*/

public static void main(String args[]) {

// System.out.println(Login.class.getResource("src/images/images/login_main.jpg"));

// new javax.swing.ImageIcon(

// Login.class.getResource("../../../../images/login_main.jpg"));

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

java.awt.EventQueue.invokeLater(new Runnable() {

public void run() {

new Login().setVisible(true);

}

});

}

// GEN-BEGIN:variables

// Variables declaration - do not modify

private javax.swing.JButton jButton1;

private javax.swing.JButton jButton2;

private javax.swing.JLabel jLabel1;

private javax.swing.JLabel jLabel2;

private javax.swing.JLabel jLabel3;

private javax.swing.JMenu jMenu1;

private javax.swing.JMenu jMenu2;

private javax.swing.JMenuBar jMenuBar1;

private javax.swing.JMenuItem jMenuItem1;

private javax.swing.JMenuItem jMenuItem2;

private javax.swing.JPasswordField jPasswordField1;

private javax.swing.JTextField jTextField1;

// End of variables declaration//GEN-END:variables

}

用Java实现图书的超期罚款

使用Java数据库驱动包,如:ODBC,JDBC等.数据库产商提供的驱动。对应java.sql.*,javax.sql.*包中有相应的数据库操作常用的类。

两个日期进行比较的话，应该对应于Rental对象,提供一个isExpires()方法,下面我就写一下简单的实现方案了，剩下的还得靠你自己：

public class Rental{

private Date brorrowDate,backDate;

private Book book;

private Borrower borrower;

public boolean isExpires(){

return backDate.compareTo(borrowDate)0;

}

//...自己的业务方法

}

求一个java图书管理系统代码，不需要图形化，命令行就可以，只要求实现导入图书，查询，删除

import java.io.BufferedReader;

import java.io.File;

import java.io.FileReader;

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

public class BookWork {

static ListBook data;

private static Scanner input;

public static void main(String[] args) {

if (!initBook("d:/book.txt")) {

System.out.println("初始图书列表失败 ..");

return;

}

input = new Scanner(System.in);

while (true) {

try {

System.out.println("请输入操作：");

System.out.println("1.找书  2.删除图书 3.退出");

int number = Integer.parseInt(input.next());

if (number == 1) {

findBook();

} else if (number == 2) {

delBook();

} else if (number == 3) {

System.out.println("退出");

break;

} else {

System.out.println("这个不是我要的...重来...");

System.out.println();

}

} catch (Exception e) {

e.printStackTrace();

System.out.println("这个不是我要的...重来...");

System.out.println();

}

}

}

private static void delBook() {

System.out.println("请输入要删除的书名或编号：");

String key = input.next();

if (key != null  !key.equals("")) {

for (Book book : data) {

if (book.number.equals(key) || book.name.contains(key)) {

data.remove(book);

System.out.println(" 图书 " + book.toString() + " 已删除");

return;

}

}

}

System.out.println("没有您要删除的");

}

private static void findBook() {

System.out.println("请输入要查找的书名或编号：");

String key = input.next();

if (key != null  !key.equals("")) {

for (Book book : data) {

if (book.number.equals(key) || book.name.contains(key)) {

System.out.println("找到了 图书 " + book.toString());

return;

}

}

}

System.out.println("没有您要找的");

}

private static boolean initBook(String string) {

try {

System.out.println("图书导入中...");

System.out.println("列表文件 -- " + string);

File file = new File(string);

if (!file.exists()) {

return false;

}

data = new ArrayListBook();

BufferedReader bufferedReader = new BufferedReader(new FileReader(file));

String line = "";

while ((line = bufferedReader.readLine()) != null) {

String[] strings = line.split(",");

Book b = new Book(strings[0], strings[1]);

data.add(b);

System.out.println("导入" + b.toString());

}

} catch (Exception e) {

e.printStackTrace();

return false;

}

return true;

}

public static class Book {

String number;

String name;

public Book(String number, String name) {

super();

this.number = number;

this.name = name;

}

@Override

public String toString() {

return "Book [编码：" + number + ", 名称：" + name + "]";

}

}

}

001,金瓶梅

002,杂事秘辛

003,飞燕外传

004,控鹤监秘记

005,汉宫春色