图书馆管理java源代码 图书馆管理系统javaweb

哪一位编程大师帮我用java写一份图书馆管理系统，

运行一下看要不要咯。

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package booksborrow;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

class Student{

String number;

String name;

String[] booksName=new String[4];

int booksNum;

public Student(String number,String name,String booksName,int booksNum){

this.number=number;

this.name=name;

this.booksNum=booksNum;

for(int i=0;i4;i++) {

this.booksName[i]=new String("");

}

}

}

class Books{

static String bname[]={"红楼梦","西游记","三国演义","水浒传","聊斋志异",

"java编程经典","数字电子技术","老人与海","电子商务","子夜","中国十大皇帝",

"邓小平文选","鲁迅散文全集","空蝉","商法","刑法","民法","数据库导论",

"管理信息系统","财务管理","统计学","线性代数","离散数学","逻辑学",

"高等代数"};

static String biden[]=new String[bname.length+1];

static int[] bnum=new int[bname.length+1];

public Books(){

for(int i=0;ibname.length;i++){

bnum[i]=7;

switch(i/10){

case 0:biden[i]="112200"+i;break;

case 1:

case 2:

case 3:biden[i]="11220"+i;break;

}

}

}

boolean count(String books_identifier,int borr_or_retur){

final int borr=0;

final int retur=1;

int i;

for(i=0;biden[i]!=null;i++) {

if(biden[i].equals(books_identifier)) {

break;

}

}

if(biden[i]==null){

System.out.println("\t\t**********无此书!**********");

return false;

}

else if(borr_or_retur==borr) {

if(bnum[i]==0){

System.out.println("\t\t*****此书已全部被借走!*****");

return false;

}

else {

bnum[i]--;

}

}

else {

bnum[i]++;

}

return true;

}

}

class Borrow{

public void borrow(String number,String name,String booksName,String books_identifier,Student[] stu,Books book){

int i,j;

boolean judge=false;

for(i=0;!"".equals(stu[i].number) || stu[i].number.equals("-1");i++) {

if(stu[i].number.equals(number) || stu[i].name.equals(name)){judge=true;break;}

}

if(stu[i].booksNum=4) {

System.out.println("\t对不起，您所借的图书已达到上限，请还书后再继续借书!");

}

else if(book.count(books_identifier,0)) {

if(judge==false) {

stu[i].number=number;

stu[i].name=name;

stu[i].booksName[0]=booksName;

stu[i].booksNum=1;

}

else{

for(j=0;!stu[i].booksName[j].equals("") !stu[i].booksName[j].equals("-1");j++);

stu[i].booksName[j]=booksName;

stu[i].booksNum++;

}

}

}

}

class Return{

public void retur(String number,String name,String booksName,String books_identifier,Student[] stu,Books book){

int i,j;

for(i=0;!"".equals(stu[i].name) || stu[i].name.equals("-1");i++) {

if(stu[i].name.equals(name)) {

break;

}

}

if("".equals(stu[i].name)) {

System.out.println("\t\t**请核实: 您之前并未借书!**");

}

else if(book.count(books_identifier,1)){

for(j=0;!stu[i].booksName[j].equals("") || stu[i].booksName[j].equals("-1");j++) {

if(stu[i].booksName[j].equals(booksName)){

stu[i].booksName[j]="-1";

break;

}

}

stu[i].booksNum--;

if(stu[i].booksNum==0){

stu[i].number="-1";

stu[i].name="-1";

}

}

}

}

class BooksBorrow{

public static void main(String[] args){

Student[] stu=new Student[100000];

String number;

String name;

String booksName;

String books_identifier;

int going=0;

int conti;

int title=0;

Books book=new Books();

Borrow bo=new Borrow();

Return re=new Return();

for(int i=0;i100000;i++) {

stu[i]=new Student("","","",0);

}

do{

System.out.print("\t\t请从以下菜单中选择操作：\n\t\t\t1---------查询图书馆藏"

+ "书概况\n\t\t\t2---------借书\n\t\t\t3---------还书\n\t\t请输入:");

try{BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

title=Integer.parseInt(br.readLine());

}catch(IOException | NumberFormatException e){}

if(title==1){

System.out.println("图书馆藏书概况如下:\n编号\t\t 书名\t\t 可借阅本数");

try{for(int i=0;Books.bname[i]!=null;i++) {

System.out.println(Books.biden[i]+"\t\t"+Books.bname[i]+"\t\t"+Books.bnum[i]);

}

}catch(ArrayIndexOutOfBoundsException e){}

}

else if(title==2) {

try{System.out.print("t********************借书*******************\n\t\t请输入学号:");

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

number=br.readLine();

System.out.print("\t\t请输入姓名:");

name=br.readLine();

do

{System.out.print("\t\t请输入书号:");

books_identifier=br.readLine();

System.out.print("\t\t请输入书名:");

booksName=br.readLine();

bo.borrow(number,name,booksName,books_identifier,stu,book);

System.out.print("\t\t是否继续(1--Y/0--N请输入1或0): ");

conti=Integer.parseInt(br.readLine());

}while(conti==1);

}catch(IOException | NumberFormatException e){System.err.println(e);}

}

else if(title==3) {

try{System.out.print("\t********************还书********************\n\t\t请输入学号:");

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

number=br.readLine();

System.out.print("\t\t请输入姓名:");

name=br.readLine();

do

{System.out.print("\t\t请输入书号:");

books_identifier=br.readLine();

System.out.print("\t\t请输入书名:");

booksName=br.readLine();

re.retur(number,name,booksName,books_identifier,stu,book);

System.out.print("\t\t是否继续(1--Y/0--N请输入1或0): ");

conti=Integer.parseInt(br.readLine());

}while(conti==1);

}catch(IOException | NumberFormatException e){System.err.println(e);}

}

else {

System.out.println("\t\t*********输入错误*********!");

}

try{System.out.print("是否退出(1--Y/0--N请输入1或0)：");

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

going=Integer.parseInt(br.readLine());

}catch(IOException | NumberFormatException e){}

}while(going==0);

}

}

求一个java图书管管理软件登陆界面系统代码

package pack_view;

import java.awt.BorderLayout;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.GridLayout;

import java.awt.Image;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.FocusEvent;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.WindowEvent;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.Statement;

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 javax.swing.UIManager;

import javax.swing.UnsupportedLookAndFeelException;

import javax.swing.plaf.multi.MultiLookAndFeel;

import pack_DB.DB;

public class Login extends JFrame{

/**

* 登陆界面

*/

private static final long serialVersionUID = 1L;

JFrame jf = new JFrame();

private JPanel panel_all ;

private JPanel panel1 = new JPanel();

private JPanel panel2= new JPanel();

private JPanel panel3 = new JPanel();

private JPanel panel4 = new JPanel();

private JLabel jLabel_title;

private JLabel jLabel_name = new JLabel();

private JLabel jLabel_password = new JLabel();

private JTextField jTextField_name = new JTextField(15);

private JPasswordField jPasswordField = new JPasswordField(15);

private JButton jb1 = new JButton();

private JButton jb2 = new JButton();

private Font font;

String cid="";

String passwd ="";

//加载背景图片

// private ImageIcon imageicon;

// private Image image;

public Login() {

jf.setTitle("客户端登陆");

jf.setSize(350, 300);

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();//把用户的显示器屏幕的尺寸（长和宽）赋值给变量screenSize

Dimension frameSize = jf.getSize();

if (frameSize.height screenSize.height) {

frameSize.height = screenSize.height;

}

if (frameSize.width screenSize.width) {

frameSize.width = screenSize.width;

}

//把弹出的对话框窗口放置在屏幕中间

jf.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);

// imageicon = new ImageIcon(ClassLoader

// .getSystemResource("res/backgound.jpg".toString()));

panel_all = new JPanel(){

public void paintComponent(Graphics g){

super.paintComponents(g);

// image = imageicon.getImage();

// if(image != null)

// g.drawImage(image,0,0,getWidth(),getHeight(),this);

}

};

font=new Font("宋体正文", 0,20);

jLabel_title = new JLabel(new ImageIcon(ClassLoader

.getSystemResource("res/Login.jpg".toString())));

jLabel_title.setFont(font);

jLabel_title.setText("用户登陆");

jLabel_name.setFont(new java.awt.Font("Dialog", 0, 14));

jLabel_name.setText("用户名：");

jLabel_password.setFont(new java.awt.Font("Dialog", 0, 14));

jLabel_password.setText("密 码：");

jb1.setFont(new java.awt.Font("Dialog", 0, 18));

jb1.setText("确 认");

jb2.setText("取 消");

jb2.setFont(new java.awt.Font("Dialog", 0, 18));

jTextField_name.addKeyListener(new KeyAdapter()

{

public void keyPressed(KeyEvent e)

{

if(e.getKeyCode()==KeyEvent.VK_ENTER)

{

jb1.doClick();

}

}});

jPasswordField.addKeyListener(new KeyAdapter()

{

public void keyPressed(KeyEvent e)

{

if(e.getKeyCode()==KeyEvent.VK_ENTER)

{

jb1.doClick();

}

}});

panel1.add(jLabel_name);

panel1.add(jTextField_name);

panel2.add(jLabel_password);

panel2.add(jPasswordField);

panel3.add(jb1);

panel3.add(jb2);

panel4.add(jLabel_title);

panel_all.setLayout(new GridLayout(4,1));

panel_all.add(panel4);

panel_all.add(panel1);

panel_all.add(panel2);

panel_all.add(panel3);

panel_all.setOpaque(false);

jf.setLayout(new BorderLayout());

jf.add(panel_all);

jb1.addMouseListener(new MouseAdapter(){

public void mouseClicked(MouseEvent me){

// if(lc.validate(jTextField_name.getText().trim(),new String(jPasswordField.getPassword()).trim())){

// doLogin();

// new MainFrame();

// }

// else

// JOptionPane.showMessageDialog(null, "Password doesn't match account,please try again!");

}

});

jb2.addMouseListener(new MouseAdapter(){

public void mouseClicked(MouseEvent me){

System.exit(0);

}

});

jf.setVisible(true);

jf.repaint();

jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

/* public void doLogin(){

cid=jTextField_name.getText().trim();

passwd=jPasswordField.getText().trim();

String sql = "select *from customer where "+"cid='"+cid+"' and password='"+passwd+"'";

if (DB.connectDB()) {

if (DB.query(sql)){

System.out.print("登陆成功");

jf.dispose();

new MainFrame(cid);

return;

} else {

System.out.print("登陆失败");

return;

}

}

}

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

new Login();

}

}

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

求图书馆管理系统的JAVA源代码

#字典插入与赋值

for word in words:

if word!="" and table.has_key(word): #如果存在次数加1

num = table[word]

table[word] = num + 1

elif word!="": #否则初值为1

table[word] = 1

i = i + 1

java图书管理界面系统的源代码

java　swing　登陆界面code

/*

* 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编写一个 图书馆图书借阅管理系统

---------------------------------------------------

给你修改了三个地方：

1.borrowBooks方法中，将System.out.println("你要借吗？"); 改为：

System.out.println("你要借吗？输入1表示借，其他数字表示不借。");

保证输入的时候输入的数字，否则会报出异常。

2.borrowBooks方法中，将self[score] = all[9]; 改为：self[score] = all[i];

如果是all[9]，那么就始终是最后一本书籍信息了。

3.have方法中，你是想将所借的书籍信息都打印出来。修改的比较多，下面注释代码是原来的。

void have(Books[] self) {

// for (int i = 0; i 2; i++) {

// self[i].showBookInfo();

// }

for (int i = 0; i 3; i++) {

if(self[i]!=null)

self[i].showBookInfo();

}

}

****************** 附上所有代码：*************************

import java.util.Scanner;

public class TestBook {

public static void main(String[] args) {

Books all[] = new Books[10];

Books self[] = new Books[3];

all[0] = new Books("java", 1, "12345", "tom", 34.0f, "人民出版社");

all[1] = new Books("c", 2, "12346", "tnn", 31.0f, "人民出版社");

all[2] = new Books("c++", 3, "12445", "mm", 35.0f, "人民出版社");

all[3] = new Books("c#", 4, "12365", "tt", 38.0f, "人民出版社");

all[4] = new Books("j2se", 5, "13345", "tosm", 31.1f, "人民出版社");

all[5] = new Books("j2ee", 6, "18345", "ttm", 32.0f, "人民出版社");

all[6] = new Books("jsp", 7, "12335", "cc", 33.0f, "人民出版社");

all[7] = new Books("net", 8, "12341", "bb", 36.0f, "人民出版社");

all[8] = new Books("ip", 9, "12343", "aa", 37.0f, "人民出版社");

all[9] = new Books("tcp", 10, "22345", "jj", 39.0f, "人民出版社");

Readers r = new Readers("xiaoming", 101, "1", 3);

r.searchAllBooks(all);

r.borrowBooks(all, self);

r.have(self);

r.give(all, self);

}

}

class Readers {

Scanner scan = new Scanner(System.in);

String names;

int nums;

String classes;

int grade;

int score = 0;

// Books self[]=new Books[3];

Readers(String n, int u, String c, int g) {

names = n;

nums = u;

classes = c;

grade = g;

}

void searchAllBooks(Books[] all) {// 查书

for (int i = 0; i 10; i++)

all[i].showBookInfo();

// self[score]=all[0];

}

void give(Books[] all, Books[] self) {// 还书

System.out.println("请输入您要还的书的书号");

int n = scan.nextInt();

for (int i = 0; i 10; i++) {

if (n == all[i].num) {

for (int j = 0; j 3; j++) {

if (self[j] == all[i]) {

self[j] = null;

System.out.println("还书成功");

}

}

}

}

}

void have(Books[] self) {

// for (int i = 0; i 2; i++) {

// self[i].showBookInfo();

// }

for (int i = 0; i 3; i++) {

if(self[i]!=null)

self[i].showBookInfo();

}

}

void giveMoney() {

}

void borrowBooks(Books[] all, Books[] self) {

System.out.println("请输入您要查找的书名：");

String n = scan.next();

int i;

for (i = 0; i 10; i++) {

if (n.equals(all[i].name)) {

all[i].showBookInfo();

break;

}

}

//System.out.println("你要借吗？");

System.out.println("你要借吗？输入1表示借，其他数字表示不借。");

int j;

j = scan.nextInt();

if (j == 1) {

System.out.println("借阅成功");

//self[score] = all[9];

self[score] = all[i];

score += 1;

}

if (score 4) {

System.out.println("您还可以借阅" + (3 - score) + "本");

} else {

System.out.println("对不起，一个人只能借3本");

}

}

}

class Books {

String name;

int num;

String ISBN;

String writer;

float price;

String publisher;

Books(String n, int u, String i, String w, float p, String l) {

name = n;

num = u;

ISBN = i;

writer = w;

price = p;

publisher = l;

}

void showBookInfo() {

System.out.println("**************************");

System.out.println("书名：" + name);

System.out.println("索书号：" + num);

System.out.println("ISBN号：" + ISBN);

System.out.println("价格：" + price);

System.out.println("出版社：" + publisher);

System.out.println("**************************");

}

}

----------------------------------------------------