java管理系统有效代码 javaweb简单管理系统源码
求用Java编写的学生成绩管理系统的完整代码，要能运行的
以下方法实现了用户界面登陆
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import java.awt.*;
import java.awt.event.*;
public class DengLuJieMian extends Frame implements ActionListener
{
Label username=new Label("用户名：");//使用文本创建一个用户名标签
TextField t1=new TextField();//创建一个文本框对象
Label password=new Label("密码：");//创建一个密码标签
TextField t2=new TextField();
Button b1=new Button("登陆");//创建登陆按钮
Button b2=new Button("取消");//创建取消按钮
public DengLuJieMian()
{
this.setTitle("学生信息管理系统");//设置窗口标题
this.setLayout(null);//设置窗口布局管理器
username.setBounds(50,40,60,20);//设置姓名标签的初始位置
this.add(username);// 将姓名标签组件添加到容器
t1.setBounds(120,40,80,20);// 设置文本框的初始位置
this.add(t1);// 将文本框组件添加到容器
password.setBounds(50,100,60,20);//密码标签的初始位置
this.add(password);//将密码标签组件添加到容器
t2.setBounds(120,100,80,20);//设置密码标签的初始位置
this.add(t2);//将密码标签组件添加到容器
b1.setBounds(50,150,60,20);//设置登陆按钮的初始位置
this.add(b1);//将登陆按钮组件添加到容器
b2.setBounds(120,150,60,20);//设置取消按钮的初始位置
this.add(b2);// 将取消按钮组件添加到容器
b1.addActionListener(this);//给登陆按钮添加监听器
b2.addActionListener(this);// 给取消按钮添加监听器
this.setVisible(true);//设置窗口的可见性
this.setSize(300,200);//设置窗口的大小
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});//通过内部类重写关闭窗体的方法
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==b1)//处理登陆事件
{
String name=t1.getText();
String pass=t2.getText();
if(name!=nullpass.equals("000123"))//判断语句
{
new StudentJieMian();
}
}
}
public static void main(String args[])//主函数
{
new DengLuJieMian();
}
}
以下方法实现了学生界面设计
import java.awt.*;
import java.awt.event.*;
class StudentJieMian extends Frame implements ActionListener
{
MenuBar m=new MenuBar();//创建菜单栏
Menu m1=new Menu("信息");//创建菜单“信息”
MenuItem m11=new MenuItem("插入");//创建“插入”的菜单项
MenuItem m12=new MenuItem("查询");
Menu m2=new Menu("成绩");//创建菜单“成绩”
MenuItem m21=new MenuItem("查询");
public StudentJieMian()
{
this.setTitle("学生界面");//设置窗口标题
this.setLayout(new CardLayout());//设置窗口布局管理器
this.setMenuBar(m);//将菜单栏组件添加到容器
m.add(m1);//将信息菜单放入菜单栏
m.add(m2);
m1.add(m11);//将“插入”菜单项添加到“信息”菜单
m1.add(m12); //将“查询”菜单项添加到“信息”菜单
m2.add(m21); //将“查询”菜单项添加到“成绩”菜单
m11.addActionListener(this); //给“插入”菜单项添加监听器
m12.addActionListener(this); //给“查询”菜单项添加监听器
m21.addActionListener(this); //给“查询”菜单项添加监听器
this.setVisible(true); //设置窗口的可见性
this.setSize(300,200); //设置窗口的大小
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);//关闭窗口
}
});
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==m11) //处理“添加信息”事件
{
new AddStudent();
}
if(e.getSource()==m12) //处理“查询信息”事件
{
new SelectStudent();
}
if(e.getSource()==m21) //处理“查询成绩”事件
{
new ChengJiStudent();
}
}
public static void main(String args[])
{ new StudentJieMian(); //创建一个对象 }
求图书管理系统（java）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怎么编写停车场管理系统源代码？
importjava.text.SimpleDateFormat;\x0d\x0aimportjava.util.Date;\x0d\x0aimportjava.util.Scanner;\x0d\x0a\x0d\x0a/*********************************\x0d\x0a*停车场管理\x0d\x0a*authorzhang\x0d\x0a*2013-12-13\x0d\x0a********************************/\x0d\x0apublicclassCarStopManager{\x0d\x0a\x0d\x0apublicstaticvoidmain(String[]args){\x0d\x0aScannersc=newScanner(System.in);\x0d\x0a\x0d\x0aSystem.out.println("请入车牌号:");\x0d\x0aStringcarno=sc.next();\x0d\x0aCarStopManagercarStopManager=newCarStopManager();\x0d\x0acarStopManager.setCarNo(carno);//设置车牌号\x0d\x0a\x0d\x0aSimpleDateFormatformat=newSimpleDateFormat("yyyy-MM-ddHH:mm:ss");\x0d\x0aStringsdate=format.format(newDate());\x0d\x0aSystem.out.println("当前时间（入场时间）是:"+sdate);\x0d\x0a\x0d\x0aSystem.out.println("需要开出车场吗？yes/no:");\x0d\x0aStringyesno=sc.next();\x0d\x0a\x0d\x0aif(yesno.equals("yes")){\x0d\x0aStringedate=format.format(newDate());\x0d\x0aSystem.out.println("出场时间是:"+edate);\x0d\x0a//计算方法\x0d\x0acarManager(2,sdate,edate,carStopManager);\x0d\x0a}\x0d\x0a}\x0d\x0a/**\x0d\x0a*计算方法\x0d\x0a*/\x0d\x0apublicstaticvoidcarManager(inttype,StringstarTime,\x0d\x0aStringendTime,CarStopManagercarStopManager){\x0d\x0a\x0d\x0aif(type==1){//按月收费\x0d\x0aSystem.out.println("如若没有缴纳月费请缴纳800元，如若缴纳将不再提示!");\x0d\x0a}else{\x0d\x0a/**\x0d\x0a*一般不会有停车几个月的吧？先不考虑停车几年或者几个月的\x0d\x0a*/\x0d\x0aStringsDay=starTime.substring(8,10);//入场日期（天）\x0d\x0aStringsHour=starTime.substring(11,13);//入场小时\x0d\x0aStringsMM=starTime.substring(14,16);//入场分钟\x0d\x0a\x0d\x0aStringeDay=starTime.substring(8,10);//出场日期（天）\x0d\x0aStringeHour=endTime.substring(11,13);//出厂小时\x0d\x0aStringeMM=endTime.substring(14,16);//出厂分钟\x0d\x0a\x0d\x0afloatmoney=0;//需缴纳的费用\x0d\x0aintshour=Integer.parseInt(sHour);\x0d\x0aintehour=Integer.parseInt(eHour);\x0d\x0aintsmm=Integer.parseInt(sMM);\x0d\x0aintemm=Integer.parseInt(eMM);\x0d\x0aintrehour=0;//停车几个小时\x0d\x0a\x0d\x0aif(sDay.equals(eDay)){//同一天\x0d\x0a//当天6点到20点之间\x0d\x0aif((shour=6shour
回答于 2022-12-14
新闻名称：java管理系统有效代码 javaweb简单管理系统源码
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