这篇文章主要介绍了java通过JFrame做一个登录系统的界面完整代码示例，具有一定借鉴价值，需要的朋友可以参考下。
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在java的JFrame内通过创建匿名对象的方式做登录界面
package com.sxt;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class LoginFrame extends JFrame{
JTextField txtname=new JTextField();
JPasswordField txtpass=new JPasswordField();
JButton bl=new JButton("登录");
JButton bg=new JButton("关闭");
//构造无参构造器把主要的方法放在构造器里,然后在main方法里面调
public LoginFrame(){
setBounds(25,25,250,250);
Container c = getContentPane();
c.setLayout(new GridLayout(4,2,10,10));
c.add(new JLabel("用户名"));
c.add(txtname);
c.add(new JLabel("密码"));
c.add(txtpass);
c.add(bl);
c.add(bg);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
//注意：此处是匿名内部类
bg.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
}
);
//注意：此处是匿名内部类
bl.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
要使用Java编写超市购物程序，您需要使用Java数据库编程技术来连接到您的数据库并执行相关的数据库操作。在Java中，您可以使用JDBC（Java数据库连接）API来连接到数据库并执行SQL语句。例如，您可以使用JDBC API来执行以下操作：
创建数据库连接
执行增删改查（CRUD）操作
提交或回滚事务
执行存储过程和函数
查询数据库元数据
此外，您还可以使用Java的面向对象编程技术来封装数据库操作，以便更方便地在您的程序中使用。例如，您可以创建一个类来表示超市商品，并定义一些方法来执行商品的增删改查操作。这样，您就可以在程序中通过调用这些方法来简单地完成对数据库的操作，而不需要编写复杂的SQL语句。
哎，我还是自己代码黏贴给你吧！免得总通不过！装不下这么多字，详情自己找我。 连接数据库类（添加修改会员信息） package com.to.java; import java.util.Scanner; import java.sql.*; public class Vds { Scanner Input=new Scanner(System.in); ZhuCK1 zhuck1=new ZhuCK1(); public void x(){ try{ Connection con=null; Statement stmt=null; ResultSet rs=null; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String ur1="jdbc:odbc:gg"; con=DriverManager.getConnection(ur1); stmt=con.createStatement(); String sqlstmt="select id,mm from gg"; rs=stmt.executeQuery(sqlstmt); System.out.println("----------查询结果---------"); System.out.println(); System.out.println("会员号--密码"); while(rs.next()){ String id=rs.getString("id"); String mm=rs.getString("mm"); System.out.println(id+" "+mm); } con.close(); stmt.close(); }catch(Exception e){ System.out.println(e);} System.out.println("是否返回上级菜单"); System.out.println("1.是"); System.out.println("2.否"); int m=Input.nextInt(); switch(m){ case 1: zhuck1.ZhucK1(); break; case 2: { System.out.println("欢迎下次再次使用");System.exit(-1);}; break; }} public void j(){ try{ Connection con=null; Statement stmt=null; ResultSet rs=null; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String ur1="jdbc:odbc:gg"; con=DriverManager.getConnection(ur1); stmt=con.createStatement(); String sqlstmt="select id,mm from gg"; rs=stmt.executeQuery(sqlstmt); while(rs.next()){ String id=rs.getString("id"); String mm=rs.getString("mm"); System.out.println(id+" "+mm); } Scanner input=new Scanner(System.in); System.out.println("请输入会员信息："); System.out.println("请输入会员号："); String f=input.next(); System.out.println("请输入密码："); String q=input.next(); String sqlst="insert into gg values('"+f+"','"+q+"')"; Statement tatement=con.createStatement(); int result=tatement.executeUpdate(sqlst); System.out.println("操作成功！"); con.close(); stmt.close(); }catch(Exception e){ System.out.println(e); } System.out.println("是否返回上级菜单"); System.out.println("1.是"); System.out.println("2.否"); int m=Input.nextInt(); switch(m){ case 1: zhuck1.ZhucK1(); break; case 2: { System.out.println("欢迎下次再次使用");System.exit(-1);}; break; } } public void xg(){ try{ Connection con=null; Statement stmt=null; ResultSet rs=null; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String ur1="jdbc:odbc:gg"; con=DriverManager.getConnection(ur1); stmt=con.createStatement(); String sqlstmt="select id,mm from gg"; rs=stmt.executeQuery(sqlstmt); while(rs.next()){ String id=rs.getString("id"); String mm=rs.getString("mm"); System.out.println(id+" "+mm); } Scanner input=new Scanner(System.in); System.out.println("请输入会员信息："); System.out.println("请输入要修改的会员号："); String f=input.next(); System.out.println("请输入修改的密码："); String q=input.next(); String sqlst="update gg set mm='"+q+"' where id='"+f+"'"; Statement tatement=con.createStatement(); int result=tatement.executeUpdate(sqlst); System.out.println("操作成功！"); con.close(); stmt.close(); }catch(Exception e){ System.out.println(e); } System.out.println("是否返回上级菜单"); System.out.println("1.是"); System.out.println("2.否"); int m=Input.nextInt(); switch(m){ case 1: zhuck1.ZhucK1(); break; case 2: { System.out.println("欢迎下次再次使用");System.exit(-1);}; break; } } } package com.to.java; import java.util.Scanner; public class KeHu { Vds sj=new Vds(); public void kehu1(){ Scanner Input=new Scanner(System.in); ZhuCK1 zhuck1=new ZhuCK1(); System.out.println("******************************************************"+"\n\n"); System.out.println("1.显示所有客户信息"); System.out.println("2.添加客户信息"); System.out.println("3.修改客户信息"); System.out.println("4.查询客户信息"); System.out.println("5.返回上级菜单"); System.out.println("******************************************************"+"\n\n"); System.out.println("请输入数字："); int a=Input.nextInt(); switch(a){ case 1: sj.x(); break; case 2: sj.j(); break; case 3: sj.xg(); break; case 4: sj.x();break; case 5: zhuck1.ZhucK1();break; } } } package com.to.java; public class GouWuXiTong { public static void main(String[] args){ ZhuCK zhuck=new ZhuCK(); zhuck.ZhucK(); } } package com.to.java; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; import java.util.Scanner; public class ZhuCK { Scanner Input=new Scanner(System.in); public void ZhucK(){ ZhuCK1 zhuck1=new ZhuCK1(); System.out.println("\t\t"+"欢迎使用我心我素购物系统"); System.out.println("******************************************************"+"\n\n"); System.out.println("\t\t"+"1.登陆系统"); System.out.println(); System.out.println("\t\t"+"2.退出"+"\n\n"); System.out.println("******************************************************"); int d=1; while(d!=2){ System.out.println("请输入会员号："); String p=Input.next(); System.out.println("请输入密码："); String f=Input.next(); try{ Connection con=null; Statement stmt=null; ResultSet rs=null; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String ur1="jdbc:odbc:gg"; con=DriverManager.getConnection(ur1); stmt=con.createStatement(); String sqlstmt="select * from gg"; rs=stmt.executeQuery(sqlstmt); while(rs.next()){ String id=rs.getString("id"); String mm=rs.getString("mm"); if(id.equals(p)mm.equals(f)){ { System.out.println("请输入数字："); int a=Input.nextInt(); switch(a){ case 1: zhuck1.ZhucK1(); break; case 2: break; }d=2; } } } }catch(Exception e){ System.out.println(e);} {System.out.println("输入错误请再次输入：");d=1;} } }} }
1.index.jsp登陆界面：
%@ page language="java" import="java.util.*" pageEncoding="GB2312"%
%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%
%session.invalidate();% %--销毁所有session对象--%
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
base href="%=basePath%"
title购物车/title
meta http-equiv="pragma" content="no-cache"
meta http-equiv="cache-control" content="no-cache"
meta http-equiv="expires" content="0"
meta http-equiv="keywords" content="keyword1,keyword2,keyword3"
meta http-equiv="description" content="This is my page"
!--
link rel="stylesheet" type="text/css" href="styles.css"
--
/head
body
center
hr
请输入用户名，默认的为Guest
form action="checklogin.jsp" mothod=get
table width="40%" border="1"
tr bgcolor="#336600"
tddiv align="center"font color="FFFFFF"用户登陆/font/div/td
/tr
tr align="center" bgcolor="#CCCCCC"
td用户名：input type="password" name="userID"/td
/tr
tr align="center" bgcolor="#CCCCCC"
td口 令：input type="password" name="password"/td
/tr
tr align="center" bgcolor="#CCCCCC"
tdinput type="submit" value="登陆"/td
/tr
/table
/form
/center
/body
/html
2.checklogin.jsp登陆认证页面：
%@ page language="java" import="java.util.*" pageEncoding="GB2312"%
%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%
jsp:useBean id="Car" class="web.Car" scope="session"
jsp:setProperty property="*" name="Car"/
/jsp:useBean
%session.setMaxInactiveInterval(900); % %--设置session超时为30分--%
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
base href="%=basePath%"
titleMy JSP 'checklogin.jsp' starting page/title
meta http-equiv="pragma" content="no-cache"
meta http-equiv="cache-control" content="no-cache"
meta http-equiv="expires" content="0"
meta http-equiv="keywords" content="keyword1,keyword2,keyword3"
meta http-equiv="description" content="This is my page"
!--
link rel="stylesheet" type="text/css" href="styles.css"
--
/head
body
%
String nextpage;
if(Car.getUserID().equals("Guest"))
nextpage="car.jsp";
else
nextpage="index.jsp";
%
jsp:forward page="%=nextpage%"/jsp:forward
/body
/html
3.car.jsp购物车页面
%@ page language="java" import="java.util.*" pageEncoding="GB2312"%
%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%
%@ page import="java.util.*" %
%@ page import="web.Car" %
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
base href="%=basePath%"
title购物车/title
meta http-equiv="pragma" content="no-cache"
meta http-equiv="cache-control" content="no-cache"
meta http-equiv="expires" content="0"
meta http-equiv="keywords" content="keyword1,keyword2,keyword3"
meta http-equiv="description" content="This is my page"
!--
link rel="stylesheet" type="text/css" href="styles.css"
--
/head
body
br%@ include file="header.jsp" %
hr
font size="2"
jsp:useBean id="Car" class="web.Car" scope="session"
/jsp:useBean
pfont color="#804040" face="楷体_GB2312"
strong百货商场，请尽情的选购商品添加到购物车！/strong
/font
%String str=response.encodeRedirectURL("add.jsp"); %
form action="%=str %" method="post" name="form"
select name="item" value="没选择"
option value="TV"电视机/option
option value="apple"苹果/option
option value="coke"可口可乐/option
option value="milk"牛奶/option
option value="tea"茶叶/option
/select
pfont color="#804040" face="楷体_GB2312"
输入购买的数量：
/font
input type="text" name="mount"
p
input type="radio" name="unit" value="个"个
input type="radio" name="unit" value="公斤"公斤
input type="radio" name="unit" value="台"台
input type="radio" name="unit" value="瓶"瓶p
input type="submit" value="提交添加"
/form
pfont color="#804040" face="楷体_GB2312"你的购物车里有如下商品：/font
font color="#FF8040" size="2"
%
Hashtable list=Car.list_h();
Enumeration enums=list.elements();
while(enums.hasMoreElements()){
String goods=(String) enums.nextElement();
byte b[]=goods.getBytes("ISO-8859-1");
goods=new String(b);
out.println("br"+goods);
}
%
/font
% String strl=response.encodeRedirectURL("selectRemoveGoods.jsp");%
form action="%=strl %" method="post" name="form"
input type="submit" value="修改购物车中的商品"
/form
/font
%@ include file="tail.jsp" %
/body
/html
4.add.jsp 增加物品：
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%
%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
base href="%=basePath%"
title购物车/title
meta http-equiv="pragma" content="no-cache"
meta http-equiv="cache-control" content="no-cache"
meta http-equiv="expires" content="0"
meta http-equiv="keywords" content="keyword1,keyword2,keyword3"
meta http-equiv="description" content="This is my page"
!--
link rel="stylesheet" type="text/css" href="styles.css"
--
/head
body
%@ include file="header.jsp" %
hr
font size="2"
jsp:useBean id="Car" class="web.Car" scope="session"/jsp:useBeanbr
jsp:setProperty name="Car" property="*"/
%Car.add_h();%
font face="楷体_GB2312"
font color="#FF8040" size="2"
p您的购物车有如下商品：
%
Hashtable list=Car.list_h();
Enumeration enums=list.elements();
while(enums.hasMoreElements()){
String goods=(String) enums.nextElement();
byte b[]=goods.getBytes("ISO-8859-1");
goods=new String(b);
out.println("br"+goods);
}
%
/font
%String str=response.encodeRedirectURL("car.jsp"); %
br
form action="%=str %" method="post" neme="form"
input type="submit" value="继续购物"
/form
%String strl=response.encodeRedirectURL("selectRemoveGoods.jsp"); %
br
form action="%=strl %" method="post" neme="form"
input type="submit" value="修改购物车中的物品"
/form
/font
/font
%@ include file="tail.jsp"%
/body
/html
5.selectRemoveGoods.jsp选择删除商品：
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%
%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%
%@ page import="java.util.*" %
%@ page import="web.Car" %
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
base href="%=basePath%"
title购物/title
meta http-equiv="pragma" content="no-cache"
meta http-equiv="cache-control" content="no-cache"
meta http-equiv="expires" content="0"
meta http-equiv="keywords" content="keyword1,keyword2,keyword3"
meta http-equiv="description" content="This is my page"
!--
link rel="stylesheet" type="text/css" href="styles.css"
--
/head
body
br%@ include file="header.jsp" %
hr
jsp:useBean id="Car" class="web.Car" scope="session"
/jsp:useBeanbr
p选择从购物车中删除的物品：
%String str=response.encodeRedirectURL("removeWork.jsp"); %
form action="%=str %" method="post" name="form"
select name="deleteitem" size="1"
option value="TV"电视机/option
option value="apple"苹果/option
option value="coke"可口可乐/option
option value="milk"牛奶/option
option value="tea"茶叶/option
/select
input type="submit" value="提交删除"
/form
font face="楷体_GB2312"
font color="#FF8040" size="2"
p您的购物车有如下商品：
%
Hashtable list=Car.list_h();
Enumeration enums=list.elements();
while(enums.hasMoreElements()){
String goods=(String) enums.nextElement();
byte b[]=goods.getBytes("ISO-8859-1");
goods=new String(b);
out.println("br"+goods);
}
%
/font/font
%String strl=response.encodeRedirectURL("car.jsp"); %
form action="%=strl %" method="post" neme="form"
input type="submit" value="继续购物"
/form
%@include file="tail.jsp" %
/body
/html
6.removeWork.jsp删除页面：
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%
%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%
%@ page import="java.util.*" %
%@ page import="web.Car" %
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
html
head
base href="%=basePath%"
title购物车/title
meta http-equiv="pragma" content="no-cache"
meta http-equiv="cache-control" content="no-cache"
meta http-equiv="expires" content="0"
meta http-equiv="keywords" content="keyword1,keyword2,keyword3"
meta http-equiv="description" content="This is my page"
!--
link rel="stylesheet" type="text/css" href="styles.css"
--
/head
body
%@include file="header.jsp" %
hr
font size="2"
jsp:useBean id="Car" class="web.Car" scope="session"
/jsp:useBeanbr
%String str=response.encodeRedirectURL("removeWork.jsp"); %
%String name=request.getParameter("deleteitem");
if(name==null)
name="";
byte c[]=name.getBytes("ISO-8859-1");
name=new String(c);
Car.dele_h(name);
out.println("您删除了货物"+name);%
/font
font face="楷体_GB2312"
font color="#FF8040" size="2"
p您的购物车有如下商品：
%
Hashtable list=Car.list_h();
Enumeration enums=list.elements();
while(enums.hasMoreElements()){
String goods=(String) enums.nextElement();
byte b[]=goods.getBytes("ISO-8859-1");
goods=new String(b);
out.println("br"+goods);
}
%
/font/font
%String strp=response.encodeRedirectURL("car.jsp"); %
form action="%=strp %" method="post" neme="form"
input type="submit" value="继续购物"
/form
%String strl=response.encodeRedirectURL("selectRemoveGoods.jsp"); %
form action="%=strl %" method="post" neme="form"
input type="submit" value="修改购物车中的物品"
/form
/body
/html
7.header.jsp页面头部：
%@ page language="java" import="java.util.*" pageEncoding="GB2312"%
center
========================================================================br
购物车系统br
=======================================================================br
WELCOME！
jsp:getProperty name="Car" property="userID"/
当前时间是：
%=new java.util.Date().toLocaleString() %
br
/center
8.tail页面尾部
%@ page language="java" import="java.util.*" pageEncoding="GB2312"%
center
hr
JSP+TOMCAT购物系统
/center
9.Car.java类
package web;
import java.util.*;
import java.io.*;
public class Car implements Serializable{
Hashtable list=new Hashtable(); //散列表，商品列表
String item="Welcome";
int mount=0; //商品数量
String unit=null; //商品单位
String userID; //用户
public void Car(){
}
public void setItem(String item) {
this.item = item;
}
public void setMount(int mount) {
this.mount = mount;
}
public void setUnit(String unit) {
this.unit = unit;
}
public String getUserID() {
return userID;
}
public void setUserID(String userID) {
this.userID = userID;
}
public Hashtable list_h() {
return list;
}
public void dele_h(String s) {
list.remove(s);
}
public void add_h(){
String str="Name:"+item+"Mount:"+mount+"Unit:"+unit;
list.put(item, str);
}
}
N种办法
1、mybatis 配置文件 写SQL 解决
2、通过JAVA service 通过父类信息查询子类并封装
3、提供一个接口，前台二级联动方式，点第一个给后台传值0 ，查询父ID为0 的 当点击第二个联动的时候 把第一个信息的ID 给你传过去，如 电子数码ID 为1 那就传1 后台还是根据父类查询，也就是 父类ID 1 这样就查出 所对应的 子类信息了。
