SSH2简单登录+注册例子

1、在完成了SSH2简单登录例子的前提下添加注册功能

2、在WebRoot下新建、编写register.jsp、修改login.jsp添加注册链接

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head> 
    <title>register.jsp</title>
  </head>
  
  <body> 
    <s:form action="register" method="post">
    	<table>
    	<caption><h2>Welcome Register</h2></caption>
    		<tr>
    			<s:textfield name="user.id" label="please input your ID"/>
    		</tr>
    		<tr>
    			<s:textfield name="user.userName" label="please input your accountName"/>
    		</tr>
    		<tr>
    			<s:password name="user.password" label="please input your password"/>
    		</tr>
    		<tr>
    			<s:password  label="please input again your password"/>
    		</tr>
    		<tr>
   				<s:reset value="reset"/>
   				<s:submit value="sumbit"/>
   		</tr>
    	</table>
    </s:form>
  </body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>   
    <title>ssh2 login</title> 
  </head>
  
  <body>
   	<h2>USER LOGIN</h2>
   	<s:form action="validate" method="post">
   		<table>
   			<tr>
   				<s:textfield name="user.userName" label="Account"/>
   				<s:password name="user.password" label="Passsword"/>
   			</tr>
   			<tr>
   				<s:reset value="reset"/>
   				<s:submit value="sumbit"/>
   			</tr>
   			<tr>
   			<td>have not a account?</td><td><a href="register.jsp">click here</a></td>
   			</tr>
   		</table>
   	</s:form>
  </body>
</html>

3、新添加service服务层类，提供业务方法调用Dao的操作，彻底解耦action层与dao层。在src>com.service包下编写InterUserService接口类、UserServiceImpl实现类，其中实现类包含InterUserDao的对象属性方法。

package com.service;

import com.pojo.Loginusers;

public interface InterUserService {
	
	public Loginusers validate(String name,String password);  //提供用户验证业务方法
	
	public Loginusers register(Loginusers user);			//提供用户注册业务方法
}

package com.service;

import com.dao.InterUserDao;
import com.pojo.Loginusers;

public class UserServiceImpl implements InterUserService {
	
	private InterUserDao  userDaoImpl;
	public InterUserDao getUserDaoImpl() {
		return userDaoImpl;
	}

	public void setUserDaoImpl(InterUserDao userDaoImpl) {
		this.userDaoImpl = userDaoImpl;
	}

	public Loginusers validate(String name, String password) {
		// 直接调用Dao层数据库验证方法
		return userDaoImpl.validate(name, password);
	}

	public Loginusers register(Loginusers user) {
		// 先进行表单验证，id和name是否已存在
		if(!userDaoImpl.checkAccountAndId(user.getUserName(),user.getId())){
			if(userDaoImpl.saveUser(user))
				return userDaoImpl.validate(user.getUserName(), user.getPassword());
			else 
				return null;
		}else
			return null;
	}

}

4、修改添加dao层数据库操作方法类

package com.dao;

import org.hibernate.Session;
import org.hibernate.SessionFactory;

public class BaseDao {
	
	 //Dao持久层访问SessionFactor获取session对象的中间组件
	//解耦Dao层与SessionFactory
	
	private SessionFactory sessionFactory;

	public SessionFactory getSessionFactory() {
		return sessionFactory;
	}

	public void setSessionFactory(SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
	} 
	public Session getSession(){
		return sessionFactory.openSession();
	}
}

package com.dao;

import com.pojo.Loginusers;

public interface InterUserDao {
	public Loginusers validate(String name,String password);	//提供验证方法
	public boolean checkAccountAndId(String name,int id);	//根据用户名和id检查是否有该用户
	public boolean saveUser(Loginusers user);	   //保存用户
}

package com.dao;

import java.sql.SQLException;
import java.util.Iterator;
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.dao.BaseDao;
import com.pojo.Loginusers;

public class UserDaoImpl extends BaseDao implements InterUserDao{
	
	@Override
	public Loginusers validate(String name,String password) {
		// TODO Auto-generated method stub
		String hql="from Loginusers u where u.userName=? and u.password=?";	
		Session session=getSession();	//从继承的类中获得session对象
		Query query=session.createQuery(hql);
		query.setParameter(0,name);
		query.setParameter(1, password);
		List list=query.list();
		Iterator it=list.iterator();
		while(it.hasNext()){
			if(list.size()!=0){
				Loginusers user=(Loginusers)it.next();
				return user;
			}
		}
		session.close();
		return null;
	}

	@Override
	public boolean checkAccountAndId(String name,int id) {
		// TODO Auto-generated method stub
		String hql="from Loginusers u where u.userName=? or u.id=?";
		Session session=getSession();	//从继承的类中获得session对象
		Query query=session.createQuery(hql);
		query.setParameter(0, name);
		query.setParameter(1, id);
		List list=query.list();
		Iterator it=list.iterator();
		while(it.hasNext()){
			if(list.size()!=0){
				return true;
			}
		}
		session.close();
		return false;
	}	

	@Override
	public boolean saveUser(Loginusers user) {
		// TODO Auto-generated method stub
		Session session=getSession();	//从继承的类中获得session对象
		try{
			Transaction ts=session.beginTransaction();
			session.save(user);
			ts.commit();
		}catch(Exception e){
			e.printStackTrace();
			return false;
		}
		session.close();
		return true;
	}
}

5、修改action类ValidateAction，在其中加入register()注册控制流程方法、添加InterUserService接口对象的属性和get/set方法

取消直接从spring获取实例bean调用Dao方法，改由service接口调用。spring负责bean的依赖注入。

package com.action;

import java.util.Map;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

import com.dao.InterUserDao;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.pojo.Loginusers;
import com.service.InterUserService;

public class ValidateAction extends ActionSupport{
	private Loginusers user;
	ActionContext acontext;
	private InterUserService userServiceImpl;

	public InterUserService getUserServiceImpl() {
		return userServiceImpl;
	}

	public void setUserServiceImpl(InterUserService userServiceImpl) {
		this.userServiceImpl = userServiceImpl;
	}

	public Loginusers getUser() {
		return user;
	}

	public void setUser(Loginusers user) {
		this.user = user;
	}
	
	//用户注册，通过调用业务注册service方法完成
	public String registerUser(){
		Loginusers u=new Loginusers(user.getId(),user.getUserName(),user.getPassword());
		Loginusers user1=null;
		user1=userServiceImpl.register(u);
		if(user1!=null){
			acontext=ActionContext.getContext();
			Map session=acontext.getSession();
			session.put("user", user1);
			return SUCCESS;
		}else
			return ERROR;
	}
	
	public String execute()throws Exception{
		String account=user.getUserName();
		String password=user.getPassword();
		boolean flag=false;
		Loginusers user1=null;
		
		acontext=ActionContext.getContext();
		Map session=acontext.getSession();
		user1=(Loginusers)session.get("user");
		
		if(user1==null){
			System.out.println("null user1");
			user1=userServiceImpl.validate(account, password);
			if(user1!=null){
				System.out.println("not nll");
				session.put("user",user1);
				flag=true;
			}
		}else{
			flag=true;
		}
		if(flag)
			return SUCCESS;
		else
			return ERROR;
	}	
	
}

6、修改applicationContext.xml文件，添加UserService的bean配置，包含UserDaoImpl的属性设置

<?xml version="1.0" encoding="UTF-8"?>
<beans
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd" xmlns:tx="http://www.springframework.org/schema/tx">

	<bean id="dataSource"
		class="org.apache.commons.dbcp.BasicDataSource">
		<!-- 配置数据库驱动 -->
		<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
		
		<property name="url" value="jdbc:mysql://localhost:3306/mydb?useSSL=false"></property>
		<property name="username" value="root"></property>
		<property name="password" value="root123"></property>
	</bean>
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<property name="dataSource">
			<ref bean="dataSource" />
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">
					org.hibernate.dialect.MySQLDialect
				</prop>
			</props>
		</property>
		<property name="mappingResources">
			<list>
				<value>com/pojo/Loginusers.hbm.xml</value></list>
		</property>
	</bean>
	<bean id="transactionManager"
		class="org.springframework.orm.hibernate4.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory" />
	</bean>
	
	<!-- dao -->
	<bean id="baseDao" class="com.dao.BaseDao">
		<property name="sessionFactory"><ref bean="sessionFactory"></ref></property>
	</bean>
	<bean id="userDaoImpl" class="com.dao.UserDaoImpl" parent="baseDao"></bean>
	<!-- <bean id="interUserDao" class="com.dao.InterUserDao"></bean> 不装配接口-->
	
	<!-- action -->
	<bean id="validateAction" class="com.action.ValidateAction">
		<property name="userServiceImpl" ref="userServiceImpl"></property>
	</bean>
	
	<!-- service -->
	<bean id="userServiceImpl" class="com.service.UserServiceImpl">
		<property name="userDaoImpl" ref="userDaoImpl"></property>
	</bean>
	
	<tx:annotation-driven transaction-manager="transactionManager" />
	
	</beans>
	
	

7、在struts.xml中为在action中新添加的register方法配置action信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
        "http://struts.apache.org/dtds/struts-2.0.dtd">
	<struts>
		<package name="default" extends="struts-default">
		
			<!-- 用户登录action -->
			<action name="validate" class="validateAction">
				<result name="success">/success.jsp</result>
				<result name="error">/error.jsp</result>
			</action>
			
			<!-- 保存注册用户 -->
			<action name="register" class="validateAction" method="registerUser">
				<result name="success">/success.jsp</result>
				<result name="error">/error.jsp</result>
			</action>
			
		</package>
		<!-- <constant name="struts.i18n.encoding" value="gb2312"></constant> -->
	</struts>
 

8、保存修改启动Tomcat，浏览器测试

在这次实例中仅进行了id值及用户名的去重没有做进一步的表单验证，而这项功能实现并不困难，使用struts的验校器便可做到。或者甚至可在此基础上轻易地增加更多想要的功能，足可见框架带来的便捷性。