SSH2简单登录+注册例子

约定不等于承诺〃 2022-05-18 00:55 260阅读 0赞

1、在完成了[SSH2简单登录例子][SSH2]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。

![70][]

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

![70 1][]

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">
    		
    		<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>
    	
    	
    	<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="validateAction" class="com.action.ValidateAction">
    		<property name="userServiceImpl" ref="userServiceImpl"></property>
    	</bean>
    	
    	
    	<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">
    		
    			
    			<action name="validate" class="validateAction">
    				<result name="success">/success.jsp</result>
    				<result name="error">/error.jsp</result>
    			</action>
    			
    			
    			<action name="register" class="validateAction" method="registerUser">
    				<result name="success">/success.jsp</result>
    				<result name="error">/error.jsp</result>
    			</action>
    			
    		</package>
    		
    	</struts>

8、保存修改启动Tomcat，浏览器测试

![70 2][]

![70 3][]

![70 4][]

![70 5][]

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。

[SSH2]: https://blog.csdn.net/zero_130/article/details/81223193
[70]: /images/20220518/165d63e22e3f4412aef68d593b0896a2.png
[70 1]: /images/20220518/2a293587cb92416faf4999301ac6cef3.png
[70 2]: /images/20220518/bf5c1a38fa5e4e91ae1f6ec5d7d8e18c.png
[70 3]: /images/20220518/d902a1bb941b4d48baceda0a5b4ee52c.png
[70 4]: /images/20220518/692d1e68254346349b7d6ad1c948e670.png
[70 5]: /images/20220518/4f835369acea40619c7aa11c37a2a8a1.png