SSM框架下实现登录注册的示例代码

基本配置：jdk1.8 tomcat 8 MyEclipse

先打好地基：

spring配置文件 application.xml：

<?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:aop="http://www.springframework.org/schema/aop"
 xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:mvc="http://www.springframework.org/schema/mvc"
 xsi:schemaLocation="
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
   http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
   http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
   http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
   http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
 <!-- 通过注解，将Service的生命周期纳入Spring的管理 -->
 <context:annotation-config />
 <!-- 通过注解，将Service的生命周期纳入Spring的管理 -->
 <context:component-scan base-package="service"></context:component-scan>
 <bean id="dataSource"
 class="org.springframework.jdbc.datasource.DriverManagerDataSource">
 
 <!-- 配置数据源 -->
 <property name="driverClassName">
  <value>com.microsoft.sqlserver.jdbc.SQLServerDriver</value>
 </property>
 
 <property name="url">
  <value>jdbc:sqlserver://localhost:1433;DatabaseName=Organic
  </value>
 </property>
 
 <property name="username">
  <value>sa</value>
 </property>
 
 <property name="password">
  <value>123456</value>
 </property>
 
 </bean>
 <!-- 扫描存放SQL语句的Shop.xml -->
 <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
 <property name="typeAliasesPackage" value="pojo"></property>
 <property name="dataSource" ref="dataSource"></property>
 <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
 </bean>
 <!-- 扫描Mapper，并将其生命周期纳入Spring的管理 -->
 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
 <property name="basePackage" value="mapper"></property>
 </bean>
 
 <!--4.配置事务管理器 -->
 <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
 <property name="dataSource" ref="dataSource"></property>
 </bean>
 
 <!--5.开启注解进行事务管理  transaction-manager：引用上面定义的事务管理器-->
 <tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

springMVC配置文件 :

<?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:aop="http://www.springframework.org/schema/aop"
  xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:mvc="http://www.springframework.org/schema/mvc"
  xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
    <!-- 扫描Controller,并将其生命周期纳入Spring管理 -->
    <context:component-scan base-package="controller">
    <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    <!-- 注解驱动，以使得访问路径与方法的匹配可以通过注解配置 -->
    <mvc:annotation-driven/>
    <!-- 静态页面，如html,css,js,images可以访问 -->
    <mvc:default-servlet-handler />
    
    <!-- 视图定位 -->
  <bean
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass"
      value="org.springframework.web.servlet.view.JstlView" />
    <property name="prefix" value="/" />
    <property name="suffix" value=".jsp" />
  </bean>
    </beans>

web.xml 配置：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xmlns="http://java.sun.com/xml/ns/javaee" 
     xmlns:web="http://java.sun.com/xml/ns/javaee" 
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
 <display-name>OrganicShopWithSSM</display-name>
 <welcome-file-list>
  <welcome-file>index.html</welcome-file>
  <welcome-file>index.htm</welcome-file>
  <welcome-file>index.jsp</welcome-file>
  <welcome-file>default.html</welcome-file>
  <welcome-file>default.htm</welcome-file>
  <welcome-file>default.jsp</welcome-file>
 </welcome-file-list>
 
 <!-- spring的配置文件-->
 <context-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>classpath:applicationContext.xml</param-value>
 </context-param>
 
 <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
 
 <!-- spring mvc核心：分发servlet -->
 <servlet>
 <servlet-name>mvc-dispatcher</servlet-name>
 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 <!-- spring mvc的配置文件 -->
 <init-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:springMVC.xml</param-value>
 </init-param>
 <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
 <servlet-name>mvc-dispatcher</servlet-name>
 <url-pattern>*.do</url-pattern>
 </servlet-mapping>
 
 <!--配置由Spring 提供的针对中文乱码的编码过滤器 -->
 <!-- 编码过滤器 -->
 <filter>
 <filter-name>CharacterEncodingFilter</filter-name>
 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
 <init-param>
  <param-name>encoding</param-name>
  <param-value>UTF-8</param-value>
 </init-param>
 </filter>
 <filter-mapping>
 <filter-name>CharacterEncodingFilter</filter-name>
 <url-pattern>/*</url-pattern>
 </filter-mapping>
</web-app>

开始第一层啦：

pojo包：UserInfo 类

package pojo;
 
public class UserInfo {
 private String uid;
 private String name;
 private String email;
 private String password;
 public String getUid() {
  return uid;
 }
 public void setUid(String uid) {
  this.uid = uid;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public String getEmail() {
  return email;
 }
 public void setEmail(String email) {
  this.email = email;
 }
 public String getPassword() {
  return password;
 }
 public void setPassword(String password) {
  this.password = password;
 }
 @Override
 public String toString() {
  return "UserInfo [uid=" + uid + ", name=" + name + ", email="
   + email + ", password=" + password + "]";
 } 
}

mapper层：（注意mybatis的xml文件也要放在mapper层）

ShopMapping.java:

其中@Param注解是为了和xml中的查询参数进行绑定

package mapper;
import org.apache.ibatis.annotations.Param;
import pojo.UserInfo;
public interface ShopMapper {
 public void register(@Param("name")String name,@Param("email")String email,@Param("password")String password);
  public UserInfo login(@Param("email")String email,@Param("password")String password); 
  public int findUser(@Param("email")String email);
 
}

Shop.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
  <mapper namespace="mapper.ShopMapper">
  <select id="login" resultType="UserInfo" parameterType="String" >
  select * from UserInfo where email=#{email} and password=#{password}
  </select>
  
  <select id="register" resultType="UserInfo">
  insert into UserInfo(name,email,password) values (#{name},#{email},#{password})
  </select>
  
  <select id="findUser" resultType="int">
  select count(*) from UserInfo where email=#{email}
  </select>  
  </mapper>

service层：其实在写登陆的时候用了int类型，在想登陆也只要在数据库中查询表单输入的数据就行了，在mapper层的xml的文件中也写了 select count(*) 查询个数，但是结果并不好，因为我要做的还有设置session。

package service;
 
import pojo.UserInfo;
 
public interface ShopService {
 //用户注册
 void regist(String name,String email,String password);
 //用户登录
 UserInfo login(String email,String password);
 //验证
 int findUser(String email); 
}

service实现层：service.Impl

package service.Impl;
 
import mapper.ShopMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import pojo.UserInfo;
import service.ShopService;
 
@Service
public class ShopServiceImpl implements ShopService {
 @Autowired
 public ShopMapper sm;
 
 @Override
 public void regist(String name, String email, String password) {
  sm.register(name, email, password);
 }
 
 @Override
 public UserInfo login(String email, String password) {
 UserInfo user=sm.login(email, password);
 if(user!=null &&user.getPassword().equals(password)){
  return user;
 }
 return null;
 
 }
 
 @Override
 public int findUser(String email) {
 if(sm.findUser(email)==0){
  return 0;
 }
 return 1;
 } 
}

controller层：

package controller;
 
import javax.servlet.http.HttpSession;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
import pojo.UserInfo;
import service.ShopService;
 
@Controller
@RequestMapping("")
public class ShopController {
 @Autowired
 public ShopService ss;
 
 @RequestMapping(value = "registerUser", method = RequestMethod.POST)
 public String registerUser(String name, String email, String password) {
 int findUser = ss.findUser(email);
 
 if (findUser == 0) {
  ss.regist(name, email, password);
  // System.out.println("可以注册");
  return "login";
 } else {
  // System.out.println("注册失败");
  return "register";
 }
 }
 
 @RequestMapping(value = "loginUser", method = RequestMethod.POST)
 public String loginUser(UserInfo user, HttpSession session) {
 // 调用service方法
 user = ss.login(user.getEmail(), user.getPassword());
 
 if (user != null) {
  session.setAttribute("u".user);
  return "index";
 }
 return "login";
 
 }
 
 @RequestMapping("/outLogin")
 public String outLogin(HttpSession session){
 session.invalidate();
 return "index";
 
 }
}

在controller层当中，关于注册的格式要求还需要自行搜索一下，主要讲一下的是登陆。在登陆的这个方法中传递了两个形式参数，UserInfo是实体类，HttpSssion是设置session的关键，后面通过session.setAttribute()设置session，这也是在上文中提到的需要session的部分。在后来的注销中可以使用session.invalidate。

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