SSM整合之实现单点登陆

1.准备测试数据库

2.根据数据库准备测试类

pojo

public class UserInfo {
private int id;
private String username;
private String password;

public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

}

3.DAO

public interface  IUserInfoDao{
    UserInfo doLogin(UserInfo userInfo);
}

4.整合 Spring + Mybatis – ApplicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans">
        <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
                <property name="driverClass" value="${jdbc.driver}"></property>
                <property name="jdbcUrl" value="${jdbc.url}"></property>
                <property name="user" value="${jdbc.username}"></property>
                <property name="password" value="${jdbc.password}"></property>
                <property name="maxPoolSize" value="30"></property>
                <property name="minPoolSize" value="2"></property>
        </bean>
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
                <property name="dataSource" ref="dataSource"></property>
                <property name="typeAliasesPackage" value="com.zjitc.pojo"></property>
                <property name="mapperLocations" value="classpath:mapper/*.xml"/>
                <property name="plugins">
                        <array>
                                <bean class="com.github.pagehelper.PageInterceptor">
                                        <property name="properties">
                                                <props>
                                                        <prop key="helperDialect"></prop>
                                                        <prop key="reasonable"></prop>
                                                </props>
                                        </property>
                                </bean>
                        </array>
                </property>
        </bean>
        <!-- 自动生成dao,mapper-->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
                <property name="basePackage" value="com.zjitc.dao"></property>

                <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
        </bean>
<!--        扫描全部包-->
        <context:component-scan base-package="com.zjitc"></context:component-scan>
        <!-- 配置事务-->
        <!-- 5.配置事务管理器 -->
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
                <property name="dataSource" ref="dataSource"></property>
        </bean>
        <!-- 6.开启事务注解-->
        <tx:annotation-driven></tx:annotation-driven>
</beans>

5.编写mapper.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="com.zjitc.dao.IUserInfoDao" >
<!--字段不一致-->
<!--    <select id="selectUser" resultMap="UserMap">-->
<!--  select * from user-->
<!--</select>-->
<!--    设置结果的映射类型-->
<!--    <resultMap id="UserMap" type="User">-->
<!--        一般通过id标签来映射主键-->
<!--        column = 数据库的列名-->
<!--        property = 结果集对应的数据库列名的映射名-->
<!--        &ndash;&gt;-->
<!--        <id column="id" property="id"/>-->
<!--        <result column="name" property="name"/>-->
<!--        <result column="pwd" property="password"/>-->
<!--    </resultMap>-->
   <select id="doLogin" parameterType="UserInfo" resultType="UserInfo">
       select * from user where username = #{username} and password = #{password}
   </select>
</mapper>

注意namespace得路径一定要对应上方法名要和dao层对应

6. 编写Service层

接口

public interface IUserInfoService {
	UserInfo doLogin(UserInfo userInfo);
}

实现类

public class IUserInfoServiceImpl implements IUserInfoService {
    @Autowired
    private IUserInfoDao iUserInfoDao;
    @Override
    public UserInfo doLogin(UserInfo userInfo) {
        UserInfo user = iUserInfoDao.doLogin(userInfo);
        return user;
    }


}

7.整合 Spring-MVC.xml 和 web.xml

Spring-MVC.xml

<beans xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans">


<!--       扫描位置-->
    <context:component-scan base-package="com.zjitc.controller"></context:component-scan>
<!-- 注解支持-->
    <!-- 注解的处理器映射器的简化配置 -->
<!--    <mvc:annotation-driven></mvc:annotation-driven>-->
<!--    映射处理器适配处理器-->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
<!--    视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--        前缀-->
        <property name="prefix" value="/pages/"></property>
<!--        后缀-->
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

web.xml

<web-app version="3.1" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<!--  加载类路径配置文件  -->
  <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath*:applicationContext.xml</param-value>
    </context-param>
<!--  监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>
<!--  配值解决中文乱码-->
  <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>
<!--  前端控制器，指定加载spingmvc-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <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>dispatcherServlet</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>


</web-app>

8.导入页面/view

9.编写Controller

public class UserInfoController {
    @Autowired
    private IUserInfoService iUserInfoService;
    @RequestMapping("/doLogin.do")
    public String doLogin(UserInfo user, HttpSession session, HttpServletRequest request){
        UserInfo userInfo = iUserInfoService.doLogin(user);
        if (userInfo!=null){
            if (user.getPassword().equals(userInfo.getPassword())){
                session.setAttribute("user",userInfo);
                return "/main";
            }
        }
        request.setAttribute("msg","用户名密码错误");
        return "/login";
    }
}

10.测试