SpringMVC是一个MVC的流程框架,在流程处理方面更加灵活,可以很容易的进行扩展,可以和Spring框架进行无缝集成。但SpringMVC有侵入性,action需要继承框架指定的类,或者实现指定的接口。



mybatis是三层架构中数据持久层的框架,对sql进行了封装和外部化,使sql从应用程序代码中分离出来。



 



SSM 优点



  • spring3开发效率高于struts。
  • spring3 mvc可以认为是零配置。
  • spring3mvc的方法之间基本上独立的,独享requestresponse数据,方法之间不共享变量。  刚开始接触SSM框架,发现网上资料比较少,有什么不对的地方欢迎指正。
首先在web.xml里,配置mybatis和Spring MVC servlet
---------------------------------web.xml----------------------------------
<?xmlversion="1.0"encoding="UTF-8"?>
<web-appxmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <display-name>Archetype Created Web Application</display-name>
    <!-- Spring和mybatis的配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-mybatis.xml</param-value>
    </context-param>
    <!-- 编码过滤器 -->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <async-supported>true</async-supported>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- Spring监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- 防止Spring内存溢出监听器 -->
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>
 
    <!-- Spring MVC servlet -->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <!-- 此处可以可以配置成*.do,对应struts的后缀习惯 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>
    <!-- 配置SESSION超时,单位是分钟 -->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
 
</web-app>
 
 
spring-mybatis.xml 和spring-mvc.xml 需要建在SourceFolder  下,要不然路径找不到
 
----------------------------------------------------spring-mybatis.xml----------------------------------------------------
<?xmlversion="1.0"encoding="UTF-8"?>
<beansxmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                       http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
                       http://www.springframework.org/schema/context  
                       http://www.springframework.org/schema/context/spring-context-3.1.xsd  
                       http://www.springframework.org/schema/mvc  
                       http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 自动扫描 -->
    <context:component-scanbase-package="com.testSSM.test" />
    <!-- 引入配置文件 -->
    <beanid="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <propertyname="location" value="classpath:jdbc.properties"/>
    </bean>
 
    <beanid="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
        init-method="init" destroy-method="close">
        <propertyname="driverClassName" value="${driver}" />
        <propertyname="url" value="${url}"/>
        <propertyname="username" value="${username}"/>
        <propertyname="password" value="${password}"/>
        <!-- 初始化连接大小 -->
        <propertyname="initialSize" value="${initialSize}"></property>
        <!-- 连接池最大数量 -->
        <propertyname="maxActive" value="${maxActive}"></property>
        <!-- 连接池最大空闲 -->
        <propertyname="maxIdle" value="${maxIdle}"></property>
        <!-- 连接池最小空闲 -->
        <propertyname="minIdle"value="${minIdle}"></property>
        <!-- 获取连接最大等待时间 -->
        <propertyname="maxWait" value="${maxWait}"></property>
    </bean>
 
    <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 -->
    <beanid="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <propertyname="dataSource" ref="dataSource" />
        <!-- 自动扫描mapping.xml文件 -->
        <propertyname="mapperLocations" value="classpath:com/testSSM/test/mapping/*.xml"></property>
    </bean>
 
    <!-- DAO接口所在包名,Spring会自动查找其下的类 -->
    <beanclass="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <propertyname="basePackage" value="com.testSSM.test.dao" />
    <!--    <propertyname="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>   -->
    </bean>
    
    
 
    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx-->
    <beanid="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <propertyname="dataSource" ref="dataSource" />
    </bean>
 
</beans>
 
---------------------------spring-mvc.xml---------------------------
<?xmlversion="1.0"encoding="UTF-8"?>
<beansxmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                       http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
                        http://www.springframework.org/schema/context  
                       http://www.springframework.org/schema/context/spring-context-3.1.xsd  
                       http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 自动扫描该包,使SpringMVC认为包下用了@controller注解的类是控制器 -->
    <context:component-scanbase-package="com.testSSM.test.controller" />
    <!--避免IE执行AJAX时,返回JSON出现下载文件 -->
    <beanid="mappingJacksonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <propertyname="supportedMediaTypes">
            <list>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean>
    <!-- 启动SpringMVC的注解功能,完成请求和注解POJO的映射 -->
    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <propertyname="messageConverters">
            <list>
                <refbean="mappingJacksonHttpMessageConverter"/>   <!--JSON转换器 -->
            </list>
        </property>
    </bean>
    <!-- 定义跳转的文件的前后缀 ,视图模式配置-->
    <beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 -->
        <propertyname="prefix" value="/WEB-INF/jsp/"/>
        <propertyname="suffix" value=".jsp"/>
    </bean>
    
    <!-- 配置文件上传,如果没有使用文件上传可以不用配置,当然如果不配,那么配置文件中也不必引入上传组件包 -->
    <beanid="multipartResolver"  
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
        <!-- 默认编码 -->
        <propertyname="defaultEncoding"value="utf-8" />  
        <!-- 文件大小最大值 -->
        <propertyname="maxUploadSize"value="10485760000" />  
        <!-- 内存中的最大值 -->
        <propertyname="maxInMemorySize"value="40960" />  
   </bean> 
 
</beans>
 
 
 
---------------------jdbc.properties-----------------------
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
username=test
password=test
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000
  •  层级结构
•  
 
• Controller 
• Dao 
• Mapping 
• Model 
• service 


Controller

Service

Dao

Mapping

Model