优秀文章

博客：
shu_lin > SSM框架——详细整合教程（Spring+SpringMVC+MyBatis）
水滴娃娃 > 如何用Maven创建web项目（具体步骤）

说明

• 此篇文章对接我的上一篇文章“MAVEN建站”；
• 框架的整合在网上可以找到很多相关参考文档，本文也是经过多方参考加上本人亲身实践整理出来结果，可能在操作步骤与配置选择上与他人存在差异，若有读者对此存在疑问请自行取舍或者与我联系交流；

相关框架

• Spring
• Spring是一个开源框架，Spring是于2003 年兴起的一个轻量级的Java 开发框架，由Rod Johnson创建。——百度百科（Spring）
• Spring是一个容器，它利用Java的反射机制实现对象的动态生产，并根据配置文件来建立容器内对象之间的依赖关系，这种控制权由对象转向容器的模式就是Spring的核心——IOC。
• Spring的另一个核心：面向切面编程（AOP）；
• SpringMVC
• SpringMVC是一个基于DispatcherServlet的MVC框架，所以SpringMVC的核心配置就是在web.xml中配置拦截请求的Servlet，配置好之后匹配的请求到达后台就都会给DispatcherServlet拦截并转发给对应的处理器，这里所提到的处理器就是基于SpringMVC提供注解（@Controller）注释的Controller，处理器接收请求之后会根据请求匹配对应的处理方法，这里处理请求的实际操作方法也是由SpringMVC提供的注解（@RequestMapping）所注释好的，@RequestMapping会给所注释的方法设置映射值，若请求与注释上设置的值一致，则完成匹配并接受处理，最后返回处理结果，关于返回结果详情可以参考这里；
• MyBatis
• 半自动化的数据持久层框架；

项目整合

• 引入jar包，在项目的pom.xml文件添加对应jar包信息：
  本例只列出SSM所需jar，内容也非完整pom内容，切勿直接copy使用

    <properties>
        <spring.version>4.2.5.RELEASE</spring.version>
        <mybatis.version>3.3.1</mybatis.version>
        <jackson.version>2.6.3</jackson.version>
        <aspectj.version>1.8.8</aspectj.version>
    </properties>

    <dependencies>
        <!-- spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <!-- spring and mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.2.4</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        
        <!-- mybatis-->
        <dependency>  
            <groupId>org.mybatis</groupId>  
            <artifactId>mybatis</artifactId>  
            <version>${mybatis.version}</version>  
        </dependency>  
        
        <!-- Other -->
        <!-- aop -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>${aspectj.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>${aspectj.version}</version>
        </dependency>
        
        <!-- db -->
        <!-- mysql
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.30</version>
        </dependency>
        -->

        <!-- oracle
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.2.0.3</version>
        </dependency>
        -->
        
    </dependencies>

• 创建配置文件来实现框架的搭建与整合（注意web.xml所填路径必须与框架配置文件所在位置保持一致）：
  • 修改web.xml文件实现框架的搭建：
    以下内容非完整web.xml内容，切勿直接copy使用

    <!-- spring-mybatis -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:config/spring.xml;
            classpath:config/spring-mybatis.xml
        </param-value>
    </context-param>
    
    <!-- spring -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- 防止spring内存溢出监听器，未证实 -->
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>
    
    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>
    
    <!-- spring mvc -->
    <servlet>
        <servlet-name>spring mvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:config/spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>spring mvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

• spring.xml内容如下：

<?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:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
    <description>Spring Configuration</description>
    
    <!-- 启动对@AspectJ注解的支持 -->
    <aop:aspectj-autoproxy/>
    
    <!-- 扫描指定包下的类，注册组件 -->
    <context:component-scan base-package="com.*.**" use-default-filters="false">
        <!-- 注册@Aspect注解的切面 -->
        <context:include-filter type="annotation" expression="org.aspectj.lang.annotation.Aspect"/>
        <!-- 注册@Service注解的服务 -->
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Service"/>
    </context:component-scan>
</beans>

• spring-mvc.xml内容如下：

<?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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
    <description>Spring MVC Configuration</description>
    
    <!-- 代理，实现controller层的aop -->
    <aop:aspectj-autoproxy proxy-target-class="true" />
    
    <!-- 扫描指定包下的类，注册组件 -->
    <context:component-scan base-package="com.*.**" use-default-filters="false">
        <!-- 注册@Controller注解的控制器 -->
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    
    <!-- 启用注解驱动 -->
    <mvc:annotation-driven>
        <mvc:message-converters>
            <ref bean="mappingJacksonHttpMessageConverter" />
        </mvc:message-converters>
    </mvc:annotation-driven>
    
    <bean id="mappingJacksonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
        <property name="objectMapper">
            <bean class="com.fasterxml.jackson.databind.ObjectMapper">
                <property name="serializationInclusion">
                    <value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value>
                </property>
            </bean>
        </property>
    </bean>
</beans>

• spring-mybatis.xml内容如下：

<?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:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    
    <description>Mybatis Configuration</description>
    
    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:config/database/jdbc.properties" />
        <!-- 多个配置用下面的方法-->
        <!--
        <property name="locations">
            <list>
                <value>classpath:config/database/jdbc.properties</value>
            </list>
        </property> -->
    </bean>
    
    <!-- 数据源，这里的配置与jdbc.properties中的内容需匹配 -->
    <bean name="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="${jdbc_driverClassName}" />
        <property name="url" value="${jdbc_url}" />
        <property name="username" value="${jdbc_username}" />
        <property name="password" value="${jdbc_password}" />
        <property name="maxActive" value="${jdbc_maxActive}"/>
        <property name="maxIdle" value="${jdbc_maxIdle}"/>
        <property name="testOnBorrow" value="${jdbc_testOnBorrow}"/>
    </bean>
    
    <!-- spring与Mybatis映射 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="mapperLocations" value="classpath:mapper/**/*.xml" />
    </bean>
    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.zhaohua.**.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>
    
    <!-- 事务 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="delete*" propagation="REQUIRED" read-only="false" rollback-for="java.lang.Exception" />
            <tx:method name="insert*" propagation="REQUIRED" read-only="false" rollback-for="java.lang.Exception" />
            <tx:method name="update*" propagation="REQUIRED" read-only="false" rollback-for="java.lang.Exception" />
        </tx:attributes>
    </tx:advice>
    <!-- 使用切面将事物逻辑织入方法 -->
    <aop:config>
        <aop:pointcut id="servicePointcut" expression="execution(public * com.*.*.service..*.*(..))" />
        <aop:advisor pointcut-ref="servicePointcut" advice-ref="txAdvice" />
    </aop:config>
</beans>

• jdbc.properties内容如下（<<xx>>部分内容需根据实际情况替换）：

jdbc_driverClassName=<<driver>>
validationQuery=SELECT 1
jdbc_url=<<url>>
jdbc_username=<<username>>
jdbc_password=<<password>>
jdbc_maxActive=150
jdbc_maxIdle=5
jdbc_testOnBorrow=true

最后

• 以上的所有配置，均可按照实际情况选择修改。