springmvc+spring+MyBatis整合（SSM）

①、在pom.xml文件添加：

        <!--MyBatis的依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>
        <!--MySQL的依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.43</version>
        </dependency>
        <!--SpringMVC的依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--spring连接数据库的依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--spring配置切面的依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--spring的上下文的依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--Spring和MyBatis和整合依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!--C3p0的依赖-->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.1</version>
        </dependency>
        <!--servlet的依赖-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.0</version>
            <scope>provided</scope>
        </dependency>

②、springmvc配置文件和整合配置文件
1、springmvc.xml

 <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
       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
">

    <mvc:annotation-driven/>

    <context:component-scan base-package="com.xb"/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="suffix" value=".jsp"/>
        <property name="prefix" value="/"/>
    </bean>
    
</beans>

2、applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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
">

    <!--数据源配置-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?characterEncoding=utf-8" />
        <property name="password" value="123456"/>
        <property name="user" value="root"/>
        <property name="initialPoolSize" value="3"/>
        <property name="maxPoolSize" value="10"/>
    </bean>

    <!--配置Mybatis的sessionFactory-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sessionFactory">
        <property name="dataSource" ref="dataSource"></property>
        <property name="typeAliasesPackage" value="com.xb.model"/>
        <property name="mapperLocations" value="classpath:com/xb/model/*.xml"/>
    </bean>

    <!--配置事务管理器-->
    <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="transactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!--mapper的扫描-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.xb.mapper"/>
    </bean>

    <!--配置在当前项目中哪些方法需要事务管理-->
    <tx:advice transaction-manager="transactionManager" id="TxAdvice">
        <tx:attributes>
            <tx:method name="sql*" propagation="REQUIRED"/>
            <tx:method name="*" read-only="true"/>
        </tx:attributes>
    </tx:advice>

    <!--切入点配置-->
    <aop:config>
        <aop:pointcut id="pointcut" expression="execution(* com.xb.service.impl.*.*(..))"/>
        <aop:advisor advice-ref="TxAdvice" pointcut-ref="pointcut"/>
    </aop:config>
</beans>

③、web.xml添加

<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>

  <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:springmvc.xml</param-value>
    </init-param>
  </servlet>

  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

④、创建service接口包
实现service接口并写出需要使用的方法，实例如下。

@Service//写出来准没错,不写controller注入是会报错（在mapper接口也写一个）
public class UserServiceImpl implements UserService {

	//注入对应的mapper接口
    @Autowired
    private UserMapper mapper;

	//实现需要使用的方法
    @Override
    public List<User> select() {
        return mapper.select();
    }
}

⑤、在controller注入service接口并调用测试！！！