一.SSM整合步奏

1.导入jar包
    Spring：
    SpringMVC
    Mybatis
    第三方的包：log4j,pageHelper,AspectJ,jackson,jstl
    mybatis-spring整合包：mybatis当中的有些对象，Spring不能处理。故需要适配包对mybatis当中的对象进行加工处理，使他可以被Spring处理

2搭建SpringMVC
    (1)web.xml:
        characterEncodingFilter:Spring编码过滤器
        HiddenHttpMethodFilter:Rest请求方式处理
        DispatcherServlet:加载SpringMVC的配置文件，默认在WEB-INF/"servlet-name"-servlet.xml，可使用init-param具体指定
    (2)Spring.xml:
        context:component-scan:控制层组件控制
        视图解析器(网络资源是图解析器：InternalResourceViewReslover)
        MVC驱动
        可选：multipartResolver文件上传，拦截器

3.Spring、SpringMVC整合
    (1)web.xml
        ContextLoaderListener:监听加载Spring配置文件
        context-param(默认在WEB-INF/applicationContext.xml)
    (2)Spring.xml
        扫描组件(排除控制层)
        事物管理
      
4.搭建mybatis
    mybatis核心配置文件
    mapper接口和mapper映射文件

5.Spring整合mybatis
    spring.xml:
        properties文件引入
        DataSource数据源配置
        事物管理器配置
        事物管理器开启
        sqlSessionFactoryBean：管理sqlSession
        mapperScannerConfigurer

1.导入jar包

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

  <modelVersion>4.0.0</modelVersion>
  <!--项目的组织，打包的时候会打包成com/xd/-->
  <groupId>com</groupId>
  <!--本项目的唯一ID-->
  <artifactId>mmall_learning</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>mmall_learning Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <!--定义常量：以便后面引用-->
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <maven.compiler.encoding>UTF-8</maven.compiler.encoding>

    <org.springframework.version>5.1.0.RELEASE</org.springframework.version>
    <org.mybatis.version>3.4.4</org.mybatis.version>
    <org.mybatis.spring.version>2.0.0</org.mybatis.spring.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.tomcat</groupId>
      <artifactId>tomcat-servlet-api</artifactId>
      <version>8.5.5</version>
    </dependency>

    <!--Spring-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-oxm</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>

    <!--Spring AOP-->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.7.3</version>
    </dependency>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjrt</artifactId>
      <version>1.6.11</version>
    </dependency>

    <!--mybatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>${org.mybatis.spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${org.mybatis.version}</version>
    </dependency>

    <!--Jackson-->
    <!-- https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-mapper-asl -->
    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-mapper-asl</artifactId>
      <version>1.9.13</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.4</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.4</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.9.4</version>
    </dependency>

    <!--
      数据库连接池:DBCP、c3p0,此处使用的是DBCP,单独使用的时候需要用到以下的三个包，在maven中使用，由于依赖自动导入，无需手动commons-pool
      commons-dbcp：dbcp的实现
      commons-collections:对集合类的常用封装，在数据库连接的时候会用到集合
      commons-pool:
    -->
    <!--
    <dependency>
      <groupId>commons-pool</groupId>
      <artifactId>commons-pool</artifactId>
      <version>1.6</version>
    </dependency>
    -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
      <!--<scope>runtime</scope>-->
    </dependency>
    <dependency>
      <groupId>commons-collections</groupId>
      <artifactId>commons-collections</artifactId>
      <version>3.2.1</version>
    </dependency>
    <!--mybatis驱动包-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.6</version>
    </dependency>

    <!--日志-->
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.1.2</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-core</artifactId>
      <version>1.1.2</version>
      <scope>compile</scope>
    </dependency>

    <!--对常用工具包String，Date等等进行了封装，可以更加方便好用,上一版lang已弃用-->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
      <version>3.5</version>
    </dependency>

    <!--google的Guava:防止表单的重复提交,通过Token实现-->
    <dependency>
      <groupId>com.google.guava</groupId>
      <artifactId>guava</artifactId>
      <version>20.0</version>
    </dependency>

    <!--日期类管理：比jdk自带的简单很多-->
    <dependency>
      <groupId>joda-time</groupId>
      <artifactId>joda-time</artifactId>
      <version>2.3</version>
    </dependency>

    <!-- id加密解密：盐值salt的管理 -->
    <dependency>
      <groupId>org.hashids</groupId>
      <artifactId>hashids</artifactId>
      <version>1.0.1</version>
    </dependency>

    <!-- ftpclient：网络传输 -->
    <dependency>
      <groupId>commons-net</groupId>
      <artifactId>commons-net</artifactId>
      <version>3.1</version>
    </dependency>

    <!-- file upload -->
    <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.2.2</version>
    </dependency>
    <!--文件上传的时候：需要读取配置文件以流的形式-->
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.0.1</version>
    </dependency>

    <!-- mybatis pager -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>4.1.0</version>
    </dependency>
    <dependency>
      <groupId>com.github.miemiedev</groupId>
      <artifactId>mybatis-paginator</artifactId>
      <version>1.2.17</version>
    </dependency>
    <dependency>
      <groupId>com.github.jsqlparser</groupId>
      <artifactId>jsqlparser</artifactId>
      <version>0.9.4</version>
    </dependency>

    <!-- alipay -->
    <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>1.10</version>
    </dependency>
    <dependency>
      <groupId>commons-configuration</groupId>
      <artifactId>commons-configuration</artifactId>
      <version>1.10</version>
    </dependency>
    <!--<dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>2.6</version>
    </dependency>-->
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1.1</version>
    </dependency>
    <dependency>
      <groupId>com.google.zxing</groupId>
      <artifactId>core</artifactId>
      <version>2.1</version>
    </dependency>
    <dependency>
      <groupId>com.google.code.gson</groupId>
      <artifactId>gson</artifactId>
      <version>2.3.1</version>
    </dependency>
    <dependency>
      <groupId>org.hamcrest</groupId>
      <artifactId>hamcrest-core</artifactId>
      <version>1.3</version>
    </dependency>

    <!--redis客户端:jedis-->
    <dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
      <version>2.9.0</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>mmall_learning</finalName>
    <plugins>
      <plugin>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-maven-plugin</artifactId>
        <version>1.3.2</version>
        <configuration>
          <verbose>true</verbose>
          <overwrite>true</overwrite>
        </configuration>
      </plugin>
      <!--
        maven的核心插件之-complier插件
        默认只支持编译Java 1.4，因此需要加上支持高版本jre的配置，在pom.xml里面加上 增加编译插件
      -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
          <encoding>UTF-8</encoding>
          <compilerArguments>
            <extdirs>${project.basedir}/src/main/webapp/WEB-INF/lib</extdirs>
          </compilerArguments>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-clean-plugin</artifactId>
        <version>3.1.0</version>
      </plugin>
      <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
      <plugin>
        <artifactId>maven-resources-plugin</artifactId>
        <version>3.0.2</version>
      </plugin>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
      </plugin>
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.22.1</version>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>3.2.2</version>
      </plugin>
      <plugin>
        <artifactId>maven-install-plugin</artifactId>
        <version>2.5.2</version>
      </plugin>
      <plugin>
        <artifactId>maven-deploy-plugin</artifactId>
        <version>2.8.2</version>
      </plugin>
    </plugins>
  </build>
</project>

2.搭建SpringMVC

********************WEB-INF/dispatcher-servlet.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:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc" 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/context http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--扫描Controller层组件-->
    <context:component-scan base-package="com.mall.controller" />

    <!--MVC驱动:扫描SpringMVC组件，替代HandlerMapper和HandlerAdapter的配置使注解@RequestMapping,@RequestParam,@ExceptionHandler生效-->
    <mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/plain;charset=UTF-8</value>
                        <value>text/html;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
            <!--通过在MVC驱动的message-converters里面bean调用Jackson的converter，使其返回的数据类型为application/json-->
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

    <!-- 文件上传 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="10485760"/> <!-- 10m -->
        <property name="maxInMemorySize" value="4096" />
        <property name="defaultEncoding" value="UTF-8" />
    </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"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         id="WebApp_ID" version="2.5">

  <display-name>Archetype Created Web Application</display-name>
  <!--Spring编码过滤器设置编码集为UFT-8-->
  <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>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!--Rest请求方式处理：处理put/delete-->
  <filter>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!--监听web容器的启动和关闭-->
  <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>

  <!--web容器和Spring容器整合的监听器：ContextLoaderListener通过指定的Spring配置文件将Spring配置文件加载进来实现在web容器当中启动Spring容器-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--如果只配置了监听器ContextLoaderListener未配置context-param则默认Spring配置文件在WEB-INF/applicationContext.xml-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
      classpath:applicationContext.xml
    </param-value>
  </context-param>

  <!--SpringMVC的配置文件，所有的*.do请求都会被拦截-->
  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--默认在WEB-INF下，名字是"servlet-name"-servlet.xml,比如本例当中是dispatcher-servlet.xml
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>WEB-INF/xxx</param-value>
    </init-param>
    -->
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

</web-app>

3.Spring、mybatis整合

*********************applicationContext.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"
       xsi:schemaLocation="
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
     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">

    <!--Spring希望管理所有的业务组件，SpringMVC管理控制器组件，annotation-config：让系统可以识别一些注解-->
    <context:component-scan base-package="com.mall" annotation-config="true" >
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <!--Spring 用来控制业务逻辑，数据源、事物控制、aop-->
    <aop:aspectj-autoproxy/>


    <import resource="applicationContext-datasource.xml"/>

    <!--Spring整合mybatis的目的:Spring管理所有的组件，管理mapper实现类，管理事物
            然后当service调用dao的时候，只需使用@Autowired即可以实现自动注入mapper
    -->

</beans>
*********************applicationContext-datasource.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:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
       xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
     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 http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd">

    <!--Spring整合mybatis的目的:Spring管理所有的组件，管理mapper实现类，管理事物
            然后当service调用dao的时候，只需使用@Autowired即可以实现自动注入mapper
    -->

    <bean id="propertyConfigurer"
          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="order" value="2"/>
        <property name="ignoreUnresolvablePlaceholders" value="true"/>
        <property name="locations">
            <list>
                <value>classpath:datasource.properties</value>
            </list>
        </property>
        <property name="fileEncoding" value="utf-8"/>
    </bean>


    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${db.driverClassName}"/>
        <property name="url" value="${db.url}"/>
        <property name="username" value="${db.username}"/>
        <property name="password" value="${db.password}"/>
        <!-- 连接池启动时的初始值 -->
        <property name="initialSize" value="${db.initialSize}"/>
        <!-- 连接池的最大值 -->
        <property name="maxActive" value="${db.maxActive}"/>
        <!-- 最大空闲值.当经过一个高峰时间后，连接池可以慢慢将已经用不到的连接慢慢释放一部分，一直减少到maxIdle为止 -->
        <property name="maxIdle" value="${db.maxIdle}"/>
        <!-- 最小空闲值.当空闲的连接数少于阀值时，连接池就会预申请去一些连接，以免洪峰来时来不及申请 -->
        <property name="minIdle" value="${db.minIdle}"/>
        <!-- 最大建立连接等待时间。如果超过此时间将接到异常。设为－1表示无限制 -->
        <property name="maxWait" value="${db.maxWait}"/>
        <!--#给出一条简单的sql语句进行验证 -->
        <!--<property name="validationQuery" value="select getdate()" />-->
        <property name="defaultAutoCommit" value="${db.defaultAutoCommit}"/>
        <!-- 回收被遗弃的（一般是忘了释放的）数据库连接到连接池中 -->
        <!--<property name="removeAbandoned" value="true" />-->
        <!-- 数据库连接过多长时间不用将被视为被遗弃而收回连接池中 -->
        <!--<property name="removeAbandonedTimeout" value="120" />-->
        <!-- #连接的超时时间，默认为半小时。 -->
        <property name="minEvictableIdleTimeMillis" value="${db.minEvictableIdleTimeMillis}"/>

        <!--# 失效检查线程运行时间间隔，要小于MySQL默认-->
        <property name="timeBetweenEvictionRunsMillis" value="40000"/>
        <!--# 检查连接是否有效-->
        <property name="testWhileIdle" value="true"/>
        <!--# 检查连接有效性的SQL语句-->
        <property name="validationQuery" value="SELECT 1 FROM dual"/>
    </bean>


    <!--SqlSessionFactoryBean实现了FactoryBean：会创建出sqlSessionFactory
        相当于让Spring的IOC容器一启动就代替我们自己去创建sqlSessionFactory，我们自己手动创建是十分低效的
    -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--指定mapper文件的位置-->
        <property name="mapperLocations" value="classpath*:mappers/PayInfoMapper.xml" />
        <!--
        这个属性configLocation是用来指定全局配置文件的位置，即可以配置原来mybatis-conf.xml
        <property name="configLocation" value="" />
        -->
        <!-- 分页插件 -->
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageHelper">
                    <property name="properties">
                        <value>
                            dialect=mysql
                        </value>
                    </property>
                </bean>
            </array>
        </property>

    </bean>



    <!--类似于Spring的autowired:将该包下的所有mapper接口通过动态代理统一生成动态代理实现类，此时就无需创建mapper对象，因为Spring已经创建好了，此时直接在service当中调用即可-->
    <bean name="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.mmall.dao"/>
    </bean>

    <!--扫描所有mapper接口实现的新方式
    <mybatis-spring:scan base-package="com.mmall.dao" />
    -->



    <!-- Spring事务管理：事物管理器DataSourceTransactionManager管理数据库dataSource的事物 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
        <property name="rollbackOnCommitFailure" value="true"/>
    </bean>
    <!-- 开启基于注解的事物:使用@Transactional进行声明式事务管理需要声明下面这行 -->
    <tx:annotation-driven transaction-manager="transactionManager" />

</beans>