spring mvc+mybatis+ spring 基于全注解事务配置

今天药忘吃喽~ 2024-02-17 17:15 41阅读 0赞

spring mvc 自动扫描注解时，不需要扫描@Service

<context:component-scan base-package="com.wlsq">     	
        	<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service" />  
    	</context:component-scan>

spring 自动扫描时，不需要扫描@Controller,并开启事务注解机制

<tx:annotation-driven />    
                          
         <context:component-scan base-package="com.wlsq">
        	<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> 
    	 </context:component-scan>

重点：

Spring MVC启动时的配置文件，包含组件扫描、url映射以及设置freemarker参数，让spring不扫描带有@Service注解的类。为什么要这样设置？因为servlet-context.xml与service-context.xml不是同时加载，如果不进行这样的设置，那么，spring就会将所有带@Service注解的类都扫描到容器中，等到加载service-context.xml的时候，会因为容器已经存在Service类，使得cglib将不对Service进行代理，直接导致的结果就是在service-context中的事务配置不起作用，发生异常时，无法对数据进行回滚。

项目配置源文件

spring-mvc.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"
    	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-3.1.xsd">
    
    
    	
    	<mvc:annotation-driven />
    	<mvc:default-servlet-handler />
    	<context:annotation-config />
    	
    	  
    	<context:component-scan base-package="com.wlsq">     	
        	<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service" />  
    	</context:component-scan>
    
    	
    	<mvc:resources location="/js/" mapping="/js/**" />
    	<mvc:resources location="/images/" mapping="/images/**" />
    	<mvc:resources location="/css/" mapping="/css/**" />
    	<mvc:resources location="/common/" mapping="/common/**" />
    	
    	<bean id="mappingJacksonHttpMessageConverter"
    		class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
    	</bean>
    	
    	<bean id="stringConverter"
    		class="org.springframework.http.converter.StringHttpMessageConverter">
    		<property name="supportedMediaTypes">
    			<list>
    				<value>text/html;charset=UTF-8</value>
    			</list>
    		</property>
    	</bean>
    	
    	<bean
    		class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    		<property name="messageConverters">
    			<list>
    				<ref bean="mappingJacksonHttpMessageConverter" />	
    				<ref bean="stringConverter" />
    			</list>
    		</property>
    	</bean>
    	
    	<bean
    		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    		
    		<property name="prefix" value="/backstage/jsp/" />
    		<property name="suffix" value=".jsp" />
    		
    	</bean>
    
    	
    
    
    
    
    	
    	<bean id="multipartResolver"
    		class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    		
    		<property name="defaultEncoding" value="utf-8" />
    		
    		<property name="maxUploadSize" value="10485760000" />
    		
    		<property name="maxInMemorySize" value="40960" />
    	</bean>
    
    
    
    
    
    
    
    
    
    
    </beans>

spring-mybatis.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: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-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/tx
                            http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
                            http://www.springframework.org/schema/aop 
                            http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
                            http://www.springframework.org/schema/mvc  
                            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
                            
        
            
          <tx:annotation-driven />    
                          
         <context:component-scan base-package="com.wlsq">
        	<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> 
    	 </context:component-scan>
    	
    	
    	<bean id="propertyConfigurer"
    		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    		<property name="location" value="classpath:jdbc.properties" />
    	</bean>
    		
    	 <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> 
          
          <property name="url" value="${url}" />
          <property name="username" value="${username}" />
          <property name="password" value="${password}" />
    
          
          <property name="initialSize" value="1" />
          <property name="minIdle" value="1" /> 
          <property name="maxActive" value="20" />
    
          
          <property name="maxWait" value="60000" />
    
          
          <property name="timeBetweenEvictionRunsMillis" value="60000" />
    
          
          <property name="minEvictableIdleTimeMillis" value="300000" />
    
          <property name="validationQuery" value="SELECT 'x'" />
          <property name="testWhileIdle" value="true" />
          <property name="testOnBorrow" value="false" />
          <property name="testOnReturn" value="false" />
    
          
          <property name="poolPreparedStatements" value="true" />
          <property name="maxPoolPreparedStatementPerConnectionSize" value="20" />
    
          
          <property name="filters" value="stat" /> 
      </bean>
    	
    
    	
    	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    		<property name="dataSource" ref="dataSource" />
    		
    		<property name="mapperLocations" value="classpath:com/wlsq/mapper/*.xml"></property>
    	</bean>
    
    	
    	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    		<property name="basePackage" value="com.wlsq.dao" />
    		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    	</bean>
    
    	
    	<bean id="transactionManager"
    		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    		<property name="dataSource" ref="dataSource" />
    	</bean>
    	
    	
    
    </beans>

我的事务管理主要集中在：service 层进行控制

@Transactional(readOnly = false,propagation=Propagation.REQUIRED)  
    	@Override
    	public int insert(User record) {
    		// TODO Auto-generated method stub
    		int j=this.userMapper.insert(record);
    		int i = 1/0;;
    		return j;
    	}

事务的配置规则：以方法名进行甄别(规则如下)