Spring3+Struts2+SpringJDBC注解实现 博客分类： spring spring

   个人有点侧重于性能，于是就想着把hibernate替换为JDBC，但是J2EE的jdbc还要额外的控制事物，就换成了spring容器封装好的jdbc，有不对的地方还请大家指出来，小弟在此谢过了。
   这里有两个配置文件web.xml和ApplicationContext.xml，至于Struts2的配置文件很简单就没有拿出来，还是按照常规的MVC模式。我写的大致是dao，service，action，entity。

这是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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd " default-autowire="byName" default-lazy-init="true">

<!-- 隐式地向 Spring容器注册:AutowiredAnnotationBeanPostProcessor、CommonAnnotationBeanPostProcessor、PersistenceAnnotationBeanPostProcessor、RequiredAnnotationBeanPostProcessor这 4 个BeanPostProcessor注解处理器。-->
<context:annotation-config/>

<!-- 扫描包下的类，含子包 -->
<context:component-scan base-package="com"/>

<!-- 基于命名空间的配置加载properties配置文件，Spring容器仅允许最多定义一个PropertyPlaceholderConfigurer(或<context:property-placeholder/>)，其余的会被Spring忽略掉。写多个请参照下面写法-->
<context:property-placeholder location="classpath*:*.properties"/>

<!-- 使用apache自己的dbcp数据源产品 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${driverClassName}"></property>
    <property name="url" value="${url}"></property>
    <property name="username" value="${username}"></property>
    <property name="password" value="${password}"></property>
    <property name="maxActive" value="${maxActive}"></property>
    <property name="maxIdle" value="${maxIdle}"></property>
    <property name="minIdle" value="${minIdle}"></property>  
    <property name="initialSize" value="${initialSize}"></property>
</bean>

<!-- 如果数据访问层使用jdbc来实现，请添加spring封装的jdbcTemplate模板,使用依赖注入特性注入数据源 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>

<!-- 如果数据访问层使用hibernate实现，请添加如下以用于读取hibernate配置文件作为数据源-->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocation"
value="classpath:hibernate.cfg.xml">
</property>
</bean>

<!-- 如果使用了@Transactional注解，请添加如下的JDBC事务管理器声明-->
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>

<!-- 如果使用了AOP，请使用如下事物管理器声明 -->

<tx:advice id="……" transaction-manager="……"> 
    <tx:attributes> 
            <tx:method name="*" 
                               propagation="REQUIRED" 
                               isolation="DEFAULT" 
                               timeout="-1" 
                               read-only="true" 
                               no-rollback-for=""  
                               rollback-for="java.lang.Exception"/> 
        </tx:attributes> 
    </tx:advice> 
      
    <tx:advice id="txAdvice" transaction-manager="txManager"> 
    <tx:attributes> 
               <tx:method name="save*" propagation="REQUIRED" /> 
               <tx:method name="add*" propagation="REQUIRED" /> 
               <tx:method name="create*" propagation="REQUIRED" /> 
               <tx:method name="insert*" propagation="REQUIRED" /> 
               <tx:method name="update*" propagation="REQUIRED" /> 
               <tx:method name="merge*" propagation="REQUIRED" /> 
               <tx:method name="del*" propagation="REQUIRED" /> 
               <tx:method name="remove*" propagation="REQUIRED" /> 
               <tx:method name="put*" propagation="REQUIRED" /> 
               <tx:method name="get*" propagation="SUPPORTS" read-only="true" /> 
               <tx:method name="count*" propagation="SUPPORTS" read-only="true" /> 
               <tx:method name="find*" propagation="SUPPORTS" read-only="true" /> 
               <tx:method name="list*" propagation="SUPPORTS" read-only="true" /> 
               <tx:method name="*" propagation="SUPPORTS" read-only="true" /> 
               <tx:method name="batchSaveOrUpdate" propagation="REQUIRES_NEW" /> 
           </tx:attributes> 
    </tx:advice> 
    <aop:config> 
           <aop:pointcut id="txPointcut" expression="execution(* cn.javass..service.*.*(..))" /> 
           <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut" /> 
    </aop:config> 


<!-- 这是@Transactional注解的驱动，是基于注解的方式使用事务配置声明-->
<tx:annotation-driven transaction-manager="txManager"/>


</beans>


web.xml部署描述符参数配置

<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>
 
  <filter>
<filter-name>encodingFilter</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>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
 
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <filter>
  <filter-name>struts2</filter-name>
  <filter-class>
  org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  </filter-class>
  </filter>
  <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>


在Base或者Common层的类添加不好归类的泛指组件注解：@Component
在Dao层的实现类加数据访问层注解：@Repository
在Service层的实现类加业务层注解：@Service，@Transactional
在Controller层的Action上加控制器注解：@Controller
如果是用注解而非AOP事物的情况下则使用注解：@Transactional
@Transactional(propagation=Propagation.NOT_SUPPORTED,readOnly=true)
注意这里：当在Service层标注@Transactional这个注解时默认所有的方法都开启事物，这样在性能上会打折扣同时数据库压力会越来越大，请在查询方法上添加，该注解是对查询不启用事物。



这是注解的Spring3+Struts2.1+SpringJDBC，