springMVC多数据源使用 跨库跨连接

转载自：http://blog.csdn.net/a973893384/article/details/21460121

有的时候项目中可能要从另外一个系统取数据  如果另外一个系统能提供接口就很好解决 如果没有接口 便可以配置多个数据源切换访问

<1>:这是数据源和事务扫描注入的配置 访问多个数据源只需要建立多个数据源和事务这一套配置文件

这是第一个数据源

<?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:context="http://www.springframework.org/schema/context"xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsdhttp://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsdhttp://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsdhttp://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"default-lazy-init="true"><description>Spring公共配置 </description>    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations">            <list>                <value>classpath:resources.properties</value>                <!--  <value>classpath:memcached.properties</value> -->            </list>        </property>    </bean>        <!-- dubbo配置 -->    <!-- <dubbo:application name="xaUserRegPro" />    <dubbo:registry address="multicast://" />    <dubbo:reference id="userRegProService" interface="com.xinnet.xa.service.UserRegProService"  timeout="6000"/> -->     <!-- **************** druid 监控连接池配置 ***************** --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"><!-- 基本属性 url、user、password --><property name="url" value="${url}" /><property name="username" value="${username}" /><property name="password" value="${password}" /><!-- 配置初始化大小、最小、最大 --><property name="initialSize" value="${initialSize}" /><property name="minIdle" value="${minIdle}" /><property name="maxActive" value="${maxActive}" /><!-- 配置获取连接等待超时的时间 --><property name="maxWait" value="${maxWait}" /><!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 --><property name="timeBetweenEvictionRunsMillis" value="60000" /><!-- 配置一个连接在池中最小生存的时间，单位是毫秒 --><property name="minEvictableIdleTimeMillis" value="300000" /><property name="validationQuery" value="SELECT 'x'" /><property name="testWhileIdle" value="true" /><property name="testOnBorrow" value="false" /><property name="testOnReturn" value="false" /><!-- 打开PSCache，并且指定每个连接上PSCache的大小  --><!-- 如果用Oracle，则把poolPreparedStatements配置为true，mysql可以配置为false。分库分表较多的数据库，建议配置为false --><property name="poolPreparedStatements" value="${poolPreparedStatements}" /><property name="maxPoolPreparedStatementPerConnectionSize" value="20" /><!-- 对泄漏的连接 自动关闭 --><property name="removeAbandoned" value="${removeAbandoned}" /> <!-- 打开removeAbandoned功能 -->   <property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}" /> <!-- 1800秒，也就是30分钟 -->        <property name="logAbandoned" value="${logAbandoned}" /> <!-- 关闭abanded连接时输出错误日志 -->        <!-- 配置监控统计拦截的filters --><property name="filters" value="mergeStat" /><!--  <property name="filters" value="stat" /> --><!-- 慢日志查询  缺省为3秒  修改为10秒 10000 --><property name="connectionProperties" value="druid.stat.slowSqlMillis=5000" /><!-- DruidDataSource各自独立 ， 支持配置公用监控数据 --><!-- <property name="useGloalDataSourceStat" value="true" /> --></bean><!-- druid 监控  spring  --><bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor"/><bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype"><property name="patterns"><list><value>com.xinnet.*.service.*</value></list></property></bean><aop:config><aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" /></aop:config><!-- MyBatis Mapper.XMl 配置 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource" />    <property name="configLocation" value="classpath:config/mybatis.xml" />    <property name="mapperLocations"><list><!-- 自动匹配Mapper映射文件  --><value>classpath:mapper/**/*-mapper.xml</value></list></property><!-- 添加插件 -->        <property name="plugins">    <array><ref bean="pagePlugin" /></array>    </property></bean><!-- 支持文件上传相关 --><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/><!-- 分页插件，根据方言自动添加分页信息，默认要求 --><bean id="pagePlugin" class="com.xinnet.core.mybatis.plugin.PagePlugin"><property name="properties"><props><prop key="dialect">com.xinnet.core.mybatis.dialet.MySQLDialect</prop><prop key="pageSqlId">.*query.*</prop></props></property></bean><!-- redis客户端 --> <!-- jedis pool配置  -->      <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">          <property name="maxActive" value="${redis.maxActive}" />          <property name="maxIdle" value="${redis.maxIdle}" />          <property name="maxWait" value="${redis.maxWait}" />          <property name="testOnBorrow" value="${redis.testOnBorrow}" />      </bean>          <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">          <property name="usePool" value="true"></property>          <property name="hostName" value="${redis.host}" />          <property name="port" value="${redis.port}" />          <property name="password" value="${redis.pass}" />          <property name="timeout" value="${redis.timeout}" />          <property name="database" value="${redis.default.db}"></property>          <constructor-arg index="0" ref="jedisPoolConfig" />      </bean>  <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">          <property name="connectionFactory" ref="jedisConnectionFactory" />      </bean>       <!-- ***************事务配置************** -->    <tx:annotation-driven transaction-manager="transactionManager"/><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean>  <aop:config>               <aop:advisor pointcut="execution(* com.xinnet..service..*.*(..))"  advice-ref="txAdvice" />      </aop:config>      <tx:advice id="txAdvice" transaction-manager="transactionManager">          <tx:attributes>              <tx:method name="get*" read-only="true" />              <tx:method name="query*" read-only="true" />              <tx:method name="find*" read-only="true" />              <tx:method name="load*" read-only="true" />            <tx:method name="select*" read-only="true" />             <tx:method name="count*" read-only="true" />              <tx:method name="search*" read-only="true" />              <tx:method name="list*" read-only="true" />              <tx:method name="*" propagation="REQUIRED" rollback-for="Exception" />          </tx:attributes>      </tx:advice>      <aop:aspectj-autoproxy proxy-target-class="true"/>      <!-- 开启注解事务 只对当前配置文件有效 -->      <!-- 扫描注解Bean -->    <context:component-scan base-package="com.xinnet">        <context:include-filter type="annotation" expression="org.springframework.stereotype.Repository"/>          <context:include-filter type="annotation" expression="org.springframework.stereotype.Service"/>        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>    </context:component-scan>     <!-- 隐式地向 Spring 容器注册 --><context:annotation-config/> </beans>

<2>这是第二个数据源 和第一个数据源一样 需要有事务 扫描注解
 不同的是数据源的 url  username 和password 用的是第二个数据源的连接  用户名和密码

<?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:context="http://www.springframework.org/schema/context"xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsdhttp://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsdhttp://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsdhttp://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"default-lazy-init="true"><description>Spring公共配置 </description>    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations">            <list>                <value>classpath:resources.properties</value>                <!--  <value>classpath:memcached.properties</value> -->            </list>        </property>    </bean>     <!-- **************** druid 监控连接池配置 *****************  --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"><!-- 基本属性 url、user、password --><property name="url" value="${url2}" /><property name="username" value="${username2}" /><property name="password" value="${password2}" /><!-- 配置初始化大小、最小、最大 --><property name="initialSize" value="${initialSize}" /><property name="minIdle" value="${minIdle}" /><property name="maxActive" value="${maxActive}" /><!-- 配置获取连接等待超时的时间 --><property name="maxWait" value="${maxWait}" /><!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 --><property name="timeBetweenEvictionRunsMillis" value="60000" /><!-- 配置一个连接在池中最小生存的时间，单位是毫秒 --><property name="minEvictableIdleTimeMillis" value="300000" /><property name="validationQuery" value="SELECT 'x'" /><property name="testWhileIdle" value="true" /><property name="testOnBorrow" value="false" /><property name="testOnReturn" value="false" /><!-- 打开PSCache，并且指定每个连接上PSCache的大小  --><!-- 如果用Oracle，则把poolPreparedStatements配置为true，mysql可以配置为false。分库分表较多的数据库，建议配置为false --><property name="poolPreparedStatements" value="${poolPreparedStatements}" /><property name="maxPoolPreparedStatementPerConnectionSize" value="20" /><!-- 对泄漏的连接 自动关闭 --><property name="removeAbandoned" value="${removeAbandoned}" /> <!-- 打开removeAbandoned功能 -->   <property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}" /> <!-- 1800秒，也就是30分钟 -->        <property name="logAbandoned" value="${logAbandoned}" /> <!-- 关闭abanded连接时输出错误日志 -->        <!-- 配置监控统计拦截的filters --><property name="filters" value="mergeStat" /><!--  <property name="filters" value="stat" /> --><!-- 慢日志查询  缺省为3秒  修改为10秒 10000 --><property name="connectionProperties" value="druid.stat.slowSqlMillis=5000" /><!-- DruidDataSource各自独立 ， 支持配置公用监控数据 --><!-- <property name="useGloalDataSourceStat" value="true" /> --></bean><!-- druid 监控  spring  --><bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor"/><bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype"><property name="patterns"><list><value>com.xinnet.*.service.*</value></list></property></bean><aop:config><aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" /></aop:config><!-- MyBatis Mapper.XMl 配置 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource" />    <property name="configLocation" value="classpath:config/mybatis.xml" />    <property name="mapperLocations"><list><!-- 自动匹配Mapper映射文件  --><value>classpath:mapper/**/*-mapper.xml</value></list></property><!-- 添加插件 -->        <property name="plugins">    <array><ref bean="pagePlugin" /></array>    </property></bean><!-- 支持文件上传相关 --><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/><!-- 分页插件，根据方言自动添加分页信息，默认要求 --><bean id="pagePlugin" class="com.xinnet.core.mybatis.plugin.PagePlugin"><property name="properties"><props><prop key="dialect">com.xinnet.core.mybatis.dialet.MySQLDialect</prop><prop key="pageSqlId">.*query.*</prop></props></property></bean><!-- redis客户端 --> <!-- jedis pool配置  -->      <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">          <property name="maxActive" value="${redis.maxActive}" />          <property name="maxIdle" value="${redis.maxIdle}" />          <property name="maxWait" value="${redis.maxWait}" />          <property name="testOnBorrow" value="${redis.testOnBorrow}" />      </bean>          <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">          <property name="usePool" value="true"></property>          <property name="hostName" value="${redis.host}" />          <property name="port" value="${redis.port}" />          <property name="password" value="${redis.pass}" />          <property name="timeout" value="${redis.timeout}" />          <property name="database" value="${redis.default.db}"></property>          <constructor-arg index="0" ref="jedisPoolConfig" />      </bean>  <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">          <property name="connectionFactory" ref="jedisConnectionFactory" />      </bean>       <!-- ***************事务配置************** -->    <tx:annotation-driven transaction-manager="transactionManager"/><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean>  <aop:config>               <aop:advisor pointcut="execution(* com.xinnet..service..*.*(..))"  advice-ref="txAdvice" />      </aop:config>      <tx:advice id="txAdvice" transaction-manager="transactionManager">          <tx:attributes>              <tx:method name="get*" read-only="true" />              <tx:method name="query*" read-only="true" />              <tx:method name="find*" read-only="true" />              <tx:method name="load*" read-only="true" />            <tx:method name="select*" read-only="true" />             <tx:method name="count*" read-only="true" />              <tx:method name="search*" read-only="true" />              <tx:method name="list*" read-only="true" />              <tx:method name="*" propagation="REQUIRED" rollback-for="Exception" />          </tx:attributes>      </tx:advice>      <aop:aspectj-autoproxy proxy-target-class="true"/>      <!-- 开启注解事务 只对当前配置文件有效 -->      <!-- 扫描注解Bean -->    <context:component-scan base-package="com.xinnet">        <context:include-filter type="annotation" expression="org.springframework.stereotype.Repository"/>          <context:include-filter type="annotation" expression="org.springframework.stereotype.Service"/>        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>    </context:component-scan>     <!-- 隐式地向 Spring 容器注册 --><context:annotation-config/> </beans>

<3>这个时候就可以用两个数据源进行切换注入 从而使用不同数据源的service

这是service里面的方法 该怎么写就是怎么写 该怎么注解就怎么注解 不用做特殊的步骤 

@Service("partyService")public class PartyServiceImpl implements PartyService {@Autowiredprivate PartyDao partyDao;@Overridepublic List<Emp> getAllEmp() throws SQLException {return partyDao.getAllEmp();}}

Dao层也是一样 该怎么写就怎么写 该怎么注解就怎么注解

然后可以写一个测试类试一下连接

@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations = { "classpath:spring.xml" })//这里的spring.xml加载了第一个数据源 spring-commons.xml public class DataSourceTest extends AbstractTransactionalJUnit4SpringContextTests {/** *  * 功能描述：xxxxx * * @throws SQLException * * @author xxx[[e-mail]] * * @since 2014年3月12日 * * @update:[变更日期YYYY-MM-DD][更改人姓名][变更描述] */@Test@Rollback(true)public void testGetAllEmp() throws SQLException {ApplicationContext ac = new FileSystemXmlApplicationContext("classpath:config/hymanager/hymanager_spring.xml");//这里加载的是第二个数据源配置文件路径 使用的时候用application 读取第二个数据源的配置文件 就可以用getBean 获取注入的service 不用ac.getBean 用@Autowired自动注入的 则使用的是第一个数据源  PartyService partyService = (PartyService) ac.getBean("partyService");List<Emp> list = partyService.getAllEmp();for (Emp emp : list) {System.out.println(emp.getEmpno());}}

这样就可以封装一个父类

public class DataSourceChange {//第二个数据源数据源public ApplicationContext otherDataSource=new FileSystemXmlApplicationContext("classpath:config/hymanager/hymanager_spring.xml");//默认数据源public ApplicationContext defaultDataSource=new FileSystemXmlApplicationContext("classpath:config/spring_commons.xml");/** *  * 功能描述：xxxx * * @param beanName * @return * * @author xxx[[e-mail]] * * @since 2014年3月12日 * * @update:[变更日期YYYY-MM-DD][更改人姓名][变更描述] */public Object now(String beanName) {return defaultDataSource.getBean(beanName);}public Object after(String beanName) {return otherDataSource.getBean(beanName);}}

要使用多个数据源的类就可以继承这个父类

public class HyMangerEmpDataHandle extends DataSourceChange {//用父类的after方法更换配置切换第二套数据源获取注入partyServiceprivate PartyService partyService=(PartyService) after("partyService");//<span style="font-family: Arial, Helvetica, sans-serif;">用父类的now方法</span>更换配置切换第一套数据源获取注入empServiceprivate EmpService empService=(EmpService) now("empService");private static Logger log=LoggerFactory.getLogger(PartyService.class);/** *  * 功能描述：xxxxx * * @throws SQLException * * @author xxx[[e-mail]] * * @since 2014年3月12日 * * @update:[变更日期YYYY-MM-DD][更改人姓名][变更描述] */public void leadingAllEmp() throws SQLException {List<Emp> partyList=partyService.getAllEmp();//第二个数据源注入的servicefor(Emp emp:partyList) {empService.addEmp(emp);//第一个数据源注入的service}}}