Spring中mybatis多数据源写法

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:context="http://www.springframework.org/schema/context"xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang"xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p"xmlns:task="http://www.springframework.org/schema/task"xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd        http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd        http://www.springframework.org/schema/task         http://www.springframework.org/schema/task/spring-task.xsd"><context:annotation-config /><context:component-scan base-package="com.mx.*" /><!--计划任务 --><task:annotation-driven scheduler="Scheduler" executor="executor" mode="proxy"/><task:scheduler id="Scheduler" pool-size="5" /><task:executor id="executor" keep-alive="300" pool-size="10" queue-capacity="5" rejection-policy="CALLER_RUNS" />  <!--配置数据源属性文件 --><bean id="propertyConfigurer"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="location"><value>/WEB-INF/configs/sqlServer.properties</value></property></bean><bean id="conf" class="com.mx.server.common.config.ConfigLoader" /><!--配置数据源 --><bean id="parentDataSource" class="org.apache.commons.dbcp.BasicDataSource"></bean><!--配置数据源1 --><bean id="dataSource1" parent="parentDataSource"><property name="driverClassName"><value>${test1.driver}</value></property><property name="url"><value>${test1.url}</value></property><property name="username"><value>${test1.user}</value></property><property name="password"><value>${test1.pwd}</value></property><!--初始化连接数 --><property name="initialSize" value="10" /><!-- 最大连接数 --><property name="maxActive" value="20" /><!-- 最大空闲连接数 --><property name="maxIdle" value="15" /><!-- 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 10秒连接等待 --><property name="maxWait" value="10000" /><!-- 是否回收被遗弃的（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 60秒不工作回收 --><property name="removeAbandonedTimeout" value="60000" /><property name="testOnBorrow"><value>true</value></property><property name="validationQuery"><value>SELECT 1 FROM DUAL</value></property></bean><!--配置数据源2 --><bean id="dataSource2" parent="parentDataSource"><property name="driverClassName"><value>${test2.driver}</value></property><property name="url"><value>${test2.url}</value></property><property name="username"><value>${test2.user}</value></property><property name="password"><value>${test2.pwd}</value></property><!--初始化连接数 --><property name="initialSize" value="10" /><!-- 最大连接数 --><property name="maxActive" value="20" /><!-- 最大空闲连接数 --><property name="maxIdle" value="15" /><!-- 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 10秒连接等待 --><property name="maxWait" value="10000" /><!-- 是否回收被遗弃的（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 60秒不工作回收 --><property name="removeAbandonedTimeout" value="60000" /></bean><bean id="dataSource" class="com.mx.etl.common.util.dbChanges.DataSources"><property name="targetDataSources"><map key-type="java.lang.String"><entry value-ref="dataSource1" key="TEST1"></entry><entry value-ref="dataSource2" key="TEST2"></entry></map></property><property name="defaultTargetDataSource" ref="dataSource1"></property></bean><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="configLocation" value="classpath:mybatis_config.xml" /><property name="dataSource" ref="dataSource" /></bean><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" autowire="byName"><property name="basePackage" value="com.mx.*" /><property name="sqlSessionFactory" ref="sqlSessionFactory" /></bean>    <tx:annotation-driven transaction-manager="transactionManager" />    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource">            <ref bean="dataSource" />        </property>    </bean></beans>

DataSourceInstances。java

package com.mx.etl.common.util.dbChanges;public class DataSourceInstances {    //定义数据源的标识, 和applicationContext.xml中 DataSources 的 targetDataSources 的key对应     public static final String TEST1="TEST1";      public static final String TEST2="TEST2";  }

DataSources。java

package com.mx.etl.common.util.dbChanges;import java.sql.SQLFeatureNotSupportedException;import java.util.logging.Logger;import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;//配置于applicationContext 中，线程局部变量ThreadLocal contextHolder 保存当前需要的数据源类型，//当 DataSourceSwitch.setDataSourceType(DataSourceInstances.XXX),//保存当前需要的数据源类型的时候，DataSources 会从当前线程中查找线程变量的数据源类型，从而决定使用何种数据源  public class DataSources extends AbstractRoutingDataSource{          @Override      protected Object determineCurrentLookupKey() {          return DataSourceSwitch.getDataSourceType();      }    @Override    public Logger getParentLogger() throws SQLFeatureNotSupportedException {        // TODO Auto-generated method stub        return null;    }    }  

DataSourceSwitch.java

package com.mx.etl.common.util.dbChanges;public class DataSourceSwitch{      @SuppressWarnings("rawtypes")    private static final ThreadLocal contextHolder=new ThreadLocal();            @SuppressWarnings("unchecked")    public static void setDataSourceType(String dataSourceType){          contextHolder.set(dataSourceType);      }            public static String getDataSourceType(){          return (String) contextHolder.get();      }            public static void clearDataSourceType(){          contextHolder.remove();      }  } 

sqlServer.properties

#数据库1test1.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=truetest1.driver=com.mysql.jdbc.Drivertest1.user=roottest1.pwd=root#数据库2test2.url=jdbc:mysql://192.168.1.2:3306/test1?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=truetest2.driver=com.mysql.jdbc.Drivertest2.user=roottest2.pwd=root

用法：

AuthTask.java

@Componentpublic class AuthTask {        @Autowired    @Qualifier("ProjectServiceImpl")    private ProjectService projectService;        @Scheduled(cron = "0/1 * *  * * ? ")//    1、计划任务执行时，action中进来的方法也可以执行，需要flag进行判断。//    2、前一个时间没有执行完成，时间超过下一个“指定”的时间，计划任务跳过该时间。可以使用每隔多少分的写法来进行下个任务的执行        // 每5秒执行一次    private void executAuth() throws InterruptedException {                System.out.println("AuthTask在执行"+Thread.currentThread().getName());        DataSourceSwitch.setDataSourceType(DataSourceInstances.TEST1);        List<ProjectModel> list1 = projectService.selectAll();        System.out.println("********************************************************：" + list1.get(0).getProjectName());<pre name="code" class="java"> DataSourceSwitch.setDataSourceType(DataSourceInstances.TEST2);        List<ProjectModel> list2 = projectService.selectAll();        System.out.println("********************************************************：" + list2.get(0).getProjectName());

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