spring 集成mybatis——多数据源切换（附带定时器的配置，存储过程连接，数据多于50条，分批进行操作）

新建com.millery.utils包在其下新建DataSourceContextHolder类

package com.millery.utils;

public class DataSourceContextHolder {  
    private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();  
    public static void setDbType(String dbType) {  
        contextHolder.set(dbType);  
    }  
    public static String getDbType() {  
        return ((String) contextHolder.get());  
    }  
    public static void clearDbType() {  
        contextHolder.remove();  
    }  
}  

新建DataSourceContextHolder类

package com.millery.utils;

import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;

public class DynamicDataSource extends AbstractRoutingDataSource {  
    @Override  
    protected Object determineCurrentLookupKey() {  
        return DataSourceContextHolder.getDbType();  
    }  
}  

配置mybatis

<?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:tx="http://www.springframework.org/schema/tx" 
xmlns:jpa="http://www.springframework.org/schema/data/jpa"   
xmlns:util="http://www.springframework.org/schema/util"  
xmlns:jaxws="http://cxf.apache.org/jaxws"  

xmlns:p="http://www.springframework.org/schema/p" 
xmlns:aop="http://www.springframework.org/schema/aop" 

xsi:schemaLocation="http://www.springframework.org/schema/beans     
		http://www.springframework.org/schema/beans/spring-beans-4.3.xsd     
		http://www.springframework.org/schema/context
     	http://www.springframework.org/schema/context/spring-context-4.3.xsd
     	
     	http://www.springframework.org/schema/tx     
     	http://www.springframework.org/schema/tx/spring-tx-4.3.xsd     
     	http://www.springframework.org/schema/util  
     	http://www.springframework.org/schema/util/spring-util-4.3.xsd 
     	     	     	
     	http://www.springframework.org/schema/aop     
     	http://www.springframework.org/schema/aop/spring-aop-4.3.xsd   

     	http://www.springframework.org/schema/data/jpa                           
		http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsd        
		http://www.springframework.org/schema/beans                              
		http://www.springframework.org/schema/beans/spring-beans.xsd    
		 	     
     	http://cxf.apache.org/jaxws    
     	http://cxf.apache.org/schemas/jaxws.xsd">
     	
     	<import resource="classpath:META-INF/cxf/cxf.xml"/>  
    	<import resource="classpath:META-INF/cxf/cxf-servlet.xml"/>  
    	<import resource="classpath:META-INF/cxf/cxf-extension-soap.xml"/> 
	<!-- 自动扫描 -->
	<context:component-scan base-package="com.hqgf" />
	<!-- 引入配置文件 -->
	<bean id="propertyConfigurer"
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location" value="classpath:jdbc.properties" />
	</bean>
    <!-- <util:properties id="APP_PROPERTIES" location="classpath:attendance.properties" local-override="true"/> -->
	<bean id="HrtestSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>
		<property name="url" value="jdbc:sqlserver://172.69.1.236;DatabaseName=LongshineWebHr" />
		<property name="username" value="sa" />
		<property name="password" value="Hqmart88" />
	</bean>
	<bean id="HrSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>
		<property name="url" value="jdbc:sqlserver://172.88.10.161;DatabaseName=LongshineWebHr " />
		<property name="username" value="sa" />
		<property name="password" value="Hqmart88" />
	</bean>
	<bean id="AttendanceSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<property name="url" value="jdbc:mysql://172.69.1.8:3306/hws_sqlservice?useUnicode\=true;characterEncoding\=utf-8" />
		<property name="username" value="root" />
		<property name="password" value="[email protected]" />
	</bean>

	<!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
    <bean id="dataSource" class="com.millery.utils.DynamicDataSource">    
        <property name="targetDataSources">    
            <map key-type="java.lang.String">    
                <entry value-ref="HrtestSource" key="HrtestSource"></entry>    
                <entry value-ref="HrSource" key="HrSource"></entry>   
                <entry value-ref="AttendanceSource" key="AttendanceSource"></entry> 
            </map>    
        </property>    
        <property name="defaultTargetDataSource" ref="HrtestSource"></property><!-- 默认使用HrtestSource的数据源 -->  
    </bean>  

    <!-- 2. mybatis 的SqlSession 的工厂: SqlSessionFactoryBean -->  
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
        <property name="dataSource" ref="dataSource"/>  
        <property name="mapperLocations" value="classpath:com/hqgf/mapping/*.xml"/>  
    </bean> 
    
    <!-- 3. mybatis 自动扫描加载Sql 映射文件 : MapperScannerConfigurer -->  
    <!-- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
        <property name="basePackage" value="com.mapper"/>  
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>  
    </bean>  -->         	

    <!-- 4. 事务管理 : DataSourceTransactionManager -->  
    <bean  id="txManager"   
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
        <property name="dataSource" ref="dataSource"/>  
    </bean>   
      
    <!-- 5. 使用声明式事务 -->  
    <tx:annotation-driven transaction-manager="txManager" />  
	  
  
  <!-- 数据抓取任务 -->
  <!-- 任务实体 -->
   <bean id="eleTaskBean" class="com.hqgf.attendanceupload.HwsTimeTask" /> 
  
  <bean id="eletasktimingmethod" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"> 
    <property name="targetObject" ref="eleTaskBean" /> 
    <!-- targetMethod 配置定时执行的方法名 -->
    <property name="targetMethod" value="TimeTaskData" /> 
    <property name="concurrent" value="false" /> 
  </bean>
  
  <!-- 设置每天凌晨两点执行定时任务 -->
   <bean id="eleTaskTrigger"
    class="org.springframework.scheduling.quartz.CronTriggerFactoryBean"> 
    <property name="jobDetail" ref="eletasktimingmethod" /> 
    <property name="cronExpression" value="01 50 16 * * ?" /> 
  </bean>  

  
  <!-- 订制任务列表 -->
 <bean id="scheduler"
    class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> 
    <property name="triggers"> 
      <list> 
        <ref bean="eleTaskTrigger" /> 
      </list> 
    </property> 
  </bean>  
</beans>  

每个mapper调用之前

   /**
	 * @author ldq
	 * 转正审批
	 * 切换数据库《HR系统数据库》
	 * 2018年2月27日11:24:09
	 */
	@Override
	public void turnPositive(Map<String, Object> tmso) throws Exception {
		
		//数据库统一配置文件
		Properties prop = new Properties();		
		InputStream is = this.getClass().getResourceAsStream("/multi-database.properties");
		prop.load(is);
		is.close();
		String database =  prop.getProperty("databasename");
		
		DataSourceContextHolder.setDbType(database);
		
		getSqlSession().insert("com.hqgf.dao.ISyncOaDao.turnPositive",tmso);
		
	}

数据库切换成功。

       <!--   HR考勤数据存储过程  -->
      <insert id="Storedprocedure" parameterType="java.util.Map" statementType="CALLABLE">
            <![CDATA[ 
				{ call Hq_Attendance					
				(							
					  #{A0188,mode=IN,jdbcType=VARCHAR},				  
			          #{CARD_TIME,mode=IN,jdbcType=VARCHAR},			          
			          #{ACTIONTIME,mode=IN,jdbcType=VARCHAR}		        
				)				  				
				} 
				  ]]>  
      </insert>	

        ///////////如果数据多于50条，分批进行操作
		int batchnumber = 50;
		int opnumber = (int) Math.ceil((double) mso.size()
				/ (double) batchnumber);
		for (int j = 0; j < opnumber; j++) {
			List<Map<String, Object>> lop = new ArrayList<Map<String, Object>>();
			for (int k = 0; k < batchnumber; k++) {
				if ((j * batchnumber + k) < mso.size()) {
					lop.add(mso.get(j * batchnumber + k));
				} else {
					break;
				}
			}
			Map<String, Object> map = new HashMap<String, Object>();
			map.put("m", lop);
			getSqlSession().insert(
					"com.hqgf.dao.IUploadAttendanceDao.extractData", map);
		}