mybatis配置多数据源(利用spring的AbstractRoutingDataSource)

主要是利用了spring的AbstractRoutingDataSource。

直接上配置了：

1. spring-mybatis.xml

    <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <property name="url" value="${db_url}" />
        <property name="username" value="${db_username}" />
        <property name="password" value="${db_password}" />
        <property name="initialSize" value="1" />
        <property name="maxActive" value="20" />
        <property name="minIdle" value="1" />
        <property name="maxWait" value="60000" />
        <property name="poolPreparedStatements" value="true" />
        <property name="maxPoolPreparedStatementPerConnectionSize" value="33" />
        <property name="validationQuery" value="${validationQuery}" />
        <property name="testOnBorrow" value="false" />
        <property name="testOnReturn" value="false" />
        <property name="testWhileIdle" value="true" />
        <property name="timeBetweenEvictionRunsMillis" value="60000" />
        <property name="minEvictableIdleTimeMillis" value="25200000" />
        <property name="removeAbandoned" value="true" />
        <property name="removeAbandonedTimeout" value="1800" />
        <property name="logAbandoned" value="true" />
        <property name="filters" value="mergeStat" />
    </bean>

    <bean name="dataSource2" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <property name="url" value="${financial_model_url}" />
        <property name="username" value="${financial_model_username}" />
        <property name="password" value="${financial_model_password}" />
        <property name="initialSize" value="10" />
        <property name="maxActive" value="20" />
        <property name="minIdle" value="20" />
        <property name="maxWait" value="60000" />
        <property name="poolPreparedStatements" value="false" />
        <property name="maxPoolPreparedStatementPerConnectionSize" value="33" />
        <property name="validationQuery" value="${validationQuery}" />
        <property name="testOnBorrow" value="false" />
        <property name="testOnReturn" value="false" />
        <property name="testWhileIdle" value="true" />
        <property name="timeBetweenEvictionRunsMillis" value="60000" />
        <property name="minEvictableIdleTimeMillis" value="25200000" />
        <property name="removeAbandoned" value="true" />
        <property name="removeAbandonedTimeout" value="1800" />
        <property name="logAbandoned" value="true" />
        <property name="filters" value="mergeStat" />
    </bean>

    <bean name="dataSource3" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <property name="url" value="${oracle.jdbc.url}" />
        <property name="username" value="${oracle.jdbc.username}" />
        <property name="password" value="${oracle.jdbc.password}" />
        <property name="initialSize" value="1" />
        <property name="maxActive" value="20" />
        <property name="minIdle" value="1" />
        <property name="maxWait" value="60000" />
        <property name="poolPreparedStatements" value="true" />
        <property name="maxPoolPreparedStatementPerConnectionSize" value="33" />
        <property name="validationQuery" value="${orcale.validationQuery}" />
        <property name="testOnBorrow" value="false" />
        <property name="testOnReturn" value="false" />
        <property name="testWhileIdle" value="true" />
        <property name="timeBetweenEvictionRunsMillis" value="60000" />
        <property name="minEvictableIdleTimeMillis" value="25200000" />
        <property name="removeAbandoned" value="true" />
        <property name="removeAbandonedTimeout" value="1800" />
        <property name="logAbandoned" value="true" />
        <property name="filters" value="mergeStat" />
    </bean>

    <bean id="multipleDataSource" class="com.utils.MultipleDataSource">
        <property name="targetDataSources">
            <map>
                <entry key="dataSource" value-ref="dataSource"/>
                <entry key="dataSource2" value-ref="dataSource2"/>
                <entry key="dataSource3" value-ref="dataSource3"/>
            </map>
        </property>
        <property name="defaultTargetDataSource" ref="dataSource2"></property>
    </bean>

MultipleDataSource.java

public class MultipleDataSource extends AbstractRoutingDataSource {

    @Override
    protected Object determineCurrentLookupKey() {
        // TODO Auto-generated method stub

        return DataSourceTypeManager.get();
    }

}

DataSourceTypeManager.java（为了避免多个线程间造成并发问题，用了线程本地变量）

public class DataSourceTypeManager {

    //
    public static final String DS_BIO = "dataSource";
    //
    public static final String DS_MODEL = "dataSource2";
    //
    public static final String DS_ORACLE_RD = "dataSource3";


    private static final ThreadLocal<String> dataSourceKey = new ThreadLocal<String>(){
       /* @Override
        protected String initialValue(){
            return DS_SUNGBIO;
        }*/
    };

    public static void setDataSourceKey(String dataSource) {
        dataSourceKey.set(dataSource);
    }
    public static String get(){
        return dataSourceKey.get();
    }
    public static void set(String dataSourceType){
        dataSourceKey.set(dataSourceType);
    }

    public static void reset(){
        dataSourceKey.set(DS_BIO);
    }

    public static void cleanDataSource(){
        dataSourceKey.remove();
    }
}

使用方法：

使用前，手动写：

DataSourceTypeManager.setDataSourceKey(DataSourceTypeManager.DS_MODEL);

嫌麻烦的话，也可以像如下参考文章，配置注解,然后增加aop:

http://www.cnblogs.com/davidwang456/p/4318303.html