resin文件配置（我用的resin，其他的可自行配置）
<database><jndi-name>jdbc/OracleDB</jndi-name><driver type="oracle.jdbc.driver.OracleDriver"><!--<url>jdbc:oracle:thin:@oa.paipai580.com:1521:orcl</url><user>cggl</user><password>cggl345#$%</password>--><url>jdbc:oracle:thin:@192.168.1.9:1521:orcl</url><user>ycg</user><password>ycg</password></driver><prepared-statement-cache-size>8</prepared-statement-cache-size><max-connections>20</max-connections><max-idle-time>30s</max-idle-time></database><database><jndi-name>jdbc/mysqlDB</jndi-name><driver type="com.mysql.jdbc.Driver"><url>jdbc:mysql://39.98.47.52:3306/dev-idr</url><user>admin</user><password>mySteel2019,!@#</password></driver><prepared-statement-cache-size>8</prepared-statement-cache-size><max-connections>20</max-connections><max-idle-time>30s</max-idle-time></database>

package org.thcic.ejw.components.datatable;public class DataSourceHolder {private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();/*** @Description: 设置数据源类型* @param dataSourceType  数据库类型* @return void* @throws*/public static void setDataSourceType(String dataSourceType) {contextHolder.set(dataSourceType);}/*** @Description: 获取数据源类型* @return String* @throws*/public static String getDataSourceType() {return contextHolder.get();}/*** @Description: 清除数据源类型* @return void* @throws*/public static void clearDataSourceType() {contextHolder.remove();}}

package org.thcic.ejw.components.datatable;import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;public class RoutingDataSource extends AbstractRoutingDataSource {@Overrideprotected Object determineCurrentLookupKey() {return DataSourceHolder.getDataSourceType();}}

<!--配置数据源路由--><bean id="dataSource" class="org.thcic.ejw.components.datatable.RoutingDataSource"><!-- 为targetDataSources注入两个数据源 --><property name="targetDataSources"><map key-type="java.lang.String"><entry key="orcleDb" value-ref="orclDataSource"/><entry key="mysqlDb" value-ref="mysqlDataSource"/></map></property><!-- 为指定数据源RoutingDataSource注入默认的数据源--><property name="defaultTargetDataSource" ref="orclDataSource"/></bean>

<!--hibernate start--><bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"><property name="dataSource" ref="dataSource"></property><property name="hibernateProperties"><props><prop key="hibernate.dialect">${dataSource.hibernate.dialect}</prop><prop key="hibernate.connection.useUnicode">true</prop><prop key="hibernate.connection.characterEncoding">utf-8</prop><prop key="hibernate.show_sql">${dataSource.hibernate.show_sql}</prop><prop key="hibernate.jdbc.fetch_size">50</prop></props></property><property name="packagesToScan">  <list>  <value>org.thcic.ejw.sys.vo</value>  <value>org.thcic.ejw.purchase.setting.vo</value>  <value>org.thcic.ejw.purchase.inquiry.vo</value><value>org.thcic.ejw.purchase.notice.vo</value>  <value>org.thcic.ejw.purchase.bid.vo</value><value>org.thcic.ejw.purchase.report.vo</value>  </list> </property></bean>

<!--jdbcTemplate start--><bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" abstract="false"lazy-init="false" autowire="default" ><property name="dataSource" ref="dataSource"></property></bean><bean id="mysqlJdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" abstract="false"lazy-init="false" autowire="default" ><property name="dataSource" ref="mysqlDataSource"></property></bean>

/*jdbcTemplate的使用*/
@Autowired@Qualifier("oracleJdbcTemplate")private JdbcTemplate dbTwojdbcTemplate;@Autowired@Qualifier("mysqlJdbcTemplate")private JdbcTemplate dbOneJdbcTemplate;/*数据源切换*/
//获取数据源类型
DataSourceHolder.getDataSourceType();
//设置为 db1 的数据源
DataSourceHolder.setDataSourceType("db1");
//设置为 db2 的数据源
DataSourceHolder.setDataSourceType("db2");