spring+mybatis 多数据源切换
spring + mybatis 多数据源切换
DbContextHolder
public class DbContextHolder { //线程安全的ThreadLocal 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(); } } DynamicDataSource
import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource; public class DynamicDataSource extends AbstractRoutingDataSource { @Override public Object determineCurrentLookupKey() { return DbContextHolder.getDbType(); } } spring.xml
<!-- 数据源属性配置文件 --> <context:property-placeholder location="classpath:ibatis.properties" /> <bean id="jksh" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <!-- Connection Info --> <property name="driverClassName" value="${driver.jksh}" /> <property name="url" value="${url.jksh}" /> <property name="username" value="${username.jksh}" /> <property name="password" value="${password.jksh}" /> <!-- Connection Pooling Info --> <property name="maxIdle" value="${maxIdle.jksh}" /> <property name="maxActive" value="${maxActive.jksh}" /> <property name="defaultAutoCommit" value="false" /> <property name="timeBetweenEvictionRunsMillis" value="${timeBetweenEvictionRunsMillis.jksh}" /> <property name="minEvictableIdleTimeMillis" value="${minEvictableIdleTimeMillis.jksh}" /> </bean> <bean id="jclt" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <!-- Connection Info --> <property name="driverClassName" value="${driver.jclt}" /> <property name="url" value="${url.jclt}" /> <property name="username" value="${username.jclt}" /> <property name="password" value="${password.jclt}" /> <!-- Connection Pooling Info --> <property name="maxIdle" value="${maxIdle.jclt}" /> <property name="maxActive" value="${maxActive.jclt}" /> <property name="defaultAutoCommit" value="false" /> <property name="timeBetweenEvictionRunsMillis" value="${timeBetweenEvictionRunsMillis.jclt}" /> <property name="minEvictableIdleTimeMillis" value="${minEvictableIdleTimeMillis.jclt}" /> </bean> <bean id="dataSource" class="com.jclt.service.commons.DynamicDataSource"> <property name="targetDataSources"> <map key-type="java.lang.String"> <entry key="jksh" value-ref="jksh" /> <entry key="jclt" value-ref="jclt" /> </map> </property> <property name="defaultTargetDataSource" ref="jksh" /> </bean> main方法
import javax.sql.DataSource; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.core.io.FileSystemResource; import org.springframework.core.io.Resource; import com.jclt.service.commons.DbContextHolder; import com.jclt.service.model.User; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; public class Text { /** * @param args */ public static void main(String[] args) { ApplicationContext appContext = new ClassPathXmlApplicationContext("client-beans.xml"); DbContextHolder.setDbType("jclt"); String res="src/main/resources/ibatis-config.xml"; DataSource datasource=(DataSource) appContext.getBean("dataSource"); SqlSessionFactoryBean bean=new SqlSessionFactoryBean(); bean.setDataSource(datasource); Resource resource=new FileSystemResource(res); bean.setConfigLocation(resource); try { SqlSessionFactory sessionfactory = bean.getObject(); SqlSession session=sessionfactory.openSession(); User user=session.selectOne("com.jclt.service.Dao.readJKSH.findOne"); System.out.println(user.getName()); } catch (Exception e) { e.printStackTrace(); } DbContextHolder.setDbType("jksh"); String res1="src/main/resources/ibatis-config.xml"; DataSource datasource1=(DataSource) appContext.getBean("dataSource"); SqlSessionFactoryBean bean1=new SqlSessionFactoryBean(); bean1.setDataSource(datasource1); Resource resource1=new FileSystemResource(res1); bean1.setConfigLocation(resource1); try { SqlSessionFactory sessionfactory = bean.getObject(); SqlSession session=sessionfactory.openSession(); User user=session.selectOne("com.jclt.service.Dao.readJKSH.findOne"); System.out.println(user.getName()); } catch (Exception e) { e.printStackTrace(); } } }