spring+mybatis 多数据源切换

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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" /> <!--建议两个一样-->                <entry key="jclt" value-ref="jclt" />            </map>        </property>        <property name="defaultTargetDataSource" ref="jksh" /> <!--默认是<span style="font-family: Arial, 宋体;">jclt的数据源--></span><span style="font-family: Arial, 宋体;"></span>    </bean>

使用说明：

直接调用

DbContextHolder.setDbType("<span style="font-family: Arial, 宋体;">jclt</span><span style="font-family: Arial, 宋体;">");</span>

注意：
这个是静态方法可以调用，但是运用这个数据源再用另一个数据源时，切换没完成，页面可能就报错，我在控制层和service实现层都加这个方法，发现在一个层加有时候还是会报错，实在不行就在dao那层也加上，建议是所有都加(我是没在找到办法，我哭啊，要是大家有什么办法私信我)。

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