spring+mybatis+springMVC框架配置多数据源

1.在spring配置文件中配置

    
    <bean id="dataSource1" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}">property>
        <property name="jdbcUrl" value="${jdbc.url}">property>
        <property name="user" value="${jdbc.username}">property>
        <property name="password" value="${jdbc.password}">property>
    bean>
    
    <bean id="txManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        
        <property name="dataSource" ref="dataSource1">property>
    bean>

    
     
    <bean id="dataSource2" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc2.driver}">property>
        <property name="jdbcUrl" value="${jdbc2.url}">property>
        <property name="user" value="${jdbc2.username}">property>
        <property name="password" value="${jdbc2.password}">property>
    bean>
    
    <bean id="txManager2"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        
        <property name="dataSource" ref="dataSource2">property>
    bean>

    
    <bean id="multipleDataSource" class="com.pdzx.util.DynamicDataSource">
        <property name="defaultTargetDataSource" ref="dataSource1">property>
        <property name="targetDataSources">
            <map>
                <entry key="dataSource1" value-ref="dataSource1">entry>
                <entry key="dataSource2" value-ref="dataSource2">entry>
            map>
        property>
    bean>

2.继承AbstractRoutingDataSource

public class DBContextHolder {

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

}

 

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

3.切换数据库

//指定数据库
DBContextHolder.setDbType("dataSource1");