MyBatis 配置多数据源

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
           http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--数据源2 -->
<bean id="projectdataSource" class="com.alibaba.druid.pool.DruidDataSource"
      init-method="init" destroy-method="close">
    <property name="url" value="${jdbc.url}" />
    <property name="username" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />

    <property name="initialSize" value="${jdbc.initialSize}" />
    <property name="minIdle" value="${jdbc.minIdle}" />
    <property name="maxActive" value="${jdbc.maxIdle}" />
    <property name="maxWait" value="${jdbc.maxActive}" />

    <property name="timeBetweenEvictionRunsMillis" value="60000" />
    <property name="minEvictableIdleTimeMillis" value="300000" />
    <property name="validationQuery" value="SELECT 'x'" />
    <property name="testWhileIdle" value="true" />
    <property name="testOnBorrow" value="false" />
    <property name="testOnReturn" value="false" />

    <property name="poolPreparedStatements" value="false" />
    <property name="maxPoolPreparedStatementPerConnectionSize"
              value="20" />

    <property name="connectionProperties"
              value="useUnicode=true;characterEncoding=utf8;connectTimeout=5000;socketTimeout=60000;autoReconnect=true;failOverReadOnly=false;allowMultiQueries=true" />
</bean>


<bean id="projectsqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="configLocation">
        <value>classpath:mybatis/mapper1.xml</value>
    </property>
    <property name="dataSource" ref="projectdataSource" />
</bean>
<bean id="projectsqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg index="0" ref="projectsqlSessionFactory" />
</bean>

<!--数据源3 UC 数据 -->
<bean id="ucDataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
    <property name="url" value="${jdbc.uc.url}" />
    <property name="username" value="${jdbc.uc.username}" />
    <property name="password" value="${jdbc.uc.password}" />
    <property name="initialSize" value="${jdbc.uc.initialSize}" />
    <property name="minIdle" value="${jdbc.uc.minIdle}" />
    <property name="maxActive" value="${jdbc.uc.maxIdle}" />
    <property name="maxWait" value="${jdbc.uc.maxActive}" />
    <property name="timeBetweenEvictionRunsMillis" value="60000" />
    <property name="minEvictableIdleTimeMillis" value="300000" />
    <property name="validationQuery" value="SELECT 'x'" />
    <property name="testWhileIdle" value="true" />
    <property name="testOnBorrow" value="false" />
    <property name="testOnReturn" value="false" />
    <property name="poolPreparedStatements" value="false" />
    <property name="maxPoolPreparedStatementPerConnectionSize"  value="20" />
    <property name="connectionProperties"
              value="useUnicode=true;characterEncoding=utf8;connectTimeout=5000;socketTimeout=60000;autoReconnect=true;failOverReadOnly=false;allowMultiQueries=true" />
</bean>
<bean id="ucSqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="configLocation">
        <value>classpath:mybatis/mapper_uc.xml</value>
    </property>
    <property name="dataSource" ref="ucDataSource" />
</bean>
<bean id="ucSqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg index="0" ref="ucSqlSessionFactory" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.qdingnet.pcloud.adverts.uc.ucext" />
    <property name="sqlSessionTemplateBeanName" value="ucSqlSession" />
</bean>

<!--数据源1 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
      init-method="init" destroy-method="close">
    <property name="url" value="${ad.db.url}" />
    <property name="username" value="${ad.db.username}" />
    <property name="password" value="${ad.db.password}" />

    <property name="initialSize" value="${ad.db.initialSize}" />
    <property name="minIdle" value="${ad.db.minIdle}" />
    <property name="maxActive" value="${ad.db.maxActive}" />
    <property name="maxWait" value="${ad.db.maxWait}" />

    <property name="timeBetweenEvictionRunsMillis" value="60000" />
    <property name="minEvictableIdleTimeMillis" value="300000" />
    <property name="validationQuery" value="SELECT 'x'" />
    <property name="testWhileIdle" value="true" />
    <property name="testOnBorrow" value="false" />
    <property name="testOnReturn" value="false" />

    <property name="poolPreparedStatements" value="false" />
    <property name="maxPoolPreparedStatementPerConnectionSize"
              value="20" />

    <property name="connectionProperties"
              value="useUnicode=true;characterEncoding=utf8;connectTimeout=5000;socketTimeout=60000;autoReconnect=true;failOverReadOnly=false;allowMultiQueries=true" />
</bean>



<!--mybatis -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="configLocation">
        <value>classpath:mybatis/mapper.xml</value>
    </property>
    <property name="dataSource" ref="dataSource" />
</bean>

<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg index="0" ref="sqlSessionFactory" />
</bean>

<aop:aspectj-autoproxy />
<!-- 注解Mapper scanner -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.xihl.region.chargeext" />
    <property name="sqlSessionTemplateBeanName" value="projectsqlSession" />
</bean>
<!--事务 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.xihl.**.ext" />
    <property name="sqlSessionTemplateBeanName" value="sqlSession" />
</bean>

<bean id="txManager"
      class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" />
</bean>
<tx:annotation-driven transaction-manager="txManager" />
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <!-- 将下划线字段名称映射为驼峰变量  -->
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <!-- 进制mybatis进行延迟加载 -->
        <setting name="lazyLoadingEnabled" value="false"/>
        <setting name="useGeneratedKeys" value="true" />
    </settings>
    <!-- 插件配置 -->
    <plugins>
        <!-- com.github.pagehelper为PageHelper类所在包名 -->
        <plugin interceptor="com.github.pagehelper.PageInterceptor">
           <!-- <property name="dialect" value="mysql"/>-->
            <!-- 该参数默认为false -->
            <!-- 设置为true时，会将RowBounds第一个参数offset当成pageNum页码使用 -->
            <!-- 和startPage中的pageNum效果一样-->
            <property name="offsetAsPageNum" value="false"/>
            <!-- 该参数默认为false -->
            <!-- 设置为true时，使用RowBounds分页会进行count查询 -->
            <property name="rowBoundsWithCount" value="false"/>
            <!-- 设置为true时，如果pageSize=0或者RowBounds.limit = 0就会查询出全部的结果 -->
            <!-- （相当于没有执行分页查询，但是返回结果仍然是Page类型）-->
            <property name="pageSizeZero" value="false"/>
            <!-- 3.3.0版本可用 - 分页参数合理化，默认false禁用 -->
            <!-- 启用合理化时，如果pageNum<1会查询第一页，如果pageNum>pages会查询最后一页 -->
            <!-- 禁用合理化时，如果pageNum<1或pageNum>pages会返回空数据 -->
            <property name="reasonable" value="false"/>
            <!-- 3.5.0版本可用 - 为了支持startPage(Object params)方法 -->
            <!-- 增加了一个`params`参数来配置参数映射，用于从Map或ServletRequest中取值 -->
            <!-- 可以配置pageNum,pageSize,count,pageSizeZero,reasonable,orderBy,不配置映射的用默认值 -->
            <!-- 不理解该含义的前提下，不要随便复制该配置 -->
            <property name="params" value="pageNum=pageNum;pageSize=pageSize;"/>
            <!-- 支持通过Mapper接口参数来传递分页参数 -->
            <property name="supportMethodsArguments" value="false"/>
            <!-- always总是返回PageInfo类型,check检查返回类型是否为PageInfo,none返回Page -->
            <property name="returnPageInfo" value="check"/>
        </plugin>
        <plugin interceptor="com.xhl.log.plugins.SqlLogger">
            <!-- 设置超过多长时间就打印这条sql，单位为ms。默认为600ms。  -->
            <property name="exccedtime" value="1500"/>
        </plugin>
    </plugins>
    <mappers>
        <mapper resource="mybatis/mapper_uc_user_detail.xml"></mapper> <!-- 这里引入的真是真正的MyBatis配置文件-->
    </mappers>
</configuration>

import java.text.DateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Properties;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Intercepts({@Signature(
    type = Executor.class,
    method = "update",
    args = {MappedStatement.class, Object.class}
), @Signature(
    type = Executor.class,
    method = "query",
    args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class}
)})
public class SqlLogger implements Interceptor {
    private final Logger _LOGGER = LoggerFactory.getLogger(this.getClass());
    private static Long exceedTime = 600L;

    public SqlLogger() {
    }

    public Object intercept(Invocation invocation) throws Throwable {
        Object returnValue = null;
        long start = 0L;
        MappedStatement mappedStatement = null;
        BoundSql boundSql = null;
        String sqlId = null;
        Configuration configuration = null;

        try {
            mappedStatement = (MappedStatement)invocation.getArgs()[0];
            Object parameter = null;
            if (invocation.getArgs().length > 1) {
                parameter = invocation.getArgs()[1];
            }

            sqlId = mappedStatement.getId();
            boundSql = mappedStatement.getBoundSql(parameter);
            configuration = mappedStatement.getConfiguration();
            start = System.currentTimeMillis();
        } catch (Throwable var15) {
            this._LOGGER.error("error", var15);
        }

        returnValue = invocation.proceed();

        try {
            long end = System.currentTimeMillis();
            long time = end - start;
            String sql;
            if (time >= exceedTime) {
                sql = getSql(configuration, boundSql, sqlId, time);
                this._LOGGER.info("*** sql is *** [{}] *** cost is *** {}ms *** has exceed the limit *** limit is *** {}ms ***", new Object[]{sql.split(":")[1], time, exceedTime});
                return returnValue;
            }

            if (this._LOGGER.isDebugEnabled()) {
                sql = getSql(configuration, boundSql, sqlId, time);
                this._LOGGER.debug("*** sql is *** [{}] *** cost is *** {}ms ***", sql.split(":")[1], time);
            }
        } catch (Throwable var14) {
            this._LOGGER.error("error", var14);
        }

        return returnValue;
    }

    private static String getSql(Configuration configuration, BoundSql boundSql, String sqlId, long time) {
        String sql = showSql(configuration, boundSql);
        StringBuilder str = new StringBuilder(100);
        str.append(sqlId);
        str.append(":");
        str.append(sql);
        str.append(":");
        str.append(time);
        str.append("ms");
        return str.toString();
    }

    public Object plugin(Object target) {
        return Plugin.wrap(target, this);
    }

    public void setProperties(Properties properties) {
        if (properties != null) {
            if (!properties.isEmpty()) {
                String exccedtime = properties.getProperty("exccedtime");
                if (exccedtime != null && !"".equals(exccedtime)) {
                    try {
                        long l = Long.parseLong(exccedtime);
                        exceedTime = l;
                    } catch (Exception var5) {
                        this._LOGGER.error("error", var5);
                    }

                }
            }
        }
    }

    private static String getParameterValue(Object obj) {
        String value = null;
        if (obj instanceof String) {
            value = "'" + obj.toString() + "'";
        } else if (obj instanceof Date) {
            DateFormat formatter = DateFormat.getDateTimeInstance(2, 2, Locale.CHINA);
            value = "'" + formatter.format(new Date()) + "'";
        } else if (obj != null) {
            value = obj.toString();
        } else {
            value = "";
        }

        return value;
    }

    private static String showSql(Configuration configuration, BoundSql boundSql) {
        Object parameterObject = boundSql.getParameterObject();
        List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
        String sql = boundSql.getSql().replaceAll("[\\s]+", " ");
        if (parameterMappings.size() > 0 && parameterObject != null) {
            TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
            if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
                sql = sql.replaceFirst("\\?", getParameterValue(parameterObject));
            } else {
                MetaObject metaObject = configuration.newMetaObject(parameterObject);
                Iterator var7 = parameterMappings.iterator();

                while(var7.hasNext()) {
                    ParameterMapping parameterMapping = (ParameterMapping)var7.next();
                    String propertyName = parameterMapping.getProperty();
                    Object obj;
                    if (metaObject.hasGetter(propertyName)) {
                        obj = metaObject.getValue(propertyName);
                        sql = sql.replaceFirst("\\?", getParameterValue(obj));
                    } else if (boundSql.hasAdditionalParameter(propertyName)) {
                        obj = boundSql.getAdditionalParameter(propertyName);
                        sql = sql.replaceFirst("\\?", getParameterValue(obj));
                    }
                }
            }
        }

        return sql;
    }
}

PS:紫色部分是配置数据源对应的Mapper，黄色部分是真正区分不同数据源对应的Mapper包！