sharding-jdbc是当当开源的一款分库分表的数据访问层框架，能对mysql很方便的分库、分表，基本不用修改原有代码，只要配置一下即可，完整的配置参考以下内容：
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xmlns:context="http://www.springframework.org/schema/context" 5 xmlns:tx="http://www.springframework.org/schema/tx" 6 xsi:schemaLocation="http://www.springframework.org/schema/beans 7 http://www.springframework.org/schema/beans/spring-beans.xsd 8 http://www.springframework.org/schema/tx 9 http://www.springframework.org/schema/tx/spring-tx.xsd 10 http://www.springframework.org/schema/context 11 http://www.springframework.org/schema/context/spring-context.xsd"> 12 13 <context:component-scan base-package="com.cnblogs.yjmyzz.sharding"/> 14 15 <bean id="propertiesFactoryBean" 16 class="org.springframework.beans.factory.config.PropertiesFactoryBean"> 17 <property name="locations"> 18 <list> 19 <value>classpath:properties/jdbc.properties</value> 20 </list> 21 </property> 22 </bean> 23 24 <context:property-placeholder properties-ref="propertiesFactoryBean" ignore-unresolvable="true"/> 25 26 <!--父数据源--> 27 <bean id="parentDataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" 28 destroy-method="close"> 29 <property name="driverClassName" value="${jdbc-driver}"/> 30 <property name="url" value="${jdbc-url-0}"/> 31 <property name="username" value="${jdbc-user-0}"/> 32 <property name="password" value="${jdbc-password-0}"/> 33 <property name="filters" value="stat"/> 34 <property name="maxActive" value="20"/> 35 <property name="initialSize" value="1"/> 36 <property name="maxWait" value="60000"/> 37 <property name="minIdle" value="1"/> 38 <property name="timeBetweenEvictionRunsMillis" value="3000"/> 39 <property name="minEvictableIdleTimeMillis" value="300000"/> 40 <property name="validationQuery" value="SELECT 'x'"/> 41 <property name="testWhileIdle" value="true"/> 42 <property name="testOnBorrow" value="false"/> 43 <property name="testOnReturn" value="false"/> 44 <property name="poolPreparedStatements" value="true"/> 45 <property name="maxPoolPreparedStatementPerConnectionSize" value="20"/> 46 <property name="connectionInitSqls" value="set names utf8mb4;"/> 47 </bean> 48 49 <!--数据源0--> 50 <bean id="ds_0" parent="parentDataSource"> 51 <property name="driverClassName" value="${jdbc-driver}"/> 52 <property name="url" value="${jdbc-url-0}"/> 53 <property name="username" value="${jdbc-user-0}"/> 54 <property name="password" value="${jdbc-password-0}"/> 55 </bean> 56 57 <!--数据源1--> 58 <bean id="ds_1" parent="parentDataSource"> 59 <property name="driverClassName" value="${jdbc-driver}"/> 60 <property name="url" value="${jdbc-url-1}"/> 61 <property name="username" value="${jdbc-user-1}"/> 62 <property name="password" value="${jdbc-password-1}"/> 63 </bean> 64 65 <!--数据源2--> 66 <bean id="ds_2" parent="parentDataSource"> 67 <property name="driverClassName" value="${jdbc-driver}"/> 68 <property name="url" value="${jdbc-url-2}"/> 69 <property name="username" value="${jdbc-user-2}"/> 70 <property name="password" value="${jdbc-password-2}"/> 71 </bean> 72 73 <!--真正使用的数据源--> 74 <bean id="dataSource" class="com.dangdang.ddframe.rdb.sharding.api.rule.DataSourceRule"> 75 <constructor-arg> 76 <map> 77 <entry key="ds_0" value-ref="ds_0"/> 78 <entry key="ds_1" value-ref="ds_1"/> 79 <entry key="ds_2" value-ref="ds_2"/> 80 </map> 81 </constructor-arg> 82 </bean> 83 84 <!--t_order的"分表"设置:分N个表 --> 85 <bean id="orderTableRule" class="com.dangdang.ddframe.rdb.sharding.api.rule.TableRule"> 86 <constructor-arg value="t_order" index="0"/> 87 <constructor-arg index="1"> 88 <list> 89 <value>t_order_0</value> 90 <value>t_order_1</value> 91 </list> 92 </constructor-arg> 93 <constructor-arg index="2" ref="dataSource"/> 94 </bean> 95 96 <!--分库的sharding规则:按user_id分库 --> 97 <bean id="databaseShardingStrategy" 98 class="com.dangdang.ddframe.rdb.sharding.api.strategy.database.DatabaseShardingStrategy"> 99 <constructor-arg index="0" value="user_id"/> 100 <constructor-arg index="1"> 101 <bean class="com.cnblogs.yjmyzz.sharding.algorithm.SingleKeyModuloDatabaseShardingAlgorithm"> 102 <!--dbount的值要跟上面dataSource的个数匹配--> 103 <property name="dbCount" value="3"/> 104 </bean> 105 </constructor-arg> 106 </bean> 107 108 <!--分表的规则:按order_id分表--> 109 <bean id="tableShardingStrategy" class="com.dangdang.ddframe.rdb.sharding.api.strategy.table.TableShardingStrategy"> 110 <constructor-arg index="0" value="order_id"/> 111 <constructor-arg index="1"> 112 <bean class="com.cnblogs.yjmyzz.sharding.algorithm.SingleKeyModuloTableShardingAlgorithm"> 113 <!--tableCount的值要跟上面t_order表设置的分表个数保持一致--> 114 <property name="tableCount" value="2"/> 115 </bean> 116 </constructor-arg> 117 </bean> 118 119 <!--sharding规则Bean--> 120 <bean id="shardingRule" class="com.dangdang.ddframe.rdb.sharding.api.rule.ShardingRule"> 121 <constructor-arg index="0" ref="dataSource"/> 122 <constructor-arg index="1"> 123 <list> 124 <ref bean="orderTableRule"/> 125 </list> 126 </constructor-arg> 127 <constructor-arg index="2" ref="databaseShardingStrategy"/> 128 <constructor-arg index="3" ref="tableShardingStrategy"/> 129 </bean> 130 131 <!--sharding数据源--> 132 <bean id="shardingDataSource" class="com.dangdang.ddframe.rdb.sharding.api.ShardingDataSource"> 133 <constructor-arg ref="shardingRule"/> 134 </bean> 135 136 <!--sharding事务管理器--> 137 <!--<bean >--> 138 <!--class="org.springframework.jdbc.datasource.DataSourceTransactionManager">--> 139 <!--<property name="dataSource" ref="shardingDataSource"/>--> 140 <!--</bean>--> 141 142 <!--<tx:annotation-driven transaction-manager="transactionManager"/>--> 143 144 <!--mybatis配置--> 145 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 146 <property name="configLocation" value="classpath:mybatis-config.xml"></property> 147 <property name="dataSource" ref="shardingDataSource"/> 148 <property name="mapperLocations" value="classpath:mybatis/OrderMapper.xml"/> 149 </bean> 150 151 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 152 <property name="basePackage" value="com.cnblogs.yjmyzz.sharding.mapper"/> 153 <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> 154 </bean> 155 156 </beans>