1. 数据源也就是jdbc.properties,因为是主从读写分离,那么肯定有两个数据源了

jdbc.driver=org.mariadb.jdbc.Driver  # 从库,只读 slave.jdbc.url=jdbc:mariadb://xxx.xxx.xxx.xxx:3306/xxx?characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&noAccessToProcedureBodies=true&autoReconnect=true slave.jdbc.username=xxx slave.jdbc.password=xxx  # 主库,需要写 master.jdbc.url=jdbc:mariadb://xxx.xxx.xxx.xxx:3306/xxx?characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&noAccessToProcedureBodies=true&autoReconnect=true master.jdbc.username=xxx master.jdbc.password=xxx

这个非常简单和普通的区别不是很大,另外数据库的驱动是:mariadb,动下面就是第二个配置文件spring.xml

2. spring.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"  xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd ">  <!-- Import properties file -->  <context:property-placeholder location="classpath:jdbc.properties" />  <!-- Auto Scan -->  <context:component-scan base-package="cn.bridgeli.demo" /> </beans> 

这个文件很简单,有两个作用,①. 引入数据源配置文件;②. spring扫描的文件的路径

3. spring-mybatis.xml配置文件

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd ">  <bean id="slaveDataSourceImpl" class="com.jolbox.bonecp.BoneCPDataSource" destroy-method="close">   <property name="driverClass" value="${jdbc.driver}" />   <property name="jdbcUrl" value="${slave.jdbc.url}" />   <property name="username" value="${slave.jdbc.username}" />   <property name="password" value="${slave.jdbc.password}" />   <!-- 检查数据库连接池中空闲连接的间隔时间,单位是分,默认值:240,如果要取消则设置为0 -->   <property name="idleConnectionTestPeriodInMinutes" value="10" />   <!-- 连接池中未使用的链接最大存活时间,单位是分,默认值:60,如果要永远存活设置为0 -->   <property name="idleMaxAgeInMinutes" value="10" />   <!-- 每个分区最大的连接数 -->   <property name="maxConnectionsPerPartition" value="20" />   <!-- 每个分区最小的连接数 -->   <property name="minConnectionsPerPartition" value="10" />   <!-- 分区数 ,默认值2,最小1,推荐3-4,视应用而定 -->   <property name="partitionCount" value="3" />   <!-- 每次去拿数据库连接的时候一次性要拿几个,默认值:2 -->   <property name="acquireIncrement" value="3" />   <!-- 缓存prepared statements的大小,默认值:0 -->   <property name="statementsCacheSize" value="50" />   <!-- 在做keep-alive的时候的SQL语句 -->   <property name="connectionTestStatement" value="select 1 from dual" />   <!-- 在每次到数据库取连接的时候执行的SQL语句,只执行一次 -->   <property name="initSQL" value="select 1 from dual" />   <property name="closeConnectionWatch" value="false" />   <property name="logStatementsEnabled" value="true" />   <property name="transactionRecoveryEnabled" value="true" />  </bean>  <bean id="masterDataSourceImpl" class="com.jolbox.bonecp.BoneCPDataSource" destroy-method="close">   <property name="driverClass" value="${jdbc.driver}" />   <property name="jdbcUrl" value="${master.jdbc.url}" />   <property name="username" value="${master.jdbc.username}" />   <property name="password" value="${master.jdbc.password}" />   <!-- 检查数据库连接池中空闲连接的间隔时间,单位是分,默认值:240,如果要取消则设置为0 -->   <property name="idleConnectionTestPeriodInMinutes" value="10" />   <!-- 连接池中未使用的链接最大存活时间,单位是分,默认值:60,如果要永远存活设置为0 -->   <property name="idleMaxAgeInMinutes" value="10" />   <!-- 每个分区最大的连接数 -->   <property name="maxConnectionsPerPartition" value="20" />   <!-- 每个分区最小的连接数 -->   <property name="minConnectionsPerPartition" value="10" />   <!-- 分区数 ,默认值2,最小1,推荐3-4,视应用而定 -->   <property name="partitionCount" value="3" />   <!-- 每次去拿数据库连接的时候一次性要拿几个,默认值:2 -->   <property name="acquireIncrement" value="3" />   <!-- 缓存prepared statements的大小,默认值:0 -->   <property name="statementsCacheSize" value="50" />   <!-- 在做keep-alive的时候的SQL语句 -->   <property name="connectionTestStatement" value="select 1 from dual" />   <!-- 在每次到数据库取连接的时候执行的SQL语句,只执行一次 -->   <property name="initSQL" value="select 1 from dual" />   <property name="closeConnectionWatch" value="false" />   <property name="logStatementsEnabled" value="true" />   <property name="transactionRecoveryEnabled" value="true" />  </bean>  <!-- DataSource/Master -->  <bean id="masterDataSource"   class="org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy">   <property name="targetDataSource" ref="masterDataSourceImpl" />  </bean>  <bean id="masterTransactionManager"   class="org.springframework.jdbc.datasource.DataSourceTransactionManager">   <property name="dataSource" ref="masterDataSource" />  </bean>  <bean id="masterTransactionTemplate"   class="org.springframework.transaction.support.TransactionTemplate">   <property name="transactionManager" ref="masterTransactionManager" />  </bean>  <!-- DataSource/Slave -->  <bean id="slaveDataSource"   class="org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy">   <property name="targetDataSource" ref="slaveDataSourceImpl" />  </bean>  <bean id="slaveTransactionManager"   class="org.springframework.jdbc.datasource.DataSourceTransactionManager">   <property name="dataSource" ref="slaveDataSource" />  </bean>  <bean id="slaveTransactionTemplate"   class="org.springframework.transaction.support.TransactionTemplate">   <property name="transactionManager" ref="slaveTransactionManager" />  </bean>  <!-- Mybatis/Master -->   <bean id="masterSqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">   <property name="dataSource" ref="masterDataSource"></property>   <property name="configLocation" value="classpath:mybatis.xml" />   <property name="typeAliasesPackage" value="cn.bridgeli.demo.entity" />   <property name="mapperLocations">    <list>     <value>classpath:cn/bridgeli/demo/mapper/master/*.xml</value>    </list>   </property>  </bean>  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">   <property name="basePackage" value="cn.bridgeli.demo.mapper.master" />   <property name="sqlSessionFactoryBeanName" value="masterSqlSessionFactory" />  </bean>  <!-- Mybatis/Slave -->  <bean id="slaveSqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">   <property name="dataSource" ref="slaveDataSource"></property>   <property name="configLocation" value="classpath:mybatis.xml" />   <property name="typeAliasesPackage" value="cn.bridgeli.demo.entity" />   <property name="mapperLocations">    <list>     <value>classpath:cn/bridgeli/demo/mapper/slave/*.xml</value>    </list>   </property>  </bean>  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">   <property name="basePackage" value="cn.bridgeli.demo.mapper.slave" />   <property name="sqlSessionFactoryBeanName" value="slaveSqlSessionFactory" />  </bean>  <!-- Configuration transaction advice -->  <tx:advice id="txAdvice" transaction-manager="masterTransactionManager">   <tx:attributes>    <tx:method name="add*" propagation="REQUIRED" />    <tx:method name="update*" propagation="REQUIRED" />    <tx:method name="delete*" propagation="REQUIRED" />    <tx:method name="get*" read-only="true" propagation="SUPPORTS" />    <tx:method name="list*" read-only="true" propagation="SUPPORTS" />   </tx:attributes>  </tx:advice>  <!-- Configuration transaction aspect -->  <aop:config>   <aop:pointcut id="systemServicePointcut"    expression="execution(* cn.bridgeli.demo.service.*.*(..))" />   <aop:advisor advice-ref="txAdvice" pointcut-ref="systemServicePointcut" />  </aop:config> </beans> 

这个配置文件老夫是完整的copy了下来,看起来也比较易懂,就不做解释了,需要说明的mybatis下那些dao的接口,分别对应cn.bridgeli.demo.mapper.master、cn.bridgeli.demo.mapper.slave,cn.bridgeli.demo.mapper.master下的这些dao接口是要写的,另一个是读的,这些接口对应的配置文件肯定就是他们对应的文件夹下面的xml文件了,在将来的项目中几乎可以照抄

4. mybatis的配置文件mybatis.xml

<?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>   <setting name="cacheEnabled" value="true" />   <setting name="lazyLoadingEnabled" value="true" />  </settings>  <plugins>   <plugin    interceptor="com.github.miemiedev.mybatis.paginator.OffsetLimitInterceptor">    <property name="dialectClass"     value="com.github.miemiedev.mybatis.paginator.dialect.MySQLDialect" />    <property name="asyncTotalCount" value="true" />   </plugin>  </plugins> </configuration> 

这个配置文件就一个分页,在前一篇文章中写过,就不多做解释了

5. 最后因为用的数据源的问题,就把pom.xml文件需要引入的几个依赖,也摘出如下

<dependency>   <groupId>com.jolbox</groupId>   <artifactId>bonecp</artifactId>   <version>0.8.0.RELEASE</version> </dependency>  <dependency>   <groupId>com.jolbox</groupId>   <artifactId>bonecp-spring</artifactId>   <version>0.8.0.RELEASE</version> </dependency>  <dependency>   <groupId>org.mariadb.jdbc</groupId>   <artifactId>mariadb-java-client</artifactId>   <version>1.1.7</version> </dependency> 

需要说明的我们用常见的c3p0或者dbcp的数据源也是可以的,至于本例中为什么用了这个没有听说过的jolbox(老夫是没听说过),老夫也不知道,知道他和常见的c3p0和dbcp有什么区别的请留言交流,谢谢