文章目录

  • spring框架实现读写分离
  • 1、思路
  • 2、读写分离的优点？
  • 3、读写分离在项目中如何使用？
  • 第一步：导入jar包，pom.xml
  • 第二步：配置config.properties
  • 第三步：log4j.properties文件
  • 第四步：spring-mvc.xml文件
  • 第五步：spring-mybatis.xml文件
  • 第六步：spring.xml文件
  • 第七步：DataSourceAdvice.java文件
  • 第八步：DataSourceSwitcher.java文件
  • 第九步：DynamicDataSource.java文件
  • 第十步：测试代码UserMapper.xml文件
  • 第十一步：UserMapper.java文件
  • 第十二步：IUserService的文件
  • 第十三步：UserServiceImpl.java文件
  • 第十四步：User.java实体类
  • 第十五步：TestUser.java的文件


spring框架实现读写分离

1、思路

第一种方法：思路是使用Spring AOP做数据源的切面来更换不同的读写数据库。对应的读写库使用LVS等负载器可以分发完成集群。
这种在应用层做读写分离，在项目中不是很好的控制。因为只能在程序中做控制。
参考文档

第二种方法：对于MySql而已，可以使用mysql-proxy或amoeba做中间件转发和读写分离，这不需要修改应用层的代码即可完成。
参考文档

2、读写分离的优点？

减少数据库压力，提高并发量。

3、读写分离在项目中如何使用？

项目结构图：

第一步：导入jar包，pom.xml

java Jedis是配置读写分离 java读写分离怎么实现_spring

pom.xml文件的源码：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.jk</groupId>
    <artifactId>dyjfc-master-slave</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>dyjfc-master-slave Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <!--引入spring-test对应的jar包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.5</version>
        </dependency>
        <!--引入spring-webmvc对应jar包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <!-- spring3 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <!--引入mybatis的jar包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.1.1</version>
        </dependency>
        <!--mybatis公司自己编写的mybatis与spring整合的jar包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!--引入junit对应的测试jar包 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <!--添加scope作用域为test时，只有测试的时候才引入jar包 -->
            <scope>test</scope>
        </dependency>
        <!--引入druid对应jar包 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.1</version>
        </dependency>
        <!--引入org.aspectj对应的jar包 -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.7.4</version>
        </dependency>
        <!--引入jackson-mapper-asl相应插件的jar包 -->
        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.9</version>
        </dependency>
        <!--引入commons-fileupload,文件上传时候用到的jar包 -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
        <!--引入javax.servlet对应jar包 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <!--引入log4j对应的jar包 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!-- oracle驱动 -->
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.2.0</version>
        </dependency>
        <!-- oracle驱动需要官方授权，不能再中央仓库直接下载 -->
        <!-- <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> 
            <version>11.2.0</version> <scope>system</scope> <systemPath>${project.basedir}/src/main/webapp/WEB-INF/lib/ojdbc6.jar</systemPath> 
            </dependency> -->
        <!--引入mysql-connector-java驱动包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.23</version>
        </dependency>
        <!--引入fastjson对应的jar包 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.7</version>
        </dependency>
        <!-- 加入jstl依赖包 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2.1-b03</version>
            <scope>provided</scope>
        </dependency>
        <!-- activity工作 -->
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-engine</artifactId>
            <version>5.16</version>
        </dependency>
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-spring</artifactId>
            <version>5.16</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-bpmn-converter</artifactId>
            <version>5.16</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.1</version>
        </dependency>
        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>3.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>3.2.0.RELEASE</version>
        </dependency>
        <!-- spring定时器 -->
        <dependency>
            <groupId>org.quartz-scheduler</groupId>
            <artifactId>quartz</artifactId>
            <version>2.2.2</version>
        </dependency>
        <!-- oscache缓存jar包 -->
        <dependency>
            <groupId>opensymphony</groupId>
            <artifactId>oscache</artifactId>
            <version>2.4</version>
        </dependency>
        <!-- maven配置httpclient jar包 -->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>commons-httpclient</groupId>
            <artifactId>commons-httpclient</artifactId>
            <version>3.0.1</version>
        </dependency>
        <!-- dom4j -->
        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-rt-frontend-jaxws</artifactId>
            <version>3.1.6</version>
        </dependency>
        <dependency>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-rt-transports-http</artifactId>
            <version>3.1.6</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>dyjfc-master-slave</finalName>
    </build>
</project>

第二步：配置config.properties

介绍下mysql数据库读写分离在spring,mybatis框架下的配置。
1.mysql连接配置文件config.properties
master.. 表示主数据库连接参数，负责增，删，改；
slave.. 表示从数据库连接参数，只负责读取；

config.properties配置文件的源码：

#hibernate.dialect=org.hibernate.dialect.OracleDialect
#driverClassName=oracle.jdbc.driver.OracleDriver
#validationQuery=SELECT 1 FROM DUAL
#jdbc_url=jdbc:oracle:thin:@localhost:1521:orcl
#jdbc_username=dyjfc
#jdbc_password=dyjfc

hibernate.dialect=org.hibernate.dialect.MySQLDialect
driverClassName=com.mysql.jdbc.Driver
validationQuery=SELECT 1
jdbc_url=jdbc:mysql://localhost:3306/sy?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
jdbc_username=sypro
jdbc_password=sypro

master.jdbc.driverClassName=com.mysql.jdbc.Driver  
master.jdbc.url=jdbc:mysql://127.0.0.1:3307/dyjfc?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
master.jdbc.username=root
master.jdbc.password=
  
slave.jdbc.driverClassName=com.mysql.jdbc.Driver  
slave.jdbc.url=jdbc:mysql://127.0.0.1:3308/dyjfc?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
slave.jdbc.username=root 
slave.jdbc.password=

#hibernate.dialect=org.hibernate.dialect.SQLServerDialect
#driverClassName=net.sourceforge.jtds.jdbc.Driver
#validationQuery=SELECT 1
#jdbc_url=jdbc:jtds:sqlserver://127.0.0.1:1433/sy
#jdbc_username=sa
#jdbc_password=123456

#hibernate.dialect=org.hibernate.dialect.DerbyDialect
#driverClassName=org.apache.derby.jdbc.EmbeddedDriver
#validationQuery=SELECT 1
#jdbc_url=jdbc:derby:sy;create=true
#jdbc_username=sypro
#jdbc_password=sypro

#jndiName=java:comp/env/dataSourceName

hibernate.hbm2ddl.auto=update
hibernate.show_sql=false
hibernate.format_sql=true

sessionInfoName=sessionInfo

uploadFieldName=filedata
uploadFileMaxSize=20971520
uploadFileExts=txt,rar,zip,doc,docx,xls,xlsx,jpg,jpeg,gif,png,swf,wmv,avi,wma,mp3,mid
uploadDirectory=attached

第三步：log4j.properties文件

log4j.properties文件的源码

log4j.rootLogger=DEBUG,Console,File

log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c]%m%n

log4j.appender.File=org.apache.log4j.RollingFileAppender 
log4j.appender.File.File=mybatis.log
log4j.appender.File.MaxFileSize=10MB
log4j.appender.File.Threshold=ALL
log4j.appender.File.layout=org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern=[%p][%d{yyyy-MM-dd HH\:mm\:ss,SSS}][%c]%m%n

第四步：spring-mvc.xml文件

配置文件spring-mvc.xml文件的源码：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" 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 
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

	<!-- 自动扫描controller包下的所有类，使其认为spring mvc的控制器 -->
	<context:component-scan base-package="com.jk.controller" />

	<!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
	<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
		<property name="supportedMediaTypes">
			<list>
				<value>text/html;charset=UTF-8</value>
			</list>
		</property>
	</bean>

	<!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->
	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
		<property name="messageConverters">
			<list>
				<ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
			</list>
		</property>
	</bean>

	<!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/" p:suffix=".jsp" />

	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="defaultEncoding">
			<value>UTF-8</value>
		</property>
		<property name="maxUploadSize">
			<value>32505856</value><!-- 上传文件大小限制为31M，31*1024*1024 -->
		</property>
		<property name="uploadTempDir">
            <value>/upload/</value><!--上传后的目录名-->
        </property>
		<property name="maxInMemorySize">
			<value>4096</value>
		</property>
	</bean>

	<!-- 拦截器 -->
	<!-- <mvc:interceptors>
		<mvc:interceptor>
			<mvc:mapping path="/**" />
			<bean class="com.jk.interceptors.SecurityInterceptor">
				不需要权限验证的地址
				<property name="excludeUrls">
					<list>
						<value>/initController/init</value>初始化数据库
						<value>/menuController/initTree</value>首页左侧功能菜单
						<value>/userController/userList</value>用户注册
						<value>/userController/login</value>用户登录
						<value>/userController/loginCombobox</value>用户登录里面的autocomplete功能
						<value>/userController/loginCombogrid</value>用户登录里面的combogrid功能
						<value>/userController/logout</value>注销登录
						<value>/resourceController/allTree</value>角色访问资源下拉树
						<value>/roleController/tree</value>用户访问角色树(只能看到自己拥有的角色)
						<value>/roleController/allTree</value>用户访问角色树
						<value>/userController/editCurrentUserPwdPage</value>用户修改自己的密码页面
						<value>/userController/editCurrentUserPwd</value>用户修改自己的密码
						<value>/userController/currentUserRolePage</value>查看自己的角色页面
						<value>/userController/currentUserResourcePage</value>查看自己的权限页面
					</list>
				</property>
			</bean>
		</mvc:interceptor>
	</mvc:interceptors> -->
</beans>

第五步：spring-mybatis.xml文件

spring-mybatis.xml的源码：

<?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" xmlns:task="http://www.springframework.org/schema/task" 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
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-3.1.xsd
">

	<!-- JNDI方式配置数z据源 -->
	<!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> -->
	<!-- 开启注解定时器任务 -->
    <task:annotation-driven/>
    <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
       <bean id="schedulerFactoryBean" class="org.springframework.scheduling.quartz.SchedulerFactoryBean" >
    </bean>

	<!-- 配置数据源 -->
	<bean name="parentDataSource" class="com.alibaba.druid.pool.DruidDataSource" >
		
	</bean>

	 <!-- 主数据源-->  
    <bean id="masterDataSource" parent="parentDataSource">  
        <property name="url" value="${master.jdbc.url}" />
		<property name="username" value="${master.jdbc.username}" />
		<property name="password" value="${master.jdbc.password}" /> 
    </bean>  
    <!-- 从数据源-->  
    <bean id="slaveDataSource" parent="parentDataSource">  
        <property name="url" value="${slave.jdbc.url}" />
		<property name="username" value="${slave.jdbc.username}" />
		<property name="password" value="${slave.jdbc.password}" />   
    </bean>  
  
    <bean id="dataSource" class="com.jk.aop.DynamicDataSource">  
        <property name="targetDataSources">  
            <map key-type="java.lang.String">  
                <entry key="slave" value-ref="slaveDataSource" />  
            </map>  
        </property>  
        <property name="defaultTargetDataSource" ref="masterDataSource" />  
    </bean> 

	<!-- myBatis文件 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<!-- 自动扫描entity目录, 省掉Configuration.xml里的手工配置 -->
		<property name="mapperLocations" value="classpath:mapping/*.xml" />
	</bean>

	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.jk.dao" />
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
	</bean>

	<!-- 切换数据源 -->  
    <bean id="dataSourceAdvice" class="com.jk.aop.DataSourceAdvice" />  
    <aop:config>  
        <aop:advisor  
            pointcut="execution(* com.jk.service..*Impl.*(..))"  
            advice-ref="dataSourceAdvice" />  
    </aop:config>  
    
	<!-- 配置事务管理器 -->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource" />
	</bean>

	<!-- 注解方式配置事物 -->
	<!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->

	<!-- 拦截器方式配置事物 -->
	<tx:advice id="transactionAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<tx:method name="add*" propagation="REQUIRED" />
			<tx:method name="append*" propagation="REQUIRED" />
			<tx:method name="insert*" propagation="REQUIRED" />
			<tx:method name="save*" propagation="REQUIRED" />
			<tx:method name="update*" propagation="REQUIRED" />
			<tx:method name="modify*" propagation="REQUIRED" />
			<tx:method name="edit*" propagation="REQUIRED" />
			<tx:method name="delete*" propagation="REQUIRED" />
			<tx:method name="remove*" propagation="REQUIRED" />
			<tx:method name="repair" propagation="REQUIRED" />
			<tx:method name="delAndRepair" propagation="REQUIRED" />

			<tx:method name="get*" propagation="SUPPORTS" />
			<tx:method name="find*" propagation="SUPPORTS" />
			<tx:method name="load*" propagation="SUPPORTS" />
			<tx:method name="search*" propagation="SUPPORTS" />
			<tx:method name="datagrid*" propagation="SUPPORTS" />

			<tx:method name="*" propagation="SUPPORTS" />
		</tx:attributes>
	</tx:advice>
	<aop:config>
		<aop:pointcut id="transactionPointcut" expression="execution(* com.jk.service..*Impl.*(..))" />
		<aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" />
	</aop:config>


	<!-- 配置druid监控spring jdbc -->
	<bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
	</bean>
	<bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype">
		<property name="patterns">
			<list>
				<value>com.jk.service.*</value>
			</list>
		</property>
	</bean>
	<aop:config>
		<aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" />
	</aop:config>

</beans>

第六步：spring.xml文件

spring.xml文件的源码：

<?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
">

	<!-- 引入属性文件 -->
	<context:property-placeholder location="classpath:config.properties" />

	<!-- 自动扫描(自动注入) -->
	<context:component-scan base-package="com.jk.service" />

	<!-- <context:component-scan base-package="com.jk.test" /> -->
</beans>

第七步：DataSourceAdvice.java文件

DataSourceAdvice.java文件的源码：

package com.jk.aop;

import java.lang.reflect.Method;

import org.springframework.aop.AfterReturningAdvice;
import org.springframework.aop.MethodBeforeAdvice;
import org.springframework.aop.ThrowsAdvice;

public class DataSourceAdvice implements MethodBeforeAdvice, AfterReturningAdvice, ThrowsAdvice{

	// service方法执行之前被调用  
    public void before(Method method, Object[] args, Object target) throws Throwable {  
        System.out.println("切入点: " + target.getClass().getName() + "类中" + method.getName() + "方法");  
        if(method.getName().startsWith("add")   
            || method.getName().startsWith("create")  
            || method.getName().startsWith("save")  
            || method.getName().startsWith("edit")  
            || method.getName().startsWith("update")  
            || method.getName().startsWith("delete")  
            || method.getName().startsWith("remove")){  
            System.out.println("切换到: master");  
            DataSourceSwitcher.setMaster();  
        }  
        else  {  
        	
        	 if(method.getName().startsWith("find1")  
        	           ){  
        	            System.out.println("切换到: master");  
        	            DataSourceSwitcher.setSlaveall("数码IP:181283132");   
        	        } 
        	 
        	 
        	 if( method.getName().startsWith("find2")  
     	            ){  
     	            System.out.println("切换到: master");  
     	           DataSourceSwitcher.setSlaveall("IP衣服:181283132");  
     	        } 
            
        }  
    }  
  
    // service方法执行完之后被调用  
    public void afterReturning(Object arg0, Method method, Object[] args, Object target) throws Throwable {  
    }  
  
    // 抛出Exception之后被调用  
    public void afterThrowing(Method method, Object[] args, Object target, Exception ex) throws Throwable {  
        DataSourceSwitcher.setSlave();  
        System.out.println("出现异常,切换到: slave");  
    }  

}

第八步：DataSourceSwitcher.java文件

DataSourceSwitcher.java的源码：

package com.jk.aop;

import org.springframework.util.Assert;

public class DataSourceSwitcher {

	@SuppressWarnings("rawtypes")  
    private static final ThreadLocal contextHolder = new ThreadLocal();  
  
    @SuppressWarnings("unchecked")  
    public static void setDataSource(String dataSource) {  
        Assert.notNull(dataSource, "dataSource cannot be null");  
        contextHolder.set(dataSource);  
    }  
  
    public static void setMaster(){  
        clearDataSource();  
    }  
      
    public static void setSlave() {  
        setDataSource("slave");  
    }    
    
    public static void setSlaveall(String key) {  
        setDataSource(key);  
    }  
     
    public static String getDataSource() {  
        return (String) contextHolder.get();  
    }  
  
    public static void clearDataSource() {  
        contextHolder.remove();  
    }  
}

第九步：DynamicDataSource.java文件

DynamicDataSource.java文件的源码：

package com.jk.aop;

import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;

public class DynamicDataSource extends AbstractRoutingDataSource{

	@Override
	protected Object determineCurrentLookupKey() {
		return DataSourceSwitcher.getDataSource();  
	}

}

第十步：测试代码UserMapper.xml文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.jk.dao.UserMapper">
    <resultMap id="BaseResultMap" type="com.jk.model.User">
        <id column="ID" property="id" jdbcType="VARCHAR"/>
        <result column="NAME" property="name" jdbcType="VARCHAR"/>
        <result column="PWD" property="pwd" jdbcType="VARCHAR"/>
        <result column="CREATEDATETIME" property="createdatetime" jdbcType="TIMESTAMP"/>
        <result column="MODIFYDATETIME" property="modifydatetime" jdbcType="TIMESTAMP"/>
    </resultMap>
    <sql id="Base_Column_List">
    ID, NAME, PWD, CREATEDATETIME, MODIFYDATETIME
  </sql>

    <!-- 添加用户 -->
    <insert id="insert" parameterType="com.jk.model.User">
 	INSERT INTO tuser (ID, NAME, PWD, CREATEDATETIME, MODIFYDATETIME) VALUES 
 		(#{id}, #{name}, #{pwd}, #{createdatetime}, #{modifydatetime})
 </insert>

    <!-- 删除用户 -->
    <delete id="deleteUser" parameterType="com.jk.model.User">
 	DELETE FROM tuser WHERE ID = #{id}
 </delete>

    <!-- 修改用户 -->
    <update id="updateUser" parameterType="com.jk.model.User">
        UPDATE tuser
        <set>
            <if test="name != null">
                NAME = #{name},
            </if>
            <if test="pwd != null">
                PWD = #{pwd},
            </if>
            <if test="createdatetime != null">
                CREATEDATETIME = #{createdatetime},
            </if>
            <if test="modifydatetime != null">
                MODIFYDATETIME = #{modifydatetime},
            </if>
        </set>
        WHERE ID = #{id}
    </update>

    <!-- 查询用户信息列表 -->
    <select id="userList" resultMap="BaseResultMap" parameterType="com.jk.model.User">
 	SELECT ID, NAME, PWD, CREATEDATETIME, MODIFYDATETIME FROM tuser
 </select>

</mapper>

第十一步：UserMapper.java文件

UserMapper.java文件的源码：

package com.jk.dao;

import java.util.List;
import java.util.Map;

import com.jk.model.User;

public interface UserMapper {

	/**
	 * <pre>userList(查询用户列表信息)   
	 * 创建人：杨志超 yangzhichao150@126.com    
	 * 创建时间：2016年9月8日 下午2:50:48    
	 * 修改人：杨志超 yangzhichao150@126.com     
	 * 修改时间：2016年9月8日 下午2:50:48    
	 * 修改备注： 
	 * @param user
	 * @return
	 * @throws Exception</pre>
	 */
	public List<User> userList(User user) throws Exception;
	
	/**
	 * <pre>saveUser(添加用户信息)   
	 * 创建人：杨志超 yangzhichao150@126.com    
	 * 创建时间：2016年9月8日 下午2:51:05    
	 * 修改人：杨志超 yangzhichao150@126.com     
	 * 修改时间：2016年9月8日 下午2:51:05    
	 * 修改备注： 
	 * @param user
	 * @throws Exception</pre>
	 */
	public void insert(User user) throws Exception;
	
	public void updateUser(User user) throws Exception;
	
	public void deleteUser(User user) throws Exception;
}

第十二步：IUserService的文件

IUserService.java文件的源码：

package com.jk.service;

import java.util.List;

import com.jk.model.User;

public interface IUserService {

	/**
	 * <pre>userList(查询用户列表信息)   
	 * 创建人：杨志超 yangzhichao150@126.com    
	 * 创建时间：2016年9月8日 下午2:58:31    
	 * 修改人：杨志超 yangzhichao150@126.com     
	 * 修改时间：2016年9月8日 下午2:58:31    
	 * 修改备注： 
	 * @param user
	 * @return
	 * @throws Exception</pre>
	 */
	public List<User> userList(User user) throws Exception;
	
	/**
	 * <pre>saveUser(添加用户信息)   
	 * 创建人：杨志超 yangzhichao150@126.com    
	 * 创建时间：2016年9月8日 下午2:59:01    
	 * 修改人：杨志超 yangzhichao150@126.com     
	 * 修改时间：2016年9月8日 下午2:59:01    
	 * 修改备注： 
	 * @param user
	 * @throws Exception</pre>
	 */
	public void saveUser(User user) throws Exception;
}

第十三步：UserServiceImpl.java文件

UserServiceImpl.java文件的源码：

package com.jk.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.jk.dao.UserMapper;
import com.jk.model.User;
import com.jk.service.IUserService;

@Service("userService")
public class UserServiceImpl implements IUserService {

	@Autowired
	private UserMapper userDao;
	
	@Override
	public List<User> userList(User user) throws Exception {
		List<User> userList = userDao.userList(user);
		return userList;
	}
	
	@Override
	public void saveUser(User user) throws Exception {
		userDao.insert(user);
	}

}

第十四步：User.java实体类

User.java的源码：

package com.jk.model;

import java.io.Serializable;
import java.util.Date;

public class User implements Serializable {

	private static final long serialVersionUID = 5294240072221941561L;

	private String id;
	
	private String name;
	
	private String pwd;
	
	private Date createdatetime;
	
	private Date modifydatetime;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getPwd() {
		return pwd;
	}

	public void setPwd(String pwd) {
		this.pwd = pwd;
	}

	public Date getCreatedatetime() {
		return createdatetime;
	}

	public void setCreatedatetime(Date createdatetime) {
		this.createdatetime = createdatetime;
	}

	public Date getModifydatetime() {
		return modifydatetime;
	}

	public void setModifydatetime(Date modifydatetime) {
		this.modifydatetime = modifydatetime;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		User other = (User) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		return true;
	}

	@Override
	public String toString() {
		return "User [id=" + id + ", name=" + name + ", pwd=" + pwd
				+ ", createdatetime=" + createdatetime + ", modifydatetime="
				+ modifydatetime + "]";
	}
	
}

第十五步：TestUser.java的文件

TestUser.java文件的源码：

package com.jk.test;

import java.util.List;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.alibaba.fastjson.JSON;
import com.jk.model.User;
import com.jk.service.IUserService;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:spring.xml","classpath:spring-mybatis.xml"})
public class TestUser {

	@Autowired
	private IUserService userService;
	
	@Test
	public void userList() {
		User user = new User();
		try {
			List<User> userList = userService.userList(user);
			System.out.println(JSON.toJSONStringWithDateFormat(userList, "yyyy-MM-dd HH:mm:ss"));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
//	
//	@Test
//	public void saveUser() {
//		User user = new User();
//		user.setId(UUID.randomUUID().toString());
//		user.setName("admin");
//		user.setPwd("admin");
//		user.setCreatedatetime(new Date());
//		user.setModifydatetime(new Date());
//		try {
//			userService.saveUser(user);
//			System.out.println("添加成功！");
//		} catch (Exception e) {
//			e.printStackTrace();
//		}
//	}
	
}

测试成功！

Spring+Hibernate框架下MySql读写分离，主从数据库配置