SSM配置动态数据源
多数据源配置主要涉及自定义类（DataSource注解类、DataSourceAspect切面类，动态数据源接口实现类、以及数据源字符串线程保存类），pom.xml文件、applicationContext.xml、mybatis相关配置，以及业务代码(test包)，参考实际开发及网上资料记录下来。
一、配置文件
1.pom.xml
这里我用的是mac上的eclipse，maven版本是3.6.0，jdk版本是1.8，tomcat9。pom文件配置如下:
<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>laboratory</groupId>
<artifactId>mvclab</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>mcv Maven Webapp</name>
<url>http://maven.apache.org</url> <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<spring.version>5.1.5.RELEASE</spring.version>
<mybatis.version>3.2.8</mybatis.version>
<mybatis-spring.version>1.2.2</mybatis-spring.version>
<spring-jpa-version>1.3.2.RELEASE</spring-jpa-version>
</properties> <dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency> <!--spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--日志-->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency> <!--tomcat所需jar包-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency> <dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.24</version>
</dependency> <dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.2.2</version>
</dependency> <!--返回object对象所需要的依赖，它在<mvc:annotation-driven>注册时注入-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>RELEASE</version>
<scope>compile</scope>
</dependency> <!-- 补充 -->
<!-- https://mvnrepository.com/artifact/aopalliance/aopalliance -->
<dependency>
<groupId>aopalliance</groupId>
<artifactId>aopalliance</artifactId>
<version>1.0</version>
</dependency> <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.13</version>
</dependency> <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjrt -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.8.9</version>
</dependency> <!-- MyBatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis-spring.version}</version>
</dependency>
<!-- dbcp数据源 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency> <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.26</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.20</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>mcv</finalName>
</build>
</project>
2.applicationContext.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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd"> <!-- context:设置注解扫描包注解
注: 如果springmvc-servlet中扫描注解没有排除@Service注解，这里要设置扫描除@Controller之外的其它所有注解
-->
<context:component-scan base-package="com.mvc">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
<!-- 自定义异常处理 -->
<context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice" />
</context:component-scan> <!-- 开启@Autowired注解扫描
注: 它等价于<bean class="org.springframework.beans.factory.annotation. AutowiredAnnotationBeanPostProcessor "/>
注: 配置了<context:component-scan />，默认包含对@Autowired的配置，因此下面这个配置就不需要了
-->
<context:annotation-config/> <!-- 注册数据源配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties" />
<!-- 注册数据源对象 这里用Spring内置数据源 -->
<bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName">
<value>${oracle11g.driverClass}</value>
</property>
<property name="url">
<value>${oracle11g.url}</value>
</property>
<property name="username">
<value>${oracle11g.username}</value>
</property>
<property name="password">
<value>${oracle11g.password}</value>
</property>
<property name="maxActive">
<value>${oracle11g.maxActive}</value>
</property>
<property name="maxIdle">
<value>${oracle11g.maxIdle}</value>
</property>
<property name="maxWait">
<value>${oracle11g.maxWait}</value>
</property>
<property name="defaultAutoCommit">
<value>${oracle11g.defaultAutoCommit}</value>
</property>
<property name="timeBetweenEvictionRunsMillis">
<value>${oracle11g.timeBetweenEvictionRunsMillis}</value>
</property>
<property name="minEvictableIdleTimeMillis">
<value>${oracle11g.minEvictableIdleTimeMillis}</value>
</property>
</bean>
<bean id="dataSource2" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName">
<value>${oracle11g-1.driverClass}</value>
</property>
<property name="url">
<value>${oracle11g-1.url}</value>
</property>
<property name="username">
<value>${oracle11g-1.username}</value>
</property>
<property name="password">
<value>${oracle11g-1.password}</value>
</property>
<property name="maxActive">
<value>${oracle11g-1.maxActive}</value>
</property>
<property name="maxIdle">
<value>${oracle11g-1.maxIdle}</value>
</property>
<property name="maxWait">
<value>${oracle11g-1.maxWait}</value>
</property>
<property name="defaultAutoCommit">
<value>${oracle11g-1.defaultAutoCommit}</value>
</property>
<property name="timeBetweenEvictionRunsMillis">
<value>${oracle11g-1.timeBetweenEvictionRunsMillis}</value>
</property>
<property name="minEvictableIdleTimeMillis">
<value>${oracle11g-1.minEvictableIdleTimeMillis}</value>
</property>
</bean>
<!-- 配置动态数据源 -->
<bean id="dynamicDataSource" class="com.mvc.dynamicDataSource.DynamicDataSource">
<property name="targetDataSources">
<map key-type="java.lang.String">
<!-- 指定lookupKey和与之对应的数据源 -->
<entry key="dataSource1" value-ref="dataSource1" />
<entry key="dataSource2" value-ref="dataSource2" />
</map>
</property>
<!-- 指定默认的数据源 -->
<property name="defaultTargetDataSource" ref="dataSource1" />
</bean> <!-- 配置事务管理对象,注意这里设置的是dataSource1而不是dynamicDataSource-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource1" />
</bean>
<!-- 将所有具有@Transactional注解的Bean自动配置为声明式事务支持 -->
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/> <!-- MyBatis 数据源和sql- -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dynamicDataSource"/>
<property name="mapperLocations" value="classpath:/mappings/**/*.xml"/>
<property name="configLocation" value="classpath:/mybatis-config.xml"></property>
</bean>
<!-- MyBayis 扫描器配置-->
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<property name="basePackage" value="com.mvc.laboratory"/>
</bean> <!--接收json数据-->
<bean id="jsonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean> <!-- 配置事务自动代理 -->
<aop:aspectj-autoproxy proxy-target-class="true" />
</beans>
3.mybatis-config.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>
<!-- 全局参数 -->
<settings>
<!-- 使全局的映射器启用或禁用缓存。 -->
<setting name="cacheEnabled" value="true"/>
<!-- 全局启用或禁用延迟加载。当禁用时，所有关联对象都会即时加载。 -->
<setting name="lazyLoadingEnabled" value="true"/>
<!-- 当启用时，有延迟加载属性的对象在被调用时将会完全加载任意属性。否则，每种属性将会按需要加载。 -->
<setting name="aggressiveLazyLoading" value="true"/>
<!-- 是否允许单条sql 返回多个数据集 (取决于驱动的兼容性) default:true -->
<setting name="multipleResultSetsEnabled" value="true"/>
<!-- 是否可以使用列的别名 (取决于驱动的兼容性) default:true -->
<setting name="useColumnLabel" value="true"/>
<!-- 允许JDBC 生成主键。需要驱动器支持。如果设为了true，这个设置将强制使用被生成的主键，有一些驱动器不兼容不过仍然可以执行。 default:false -->
<setting name="useGeneratedKeys" value="false"/>
<!-- 指定 MyBatis 如何自动映射 数据基表的列 NONE：不隐射 PARTIAL:部分 FULL:全部 -->
<setting name="autoMappingBehavior" value="PARTIAL"/>
<!-- 这是默认的执行类型 （SIMPLE: 简单； REUSE: 执行器可能重复使用prepared statements语句；BATCH: 执行器可以重复执行语句和批量更新） -->
<setting name="defaultExecutorType" value="SIMPLE"/>
<!-- 使用驼峰命名法转换字段。
<setting name="mapUnderscoreToCamelCase" value="true"/>
-->
<!-- 设置本地缓存范围 session:就会有数据的共享 statement:语句范围 (这样就不会有数据的共享 ) defalut:session -->
<setting name="localCacheScope" value="SESSION"/>
<!-- 设置但JDBC类型为空时,某些驱动程序 要指定值,default:OTHER，插入空值时不需要指定类型 -->
<setting name="jdbcTypeForNull" value="NULL"/>
<!-- mybatis打印日志 -->
<!-- <setting name="logImpl" value="STDOUT_LOGGING" /> -->
<setting name="logImpl" value="NO_LOGGING" />
</settings> <!-- 类型别名 -->
<typeAliases>
</typeAliases> </configuration>
4.jdbc.properties和log4j.properties
这里我用的是oracle，在mac上用docker起了两个oracle数据库镜像，端口分别映射到本地mac的1521和1522，并且各自建了apple账号。
# docker ps --> oracle11g
oracle11g.driverClass=oracle.jdbc.driver.OracleDriver
oracle11g.url=jdbc:oracle:thin:@127.0.0.1:1521:helowin
oracle11g.username=apple
oracle11g.password=1234
oracle11g.maxActive=100
oracle11g.maxIdle=40
oracle11g.maxWait=3000
oracle11g.defaultAutoCommit=true
oracle11g.timeBetweenEvictionRunsMillis=3600000
oracle11g.minEvictableIdleTimeMillis=3600000 # docker ps --> oracle11g-1
oracle11g-1.driverClass=oracle.jdbc.driver.OracleDriver
oracle11g-1.url=jdbc:oracle:thin:@127.0.0.1:1522:helowin
oracle11g-1.username=apple
oracle11g-1.password=1234
oracle11g-1.maxActive=100
oracle11g-1.maxIdle=40
oracle11g-1.maxWait=3000
oracle11g-1.defaultAutoCommit=true
oracle11g-1.timeBetweenEvictionRunsMillis=3600000
oracle11g-1.minEvictableIdleTimeMillis=3600000
log4j.rootCategory=info, CONSOLE, DAILY
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%-5p[%F:%M:%L]- %m%n
log4j.appender.DAILY=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DAILY.DatePattern='.'yyyy-MM-dd
log4j.appender.DAILY.ImmediateFlush=true
log4j.appender.DAILY.Append=true
log4j.appender.DAILY.layout=org.apache.log4j.PatternLayout
log4j.appender.DAILY.layout.conversionPattern=[ %-5p]-%-d{yyyyMMdd HHmmss}-[%F:%M:%L]- %m%n
log4j.appender.DAILY.File=../logs/mvc.log
5.springmvc.xml配置
<?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"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
<mvc:annotation-driven>
<!-- 解决乱码 -->
<mvc:message-converters register-defaults="true">
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<constructor-arg value="UTF-8" />
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
<!-- 设置注解扫描目录
注意，在springmvc-servlet中排除了@Service注解,它等价于在applicationContext.xml中排除@Controller注解
SpringMVC中扫描controller而不是@Service，因为此时service还没有进行事务处理可能会引起事务失效
-->
<context:component-scan base-package="com.mvc" >
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service" />
</context:component-scan> <!-- 静态资源访问控制 -->
<mvc:resources mapping="/images/**" location="/images/" />
<mvc:resources mapping="/js/**" location="/js/" />
<mvc:resources mapping="/css/**" location="/css/" />
</beans>
springmvc.xml
6.web.xml配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0"
> <display-name>Archetype Created Web Application</display-name>
<!-- 注册ApplicationContext容器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> <!--注册中央调度器-->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping> <welcome-file-list>
<welcome-file>index.jsp</welcome-file>
<welcome-file>welcome.jsp</welcome-file>
</welcome-file-list> <!--解决requesMapping请求参数中的中文乱码-->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
web.xml
二、自定义类
1.DataSource
package com.mvc.dynamicDataSource; import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target; @Target({ ElementType.TYPE,ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface DataSource {
String value() default DataSource.dataSource1;
public static String dataSource1 = "dataSource1";
public static String dataSource2 = "dataSource2";
}
2.DataSourceAspect
package com.mvc.dynamicDataSource; import java.lang.reflect.Method; import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component; @Component
@Aspect
@Order(1)
public class dataSourceAspect { @Pointcut(value="execution(* com.mvc.laboratory..*.*(..))")
private void doPointcut() {}; @Before(value = "doPointcut()")
@After(value = "doPointcut()")
public void intercept(JoinPoint joinPoint) throws NoSuchMethodException {
// 获取切入点的类反射
Class<?> targetClass = joinPoint.getTarget().getClass();
// 获取方法参数
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
for (Class<?> clazz:targetClass.getInterfaces()){
dealDataSource(clazz, signature.getMethod());
}
// 默认使用目标类的注解，如果没有则使用其实现的接口注解
dealDataSource(targetClass, signature.getMethod());
} private void dealDataSource(Class<?> clazz, Method method) throws NoSuchMethodException {
// 获取方法参数
Class<?>[] paramTypeArr = method.getParameterTypes();
// 检查是否为dataSource注解
if (clazz.isAnnotationPresent(DataSource.class)){
// 获取注解对象
DataSource source = clazz.getAnnotation(DataSource.class);
DynamicDataSourceHolder.setDataSource(source.value());
}
Method m = clazz.getMethod(method.getName(), paramTypeArr);
if (m != null && m.isAnnotationPresent(DataSource.class)) {
DataSource source = m.getAnnotation(DataSource.class);
DynamicDataSourceHolder.setDataSource(source.value());
}
}
}
3.DynamicDataSource
package com.mvc.dynamicDataSource; import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource; /**
* 通过重写这个查找数据源标识的方法就可以让spring切换到指定的数据源 *
*/
public class DynamicDataSource extends AbstractRoutingDataSource{
@Override
protected Object determineCurrentLookupKey() {
// 从自定义的位置获取数据源标识
return DynamicDataSourceHolder.getDataSource();
}
}
4.DynamicDataSourceHolder
package com.mvc.dynamicDataSource; /**
* 用于持有当前线程中使用的数据源标识
*/
public class DynamicDataSourceHolder {
// 注意：数据源标识保存在线程变量中，避免多线程操作数据源时互相干扰
private static final ThreadLocal<String> THREAD_DATA_SOURCE = new ThreadLocal<>(); public static String getDataSource() {
return THREAD_DATA_SOURCE.get();
}
public static void setDataSource(String dataSource) {
THREAD_DATA_SOURCE.set(dataSource);
}
public static void clearDataSource() {
THREAD_DATA_SOURCE.remove();
}
}
三、业务代码
1.TestController
package com.mvc.laboratory.test; import java.util.List;
import java.util.Map; import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody; @Controller
@RequestMapping(value = "/test")
public class TestController { @Resource
private TestService testService; /**
* @see http://localhost:8080/mvclab/test/testAspectJAround?name=weiweian&age=123
* @param name
* @param age
* @return
*/
@RequestMapping(value = "/testAspectJAround")
@ResponseBody
public List<Map<String, String>> testAspectJArounds(HttpServletRequest request, String name, String age){
List<Map<String, String>> map = testService.testAspectJAround(request, name, age);
return map;
}
/**
* @see http://localhost:8080/mvclab/test/testDynamicDataSource
* @param request
* @return
*/
@RequestMapping(value = "/testDynamicDataSource")
@ResponseBody
public List<Map<String, String>> testDynamicDataSource(HttpServletRequest request){
List<Map<String, String>> map = testService.testDynamicDataSource(request);
return map;
}
}
2.TestService
package com.mvc.laboratory.test; import java.util.List;
import java.util.Map; import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional; @Service
@Transactional(rollbackFor = Exception.class)
public class TestService { @Resource
private LoggerDao loggerDao;
@Resource
private TestDao testDao; public List<Map<String, String>> testAspectJAround(HttpServletRequest request, String name, String age) {
List<Map<String, String>> map = loggerDao.test();
return map;
} public List<Map<String, String>> testDynamicDataSource(HttpServletRequest request) {
List<Map<String, String>> map = testDao.dynamicDataSource();
return map;
}
}
3.LoggerDao
package com.mvc.laboratory.test; import java.util.Date;
import java.util.List;
import java.util.Map; import org.apache.ibatis.annotations.Param; import com.mvc.dynamicDataSource.DataSource; @DataSource(DataSource.dataSource1)
public interface LoggerDao {
public List<Map<String, String>> test();
}
4.TestDao
package com.mvc.laboratory.test; import java.util.List;
import java.util.Map; import com.mvc.dynamicDataSource.DataSource; @DataSource(DataSource.dataSource2)
public interface TestDao {
public List<Map<String, String>> dynamicDataSource();
}
5.logger.xml和test.xml
参考applicationcontext.xml中关于mabatis的配置，目录为resources/mappings/test/logger.xml
<?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.mvc.laboratory.test.LoggerDao"> <select id="test" resultType="java.util.Map">
select
url,
intfname,
sign,
to_char(begin_time) as begin_time,
to_char(end_time) as end_time,
result
from intf_caller_log
</select> </mapper>
<?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.mvc.laboratory.test.TestDao"> <select id="dynamicDataSource" resultType="java.util.Map">
select * from test
</select> </mapper>
6.intf_caller_log和test表
参考LoggerDao的注解，intf_caller_log表位于dataSource1数据源对应的数据库中，test表位于dataSource2数据源对应的数据库中，两个表只是查询，可自由创建。
四、测试
1.单元测试
在test/mvc路径下新建测试类，内容如下：
package mvc; import java.util.List;
import java.util.Map; import javax.annotation.Resource; import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.annotation.Transactional; import com.mvc.laboratory.test.LoggerDao;
import com.mvc.laboratory.test.TestDao; @RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath:applicationContext.xml"})
@Transactional(rollbackFor = Exception.class)
public class DynamicDataSourceTest { @Resource
private LoggerDao loggerDao; @Resource
private TestDao testDao; @Test
public void loggerTest() {
List<Map<String, String>> map = loggerDao.test();
for (int i = 0; i < map.size(); i++) {
System.out.println(map.get(i));
}
} @Test
public void dynamicDataSourceTest() {
List<Map<String, String>> map = testDao.dynamicDataSource();
for (int i = 0; i < map.size(); i++) {
System.out.println(map.get(i));
}
}
}
分别执行两个方法（run as junit，可在run configuration中配置要执行的方法及junit版本(这里是4)），打印如下：
...
{INTFNAME=@82c0502, END_TIME=2019-06-26 09:44:04.0, BEGIN_TIME=2019-06-26 09:44:04.0, ID=8C312E309096C199E05011AC02001066, SIGN=1, RESULT={sayHello=hello, my name is weiweian, 123 years old., name=weiweian, age=123}, URL=/mvclab/test/example1}
{INTFNAME=@784a89d9, END_TIME=2019-06-26 10:09:43.0, BEGIN_TIME=2019-06-26 10:09:43.0, ID=8C3189ED0639F220E05011AC0200107C, SIGN=1, RESULT={sayHello=hello, my name is weiweian, 123 years old., name=weiweian, age=123}, URL=/mvclab/test/testAspectJAround}
{INTFNAME=@349f84fe, END_TIME=2019-06-26 10:40:22.0, BEGIN_TIME=2019-06-26 10:40:22.0, ID=8C31F7934D601BCFE05011AC02001092, SIGN=1, RESULT={sayHello=hello, my name is weiweian, 123 years old., name=weiweian, age=123}, URL=/mvclab/test/testAspectJAround}
...
...
{ID=8C31D356D681E364E05011AC03000F08, NAME=Alex, AGE=20}
{ID=8C31D356D682E364E05011AC03000F08, NAME=An, AGE=18}
...
可见，intf_caller_log表中的记录和test表中的记录都能正常查询出来。查询其它表也应该是相应的数据。
2.发布到tomcat测试
分别访问controller中的测试路径，页面显示如下：
[
{
"INTFNAME": "@3507200d",
"END_TIME": "26-6月 -19",
"BEGIN_TIME": "26-6月 -19",
"SIGN": "1",
"RESULT": "{sayHello=hello, my name is weiweian, 123 years old., name=weiweian, age=123}",
"URL": "/mvclab/test/testAspectJAround"
},
{
"INTFNAME": "@3507200d",
"END_TIME": "26-6月 -19",
"BEGIN_TIME": "26-6月 -19",
"SIGN": "1",
"RESULT": "{sayHello=hello, my name is weiweian, 123 years old., name=weiweian, age=123}",
"URL": "/mvclab/test/testAspectJAround"
},
...
[
{
"ID": "8C31D356D681E364E05011AC03000F08",
"NAME": "Alex",
"AGE": "20"
},
{
"ID": "8C31D356D682E364E05011AC03000F08",
"NAME": "An",
"AGE": "18"
}
]
五、Hibernate事务管理配置多数据源
只修改pom.xml添加相关jar包，以及application.xml添加Hibernate事务管理，其它和上述一样不变。
1.pom.xml
添加hibernate相关jar包
<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>laboratory</groupId>
<artifactId>mvclab</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>mcv Maven Webapp</name>
<url>http://maven.apache.org</url> <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<spring.version>5.1.5.RELEASE</spring.version>
<mybatis.version>3.2.8</mybatis.version>
<mybatis-spring.version>1.2.2</mybatis-spring.version>
<spring-jpa-version>1.3.2.RELEASE</spring-jpa-version>
</properties> <dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency> <!--spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--日志-->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency> <!--tomcat所需jar包-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency> <dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.24</version>
</dependency> <dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.2.2</version>
</dependency>
<!-- Spring JPA dependencies -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>${spring-jpa-version}</version>
</dependency> <!-- Hibernate dependencies -->
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.4.2.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.4.2.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate.javax.persistence/hibernate-jpa-2.0-api -->
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
</dependency> <!--返回object对象所需要的依赖，它在<mvc:annotation-driven>注册时注入-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>RELEASE</version>
<scope>compile</scope>
</dependency> <!-- 补充 -->
<!-- https://mvnrepository.com/artifact/aopalliance/aopalliance -->
<dependency>
<groupId>aopalliance</groupId>
<artifactId>aopalliance</artifactId>
<version>1.0</version>
</dependency> <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.13</version>
</dependency> <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjrt -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.8.9</version>
</dependency> <!-- MyBatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis-spring.version}</version>
</dependency>
<!-- dbcp数据源 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency> <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.26</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.20</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>mcv</finalName>
</build>
</project>
2.applicationContext.xml
注释掉jdbc事务管理，添加hibernate事务管理。
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd"> <!-- context:设置注解扫描包注解
注: 如果springmvc-servlet中扫描注解没有排除@Service注解，这里要设置扫描除@Controller之外的其它所有注解
-->
<context:component-scan base-package="com.mvc">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
<!-- 自定义异常处理 -->
<context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice" />
</context:component-scan> <!-- 开启@Autowired注解扫描
注: 它等价于<bean class="org.springframework.beans.factory.annotation. AutowiredAnnotationBeanPostProcessor "/>
注: 配置了<context:component-scan />，默认包含对@Autowired的配置，因此下面这个配置就不需要了
-->
<context:annotation-config/> <!-- 注册数据源配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties" />
<!-- 注册数据源对象 这里用Spring内置数据源 -->
<bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName">
<value>${oracle11g.driverClass}</value>
</property>
<property name="url">
<value>${oracle11g.url}</value>
</property>
<property name="username">
<value>${oracle11g.username}</value>
</property>
<property name="password">
<value>${oracle11g.password}</value>
</property>
<property name="maxActive">
<value>${oracle11g.maxActive}</value>
</property>
<property name="maxIdle">
<value>${oracle11g.maxIdle}</value>
</property>
<property name="maxWait">
<value>${oracle11g.maxWait}</value>
</property>
<property name="defaultAutoCommit">
<value>${oracle11g.defaultAutoCommit}</value>
</property>
<property name="timeBetweenEvictionRunsMillis">
<value>${oracle11g.timeBetweenEvictionRunsMillis}</value>
</property>
<property name="minEvictableIdleTimeMillis">
<value>${oracle11g.minEvictableIdleTimeMillis}</value>
</property>
</bean>
<bean id="dataSource2" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName">
<value>${oracle11g-1.driverClass}</value>
</property>
<property name="url">
<value>${oracle11g-1.url}</value>
</property>
<property name="username">
<value>${oracle11g-1.username}</value>
</property>
<property name="password">
<value>${oracle11g-1.password}</value>
</property>
<property name="maxActive">
<value>${oracle11g-1.maxActive}</value>
</property>
<property name="maxIdle">
<value>${oracle11g-1.maxIdle}</value>
</property>
<property name="maxWait">
<value>${oracle11g-1.maxWait}</value>
</property>
<property name="defaultAutoCommit">
<value>${oracle11g-1.defaultAutoCommit}</value>
</property>
<property name="timeBetweenEvictionRunsMillis">
<value>${oracle11g-1.timeBetweenEvictionRunsMillis}</value>
</property>
<property name="minEvictableIdleTimeMillis">
<value>${oracle11g-1.minEvictableIdleTimeMillis}</value>
</property>
</bean>
<!-- 配置动态数据源 -->
<bean id="dynamicDataSource" class="com.mvc.dynamicDataSource.DynamicDataSource">
<property name="targetDataSources">
<map key-type="java.lang.String">
<!-- 指定lookupKey和与之对应的数据源 -->
<entry key="dataSource1" value-ref="dataSource1" />
<entry key="dataSource2" value-ref="dataSource2" />
</map>
</property>
<!-- 指定默认的数据源 -->
<property name="defaultTargetDataSource" ref="dataSource1" />
</bean> <!-- 配置事务管理对象-->
<!--
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource1" />
</bean>
--> <!-- Hibernate JPA vendor adapter -->
<bean id="hibernateJpaVendorAdapter"
class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform" value="org.hibernate.dialect.Oracle10gDialect"/>
</bean>
<!-- JPA entity manager factory -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource1"/>
<property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter"/>
<property name="packagesToScan" value="com.mvc.laboratory"/>
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>
<prop key="hibernate.show_sql">false</prop>
</props>
</property>
</bean>
<!-- JPA transaction manager -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean> <!-- 将所有具有@Transactional注解的Bean自动配置为声明式事务支持 -->
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/> <!-- MyBatis 数据源和sql- -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dynamicDataSource"/>
<property name="mapperLocations" value="classpath:/mappings/**/*.xml"/>
<property name="configLocation" value="classpath:/mybatis-config.xml"></property>
</bean>
<!-- MyBayis 扫描器配置-->
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<property name="basePackage" value="com.mvc.laboratory"/>
</bean> <!--接收json数据-->
<bean id="jsonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean> <!-- 配置事务自动代理 -->
<aop:aspectj-autoproxy proxy-target-class="true" />
</beans>
同样进行单元测试，动态数据源切换可照常使用。
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