最近需要配置多数据源的问题,根据资料我进行了以下配置,但是运行时总是无法切换数据源
一、项目目录结构
二、注解类
@Target({ElementType.METHOD,ElementType.TYPE}) @Retention(RetentionPolicy.RUNTIME) @Documented @Inherited public @interface DataSourceInf { String value() default DataSource.DATASOURCE_DEFAULT; }
三、数据源类
public class DataSource { /** * 读写数据库 */ public static final String DATASOURCE_DEFAULT = "dataSource"; /** * 只读数据库 */ public static final String DATASOURCE_READ = "dataSource_read"; /** * 只读数据库 */ public static final String DATASOURCE_WRITE = "dataSource_write"; }
四、AOP拦截类
@Order(0) @Aspect @Component public class DynamicDataSourceAspect { @Around("within(com.thinkgem.jeesite.modules.wql.service..*) && @annotation(db)") public Object doBasicProfiling(ProceedingJoinPoint pjp, DataSourceInf db) throws Throwable { DynamicDataSource.setDataSource(db.value()); Object object = null; try { object = pjp.proceed(); } catch (Exception e) { e.printStackTrace(); throw e; } // 继续执行该方法 DynamicDataSource.setDefault(); return object; } }
五、
DynamicDataSource.java
public class DynamicDataSource extends AbstractRoutingDataSource { private static final ThreadLocal<String> holder = new ThreadLocal<String>(); public static void setDataSource(String dbType) { holder.set(dbType); } public static void setDefault() { holder.set("dataSource"); } @Override protected Object determineCurrentLookupKey() { return holder.get(); } }
六、配置数据源,jeesit.properties
jdbc.type=mysql jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/jeesite?useUnicode=true&characterEncoding=utf-8 jdbc.username=root jdbc.password=admin #mysql database setting jdbc2.driver=com.mysql.jdbc.Driver jdbc2.url=jdbc:mysql://197.2.127.11:3306/test?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true jdbc2.username=root jdbc2.password=admin #mysql database setting jdbc3.driver=com.mysql.jdbc.Driver jdbc3.url=jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=utf-8 jdbc3.username=root jdbc3.password=admin
七、配置文件,spring-context.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" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xmlns:task="http://www.springframework.org/schema/task" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.1.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd" default-lazy-init="true"> <description>Spring Configuration</description> <!-- 加载配置属性文件 --> <context:property-placeholder ignore-unresolvable="true" location="classpath:jeesite.properties" /> <!-- 加载应用属性实例,可通过 @Value("#{APP_PROP['jdbc.driver']}") String jdbcDriver 方式引用 --> <util:properties id="APP_PROP" location="classpath:jeesite.properties" local-override="true"/> <!-- 使用Annotation自动注册Bean,解决事物失效问题:在主容器中不扫描@Controller注解,在SpringMvc中只扫描@Controller注解。 --> <context:component-scan base-package="com.thinkgem.jeesite"><!-- base-package 如果多个,用“,”分隔 --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- MyBatis begin --> <bean id="dynamicDataSource" class="com.thinkgem.jeesite.common.db.DynamicDataSource"> <property name="defaultTargetDataSource" ref="dataSource"></property> <property name="targetDataSources"> <map key-type="java.lang.String"> <entry value-ref="dataSource" key="dataSource"></entry> <entry value-ref="dataSource_read" key="dataSource_read"></entry> <entry value-ref="dataSource_write" key="dataSource_write"></entry> </map> </property> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dynamicDataSource"/> <property name="typeAliasesPackage" value="com.thinkgem.jeesite"/> <property name="typeAliasesSuperType" value="com.thinkgem.jeesite.common.persistence.BaseEntity"/> <property name="mapperLocations" value="classpath:/mappings/**/*.xml"/> <property name="configLocation" value="classpath:/mybatis-config.xml"></property> </bean> <!-- 扫描basePackage下所有以@MyBatisDao注解的接口 --> <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> <property name="basePackage" value="com.thinkgem.jeesite"/> <property name="annotationClass" value="com.thinkgem.jeesite.common.persistence.annotation.MyBatisDao"/> </bean> <!-- 定义事务 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dynamicDataSource" /> </bean> <!-- 配置 Annotation 驱动,扫描@Transactional注解的类定义事务 --> <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/> <!-- MyBatis end --> <!-- 配置 JSR303 Bean Validator 定义 --> <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" /> <!-- 缓存配置 --> <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"> <property name="configLocation" value="classpath:${ehcache.configFile}" /> </bean> <!-- 计划任务配置,用 @Service @Lazy(false)标注类,用@Scheduled(cron = "0 0 2 * * ?")标注方法 --> <task:executor id="executor" pool-size="10"/> <task:scheduler id="scheduler" pool-size="10"/> <task:annotation-driven scheduler="scheduler" executor="executor" proxy-target-class="true"/> <!-- 数据源配置, 使用 BoneCP 数据库连接池 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <!-- 数据源驱动类可不写,Druid默认会自动根据URL识别DriverClass --> <property name="driverClassName" value="${jdbc.driver}" /> <!-- 基本属性 url、user、password --> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <!-- 配置初始化大小、最小、最大 --> <property name="initialSize" value="${jdbc.pool.init}" /> <property name="minIdle" value="${jdbc.pool.minIdle}" /> <property name="maxActive" value="${jdbc.pool.maxActive}" /> <!-- 配置获取连接等待超时的时间 --> <property name="maxWait" value="60000" /> <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="300000" /> <property name="validationQuery" value="${jdbc.testSql}" /> <property name="testWhileIdle" value="true" /> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <!-- 打开PSCache,并且指定每个连接上PSCache的大小(Oracle使用) <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="20" /> --> <!-- 配置监控统计拦截的filters --> <property name="filters" value="stat" /> </bean> <!-- 数据源配置, 使用 BoneCP 数据库连接池 --> <bean id="dataSource_read" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <!-- 数据源驱动类可不写,Druid默认会自动根据URL识别DriverClass --> <property name="driverClassName" value="${jdbc2.driver}" /> <!-- 基本属性 url、user、password --> <property name="url" value="${jdbc2.url}" /> <property name="username" value="${jdbc2.username}" /> <property name="password" value="${jdbc2.password}" /> <!-- 配置初始化大小、最小、最大 --> <property name="initialSize" value="${jdbc.pool.init}" /> <property name="minIdle" value="${jdbc.pool.minIdle}" /> <property name="maxActive" value="${jdbc.pool.maxActive}" /> <!-- 配置获取连接等待超时的时间 --> <property name="maxWait" value="60000" /> <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="300000" /> <property name="validationQuery" value="${jdbc.testSql}" /> <property name="testWhileIdle" value="true" /> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <!-- 打开PSCache,并且指定每个连接上PSCache的大小(Oracle使用) <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="20" /> --> <!-- 配置监控统计拦截的filters --> <property name="filters" value="stat" /> </bean> <!-- 数据源配置, 使用 BoneCP 数据库连接池 --> <bean id="dataSource_write" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <!-- 数据源驱动类可不写,Druid默认会自动根据URL识别DriverClass --> <property name="driverClassName" value="${jdbc3.driver}" /> <!-- 基本属性 url、user、password --> <property name="url" value="${jdbc3.url}" /> <property name="username" value="${jdbc3.username}" /> <property name="password" value="${jdbc3.password}" /> <!-- 配置初始化大小、最小、最大 --> <property name="initialSize" value="${jdbc.pool.init}" /> <property name="minIdle" value="${jdbc.pool.minIdle}" /> <property name="maxActive" value="${jdbc.pool.maxActive}" /> <!-- 配置获取连接等待超时的时间 --> <property name="maxWait" value="60000" /> <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="300000" /> <property name="validationQuery" value="${jdbc.testSql}" /> <property name="testWhileIdle" value="true" /> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <!-- 打开PSCache,并且指定每个连接上PSCache的大小(Oracle使用) <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="20" /> --> <!-- 配置监控统计拦截的filters --> <property name="filters" value="stat" /> </bean> <!-- 配置AOP --> <aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy> <!-- 数据源配置, 使用应用服务器的数据库连接池 <jee:jndi-lookup id="dataSource" jndi-name="java:comp/env/jdbc/jeesite" />--> <!-- 数据源配置, 不使用连接池 <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean>--> </beans>
八,测试类 TUserService.java
@Service @Transactional(readOnly = true) public class TUserService extends CrudService<TUserDao, TUser> { @Autowired TUserDao tUserDao; public TUser get(String id) { return super.get(id); } public List<TUser> findList(TUser tUser) { return super.findList(tUser); } @DataSourceInf(DataSource.DATASOURCE_READ) public List<TUser> getAllList() { //DynamicDataSource.setDataSource(DataSource.DATASOURCE_READ); List list = tUserDao.getAllList(); System.out.println("<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>"+list.toString()); return list; } public Page<TUser> findPage(Page<TUser> page, TUser tUser) { return super.findPage(page, tUser); } @Transactional(readOnly = false) public void save(TUser tUser) { super.save(tUser); } @Transactional(readOnly = false) public void delete(TUser tUser) { super.delete(tUser); } }
运行结果:
错误信息:
### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'jeesite.t_user' doesn't exist
### The error may exist in file [E:\soft\jeesite-master\target\jeesite\WEB-INF\classes\mappings\modules\wql\TUserDao.xml]
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT a.id AS "id", a.user_name AS "userName", a.password AS "password", a.role_id AS "roleId", a.true_name AS "trueName", a.create_time AS "createTime", a.modify_time AS "modifyTime" FROM t_user a where 1=1
### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'jeesite.t_user' doesn't exist
; bad SQL grammar []; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'jeesite.t_user' doesn't exist
有以下两个问题:
问题1、上面在service层不管是以注解的形式,还是以(
DynamicDataSource.setDataSource(DataSource.DATASOURCE_READ)
)的形式,都报上面的错误,找不到表,这应该就是没有正确的切换数据源,不知道问题具体出在哪里?经过测试,如果控制在controller中(以
DynamicDataSource.setDataSource(DataSource.DATASOURCE_READ)
)的形式进行切换是可以的。
问题2、我又换了一种方式,如果在DAO中进行注解,则根本无法进入AOP拦截中,配置如下
(1)、DAO类 TUserDao.java
@MyBatisDao @DataSourceInf(DataSource.DATASOURCE_READ) public interface TUserDao extends CrudDao<TUser> { @DataSourceInf(DataSource.DATASOURCE_READ) public List<TUser> getAllList(); }
(2)、AOP拦截类 DynamicDataSourceAspect.java
该类只修改了需要拦截的文件路径
@Around("within(com.thinkgem.jeesite.modules.wql.dao..*) && @annotation(db)")
修改完毕后,运行后则根本没有进入AOP拦截类,是不是因为DAO是一个接口?
求大神解答,谢谢。