spring[i] 多数据源出错，好像是属性没有注入进去？大神帮忙看看，在线等。

spring多数据源mybatistargetDataSources

解决方案 »

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package com.sa.controller;import java.util.HashMap;
import java.util.Map;import javax.sql.DataSource;
import org.apache.log4j.Logger;
import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
public class DynamicDataSource extends AbstractRoutingDataSource {
    public static final Logger logger = Logger.getLogger(DynamicDataSource.class.toString());

    @Override
    protected Object determineCurrentLookupKey() {

     String name = DBContextHolder.getDBType();
        System.out.println("当前数据源 :" + name);
        return name;
    }

@Override
    public void setTargetDataSources(Map targetDataSources) {
     System.out.println("初始化"+targetDataSources+"数据源信息");
        super.setTargetDataSources(targetDataSources);
        //重点
       // super.afterPropertiesSet();
    }

}
[INFO] [2014-10-16 13:54:25] [Root WebApplicationContext: initialization started]
[INFO] [2014-10-16 13:54:25] [Refreshing Root WebApplicationContext: startup date [Thu Oct 16 13:54:25 CST 2014]; root of context hierarchy]
[INFO] [2014-10-16 13:54:25] [Loading XML bean definitions from class path resource [config/spring.xml]]
[INFO] [2014-10-16 13:54:26] [Loading properties file from class path resource [config/config.properties]]
[INFO] [2014-10-16 13:54:26] [Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@6e62be97: defining beans [org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0,dataSource1,dataSource2,dynamicDataSource,sqlSessionFactory,sqlSession,transactionManager]; root of factory hierarchy]
[ERROR] [2014-10-16 13:54:26] [testWhileIdle is true, validationQuery not set]
[INFO] [2014-10-16 13:54:26] [{dataSource-1} inited]
[ERROR] [2014-10-16 13:54:26] [testWhileIdle is true, validationQuery not set]
[INFO] [2014-10-16 13:54:26] [{dataSource-2} inited]
初始化{dataSource1={
CreateTime:"2014-10-16 13:54:26",
ActiveCount:0,
PoolingCount:0,
CreateCount:0,
DestroyCount:0,
CloseCount:0,
ConnectCount:0,
Connections:[
]
}, dataSource2={
CreateTime:"2014-10-16 13:54:26",
ActiveCount:0,
PoolingCount:0,
CreateCount:0,
DestroyCount:0,
CloseCount:0,
ConnectCount:0,
Connections:[
]
}}数据源信息
[INFO] [2014-10-16 13:54:26] [Root WebApplicationContext: initialization completed in 645 ms]
2014-10-16 13:54:26 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring FrameworkServlet 'springMvc'
[INFO] [2014-10-16 13:54:26] [FrameworkServlet 'springMvc': initialization started]
[INFO] [2014-10-16 13:54:26] [Refreshing WebApplicationContext for namespace 'springMvc-servlet': startup date [Thu Oct 16 13:54:26 CST 2014]; parent: Root WebApplicationContext]
[INFO] [2014-10-16 13:54:26] [Loading XML bean definitions from class path resource [config/spring-mvc.xml]]
[INFO] [2014-10-16 13:54:26] [Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@ca8e2b8: defining beans [userController,userService,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,baseDao,DBContextHolder,dynamicDataSource,org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler#0,org.springframework.web.servlet.handler.SimpleUrlHandlerMapping#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,mappingJacksonHttpMessageConverter,org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter#0,mvcContentNegotiationManager,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.view.InternalResourceViewResolver#0,multipartResolver,exceptionResolver,druid-stat-interceptor,org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator#0,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@6e62be97]
[INFO] [2014-10-16 13:54:27] [Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@ca8e2b8: defining beans [userController,userService,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,baseDao,DBContextHolder,dynamicDataSource,org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler#0,org.springframework.web.servlet.handler.SimpleUrlHandlerMapping#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,mappingJacksonHttpMessageConverter,org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter#0,mvcContentNegotiationManager,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.view.InternalResourceViewResolver#0,multipartResolver,exceptionResolver,druid-stat-interceptor,org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator#0,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@6e62be97]
2014-10-16 13:54:27 org.apache.catalina.core.ApplicationContext log
严重: StandardWrapper.Throwable
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dynamicDataSource' defined in file [E:\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\saweb_20141012\WEB-INF\classes\com\sa\controller\DynamicDataSource.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'targetDataSources' is required
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1512)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:296)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.spri
只重写determineCurrentLookupKey 这个方法，其它的都去掉
http://lyunabc.iteye.com/blog/1544423看下，对你的问题也许有帮助。
首先判断在单数据源的时候是否可以正常启动？在但数据源的时候可以正常启动的话，在此基础上改造多数据源；你现在这种写法主要适合于已经固定的数据源，也即是数据源是可预知的；就看你写的基本上是这么回事儿，出问题的跟踪调试；1：把你spring配置文件中，数据源配置中的 “init-method 是否是必须的呢?可否去掉？2：ContextHolder 这个类里需要指定下数据源，也就是你在配置文件中写的ref的数据源的名称public static final String DATA_SOURCE_A = "dataSource1";

    public static final String DATA_SOURCE_B = "dataSource2";  3：如何切换？如何切换是根据实际情况来定的，写个过滤器，根据登录或者请求不同路径下面的页面来判断调用哪一个数据库；ContextHolder.setDbType(ContextHolder.DATA_SOURCE_A);
ContextHolder.setDbType(ContextHolder.DATA_SOURCE_B);根据符合条件的来进行切换。
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