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。

a695004175 2014-10-16 11:34:08
spring 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。。。
先看配置。


<?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:tx="http://www.springframework.org/schema/tx" 

		xmlns:aop="http://www.springframework.org/schema/aop" 

		xsi:schemaLocation="

			http://www.springframework.org/schema/beans

			http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

			http://www.springframework.org/schema/context

			http://www.springframework.org/schema/context/spring-context-3.0.xsd

			http://www.springframework.org/schema/tx 

			http://www.springframework.org/schema/tx/spring-tx-3.2.xsd

			http://www.springframework.org/schema/aop 

			http://www.springframework.org/schema/aop/spring-aop-3.2.xsd

			">

	<!-- 引入属性文件 -->

	<context:property-placeholder location="classpath:config/config.properties" />



	<!-- 配置数据源 -->

	<bean name="dataSource1" class="com.alibaba.druid.pool.DruidDataSource"   

		init-method="init" destroy-method="close">

		<property name="url" value="${jdbc_url}" />

		<property name="username" value="${jdbc_username}" />

		<property name="password" value="${jdbc_password}" />

	</bean>

	

	<!-- 配置数据源 -->

	<bean name="dataSource2" class="com.alibaba.druid.pool.DruidDataSource"   

		init-method="init" destroy-method="close">

		<property name="url" value="${jdbc_url2}" />

		<property name="username" value="${jdbc_username2}" />

		<property name="password" value="${jdbc_password2}" />

	</bean>

	

	<bean id="dynamicDataSource" class="com.sa.controller.DynamicDataSource" >  

	    <!-- 通过key-value的形式来关联数据源 -->  

	    <property name="targetDataSources">  

	        <map key-type="java.lang.String">  

	            <entry value-ref="dataSource1" key="dataSource1"></entry>  

	            <entry value-ref="dataSource2" key="dataSource2"></entry>  

	        </map>  	

	    </property>  

	    <property name="defaultTargetDataSource" ref="dataSource1" >  

	    </property>  

	</bean> 



	<!-- myBatis文件 -->

	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" abstract="true" lazy-init="true">

		<property name="dataSource" ref="dynamicDataSource" />

		<property name="configLocation"  value="classpath:config/mybatis-plugin.xml" />  

		<property name="mapperLocations" value="classpath:mapper/*.xml" />

	</bean>

	

	<!-- SqlSessionTemplate -->

	<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate" scope="prototype"> 

	  <constructor-arg index="0" ref="dynamicDataSource" />  

	  <constructor-arg index="1" value="BATCH" />	 <!--  如果想要进行批量操作可加入这个属性 -->

	</bean>

	

	<!--<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> -->

	<!-- 	<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> -->

	<!--</bean> -->



	<!-- 配置事务管理器 -->

	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

		<property name="dataSource" ref="dynamicDataSource" />

	</bean>

</beans>

继承 import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource 的类


package com.sa.controller;



import java.util.Map;





import org.apache.log4j.Logger;

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

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





public class DynamicDataSource extends AbstractRoutingDataSource {  

    public static final Logger logger = Logger.getLogger(DynamicDataSource.class.toString());

    

    @Override

    protected Object determineCurrentLookupKey() {

    	

    	String name = ContextHolder.getDbType();

        System.out.println("当前数据源 :" + name);

        return name;

    }



    @Override  

    public void setTargetDataSources(Map targetDataSources) {  

        super.setTargetDataSources(targetDataSources);  

        //重点  

        super.afterPropertiesSet();  

    }  

    

    @Override  

    public void setDataSourceLookup(DataSourceLookup dataSourceLookup) {  

        super.setDataSourceLookup(dataSourceLookup);  

    }  

  

    @Override  

    public void setDefaultTargetDataSource(Object defaultTargetDataSource) {  

        super.setDefaultTargetDataSource(defaultTargetDataSource);  

    }  

}

线程类



package com.sa.controller;



public class ContextHolder {  

	  

    private static final ThreadLocal<Object> holder = new ThreadLocal<Object>();



    public static void setDbType(String dbType) {

        holder.set(dbType);

    }



    public static String getDbType() {

        return (String) holder.get();

    }



    public static void clearDbType() {

        holder.remove();

    }

}

启动时异常错误信息


[INFO] [2014-10-16 11:26:44] [Root WebApplicationContext: initialization started]

[INFO] [2014-10-16 11:26:44] [Refreshing Root WebApplicationContext: startup date [Thu Oct 16 11:26:44 CST 2014]; root of context hierarchy]

[INFO] [2014-10-16 11:26:44] [Loading XML bean definitions from class path resource [config/spring.xml]]

[INFO] [2014-10-16 11:26:45] [Loading properties file from class path resource [config/config.properties]]

[INFO] [2014-10-16 11:26:45] [Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1b1a772d: defining beans [org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0,dataSource1,dataSource2,dynamicDataSource,sqlSessionFactory,sqlSession,transactionManager]; root of factory hierarchy]

[ERROR] [2014-10-16 11:26:45] [testWhileIdle is true, validationQuery not set]

[INFO] [2014-10-16 11:26:45] [{dataSource-1} inited]

[ERROR] [2014-10-16 11:26:45] [testWhileIdle is true, validationQuery not set]

[INFO] [2014-10-16 11:26:45] [{dataSource-2} inited]

[INFO] [2014-10-16 11:26:45] [Root WebApplicationContext: initialization completed in 1490 ms]

2014-10-16 11:26:45 org.apache.catalina.core.ApplicationContext log

信息: Initializing Spring FrameworkServlet 'springMvc'

[INFO] [2014-10-16 11:26:45] [FrameworkServlet 'springMvc': initialization started]

[INFO] [2014-10-16 11:26:45] [Refreshing WebApplicationContext for namespace 'springMvc-servlet': startup date [Thu Oct 16 11:26:45 CST 2014]; parent: Root WebApplicationContext]

[INFO] [2014-10-16 11:26:45] [Loading XML bean definitions from class path resource [config/spring-mvc.xml]]

ERROR] [2014-10-16 11:26:47] [Context initialization failed]

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)


主要 就是[Context initialization failed]
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 这个错。。。。
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getdate 2014-10-22
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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。 --------------
getdate 2014-10-16
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http://lyunabc.iteye.com/blog/1544423 看下，对你的问题也许有帮助。
whos2002110 2014-10-16
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只重写determineCurrentLookupKey 这个方法，其它的都去掉
a695004175 2014-10-16
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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
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