獲取：java.lang.IllegalStateException：無法將[java.lang.String]類型的值轉換爲所需的類型[javax.sql.DataSource]

Question

我使用Spring 3.2.13 jars和ibatis 2.3.4.726版本進行設置一個DataSource如下

我得到下面的異常 Caused by: java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [javax.sql.DataSource] for property 'dataSource': no matching editors or conversion strategy found

我的XML Spring的配置文件是如下：

<bean id="commonDataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> 
    <property name="jndiName" value="jdbc/ds_GOLD" /> 
    <property name="defaultObject" value="jdbc/ds_SILVERR" /> 
</bean> 

<bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean"> 
    <property name="configLocation"> 
     <value> 
      classpath:com/dav/dao/config/sqlMapConfig.xml 
     </value> 
    </property> 
    <property name="dataSource"> 
     <ref bean="commonDataSource" /> 
    </property> 
    <property name="transactionConfigClass"> 
     <value>com.ibatis.sqlmap.engine.transaction.external.ExternalTransactionConfig 
     </value> 
    </property> 
    <property name="transactionConfigProperties"> 
     <props> 
      <prop key="DefaultAutoCommit">false</prop> 
      <prop key="SetAutoCommitAllowed">false</prop> 
     </props> 
    </property> 
</bean> 

的配置似乎對我好，但得到的異常 Ø只有在應用程序服務器中未配置「jdbc/ds_GOLD」。在這種情況下，它應該選擇defaultObject JNDI。如果在應用程序服務器中配置了「jdbc/ds_GOLD」，我在日誌中看不到任何錯誤。但故障轉移情況下，它不起作用。

[5/1/16 3:32:51:329 EDT] 00000098 webapp  I com.ibm.ws.webcontainer.webapp.WebApp log SRVE0296E: [glow#glow.war][/glow][Servlet.LOG]:.StrutsServlet: null:.org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'gcdSqlMapClient' defined in ServletContext resource [/WEB-INF/config/common-dao.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.lang.String' to required type 'javax.sql.DataSource' for property 'dataSource'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [javax.sql.DataSource] for property 'dataSource': no matching editors or conversion strategy found 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:529) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:191) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:618) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:934) 
    . 
    . 
    . 
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1862) 
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.lang.String' to required type 'javax.sql.DataSource' for property 'dataSource'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [javax.sql.DataSource] for property 'dataSource': no matching editors or conversion strategy found 
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:464) 
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:495) 
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:489) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1465) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1424) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1160) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) 
    ... 114 more 
Caused by: java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [javax.sql.DataSource] for property 'dataSource': no matching editors or conversion strategy found 
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:267) 
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:449) 
    ... 120 more 
`` 

Answer 1

忘記保留defaultObject作爲對dataSource的屬性引用。我錯誤地將它配置爲屬性值。