我有这个工厂类,我想通过spring连接地图的运行时配置。该映射包含枚举对象和标准pojo。
public class GenericEntityFactoryImpl implements GenericEntityFactory
{
private Map<IndexType,IEntity> indexEntityMap = null;
@Override
public IEntity getIndexEntity(IndexType index) {
return indexEntityMap.get(index);
}
public Map<IndexType, IEntity> getIndexEntityMap() {
return indexEntityMap;
}
public void setIndexEntityMap(Map<IndexType, IEntity> indexEntityMap) {
this.indexEntityMap = indexEntityMap;
}
}
我的spring util有问题:地图布线,因为在确定键值时我不确定如何正确引用特定的枚举类型。地图值的bean ref很简单。弹簧图布线的所有例子似乎都假设键是一个字符串!
<!-- the value object bean -->
<bean id="cell" class="com.xx.xx.common.index.entity.CellEntity"/>
<bean id="genericEntityFactory" class="com.xx.xx.common.index.GenericEntityFactoryImpl">
<util:map
id="indexEntityMap"
map-class="java.util.HashMap"
key-type="com.xx.xx.common.index.IndexType"
value-type="com.xx.xx.common.index.GenericEntityFactoryImpl">
<entry key="CELL">
<ref bean="cell"/>
</entry>
</util:map>
</bean>
修改
所以我重构了映射
<bean id="genericEntityFactory" class="com.xx.xx.common.index.GenericEntityFactoryImpl" >
<property name="indexEntityMap">
<map >
<entry key="com.xx.xx.common.index.CELL"><ref bean="cell"/></entry>
</map>
</property>
</bean>
但假设春天会聪明失败......
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'genericEntityFactory' defined in class path resource [com/xx/xx/common/index/index-application-context.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.util.LinkedHashMap] to required type [java.util.Map] for property 'indexEntityMap'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [com.xx.xx.common.index.IndexType] for property 'indexEntityMap[com.xx.xx.common.index.CELL]': no matching editors or conversion strategy found
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:480)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:84)
at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:42)
at org.springframework.test.context.TestContext.loadApplicationContext(TestContext.java:173)
at org.springframework.test.context.TestContext.getApplicationContext(TestContext.java:197)
... 17 more
Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.util.LinkedHashMap] to required type [java.util.Map] for property 'indexEntityMap'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [com.xx.xx.common.index.IndexType] for property 'indexEntityMap[com.xx.xx.common.index.CELL]': no matching editors or conversion strategy found
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:391)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1249)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1010)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:472)
... 32 more
Caused by: java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [com.xx.xx.common.index.IndexType] for property 'indexEntityMap[com.xx.xx.common.index.CELL]': no matching editors or conversion strategy found
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:219)
at org.springframework.beans.TypeConverterDelegate.convertToTypedMap(TypeConverterDelegate.java:508)
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:194)
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:138)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:386)
... 36 more
答案 0 :(得分:12)
通过定义我计划作为单独的bean添加到地图的每个枚举,我找到了一种解决方法 - 感谢creating-spring-bean-from-java-5-enum
<bean id="CELL" class="com.xx.xx.common.index.IndexType" factory-method="valueOf">
<constructor-arg>
<value>CELL</value>
</constructor-arg>
</bean>
<bean id="APN" class="com.xx.xx.common.index.IndexType" factory-method="valueOf">
<constructor-arg>
<value>APN</value>
</constructor-arg>
</bean>
定义了枚举后我可以在地图中对它们进行键控 -
<bean id="genericEntityFactory" class="com.xx.xx.common.index.GenericEntityFactoryImpl" >
<property name="indexEntityMap">
<map>
<entry key-ref="CELL"><ref bean="cell"/></entry>
<entry key-ref="APN"><ref bean="apn"/></entry>
</map>
</property>
</bean>
答案 1 :(得分:10)
这是另一种更短的格式:
<bean id="versionService" class="my.service.VersionService"
p:animalDAOMap-ref="animalDAOMap"/>
<util:map id="p:animalDAOMap">
<entry key="chicken" value-ref="chickenDAO"/>
<entry key="monkey" value-ref="monkeyDAO"/>
<entry key="pig" value-ref="pigDAO"/>
</util:map>
确保包含命名空间
xmlns:util="http://www.springframework.org/schema/util"
架构
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.0.xsd
顺便说一下,我在这里使用Spring 3.0+
答案 2 :(得分:0)
和你一样犯了同样的错误。我能够通过将我的枚举移动到独立文件并将我的枚举公开来避免它。
所以我的
public enum EventType { INFO, ERROR }
放在
中EventType.java
如果重要的话,我只有一个包。 我正在以这种方式注入依赖(通过构造函数arg通过xml):
spring.xml:
<constructor-arg>
<map>
<entry key="INFO" value-ref="consoleEventLogger"></entry>
<entry key="ERROR" value-ref="combinedEventLogger"></entry>
</map>
</constructor-arg>
这对我来说是弹簧核心4.3.6
我相信有一个解释,这取决于反射和内部Spring逻辑。但我没有太多的Java经验,我无法提供。
答案 3 :(得分:-1)
我认为这就是你所需要的。注意我认为您不需要指定键类型和值类型属性。 Spring应该能够解决这个问题。
<bean id="genericEntityFactory" class="com.xx.xx.common.index.GenericEntityFactoryImpl">
<property name="indexEntityMap" ref="indexEntityMapBean"/>
</bean>
<util:map id="indexEntityMapBean"
map-class="java.util.HashMap"
key-type="com.xx.xx.common.index.IndexType"
value-type="com.xx.xx.common.index.GenericEntityFactoryImpl">
<entry key="com.xx.xx.common.index.IndexType.CELL">
<ref bean="cell"/>
</entry>
</util:map>
使用<util:map
代替清洁的自治<map>
(参见3.3.3.3部分)的唯一原因是,如果您想将相同的地图连接到多个地方,或者您想要使用一个不同的底层地图实现,例如ConcurrentHashMap。