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大家好，春天 - 框架：同時拉動記錄
我同時在spring.xml文件中使用地圖收到以下異常給予例外。 我「spring.xml」文件包含以下信息，請告訴我，你需要實現類也：
<bean id="triangleMap" class="practice.spring.model.TriangleSet">
<property name="points">
<map>
<entry key="PointA" value-ref="point1" />
<entry key="PointB" value-ref="point2" />
<entry key="PointC" value-ref="point3" />
</map>
</property>
</bean>
<bean name="point1" class="practice.spring.model.Point">
<property name="x" value="0" />
<property name="y" value="0" />
</bean>
<bean id="point2" class="practice.spring.model.Point">
<property name="x" value="0" />
<property name="y" value="10" />
</bean>
<bean id="point3" class="practice.spring.model.Point">
<property name="x" value="0" />
<property name="y" value="-10" />
</bean>
這是給以下異常：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'triangleMap' defined in class path resource [spring.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.util.LinkedHashMap' to required type 'java.util.Set' for property 'points'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.util.LinkedHashMap] to required type [practice.spring.model.Point] for property 'points[0]': no matching editors or conversion strategy found
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at practice.spring.service.DrawingApp.main(DrawingApp.java:14)
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.util.LinkedHashMap' to required type 'java.util.Set' for property 'points'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.util.LinkedHashMap] to required type [practice.spring.model.Point] for property 'points[0]': no matching editors or conversion strategy found
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:462)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:499)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:493)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1371)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1330)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
... 11 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [java.util.LinkedHashMap] to required type [practice.spring.model.Point] for property 'points[0]': no matching editors or conversion strategy found
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:231)
at org.springframework.beans.TypeConverterDelegate.convertToTypedCollection(TypeConverterDelegate.java:520)
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:173)
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:447)
... 17 more