Spring无法注册转换器

Question

I'm following the example here . My applicationContext has the following:

<bean id="conversionService"
      class="org.springframework.context.support.ConversionServiceFactoryBean">
    <property name="converters">
        <set>
            <bean class="org.mypackage.MyFilterConverter"/>
        </set>
    </property>
</bean>

My converter looks like this:

public class MyFilterConverter implements Converter<String, HashMap<String, List<MyClass>>> { ...

My problem: when I

@Autowired
private ConversionService conversionService;

and try to use it, the conversionService has only the default ones, not MyFilterConverter.

I followed the stack trace down to

GenericConversionService.addConverter(GenericConverter converter)

When I come back from this call, my converter is not added.

Any ideas?

thanks

-- llappall

Answer 1

If you are using <mvc:annotation-driven/> to configure Spring MVC then it creates a conversionService internally and may be overriding your conversionService, the way to override is to replace <mvc:annotation-driven/> with this(if you are using Spring 3.1):

<bean name="handlerAdapter" class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
    <property name="webBindingInitializer">
        <bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
            <property name="conversionService" ref="conversionService"></property>
            <property name="validator">
                <bean class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"/>
            </property>
        </bean>
    </property>
    <property name="messageConverters">
        <list>
            <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"></bean>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter"></bean>
            <bean class="org.springframework.http.converter.ResourceHttpMessageConverter"></bean>
            <bean class="org.springframework.http.converter.xml.SourceHttpMessageConverter"></bean>
            <bean class="org.springframework.http.converter.xml.XmlAwareFormHttpMessageConverter"></bean>
            <bean class="org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter"></bean>
            <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>
        </list>
    </property>
</bean>

This should ensure that only 1 conversionService(yours) will be present.