1、問題

在使用SpringMVC3時，需要對response到頁面的資料進行編碼設定則需要自定義註解資料格式化類來對頁面傳過來的字串進行格式化。

編碼設定：

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" >  
        <property name="messageConverters">  
             <list>  
                 <bean class = "org.springframework.http.converter.StringHttpMessageConverter">  
                    <property name = "supportedMediaTypes">  
                         <list>  
                             <value>text/plain;charset=UTF-8</value>  
                         </list>  
                    </property>  
                 </bean>  
             </list>  
        </property>  
    </bean> 
 

Formatter設定:

<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">  
	  <property name="formatters">  
	      <list>  
	          <bean class="com.grgbanking.it.common.formatter.TimestampFormatAnnotationFormatterFactory"/>  
	      </list>  
	  </property>  
	</bean> 
	<mvc:annotation-driven conversion-service="conversionService"/>
 

當兩者按上面的設定好後，StringHttpMessageConverter不起作用了。

2、原因

<mvc:annotation-driven />的配置如下:

<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
		<property name="order" value="1" />
	</bean>
	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
		<property name="webBindingInitializer">
		  <bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
		   <property name="conversionService" ref="conversionService" />
		   <property name="validator" ref="validator" />
		  </bean>
		</property>
	</bean>
	<bean id="conversionService" class="org.springframework.samples.petclinic.util.PetclinicConversionServiceFactory" />
	<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" /> 
 

所以我們在上面配置的AnnotationMethodHandlerAdapter在<mvc:annotation-driven />後是不起作用的。<mvc:annotation-driven />包括了一個預設的AnnotationMethodHandlerAdapter功能。

3、解決

<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">  
	  <property name="formatters">  
	      <list>  
	          <bean class="com.grgbanking.it.common.formatter.TimestampFormatAnnotationFormatterFactory"/>  
	      </list>  
	  </property>  
	</bean> 
	
	<!-- 設定轉換器 -->
	<mvc:annotation-driven conversion-service="conversionService">
		<mvc:message-converters>  
        	 <bean class = "org.springframework.http.converter.StringHttpMessageConverter">  
                    <property name = "supportedMediaTypes">  
                         <list>  
                             <value>text/plain;charset=UTF-8</value>  
                         </list>  
                    </property>  
                 </bean>  
        </mvc:message-converters>
	</mvc:annotation-driven>