1.Spring要支持json需要添加這樣的配置(還有需要相關json jar包)
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref local="mappingJacksonHttpMessageConverter" />
</list>
</property>
</bean>