SpringMVC设置缺省的返回数据格式

<dependency>
			<groupId>com.fasterxml.jackson.dataformat</groupId>
			<artifactId>jackson-dataformat-xml</artifactId>
			<version>2.6.0</version>
		</dependency>

<mvc:annotation-driven content-negotiation-manager="contentNegotiationManager"/>
	
	<bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
		<property name="mediaTypes" > <!-- 根据Request Accept头返回不同的格式 -->
	        <value>
	            json=application/json
	            xml=application/xml
	        </value>
	    </property>
    	<property name="defaultContentType" value="application/json" /> <!-- 缺省返回json格式 -->
	</bean>

<mvc:annotation-driven />