fastjson文档： https://github.com/alibaba/fastjson/wiki jar: fastjson-1.2.32，spring 4.2+
springmvc配置
<bean id = "fastJsonConfig" class="com.alibaba.fastjson.support.config.FastJsonConfig">
<property name="serializerFeatures">
<list>
<value>QuoteFieldNames
</value>
<value>WriteMapNullValue
</value>
<value>WriteNullNumberAsZero
</value>
<value>WriteNullListAsEmpty
</value>
<value>WriteNullStringAsEmpty
</value>
<value>WriteNullBooleanAsFalse
</value>
</list>
</property>
<property name="dateFormat" value="yyyy-MM-dd HH:mm:ss"></property>
</bean>
<mvc:annotation-driven>
<mvc:message-converters register-defaults="true">
<bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter4">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8
</value>
<value>application/json;charset=UTF-8
</value>
</list>
</property>
<property name="fastJsonConfig" ref="fastJsonConfig"/>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
