将spring mvc 配置文件中

<beanclass="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<propertyname="messageConverters">
<list>
<beanclass="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter"/>
</list>
</property>
</bean>

改为

<beanclass="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<propertyname="messageConverters">
<list>
<beanclass="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
<propertyname="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
</list>
</property>
</bean>