1、在peroperties文件中配置以下代码即可
<!-- 处理请求返回json字符串的中文乱码问题 -->
<mvc:annotation-driven>
<mvc:message-converters register-defaults="true">
<!-- StringHttpMessageConverter编码为UTF-8,防止乱码 -->
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<constructor-arg value="UTF-8" />
</bean>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="objectMapper">
<bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
<property name="failOnEmptyBeans" value="false"/>
</bean>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>