SpringMVC返回中文乱码

尝试了很多，有在controller的返回方法上面加：@RequestMapping(value = "allproduct",produces={"application/json;","text/html;charset=UTF-8;"})

也有：

<mvc:annotation-driven >
    <!-- 消息转换器 -->
    <mvc:message-converters register-defaults="true">
      <bean class="org.springframework.http.converter.StringHttpMessageConverter">
        <property name="supportedMediaTypes" value="text/html;charset=UTF-8"/>
      </bean>
    </mvc:message-converters>
  </mvc:annotation-driven>

以上都不好用

最后在springmvc的配置文件注解驱动：

<mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <constructor-arg ref="utf8Charset" />
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>
    <bean id="utf8Charset" class="java.nio.charset.Charset" factory-method="forName">
        <constructor-arg value="UTF-8" />
    </bean>

完美解决