fastjson 转换了两次 如何解决呢
登录成功返回的是string类型的json {"code":0,"count":0,"msg":"login.success"}
二不是 json
spring mvc 集成 fastjson
之前 nutzboot 也遇到类似的问题 请教 如何解决呢
求大神解答

    <!-- 启用默认配置 -->
    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <bean class="org.springframework.http.converter.StringHttpMessageConverter" />
            <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html;charset=UTF-8</value>
                        <value>application/json;charset=UTF-8</value>
                        <value>*/*;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>


@Configuration
public class FastJSONMessageConverter extends ConfigurableWebBindingInitializer {

    @Bean
    public HandlerAdapter handlerAdapter(WebBindingInitializer webBindingInitializer) {
        RequestMappingHandlerAdapter requestMappingHandlerAdapter = new RequestMappingHandlerAdapter();
        //参数及返回值处理

        List<HttpMessageConverter<?>> converters = new ArrayList<HttpMessageConverter<?>>();
        //注入FastJSON
        FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();

//        log.info("converters:" + converters.toString());
        List<MediaType> supportMediaTypeList = new ArrayList<>();
        supportMediaTypeList.add(MediaType.TEXT_HTML);
        supportMediaTypeList.add(MediaType.APPLICATION_JSON_UTF8);
        supportMediaTypeList.add(MediaType.IMAGE_GIF);
        supportMediaTypeList.add(MediaType.IMAGE_JPEG);
        supportMediaTypeList.add(MediaType.IMAGE_PNG);

        FastJsonConfig config = new FastJsonConfig();

        SerializerFeature[] serializerFeatures = new SerializerFeature[]{
                //    输出key是包含双引号
//                SerializerFeature.QuoteFieldNames,
                //    是否输出为null的字段,若为null 则显示该字段
                SerializerFeature.WriteMapNullValue,
                //    数值字段如果为null，则输出为0
                SerializerFeature.WriteNullNumberAsZero,
                //     List字段如果为null,输出为[],而非null
                SerializerFeature.WriteNullListAsEmpty,
                //    字符类型字段如果为null,输出为"",而非null
                SerializerFeature.WriteNullStringAsEmpty,
                //    Boolean字段如果为null,输出为false,而非null
                SerializerFeature.WriteNullBooleanAsFalse,
                //    Date的日期转换器
                SerializerFeature.WriteDateUseDateFormat,
                //    循环引用
//                SerializerFeature.DisableCircularReferenceDetect,
        };

        config.setDateFormat("yyyy-MM-dd HH:mm:ss");
        config.setSerializerFeatures(serializerFeatures);
        converter.setFastJsonConfig(config);
        converter.setSupportedMediaTypes(supportMediaTypeList);
        converter.setDefaultCharset(Charset.forName("UTF-8"));
        converters.add(converter);
        //参数及返回值处理
        requestMappingHandlerAdapter.setMessageConverters(converters);
        //参数校验
        requestMappingHandlerAdapter.setWebBindingInitializer(webBindingInitializer);
        return requestMappingHandlerAdapter;

    }
}