SpringBoot 整合 fastjson

Springboot处理返回的参数为null、或者不返回

一、通过继承WebMvcConfigurerAdapter，重写configureMessageConverters方法实现

 @Configuration public class fastJsonConfig extends WebMvcConfigurerAdapter { @Autowired private LogCostInterceptor logCostInterceptor; /** * 使用阿里 fastjson 作为JSON MessageConverter * @param converters */ @Override public void configureMessageConverters(List<HttpMessageConverter<?>> converters) { FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter(); FastJsonConfig config = new FastJsonConfig(); config.setSerializerFeatures( //json格式输出 SerializerFeature.PrettyFormat, // 保留map为空的字段 SerializerFeature.WriteMapNullValue, // 将String类型的null转成""形式 SerializerFeature.WriteNullStringAsEmpty, // 将Number类型的null转成0，也可以理解为Integer SerializerFeature.WriteNullNumberAsZero, // 将List类型的null转成[],而不是“”” SerializerFeature.WriteNullListAsEmpty, // Boolean类型的null转成false SerializerFeature.WriteNullBooleanAsFalse, // 处理可能循环引用的问题 SerializerFeature.DisableCircularReferenceDetect); converter.setFastJsonConfig(config); converter.setDefaultCharset(Charset.forName("UTF-8")); List<MediaType> mediaTypeList = new ArrayList<>(); mediaTypeList.add(MediaType.APPLICATION_JSON); converter.setSupportedMediaTypes(mediaTypeList); converters.add(converter); } }

二、在Springboot启动类中

 @Bean public HttpMessageConverters fastJsonConverters() { FastJsonHttpMessageConverter4 fastConverter = new FastJsonHttpMessageConverter4(); FastJsonConfig fastJsonConfig = new FastJsonConfig(); fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat, SerializerFeature.IgnoreNonFieldGetter, SerializerFeature.WriteMapNullValue, SerializerFeature.WriteNullStringAsEmpty); fastConverter.setFastJsonConfig(fastJsonConfig); List supportedMediaTypes = new ArrayList(); supportedMediaTypes.add(new MediaType("text", "json", Charset.forName("utf8"))); supportedMediaTypes.add(new MediaType("application", "json", Charset.forName("utf8"))); fastConverter.setSupportedMediaTypes(supportedMediaTypes); HttpMessageConverter<?> converter = fastConverter; return new HttpMessageConverters(converter); }

三、 在实体类中，添加： @JSONField注解，如果为false，接口中不会返回这个字段。

 @JSONField(serialize = false) private String password;

源码获取：
github
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