在springboot中添加jsonConverter

spring默认支持的是jackson2的json解析器.如今大部分人都习惯了fastJson的解析器.如今简单的说下如何配置json解析器

jackson2

配置以下:

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {

 //JackSon 配置
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
        builder.serializationInclusion(JsonInclude.Include.NON_NULL);
        ObjectMapper objectMapper = builder.build();
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        objectMapper.registerModule(simpleModule);
        objectMapper.configure(MapperFeature.PROPAGATE_TRANSIENT_MARKER, true);// 忽略 transient 修饰的属性
        converters.add(new MappingJackson2HttpMessageConverter(objectMapper));
        super.configureMessageConverters(converters);
    }
}

能够使用@JsonFormat(shape = JsonFormat.Shape.STRING,pattern = "yyyy-MM-dd HH:mm:ss", locale = "zh", timezone = "GMT+8")来格式化Date数据的输出. 默认日期是0时区的.早上8点会成为早上0点 对于@Transient注解是支持的,不会输出该注解修饰的字段

fastjson

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {

   @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        super.configureMessageConverters(converters);
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
      fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteNullStringAsEmpty,SerializerFeature.WriteNullNumberAsZero,
                SerializerFeature.WriteNullBooleanAsFalse,SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteEnumUsingToString,SerializerFeature.PrettyFormat,
               //禁止循环引用,不然会出现   {"$ref":"$.data.giveAuthorList[0].goods"}
                SerializerFeature.DisableCircularReferenceDetect,
    //全局date 默认输出格式为"yyyy-MM-dd HH:mm:ss"  可经过修改com.alibaba.fastjson.Json.DEFFAULT_DATE_FORMAT设置
                SerializerFeature.WriteDateUseDateFormat
);

        fastConverter.setFastJsonConfig(fastJsonConfig);
        converters.add(fastConverter);
    }
}

该配置支持1.2.10之后的版本,若是有问题,请升级fastjson的版本. 能够使用@JSONField来配置序列化的属性

@JSONField(format = "yyyy-MM-dd HH:mm:ss")

对于@Transient注解是不支持的,仍是会输出该注解修饰的字段;

fastJsonConfig.setSerializerFeatures(SerializerFeature... serializerFeatures),这个方法配置序列化的特性.可传入多个特性.以前只有一个SerializerFeature.PrettyFormat,因此字段值为空就没法输出该字段. 2月5号发现后添加了一些处理空值的特性,和

• SerializerFeature.WriteEnumUsingToString 处理枚举,输出toString().
• SerializerFeature.WriteDateUseDateFormat 处理date类型数据,开始全局默认转化,默认输出格式为"yyyy-MM-dd HH:mm:ss" 可经过修改com.alibaba.fastjson.Json.DEFFAULT_DATE_FORMAT设置