FastJsonHttpMessageConvertersConfiguration.java 文件源码

@Bean
@ConditionalOnMissingBean({ FastJsonHttpMessageConverter4.class })
//当没有注册这个类时，自动注册Bean
public FastJsonHttpMessageConverter4 fastJsonHttpMessageConverter() {
    FastJsonHttpMessageConverter4 converter = new FastJsonHttpMessageConverter4();

    //使用最新的官方推荐配置对象的方式来注入fastjson的序列化特征
    FastJsonConfig fastJsonConfig = new FastJsonConfig();
    fastJsonConfig.setSerializerFeatures(
            SerializerFeature.WriteDateUseDateFormat,
            SerializerFeature.WriteNullListAsEmpty,
            SerializerFeature.WriteMapNullValue,
            SerializerFeature.WriteNullBooleanAsFalse,
            SerializerFeature.WriteNullStringAsEmpty
     );

    //添加对json值的过滤，因为像移动APP，服务端在传json值时最好不要传null，而是使用“”，这是一个演示
    ValueFilter valueFilter = new ValueFilter() {//5
        //o 是class
        //s 是key值
        //o1 是value值
        public Object process(Object o, String s, Object o1) {
            if (null == o1) {
                o1 = "";
            }
            return o1;
        }
    };
    fastJsonConfig.setSerializeFilters(valueFilter);

    converter.setFastJsonConfig(fastJsonConfig);

    return converter;
}