当 @JsonPropertyOrder用在类上, @JsonProperty用在字段上时, 
JsonPropertyOrder优先级更高, JsonProperty不会生效

@JsonPropertyOrder({"code", "name"})
class Student{@JsonProperty(value = "name", index=10) //index按绝对值从小到大排序private String name = "tom";    @JsonProperty(value = "code", index=20)private String code = "1";public static void main(String[] args) throws JsonProcessingException {System.out.println(new ObjectMapper().writeValueAsString(new Student()));}
}

{"code": "1", "name": "tom"}

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ps: 在用JsonPropertyOrder时, 别写成了  @JsonPropertyOrder({"code, name"})

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属性序列化自定义排序与字母表排序-JSON框架Jackson精解第3篇-腾讯云开发者社区-腾讯云