我有一个下面的枚举:
public enum OrderType { UNKNOWN(0, "Undefined"), TYPEA(1, "Type A"), TYPEB(2, "Type B"), TYPEC(3, "Type C"); private Integer id; private String name; private WorkOrderType(Integer id, String name) { this.id = id; this.name = name; } //Setters, getters.... }
我用控制器(new OrderType[] {UNKNOWN,TYPEA,TYPEB,TYPEC};)返回枚举数组,Spring将其序列化为以下json字符串:
new OrderType[] {UNKNOWN,TYPEA,TYPEB,TYPEC}
["UNKNOWN", "TYPEA", "TYPEB", "TYPEC"]
强迫Jackson像POJO一样序列化枚举的最佳方法是什么?例如:
[ {"id": 1, "name": "Undefined"}, {"id": 2, "name": "Type A"}, {"id": 3, "name": "Type B"}, {"id": 4, "name": "Type C"} ]
我使用了不同的注解,但无法获得这样的结果。
终于我找到了解决方案。
我必须用注释枚举@JsonSerialize(using = OrderTypeSerializer.class)并实现自定义序列化程序:
@JsonSerialize(using = OrderTypeSerializer.class)
public class OrderTypeSerializer extends JsonSerializer<OrderType> { @Override public void serialize(OrderType value, JsonGenerator generator, SerializerProvider provider) throws IOException, JsonProcessingException { generator.writeStartObject(); generator.writeFieldName("id"); generator.writeNumber(value.getId()); generator.writeFieldName("name"); generator.writeString(value.getName()); generator.writeEndObject(); } }