Java Jackson反序列化枚举值
当我传递null值时,是否可以为enum设置默认值Java Jackson反序列化枚举值,java,spring,enums,jackson,Java,Spring,Enums,Jackson,当我传递null值时,是否可以为enum设置默认值 public enum Something { @JsonEnumDefaultValue A(new BigDecimal(123)), B(new BigDecimal(555)), C(new BigDecimal(21312)); private BigDecimal value; Something(BigDecimal value) { this.value = value; } public BigDecimal g
public enum Something {
@JsonEnumDefaultValue
A(new BigDecimal(123)),
B(new BigDecimal(555)),
C(new BigDecimal(21312));
private BigDecimal value;
Something(BigDecimal value) {
this.value = value;
}
public BigDecimal getValue() {
return value;
}
}
我的DTO中有一个enum作为字段,当我传递null值时-jackon将其反序列化为null,但当我传递一些奇怪的东西时-它设置默认值。我的jackson配置在这里:
@Bean
public ObjectMapper mapper() {
val mapper = new ObjectMapper();
return mapper.enable(DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_USING_DEFAULT_VALUE);
}
Dto类别:
public class Dto {
private Something something;
private Smth smth;
private String name;
}
控制器:
@PostMapping
public ResponseEntity<Long> saveEntity(@RequestBody Dto dto) {
return ResponseEntity.ok(repository.save(
MyEntity.builder()
.name(dto.getName())
.something(dto.getSomething())
.smth(dto.getSmth())
.build())
.getId());
}
您需要在类级别提供默认值,然后它将适用于空值 例如:
是的,当我移除lombok@AllArgsConstructor时,它对我起了作用。Jackson用空值调用它,而我的字段init失败了。
class Dto {
private Something something = Something.A;
private Smth smth;
private String name;
}