下面的代码工作正常:
// works
public class MyClass {
@JsonSerialize(using = LocalDateTimeSerializer.class)
@JsonDeserialize(using = LocalDateTimeDeserializer.class)
private LocalDateTime startDate;
@JsonSerialize(using = LocalDateTimeSerializer.class)
@JsonDeserialize(using = LocalDateTimeDeserializer.class)
private LocalDateTime endDate;
@JsonSerialize(using = LocalDateTimeSerializer.class)
@JsonDeserialize(using = LocalDateTimeDeserializer.class)
private LocalDateTime otherDate;
@JsonSerialize(using = LocalDateTimeSerializer.class)
@JsonDeserialize(using = LocalDateTimeDeserializer.class)
private LocalDateTime someMoreDate;
...}
但我不喜欢为每个日期字段编写完全相同的注释的重复方面。
我尝试过的:
// does not work
@JsonSerialize(using = LocalDateTimeSerializer.class)
@JsonDeserialize(using = LocalDateTimeDeserializer.class)
public class MyClass {
private LocalDateTime startDate;
private LocalDateTime endDate;
private LocalDateTime otherDate;
private LocalDateTime someMoreDate;
...}
尝试这样做会导致错误:
Caused by: com.fasterxml.jackson.databind.JsonMappingException:
class MyClass cannot be cast to class java.time.LocalDateTime (MyClass is in unnamed module of loader 'app'; java.time.LocalDateTime is in module java.base of loader 'bootstrap') (through reference chain: java.util.HashMap["ctxData"])
spring 应用程序的配置扩展了:
@Bean(name = "OBJECT_MAPPER_BEAN")
public ObjectMapper jsonObjectMapper() {
return Jackson2ObjectMapperBuilder.json()
.serializationInclusion(JsonInclude.Include.NON_NULL)
.featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
.modules(new JavaTimeModule())
.build();
}
有什么我可以尝试的想法吗?
最佳答案
如果你使用 jackson 来管理 json 序列化/反序列化,你可以全局配置 ObjectMapper
:
@Bean
public Jackson2ObjectMapperBuilder objectMapperBuilder() {
Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
builder.serializerByType(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ISO_DATE_TIME));
builder.deserializerByType(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ISO_DATE_TIME));
return builder;
}
关于java - 是否可以简化@JsonSerialize 注释?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55811031/