我正在使用Spring Boot + Spring data Redis
示例将Date保存到Redis缓存中。尽管我使用了@DateTimeFormat @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
,但是持久性仍然是长期价值。看起来像毫秒。
如果我需要设置其他配置来保留日期,例如yyyy-MM-dd
,可以有人指导。
HGETALL users:1
1) "_class"
2) "com.XXX.entity.User"
3) "userId"
4) "1"
5) "name"
6) "John"
7) "createdDate"
8) "1542043247352"
实体类:
@Builder
@Data
@AllArgsConstructor
@NoArgsConstructor
@RedisHash("users")
public class User {
@Id
private Long userId;
private String name;
@DateTimeFormat
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
private Date createdDate;
private List<Group> groups;
}
UPDATE-1 ::按照我执行的建议,但仍无法正常工作 CustomDateSerializer.java
@Component
public class CustomDateSerializer extends JsonSerializer<Date> {
private static final SimpleDateFormat dateFormat = new SimpleDateFormat("MM-dd-yyyy");
@Override
public void serialize(Date date, JsonGenerator gen, SerializerProvider provider)
throws IOException, JsonProcessingException {
String formattedDate = dateFormat.format(date);
gen.writeString(formattedDate);
}
}
自定义界面
@Retention(RetentionPolicy.RUNTIME)
public @interface MyJsonFormat {
String value();
}
模型类
@MyJsonFormat("dd.MM.yyyy")
@JsonSerialize(using = CustomDateSerializer.class)
private Date createdDate;
答案 0 :(得分:0)
我建议您改用LocalDateTime
(如果您愿意,也可以使用LocalDate)。然后,您可以使用
@JsonDeserialize(using = LocalDateTimeDeserializer.class)
@JsonSerialize(using = LocalDateTimeSerializer.class)
private LocalDateTime createdAt;
使用杰克逊的jsr310添加:
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
答案 1 :(得分:-1)
通过使用自定义序列化程序,可以解决此问题。引用@ {https://kodejava.org/how-to-format-localdate-object-using-jackson/#comment-2027
public class LocalDateSerializer extends StdSerializer<LocalDate> {
private static final long serialVersionUID = 1L;
public LocalDateSerializer() {
super(LocalDate.class);
}
@Override
public void serialize(LocalDate value, JsonGenerator generator, SerializerProvider provider) throws IOException {
generator.writeString(value.format(DateTimeFormatter.ISO_LOCAL_DATE));
}
}
POJO:
@JsonDeserialize(using = LocalDateDeserializer.class)
@JsonSerialize(using = LocalDateSerializer.class)
private LocalDate createdDate;