@The difference and use of jsonformat and @datetimeformat

@DatetimeFormat Yes, it will String convert to Date, Generally, it is used when the foreground transmits values to the background

 import org.springframework.format.annotation.DateTimeFormat;

 /** *  When transferring from the front desk to the back desk ,  Strings are automatically encapsulated into dates  */
  @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
  private Date birth;
  

@JsonFormat(pattern=”yyyy-MM-dd”) take Date convert to String Generally, when the background transmits the value to the foreground

import com.fasterxml.jackson.annotation.JsonFormat;

 /** *  When the backstage returns to the front desk ,  Date auto format  */
  @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss",timezone = "GMT+8")
  private Date birth;
  

Be careful

@JsonFormat It can not only complete the type conversion of background to foreground parameter transfer , It can also realize the type conversion from foreground to background .

When content-type by application/json when , priority of use @JsonFormat Of pattern Do type conversion . Not used @DateTimeFormat Do type conversion .

@JsonFormat The function of annotation is to complete json String to java Object conversion , Independent of the direction of parameter passing .

then ：@DateTimeFormat and @JsonFormat Respectively belong to Spring and Jackson

Reference link ：https://www.cnblogs.com/wq-9/articles/12000799.html