How to format date using JsonFormat

I want to format the data using @JsonFormat and exclude the nanosecond.

[
  {
    "createtime": "2021-02-08 16:44:41.336475",
    "orderdate": "2021-02-03 22:55:54.764"
  },
  {
    "createtime": "2021-02-08 16:44:41.3365",
    "orderdate": "2021-02-03 22:55:54.4"
  }
]

The no of digits of nanoseconds is not fixed. Below is the code I've written

@JsonProperty("createtime")
@JsonFormat(shape = JsonFormat.Shape.STRING,pattern = "yyyy-MM-dd HH:mm:ss.SSSSSS")
private LocalDateTime createTime;

@JsonProperty("orderdate")
@JsonFormat(shape = JsonFormat.Shape.STRING,pattern = "yyyy-MM-dd HH:mm:ss.SSS")
private LocalDateTime orderDate;

when "createtime": 2021-02-08 15:14:41.33675, I'm getting Failed to deserialize java.time.LocalDateTime. Please advise me how can I format the date in yyyy-MM-dd HH:mm:ss format. Thanks in advance

Firstly, regarding your question about deserializing JSON data into a Java LocalDateTime property, you could use the following approach:

class Timed {
  
    private DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSSSSS");
    
    @JsonIgnore
    private LocalDateTime createTime = LocalDateTime.now();
    
    public LocalDateTime getCreateTime() {
      return createTime;
    }

    public void setCreateTime(LocalDateTime createTime) {
      this.createTime = createTime;
    }
    
    @JsonProperty("createtime")
    public String createTime() {
      return formatter.format(createTime);
    }
 
    @JsonCreator
    public void setCreateTime(@JsonProperty("createtime") String property) {
      createTime = LocalDateTime.parse(json, formatter).truncatedTo(ChronoUnit.SECONDS);
    }
    
    @Override
    public String toString() {
      return "Timed{"createTime=" + createTime + '}';
    }
}

Update: You could completely remove the nanoseconds:

private DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    
@JsonCreator
public void setCreateTime(@JsonProperty("createtime") String property){
    String withoutNanos = property.split("\\.")[0];
    createTime = LocalDateTime.parse(withoutNanos, formatter);
}