[Fix-491][admin,web] Fix refresh the status page with abnormal jitter

[Fix-491][admin,web] Fix refresh the status page with abnormal jitter

dlink-admin/src/main/java/com/dlink/model/JobInstance.java

 package com.dlink.model;
 
 import com.baomidou.mybatisplus.annotation.*;
+import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 
@@ -39,12 +40,15 @@ public class JobInstance implements Serializable {
 
     private String error;
 
+    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss")
     @TableField(fill = FieldFill.INSERT)
     private LocalDateTime createTime;
 
+    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss")
     @TableField(fill = FieldFill.INSERT_UPDATE)
     private LocalDateTime updateTime;
 
+    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss")
     private LocalDateTime finishTime;
 
     private Long duration;