Converts a timestamp to a time in the specified format

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class JsonTimeSerializer extends JsonSerializer<Long> {  
      private SimpleDateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
      @Override  
      public void serialize(Long datel, JsonGenerator gen, SerializerProvider provider)  throws IOException, JsonProcessingException {  
         if(datel.toString().length()<13){
             datel= datel*1000L;
         }
          Date date= new Date(datel);
          String value = dateFormat.format(date);  
          gen.writeString(value);  
      }  
}  

// Use

@JsonSerialize(using = JsonTimeSerializer.class) public void setAddTime(Long addTime) { this.addTime = addTime; }

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;


public class JsonDateSerializer extends JsonSerializer<Long> {
      private SimpleDateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd");
      @Override  
      public void serialize(Long datel, JsonGenerator gen, SerializerProvider provider)  throws IOException, JsonProcessingException {  
         if(datel.toString().length()<13){
             datel= datel*1000L;
         }
          Date date= new Date(datel);
          String value = dateFormat.format(date);  
          gen.writeString(value);  
      }  
   }  

// Use

@JsonSerialize(using = JsonDateSerializer.class)
public Long getAdd_time() {
    return add_time;
}