spring data jpa 自定义转换器converter

package com.comon.utils;


import java.io.IOException;
import java.io.Serializable;

import javax.persistence.AttributeConverter;

import com.fasterxml.jackson.databind.ObjectMapper;

import lombok.extern.slf4j.Slf4j;


@Slf4j
public class JpaConverterJsonUtils implements AttributeConverter<Object,String>,Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
    
    public String convertToDatabaseColumn(Object attribute) {
        try {
            return OBJECT_MAPPER.writeValueAsString(attribute);
        } catch (Exception e) {
            log.error("convert data error,the exception is {}",e);
            return null;
        }
        
    }

    public Object convertToEntityAttribute(String dbData) {
        try {
            if(dbData!=null){
                return OBJECT_MAPPER.readValue(dbData, Object.class);
            }
        } catch (IOException e) {
            log.error("convert data error,the exception is {}",e);
            return null;
        }
        return dbData;
    }

}

    @Convert(converter=JpaConverterJsonUtils.class)
    private List<JSONObject> milestones; //在ｄｂ中为ｊｓｏｎ 类型