1、自定义序列化类

import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializerBase;

@JacksonStdImpl
public class ToDateStringSerializer extends ToStringSerializerBase {

    public ToDateStringSerializer() {
        super(Object.class);
    }
    
    public final String valueToString(Object value) {
        return DateUtils.long2String((Long) value);
    }
}

2、接口的返回类加对应的注解

 @ApiModelProperty(value = "任务上传日期")
 @JsonSerialize(using = ToDateStringSerializer.class)
 private Long taskTime;

3、查看成果