Json字符串转换成Scala对象的一些注意事项
字符串:
{
"currentTime":1604475400444,
"dayString":"2020-11-04",
"hmString":"16:31",
"hmsString":"16:31:56",
"itemAveragePrice":23.582698961937723,
"itemCount":56,
"itemSaleTotalNum":289,
"itemSaleTotalPrice":6815.4000000000015,
"liveId":286066171497,
"shopCount":56
}
1、所需依赖:
<dependency> <groupId>org.json4s</groupId> <artifactId>json4s-jackson_2.10</artifactId> <version>3.2.10</version> </dependency>
2、手动导包
import org.json4s._ import org.json4s.jackson.JsonMethods._
3、手动导入隐式值
implicit val formats = DefaultFormats
4、转换成对象
val json = "要转换的json字符串" val value = parse(json).extract[要转换的实体类型] //要提前定义好接收数据的样例类 //可以对转换后的对象的属性进行操作 value.setSaleNum(value.getSaleNum+1L) value.setSalesVolume(value.getSalesVolume+2D)