通过snakeyaml解析yaml文件

scala 读取yaml 配置文件

1. 配置maven文件
   pom.xml

      <dependency>
         <groupId>org.yaml</groupId>
         <artifactId>snakeyaml</artifactId>
         <version>1.17</version>
     </dependency>

2. 创建yaml 文件
   config.yaml

    name: CCC
    age: 26
    city: TRUE
    height: 0.015
    details:
       -  first_name: chuchu
          last_name: chen
          home: 泰兴
       -  first_name: chuchu1
          last_name: chen1
          home: 泰兴1

3. 实现方式两种

   1. 通过实体类获取yaml配置文件数据
   • 实体类创建
     SpeedyConfig

     package com.test
     import scala.beans.BeanProperty
     import java.util
     class SpeedyConfig extends Serializable {
           @BeanProperty var name: String = _
           @BeanProperty var age: Int = _
           @BeanProperty var city: String = _
           @BeanProperty var height: Float = _
           @BeanProperty var details: util.ArrayList[util.HashMap[String,Object]] 
     = _
      }
   

   • 实现类
     yaml_entity_test

       package com.test
       import org.yaml.snakeyaml.Yaml
       import org.yaml.snakeyaml.constructor.Constructor
   
       object yaml_entity_test {
           def main(args: Array[String]): Unit = {
               val stream = getClass.getResourceAsStream("config.yaml")
               val yaml = new Yaml(new Constructor(classOf[SpeedyConfig]))
               val config: SpeedyConfig = yaml.load(stream).asInstanceOf[SpeedyConfig]
               println(s"${config.getName}, ${config.getAge}, ${config.getCity}")
               println(config.getDetails)
           }
       }
   

   2. 通过map 获取yaml 配置文件数据
   • 实现类
     yaml_map_test

      package com.test
      import org.yaml.snakeyaml.Yaml
      import java.util
   
      object yaml_map_test {
          def main(args: Array[String]): Unit = {
               val filePath = System.getProperty("user.dir")
               val yamlPath = filePath+"/src/conf/config.yaml"
               //读取指定路径yaml 文件
               val stream = new FileInputStream(new File(yamlPath))
              // 只能获取当前程序相同目录文件
               val stream = getClass.getResourceAsStream("config.yaml")
               val yaml = new Yaml()
               val obj = yaml.load(stream).asInstanceOf[util.HashMap[String, Object]]
   
               val stringValue   = obj.get("name")
               val intValue      = obj.get("age").asInstanceOf[Int]
               val booleanValue  = obj.get("city").asInstanceOf[Boolean]
               val floatValue    = obj.get("height").asInstanceOf[Double].toFloat
               val mapValue = obj.get("details").asInstanceOf[util.ArrayList[util.HashMap[String,Object]]]
               println(s"name    -> ${stringValue}, " +
      s"age     -> ${intValue}, " +
      s"city    -> ${booleanValue}, " +
      s"height  -> ${floatValue}")
               println(s"map -> ${mapValue}")
   
           }
        }