java集合與scala集合相互轉換

java類型的map轉為scala類型map

package com.xxx.spark.flow.util.common;

import scala.collection.JavaConverters;
import scala.collection.Map$;
import java.util.Map;

/**
 * @AUTHOR Guozy
 * @DESCRIBTION some methods about map
 * @DATE 2020/12/25-11:40
 **/
public class MapUtils {
    /**
     * convert java's map to scala's map
     *
     * @param map java.util.map
     * @return map scala.collection.immutable.map
     */
    public static scala.collection.immutable.Map<String, String> javaMapConvertToScalaMap(Map<String, String> map) {
        scala.collection.mutable.Map<String, String> scalaMap = JavaConverters.mapAsScalaMapConverter(map).asScala();
        Object objMap = Map$.MODULE$.<String, String>newBuilder().$plus$plus$eq(scalaMap.toSeq());
        Object BuildResObjMap = ((scala.collection.mutable.Builder) objMap).result();
        scala.collection.immutable.Map<String, String> targetScalaMap = (scala.collection.immutable.Map) BuildResObjMap;
        return targetScalaMap;
    }
}