Java解析yml工具类YmlUtil.java

Java解析yml的工具类，递归调用并返回Map

package cn.studyjava.canal.common.util;

import java.io.FileInputStream;
import java.net.URL;
import java.util.Iterator;
import java.util.Map;

import org.apache.logging.log4j.core.config.plugins.util.ResolverUtil.Test;
import org.yaml.snakeyaml.Yaml;

import com.google.common.collect.Maps;

/**
 * @author zsljava 2017年12月13日 下午2:16:49
 * @since 1.0.0
 */
public class YmlUtil {
    
    private static Map<String, Object> ymlMap = null;

    static{
        ymlMap = Maps.newConcurrentMap();
        getApplicationYml();
    }
    
    /**
     * 
     */
    public YmlUtil(){
        super();
    }

    @SuppressWarnings("unchecked")
    private static Map<String, Object> getApplicationYml(){
        try {
            Yaml yaml = new Yaml();
            URL url = ClassLoader.getSystemResource("application.yml");
            if (url != null) {
                Map<String, Object> map = yaml.loadAs(new FileInputStream(url.getFile()), Map.class);
                switchToMap(null, map);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ymlMap;
    }
    
    @SuppressWarnings("unchecked")
    private static void switchToMap(String myKey,Map<String, Object> map){
        Iterator<String> it = map.keySet().iterator();
        myKey = myKey == null ? "" : myKey;
        String tmpkey = myKey;
        while(it.hasNext()){
            String key = it.next();
            myKey = tmpkey +key;
            Object value = map.get(key);
            if(value instanceof Map){
                switchToMap(myKey.concat("."), (Map<String, Object>)value);
            }else{
                if(null != value){
                    ymlMap.put(myKey, value);
                }
//                System.out.println(myKey+"->"+map.get(key));
            }
        }
    }
    
    @SuppressWarnings("unchecked")
    public static <T> T get(String key){
        return (T) ymlMap.get(key);
    }
    
    public static String getStr(String key){
        return String.valueOf(ymlMap.get(key));
    }
    
}