java获取Resources目录文件问题

问题

为什么resource1能获取到，而resource获取不到呢？

目录结构

-java
  - com.xxx
    -YmlTest.java
- resources
  application.yml

YmlTest.java代码

 public class YmlTest {
    public static void main(String[] args){
        Yaml yaml = new Yaml();
        //下面两个获取的都是YmlTest本身所在的classloader
        URL resource = YmlTest.class.getResource("application.yml");
        URL resource1 = YmlTest.class.getClassLoader().getResource("application.yml")；
    }
}

问题解决

查看Class代码

  public java.net.URL getResource(String name) {
      //这里会把传入的名称，update成当前类 包名 + "/" + name
        name = resolveName(name);
        ClassLoader cl = getClassLoader0();
        if (cl==null) {
            // A system class.
            return ClassLoader.getSystemResource(name);
        }
        return cl.getResource(name);
    }

  public URL getResource(String name) {
        URL url;
        if (parent != null) {
            url = parent.getResource(name);
        } else {
            url = getBootstrapResource(name);
        }
        if (url == null) {
            url = findResource(name);
        }
        return url;
    }