public URL getResource(String name)的教训

getResource
public URL getResource(String name)
Finds a resource with a given name. The rules for searching resources associated with a given class are implemented by the defining class loader of the class. This method delegates to this object's class loader. If this object was loaded by the bootstrap class loader, the method delegates to ClassLoader.getSystemResource(java.lang.String).
Before delegation, an absolute resource name is constructed from the given resource name using this algorithm:
If the name begins with a '/' ('/u002f'), then the absolute name of the resource is the portion of the name following the '/'.
Otherwise, the absolute name is of the following form:
modified_package_name/name
Where the modified_package_name is the package name of this object with '/' substituted for '.' ('/u002e').

Parameters:
name - name of the desired resource
Returns:
A URL object or null if no resource with this name is found
Since:
JDK1.1
返回的"/"表示类路径，而不是文件分隔符