JAVA读取路径问题

import java.io.File;
public class FileTest {
public static void main(String[] args) throws Exception {
System.out.println(Thread.currentThread().getContextClassLoader().getResource(""));
System.out.println(FileTest.class.getClassLoader().getResource(""));
System.out.println(ClassLoader.getSystemResource(""));
System.out.println(FileTest.class.getResource(""));
System.out.println(FileTest.class.getResource("/")); //Class文件所在路径
System.out.println(new File("/").getAbsolutePath());
System.out.println(System.getProperty("user.dir"));
}
}

输出的结果为：

file:/E:/Test/ReadXML/
file:/E:/Test/ReadXML/
file:/E:/Test/ReadXML/
file:/E:/Test/ReadXML/
file:/E:/Test/ReadXML/
E:\
E:\Test\ReadXML