java获得当前路径下的绝对路径的方法，或者某一文件的绝对路径

java获得当前路径下的绝对路径的方法。或者某一文件的绝对路径

import java.net.URL;
import java.security.CodeSource;
import java.security.ProtectionDomain;

public class TestPath {

	public static void main(String[] args) {
		ProtectionDomain domain = TestPath.class.getProtectionDomain();
		CodeSource codeSource = domain.getCodeSource();
		URL location = codeSource.getLocation();
		String path = location.getPath();
		System.out.println(path);
		
		URL url = TestPath.class.getClassLoader().getResource("log4j.xml");
		String aurl = url.getPath();
		System.out.println(aurl);

		URL pathUrl = TestPath.class.getResource("");
		System.out.println(pathUrl.getPath());
	}

}import jav