java web项目，java类中获得WEB-INF路径

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private
static String getWebInfPath() {

        URL url = 当前类.class.getProtectionDomain().getCodeSource().getLocation();

        String path = url.toString();

        int
index = path.indexOf("WEB-INF");

        if
(index == -1) {

            index = path.indexOf("classes");

        }

        if
(index == -1) {

            index = path.indexOf("bin");

        }

        path = path.substring(0, index);

        if
(path.startsWith("zip")) {// 当class文件在war中时，此时返回zip:D:/...这样的路径

            path = path.substring(4);

        } else
if (path.startsWith("file")) {// 当class文件在class文件中时，此时返回file:/D:/...这样的路径

            path = path.substring(6);

        } else
if (path.startsWith("jar")) {// 当class文件在jar文件里面时，此时返回jar:file:/D:/...这样的路径

            path = path.substring(10);

        }

        try
{

            path = URLDecoder.decode(path, "UTF-8");

        } catch
(UnsupportedEncodingException e) {

            e.printStackTrace();

        }

        return
path;

    }