rcp（插件开发） 如何获取eclipse or rcp的安装目录

如题：

如下：

import java.net.URL;

import org.eclipse.core.runtime.Platform;

public class StudioInstallPathUtil {

public static String getStudioPath(){
String path = null;
//因为getInstallLocation已经单例模式,所以在此我们没必要单例了
org.eclipse.osgi.service.datalocation.Location location = Platform.getInstallLocation();
if (location != null) {
URL url = location.getURL();
path = url.getPath();
path=path.substring(1, path.length()-1);
}
return path;
}
}