public static String DEPLOY_PATH = null;
static
{
String CurrentClassFilePath = Constant.class.getResource("").getPath();
int lastpath = CurrentClassFilePath.lastIndexOf("WEB-INF/");
DEPLOY_PATH = CurrentClassFilePath.substring(0, lastpath);
}
参考：http://blog.sina.com.cn/s/blog_6f3da9650101d70r.html
http://tech.ddvip.com/2011-11/1322014194170006.html
原文：http://blog.csdn.net/coslay/article/details/44244473