JAVA 访问WebRoot下的目录文件

转自 http://blog.csdn.net/jian_csdn/article/details/46119313
 
            ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
            if (classLoader == null) {
                classLoader = ClassLoader.getSystemClassLoader();
            }

            /**
             * 获取到webroot里面的数据
             */
            java.net.URL url2 = classLoader.getResource("");
            String ROOT_CLASS_PATH = url2.getPath() + "/";
            File rootFile = new File(ROOT_CLASS_PATH);
            String WEB_INFO_DIRECTORY_PATH = rootFile.getParent() + "/";
            File webInfoDir = new File(WEB_INFO_DIRECTORY_PATH);
            String SERVLET_CONTEXT_PATH = webInfoDir.getParent() + "/";
            // 这里 SERVLET_CONTEXT_PATH 就是WebRoot的路径
            String path = SERVLET_CONTEXT_PATH + "/" + "file/db.txt";