web项目读取日志文件

//得到路径     String appPath = filterConfig.getServletContext().getRealPath("/");        // 获取downLoadLog.txt文件        File logFile = new File(appPath, "downloadLog.txt");        if (!logFile.exists()) {            try {                logFile.createNewFile();            } catch (IOException e) {                e.printStackTrace();            }        }