java向文本追加行

 /**
         * 写文件
         * 
         * @param path
         * @param filename
         * @return
         */
        public static boolean writeFile(String path) {

                File file = new File("/etc/profile");
                FileWriter fw;
                try {
                        fw = new FileWriter(file,true); //此项为true是关键,若不填,评测将会用一空白文件覆盖原件
                        fw.write("export ZhenXuani=留个言吧" );
                                              fw.close();
                } catch (IOException e) {
                        return false;
                }
                return true;
        }