利用properties资源文件追加写入，而不覆盖

利用properties资源文件追加写入，而不覆盖

Properties pro = new Properties();

            pro.load(new FileInputStream("readxmllasttime.porperties"));

            for (Enumeration e = pro.propertyNames(); e.hasMoreElements();) {

                String s = (String) e.nextElement(); // 遍历所有元素

                if (s.equals(key)) {

                    /**如果键相同则覆盖*/

                    pro.setProperty(key, maxdate.getTime() + "");

                } else {

/**否则就原样写入*/

                    pro.setProperty(s, pro.getProperty(s));

                }

            }

            pro.store(new FileOutputStream("readxmllasttime.porperties"),"描述信息");