如何將Properties排序輸出?

參考How to sort Properties ??這篇裡面最簡單的作法是:

public class SortedProperties extends Properties {

    public synchronized Enumeration keys() {

        Enumeration keysEnum = super.keys();

        Vector keyList = new Vector();

        while(keysEnum.hasMoreElements()){

            keyList.add(keysEnum.nextElement());

        }

        Collections.sort(keyList);

        return keyList.elements();

    }

}

使用方式就跟原本的Properties類別一樣:


    Properties p = new SortedProperties();

    p.putAll(globals.installation);

    try {

        FileOutputStream out = new FileOutputStream(globals.installationConfig);

        p.store(out, "Installation specific configuration options");

        out.close();

    }

    catch (IOException e) {

        throw new ForumException(e);

    }