如何以定义的顺序编写Java属性？ [英] How can I write Java properties in a defined order?

问题描述

我正在使用java.util.Properties的store（Writer，String）方法来存储属性。在生成的文本文件中，属性以偶然的顺序存储。

I'm using java.util.Properties's store(Writer, String) method to store the properties. In the resulting text file, the properties are stored in a haphazard order.

这就是我正在做的事情：

This is what I'm doing:

Properties properties = createProperties();
properties.store(new FileWriter(file), null);

如何确保按字母顺序或按添加属性的顺序写出属性？

How can I ensure the properties are written out in alphabetical order, or in the order the properties were added?

我希望解决方案比手动创建属性文件更简单。

I'm hoping for a solution simpler than "manually create the properties file".

推荐答案

根据新白痴的建议，按字母顺序排列。

As per "The New Idiot's" suggestion, this stores in alphabetical key order.

Properties tmp = new Properties() {
    @Override
    public synchronized Enumeration<Object> keys() {
        return Collections.enumeration(new TreeSet<Object>(super.keySet()));
    }
};
tmp.putAll(properties);
tmp.store(new FileWriter(file), null);

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