如何在java中对属性进行排序？ [英] How to sort Properties in java?

问题描述

我有一个Properties变量，有时我需要添加其他属性。

I have a Properties variable and sometimes I need to add other Properties to it.

Properties myBasicProps = this.getClass.getResourceAsStream(MY_PROPS_PATH);
...
Properties otherProps = new Properties();
otherProps.load(new StringReader(tempPropsString)); //tempPropsString contains my temporary properties
myBasicProps.putAll(otherProps);

我想在此之后排序 myBasicProps 。我不想获取所有键和值，使用 Collections.sort（）对它们进行排序，然后将其全部放入新对象。还有更好的方法吗？

I want to sort myBasicProps after this. I don't want to get all keys and values, sort them with Collections.sort() and then put it all to a new object. Is there a better way?

推荐答案

不， java.util.Properties extends java.util.Hashtable ，它没有为键或值定义可预测的排序顺序。

No, java.util.Properties extends java.util.Hashtable which doesn't define a predictable sort order for keys or values.

你可以尝试将所有值转储为类似 java.util.TreeMap 的内容，这会对您的密钥进行自然排序。

You could try dumping all values into something like java.util.TreeMap, which will impose a natural ordering on your keys.

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