javascript - Java 与 JavaScript 拆分行为

Question

Java 和 JavaScript 之间的拆分功能似乎有所不同。

我并不完全需要匹配某个正则表达式标准，或者使用 基于前瞻的正则表达式。我的问题在于在拆分正则表达式(这是一组简单的字符而不是表达式)的最终匹配之后尾随空匹配。

下面是我试图实现的输出示例以及我真正得到的结果。

Java

("~#~~#~~#~A~#~B~#~C~#~D~#~E~#~~#~~#~").split("~#~")

/* results with an array of length 8 */ (java.lang.String[]) [, , , A, B, C, D, E]

Javascript

 "~#~~#~~#~A~#~B~#~C~#~D~#~E~#~~#~~#~".split("~#~")
 /* results with an array of length 11 */ ["", "", "", "A", "B", "C", "D", "E", "", "", ""]

我真的无法对此做出很好的解释，因为我正在使用 Java 应用程序并且拆分给我带来了麻烦，我想要与 JavaScript 中相同的结果。我怎样才能得到它？

Answer 1

关于 split(String regex) 的 Javadoc:

This method works as if by invoking the two-argument split method with the given expression and a limit argument of zero. Trailing empty strings are therefore not included in the resulting array.

关于 split(String regex, int limit) 的 Javadoc:

If n is non-positive then the pattern will be applied as many times as possible and the array can have any length. If n is zero then the pattern will be applied as many times as possible, the array can have any length, and trailing empty strings will be discarded.

所以... split("~#~", -1) 应该可以解决问题。