Java和字符串拆分 [英] Java and string split

问题描述

使用函数拆分拆分此String。这是我的代码：

split this String using function split. Here is my code:

String data= "data^data";
String[] spli = data.split("^");

当我尝试在spli中只包含一个字符串时。看起来java在拆分时看不到^。有谁知道我怎么能用字母^分割这个字符串？

When I try to do that in spli contain only one string. It seems like java dont see "^" in splitting. Do anyone know how can I split this string by letter "^"?

编辑

求助：P

推荐答案

这是因为 String.split 采用正则表达式，而不是文字字符串。您必须转义 ^ ，因为它在正则表达式中具有不同的含义（在字符串的开头处为锚点）。因此，拆分实际上将在第一个字符之前完成，为您提供完整的字符串保持不变。

This is because String.split takes a regular expression, not a literal string. You have to escape the ^ as it has a different meaning in regex (anchor at the start of a string). So the split would actually be done before the first character, giving you the complete string back unaltered.

您使用 \转义正则表达式元字符，在Java字符串中必须是 \\ ，所以

You escape a regular expression metacharacter with \, which has to be \\ in Java strings, so

data.split("\\^")

应该工作。

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