如何在Java中的字符串中的数字和单词之间添加空格？ [英] How to add spaces between number and word in a string in Java?

问题描述

我有很多字符串，其中也包含数字，例如：LOD140IXAL COMP 1X240GG

i have a lot of string which contains also number like : LOD140IXAL COMP 1X240GG

如果没有，我想在数字和单词之间添加空格。
该数字可能在字符串中的每个位置。

I would like to put whitespace between numbers and word if there isn't. the number could be every where in the string.

推荐答案

一种做到这一点的方法是使用正则表达式。用单个空格替换以下怪物应该可以解决问题：

One way to do this is using regular expressions. Replacing the following monster with a single space should do the trick:

"(?<=[A-Za-z])(?=[0-9])|(?<=[0-9])(?=[A-Za-z])"

应用于示例（ LOD140IXAL COMP 1X240GG ）时，它会生成 LODIXAL COMP 1 X 240 MG 。

When applied to your example (LOD140IXAL COMP 1X240GG), it produces LODIXAL COMP 1 X 240 MG.

总而言之，正则表达式查找字母后紧跟数字，或查找紧跟数字后紧跟的字母，然后在它们之间插入一个空格。为此，它使用零宽度断言（先行和后行）。

In a nutshell, the regex looks for a letter immediately followed by a digit, or a digit immediately followed by a letter, and inserts a space between them. To achieve this, it uses zero-width assertions (lookahead and lookbehind).

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