java - 如何用空格拆分字符串并将空格作为结果中的元素包含在内？多个空格拆分

Question

我用来用任意数量的空格分割字符串的代码是

String out="SELECT * FROM EMP WHERE EMPID=10";
String array[] = out.split("\\s+");

我想在用空格拆分时将“out”字符串中的空格包含到 array[] 对象中。 我想要的输出是:

array[]={"SELECT","[WHITE SPACE]","*","[WHITE SPACE]","FROM","[WHITE SPACE]","EMP","[WHITE SPACE]","WHERE","[WHITE SPACE]","EMPID=10"}

但是我得到的输出是:

 array[]={"SELECT","*","FROM","EMP","WHERE","EMPID=10"}

任何帮助将不胜感激

Answer 1

由于 split 接受正则表达式，您可以使用 lookarounds :

out.split("(?<=\\s)|(?=\\s)");

这将输出:

[SELECT,  , *,  , FROM,  , EMP,  , WHERE,  , EMPID=10]

请注意，分隔符(在您的情况下为空格)包含在结果中。