[java]str.replaceAll(" ", "")替换空格不行

str.replaceAll(" ", ""); //去掉全部空格，包括首尾、中间

• 不行？
• 全角半角空格

https://blog.csdn.net/qq_33210042/article/details/78087713

https://www.cnblogs.com/shuilangyizu/p/6612240.html

https://www.runoob.com/java/java-string-trim.html