package com.jaxc.scan; import java.util.regex.Matcher; import java.util.regex.Pattern; public class ReadTxtUtils{ public static void main(String[] args) { String s = "我爱 五星红旗"; System.out.println(s.replaceAll(" ", ",").trim()); //处理后输出:我爱,,,,,,,,,,五星红旗 String regEx = "[' ']+"; // 一个或多个空格 Pattern p = Pattern.compile(regEx); Matcher m = p.matcher(s); System.out.println(m.replaceAll(",").trim()); //处理后输出:我爱,五星红旗 } }
处理字符串单个或多个空格替换