java去除字符串中的空格、回车、换行符、制表符
http://cindysaj.iteye.com/blog/299476


java去除字符串中的空格、回车、换行符、制表符

import java.util.regex.Matcher; import java.util.regex.Pattern; public class StringUtil { public static void replaceBlank() {    Pattern p = Pattern.compile(“\\s*|\t|\r|\n”);    String str="I am a, I am Hello ok, \n new line ffdsa!";    System.out.println("before:"+str);    Matcher m = p.matcher(str);    String after = m.replaceAll("");    System.out.println("after:"+after); } public static void main(String[] args) {      replaceBlank();    } } 

p = Pattern.compile("\'");m = p.matcher(columnValue);columnValue = m.replaceAll("\'\'");