JAVA 正则表达式匹配空格或换行符

Answer 1

Try this

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class c_170222 {
    public static String getStringNoBlank(String str) {      
        if(str!=null && !"".equals(str)) {      
            Pattern p = Pattern.compile("\s*|\t|\r|\n");      
            Matcher m = p.matcher(str);      
            String strNoBlank = m.replaceAll("");      
            return strNoBlank;      
        }else {      
            return str;      
        }           
    } 
 }