java字符串操作：匹配、替换、萃取、分割拆分

java字符串操作：匹配、替换、萃取、分割拆分

package com.java.test;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class Demo {

public static void main(String[] args){

String str="78965djfkdj3456fereir57657orrrrr";

//匹配

boolean flag=str.matches(".*rrr.*");

System.out.println("是否匹配："+flag);

//替换

String str1=str.replace("\\r","w");

System.out.println("替换后的字符串为："+str1);

//萃取

Pattern strp=Pattern.compile("\\d+");

Matcher mc=strp.matcher(str);

System.out.print("萃取的数为：");

while(mc.find()){

System.out.print(" "+mc.group());

}

System.out.println("");

//分割拆分

String[] sp=str.split("\\d+");

System.out.print("分割拆分后为：");

for(int i=0;i<sp.length;i++){

System.out.print(sp[i]+" ");

}

}

}

打印结果如下：