正则表达式

public class Demo01 {

public static void main(String[] args) {

//正则检验QQ号

String qq="1162026511";

String regex="[1-9][0-9]{4,14}";

System.out.println(qq.matches(regex));

//拆分字符串

String tel="177-533-02506";

String r="-";

String[] strs=tel.split(r);

for(int i=0;i<strs.length;i++){

System.out.println(strs[i]);

}

//替换符合规则的字符串

String str="hellowocaoni12ma";

String r2="[0-9]+";

String str2=str.replaceAll(r2,"*");

System.out.println(str2);

//正则验证手机号

String regex1="1[34578][0-9]{9}";

String tel1="17753302506";

System.out.println(tel1.matches(regex1));

//正则验证邮箱

String regex2="[a-zA-Z_0-9][email protected][a-zA-Z0-9]+(\\.[a-z]+)+";

String yx="[email protected]";

System.out.println(yx.matches(regex2));

//进行切割，去掉.符号

String regex3="\\.";

String ip="192.168.1.100";

String[] str1=ip.split(regex3);

for(int i=0;i<str1.length;i++){

System.out.println(str1[i]);

}

}

}