Java中各种正则表达式验证[邮箱、密码前后空格、日期合法、IP]
一、验证邮箱是否正确
public class ForTest {
public static void main(String[] args) {
System.out.println("123");
String email = "gengxiaopeng@hyper-telecom.com";
//boolean ss = email.matches("^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$");
System.out.print(email.matches("^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$"));
}
}
二、验证密码的开始或结尾不能为空格
密码的开始不能为空格:password.matches("^\s+.*");
密码的结束不能为空格:password.matches(".*\s+$")
三、判断给出的日期是否合法
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ForTest {
public static void main(String[] args) {
Pattern pattern = Pattern.compile("^((\d{2}(([02468][048])|([13579][26]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|([1-2][0-9])))))|(\d{2}(([02468][1235679])|([13579][01345789]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\s(((0?[0-9])|([1-2][0-3]))\:([0-5]?[0-9])((\s)|(\:([0-5]?[0-9])))))?$");
Matcher matcher = pattern.matcher("2015-04-30 23:59:59");
System.out.println(matcher.matches());
}
}
四、验证IP地址是否合法:255.255.255.255
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ForTest {
public static void main(String[] args) {
Pattern pattern1 = Pattern.compile("\b((?!\d\d\d)\d+|1\d\d|2[0-4]\d|25[0-5])\.((?!\d\d\d)\d+|1\d\d|2[0-4]\d|25[0-5])\.((?!\d\d\d)\d+|1\d\d|2[0-4]\d|25[0-5])\.((?!\d\d\d)\d+|1\d\d|2[0-4]\d|25[0-5])\b");
Matcher matcher1 = pattern1.matcher("127.400.600.2"); //以验证127.400.600.2为例
System.out.println(matcher1.matches());
}
}
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版权声明:本文为CSDN博主「NeverGiveUp7」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/gengxiaoming7/article/details/47979281
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