在Java编程中，如何验证电子邮件地址格式？
以下示例演示如何使用String类的matches()方法来验证电子邮件地址。
package com.yiibai;
public class ValidateEmailFormat { public static void main(String[] args) { String EMAIL_REGEX = "^[\\w-_\\.+]*[\\w-_\\.]\\@([\\w]+\\.)+[\\w]+[\\w]$"; String email1 = "[email protected]"; Boolean b = email1.matches(EMAIL_REGEX); System.out.println("is e-mail: " + email1 + " :Valid = " + b); String email2 = "admin^domain.co.in"; b = email2.matches(EMAIL_REGEX); System.out.println("is e-mail: " + email2 + " :Valid = " + b); } } 上述代码示例将产生以下结果 -
is e-mail: [email protected] :Valid = true
is e-mail: admin^domain.co.in :Valid = false
示例-2
以下是如何验证电子邮件地址格式的另一个示例。
package com.yiibai;
import java.util.ArrayList; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; public class ValidateEmailFormat2 { public static void main(String args[]) { List emails = new ArrayList(); emails.add("[email protected]"); emails.add("[email protected]"); emails.add("maxsu%google-cn.com"); emails.add("[email protected]"); emails.add("said#@youtube.co.in"); emails.add("atosll@domaincom"); emails.add("kitte#gmail.com"); emails.add("@yiibai.com"); String regex = "^(.+)@(.+)$"; Pattern pattern = Pattern.compile(regex); for (Object email : emails) { Matcher matcher = pattern.matcher((CharSequence) email); System.out.println(email + " : " + matcher.matches()); } } } 上述代码示例将产生以下结果 -
[email protected] : true
[email protected] : true
maxsu%google-cn.com : false
[email protected] : true
said#@youtube.co.in : true
atosll@domaincom : true
kitte#gmail.com : false
@yiibai.com : false