利用Java的字符串处理技术,编写一个验证Email地址合法性的程序

实现原理，实际上就是输入一个字符串，之后通过正则表达式验证此字符串是否符合邮箱的格式规范，通过以下工具类即可：

 import java.util.regex.Matcher; 
import java.util.regex.Pattern;
 public class RegisterCheck { 
    /** 
     * 验证输入的邮箱格式是否符合 
     * @param email 
     * @return 是否合法 
     */ 
public static boolean emailFormat(String email) 
    { 
        boolean tag = true; 
        final String pattern1 = "^([a-z0-9A-Z]+[-|//.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?//.)+[a-zA-Z]{2,}$"; 
        final Pattern pattern = Pattern.compile(pattern1); 
        final Matcher mat = pattern.matcher(email); 
        if (!mat.find()) { 
            tag = false; 
        } 
        return tag; 
    } 
}

正则表达式啊
String reg = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";

String email = "sxhsfasdfz@163.com";
boolean isValidaEmail = email.matches(reg);

System.out.println(email.matches(reg));

String reg = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";

String email = "sxhsfasdfz@163.com";
boolean isValidaEmail = email.matches(reg);

System.out.println(email.matches(reg));

String checkPattern = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
Pattern regex = Pattern.compile(checkPattern);
Matcher matcher = regex.matcher(email);

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