java之Pattern.compile相关正则表达式

import java.util.regex.Matcher;//jar包
import java.util.regex.Pattern;//jar包
public static boolean checkEmail(String email) 
{  
    boolean flag = false;  
    try
　　{  
        String check = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";  
        Pattern regex = Pattern.compile(check);  
        Matcher matcher = regex.matcher(email);  
        flag = matcher.matches();  
        } catch (Exception e) {  
            flag = false;  
        }  
        return flag;  
    }
}