java 检查email的正则表达式

 public boolean checkEmail(String mail){  
     String regex = "\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*";       
     Pattern   p   =   Pattern.compile(regex);  
     Matcher   m   =   p.matcher(mail);  
     return m.find();  
 }