java开发中经常用到的代码

				/**
				  * 判断是不是合法手机
				  * handset 手机号码
				  */
				 public static boolean isHandset(String handset) {
				  try {
				   if(!handset.substring(0,1).equals("1")) {
				    return false;
				   }
				   if (handset==null || handset.length()!=11) {
				    return false;
				   }
				   String check = "^[0123456789]+$";
				   Pattern regex = Pattern.compile(check);
				   Matcher matcher = regex.matcher(handset);
				   boolean isMatched = matcher.matches();
				   if(isMatched) {
				    return true;
				   } else {
				    return false;
				   }
				  } catch (RuntimeException e) {
				   return false;
				  } 
				 }
				}