java小知识点

//手机验证，已经测试过

public  static boolean isChinaPhoneLegal(String str) throws PatternSyntaxException {  
        String regExp = "^((13[0-9])|(15[^4])|(18[0-9])|(17[0-8])|(147))\\d{8}$";  
        Pattern p = Pattern.compile(regExp);  
        Matcher m = p.matcher(str);  
        return m.matches();  

   }  

密码加密

public class MD5{
    @SuppressWarnings("restriction")
public static String md5(String str) {
        String s=str;
if(s==null){
return "";
}else{
String value = null;
MessageDigest md5 = null;
try {
md5 = MessageDigest.getInstance("MD5");
}catch (NoSuchAlgorithmException ex) {
Logger.getLogger(MD5.class.getName()).log(Level.SEVERE, null, ex);
}
sun.misc.BASE64Encoder baseEncoder = new sun.misc.BASE64Encoder();
try {
value = baseEncoder.encode(md5.digest(s.getBytes("utf-8")));
} catch (Exception ex) {
}
return value;
}
}  
}