架构师训练营 - 第十一周作业

public class Demo{
  
  private static final Encryptor encryptor = new MD5Encryptor();
  
  public static void main(String[] args){
  
   
  	check(1,"123456","e10adc3949ba59abbe56e057f20f883e");
  }
  
  public static boolean checkPW(int id,String srcPassword,String ePassword){
    
    if(srcPassword == null || srcPassword.trim().length() == 0){
    	return false;
    }
 
    
    if(ePassword == null || ePassword.trim().length() == 0){
    		return false;
    }
    
    
    return ePassword.equals(encryptor.encryption(srcPassword));
  }
}
public class EncryptionException extends RuntimeException{
	
  public EncryptionException(String msg){
  
    super(msg);
  }
}
public interface Encryptor{
  public String encryption(String src);
}
public class MD5Encryptor implements Encryptor{
  public String encryption(String src){
  	String des = "";
      try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] result = md.digest(source.getBytes());
        StringBuilder buf = new StringBuilder();
        for (int i=0;i<result.length;i++) {
          byte b = result[i];
          buf.append(String.format("%02X", b));
        }
        des = buf.toString().toLowerCase();
      } catch (Exception e) {
        e.printStackTrace();
        throw new EncryptionException("md5 failure");
      }
      return des;
  }
}