Spring StandardReflectionParameterNameDiscoverer

@Override
@Nullable
public String[] getParameterNames(Method method) {
   // 获取参数名称
   return getParameterNames(method.getParameters());
}

@Override
@Nullable
public String[] getParameterNames(Constructor<?> ctor) {
   // 获取参数名称
   return getParameterNames(ctor.getParameters());
}

@Nullable
private String[] getParameterNames(Parameter[] parameters) {
   String[] parameterNames = new String[parameters.length];
   for (int i = 0; i < parameters.length; i++) {
      Parameter param = parameters[i];
      if (!param.isNamePresent()) {
         return null;
      }
      parameterNames[i] = param.getName();
   }
   return parameterNames;
}