import com.thoughtworks.paranamer.AnnotationParanamer; //导入依赖的package包/类
public CodeGeneratorMethod(Method m) {
    this.underlyingMethod = m;
    this.methodName = m.getName();
    this.returnType = m.getReturnType();
//    Paranamer para = new BytecodeReadingParanamer();
    Paranamer para = new AnnotationParanamer();
    String[] parameterNames = para.lookupParameterNames(m, true);
    if (parameterNames == null) {
      throw new RuntimeException(String.format("Unable to read the parameter names for method %s.  This is likely due to the class files not including the appropriate debugging information.  Look up java -g for more information.", m));
    }
    Class<?>[] types = m.getParameterTypes();
    if (parameterNames.length != types.length) {
      throw new RuntimeException(String.format("Unexpected number of parameter names %s.  Expected %s on method %s.", Arrays.toString(parameterNames), Arrays.toString(types), m.toGenericString()));
    }
    arguments = new CodeGeneratorArgument[parameterNames.length];
    for (int i = 0 ; i < parameterNames.length; i++) {
      arguments[i] = new CodeGeneratorArgument(parameterNames[i], types[i]);
    }
    exs = m.getExceptionTypes();
  }