import os

def add_prefix_to_filenames(directory, prefix):
    # 获取目录中的所有文件名
    for filename in os.listdir(directory):
        # 构建旧文件路径
        old_file_path = os.path.join(directory, filename)
        
        # 检查是否是文件
        if os.path.isfile(old_file_path):
            # 构建新文件名
            new_filename = prefix + filename
            
            # 构建新文件路径
            new_file_path = os.path.join(directory, new_filename)
            
            # 重命名文件
            os.rename(old_file_path, new_file_path)
            print(f"Renamed: {old_file_path} -> {new_file_path}")

# 使用示例
directory_path = 'path/to/your/directory'  # 替换为你的目录路径
prefix_to_add = 'prefix_'  # 替换为你要添加的前缀
add_prefix_to_filenames(directory_path, prefix_to_add)