资源管理，文件复制，生成MD5

【核心代码】

using UnityEngine;
using UnityEditor;
using System.Collections;
using System.IO;
using System.Reflection;
using System.Text;
public class CopyScriptBySjz : MonoBehaviour {

    [@MenuItem("Copy/CopyToPath")]
    static void CopyToPath()
    {
        Object[] mSelections = Selection.GetFiltered(typeof(Object), SelectionMode.DeepAssets);//选择你要复制的文件夹
        string[] path=AssetDatabase.GetAssetPath(mSelections[0]).ToString().Split('/');
        string sourPath = Application.dataPath   "/"   path[1];// AssetDatabase.GetAssetPath(mSelections[0]);  //获取到要复制文件的绝对路径
        string specPath = EditorUtility.SaveFolderPanel("", "", "");//选择你要保存的文件夹路径

        CopyDirectory(sourPath, specPath);
       
    }

    private static void CopyDirectory(string sourPath, string specPath)
    {
        #region   第一种
        //if (specPath[specPath.Length - 1] != Path.DirectorySeparatorChar)
        //{
        //    specPath  = Path.DirectorySeparatorChar;
        //}

        //if (!Directory.Exists(specPath))
        //{
        //    Directory.CreateDirectory(specPath);
        //}

        //if (!Directory.Exists(sourPath))
        //{
        //    return;
        //}

        //string[] fileList = Directory.GetFileSystemEntries(sourPath);

        //foreach (string file in fileList)
        //{
        //    if (Directory.Exists(file))
        //        CopyDirectory(file, specPath   Path.GetFileName(file));
        //    else
        //    {
        //        try
        //        {
        //            File.Copy(file, specPath   Path.GetFileName(file), true);
        //        }
        //        catch (System.Exception e)
        //        {
        //            Debug.Log("复制失败！");

        //            continue;
        //        }
        //    }
        //}
        #endregion
        #region 第二种
        string folderName = sourPath.Substring(sourPath.LastIndexOf("\\")   1);

        string[] filenames = Directory.GetFileSystemEntries(sourPath);

		foreach (string file in filenames)// 遍历所有的文件和目录
        {

            if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
            {

                string currentdir = specPath   "\\"   file.Substring(file.LastIndexOf("\\")   1);
                if (!Directory.Exists(currentdir))
                {
                    Directory.CreateDirectory(currentdir);
                }
				/************写入MD5值************/
				string Md5Name=file.Substring(file.LastIndexOf("\\")   1);
				string Md51 = Md5Name "||" Md5Sum(file);
				CreatMd5Text(currentdir, "Md5.txt", Md51);

				/**********复制文件********/
                CopyDirectory(file, currentdir);

            }

            else // 否则直接copy文件
            {
				/**************获得文件类型***************/
				string fileName=file.Substring(file.LastIndexOf("\\"));
				string fileType=fileName.Substring(fileName.LastIndexOf("."));;

				/***************获得文件名***************/
                string srcfileName = file.Substring(file.LastIndexOf("\\")   1);
                srcfileName = specPath   "/"   srcfileName;


                if (!Directory.Exists(specPath))
                {
                    Directory.CreateDirectory(specPath);
                }

				if(fileType!=".meta")    //判断文件类型
				{
               	 	File.Copy(file, srcfileName);   //复制文件
					/************写入MD5值************/
					string Md5Name=file.Substring(file.LastIndexOf("\\")   1);
					string Md52 = Md5Name "||" Md5Sum(file);
					CreatMd5Text(specPath, "Md5.txt", Md52);
				}

            }
        }
        #endregion
    }

    /// <summary>
    /// 生成MD5方法
    /// </summary>
    /// <param name="flie">为哪个文件生成MD5</param>
    /// <returns></returns>
    public static string Md5Sum(string flie)
    {
        System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create();
        byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(flie); 
        byte[] hash = md5.ComputeHash(inputBytes); 
        StringBuilder strBuilder = new StringBuilder(); 
        for (int i = 0; i < hash.Length; i  ) 
        {
            strBuilder.Append(hash[i].ToString("X2")); 
        }
        return strBuilder.ToString();
    }


    /// <summary>
    /// 生成文本，写入MD5值
    /// </summary>
    /// <param name="file_path">文本存在路径</param>
    /// <param name="file_name">文本名称</param>
    /// <param name="str_info">文本内容</param>
    private static void CreatMd5Text(string file_path, string file_name, string str_info)
    {
        StreamWriter sw;
        if (!File.Exists(file_path   "//"   file_name))
        {
            sw = File.CreateText(file_path   "//"   file_name);//创建一个用于写入 UTF-8 编码的文本
            Debug.Log("文件创建成功！");
        }
        else
        {
            sw = File.AppendText(file_path   "//"   file_name);//打开现有 UTF-8 编码文本文件以进行读取
        }
        sw.WriteLine(str_info);//以行为单位写入字符串
        sw.Close();
        sw.Dispose();//文件流释放
    }
}