nvelocity封装类凑合着用 YI

以前写java的时候就velocity ，人家问偶struts的时候嘿嘿，只知道eclipse是可以配置的，其他木然
最近被迫写c#，也顺手找到了下，发现nvelocity 估计以后人家问偶webui的时候也只有继续木然了。

借鉴前人的，改了下。
测试下来速度还是可以的

目标

基础接口，写php弄smarty留下来遗产，java在用，c#也就继续下去吧。

    public abstract class TemplateBase : ITemplateParse
    {
        private string _templateDir;
        private string _configDir;
        private string _cacheDir;
        private bool _caching;
        private bool _debugging;
        public abstract void Assign(string key, object value);
        public bool IsCached(string templateFileName, string catchId, string compareId)
        {
            throw new System.NotImplementedException();
        }

        public virtual void Display(string templateFileName)
        {
            throw new System.NotImplementedException();
        }

        public virtual string TemplateDir
        {
            get { return _templateDir; }
            set { _templateDir = value; }
        }

        public virtual string ConfigDir
        {
            get { return _configDir; }
            set { _configDir = value; }
        }

        public virtual string CacheDir
        {
            get { return _cacheDir; }
            set { _cacheDir = value; }
        }

        public virtual bool Caching
        {
            get { return _caching; }
            set { _caching = value; }
        }

        public virtual bool Debugging
        {
            get { return _debugging; }
            set { _debugging = value; }
        }
    }
}

//没有把缓存的贴出来，写着写忘记了从新建了class。娃哈哈。

    public class VelocityHelper : TemplateBase
    {
        private VelocityEngine velocity;
        private IContext context = new VelocityContext();


        /// <summary>
        /// 给模板变量赋值
        /// </summary>
        /// <param name="key">
        /// 变量名称
        /// </param>
        public override void Assign(string key, object value)
        {
            if (context == null)
                context = new VelocityContext();
            context.Put(key, value);
        }
        /// <summary>
        ///  显示模板
        /// </summary>
        /// <param name="templateFileName"></param>
        public override void Display(string templateFileName)
        {
            //TODO  检查目录是否初始化过
            if (TemplateDir == null)
                TemplateDir = "";//


            //创建VelocityEngine实例对象
            velocity = new VelocityEngine();

            //使用设置初始化VelocityEngine
            ExtendedProperties props = new ExtendedProperties();
            props.AddProperty(RuntimeConstants.RESOURCE_LOADER, "file");
            props.AddProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, HttpContext.Current.Server.MapPath(TemplateDir));
            //props.AddProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, TemplateDir);


            props.AddProperty(RuntimeConstants.INPUT_ENCODING, "utf-8");
            props.AddProperty(RuntimeConstants.OUTPUT_ENCODING, "utf-8");
            velocity.Init(props);

            //从文件中读取模板
            var template = velocity.GetTemplate(templateFileName);

            //合并模板
            StringWriter writer = new StringWriter();
            template.Merge(context, writer);
            writer.Close();

            //输出我页面
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.Write(writer.ToString());
            HttpContext.Current.Response.Flush();
            HttpContext.Current.Response.End();



        }
    }
 }

下面是生成静态页面的东东，估计是上面那个是吃中午饭前完成的。下面是吃完饭回来写，哎，人老了。

接口：

   public interface IHtmlCacher
    {
        /**//// <summary>
        /// 添加一个解析器
        /// </summary>
        /// <param name="key"></param>
        /// <param name="resolver"></param>
        void AddAResolver(string key, BaseHtmlCacheResolver resolver);

        /**//// <summary>
        /// 创建一个html页面
        /// </summary>
        /// <param name="templatePath">模板路径</param>
        /// <param name="templateFileName">模板名称</param>
        /// <param name="outDir">输出路径</param>
        /// <param name="outFileName">输出名称</param>
        /// <returns></returns>
        int CreateCacheFile(string templatePath, string templateFileName, string outDir, string outFileName,CacherInfo cacherInfo);

        /**//// <summary>
        /// 预览htmlfile
        /// </summary>
        /// <param name="TemplateDir"></param>
        /// <param name="templateFileName"></param>
        /// <param name="cacherInfo"></param>
        void PreviewCacheFile(string TemplateDir, string templateFileName, CacherInfo cacherInfo);
    }

不知道怎么发晕了，又从新写了nvelocity 解析的类

    public class NVelocityCacher:IHtmlCacher
    {
        private VelocityEngine velocity;
        private IContext context = new VelocityContext();
        private System.Collections.Hashtable resolverMap = new Hashtable();


        public NVelocityCacher()
        {
            if (context==null)
            {
                context = new VelocityContext();
            }
        }
        /// <summary>
        ///  加载不同页面解析器
        /// </summary>
        /// <param name="key"></param>
        /// <param name="resolver"></param>
        public void AddAResolver(string key,BaseHtmlCacheResolver resolver)
        {
            resolverMap.Add(key,resolver);
        }

        /// <summary>
        /// 创建缓存文件
        /// </summary>
        /// <param name="templatePath"></param>
        /// <param name="templateFileName"></param>
        /// <param name="outDir"></param>
        /// <param name="outFileName"></param>
        /// <param name="cacherInfo"></param>
        /// <returns></returns>
        public int CreateCacheFile(string templatePath, string templateFileName,string outDir,string outFileName,CacherInfo cacherInfo)
        {                      
            //创建VelocityEngine实例对象
            velocity = new VelocityEngine();

            //使用设置初始化VelocityEngine
            ExtendedProperties props = new ExtendedProperties();
            props.AddProperty(RuntimeConstants.RESOURCE_LOADER, "file");
            props.AddProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, templatePath);
            //props.AddProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, TemplateDir);


            props.AddProperty(RuntimeConstants.INPUT_ENCODING, "utf-8");
            props.AddProperty(RuntimeConstants.OUTPUT_ENCODING, "utf-8");
            velocity.Init(props);

            //从文件中读取模板
            var template = velocity.GetTemplate(templateFileName);


            //遍历解析器
            foreach (System.Collections.DictionaryEntry ob in resolverMap)
            {
                context.Put(ob.Key.ToString(),ob.Value);
            }
            context.Put("SysPage", cacherInfo);//TODO 把页面公用信息，和本身标示放进去
            //合并模板
            StringWriter writer = new StringWriter();
            template.Merge(context, writer);

            //生成静态页
            string cacheDir = outDir + "/" + outFileName;//TODO 这里有问题需要修改
            using (StreamWriter writer2 = new StreamWriter(cacheDir,false,Encoding.UTF8,200))
            {
                writer2.Write(writer); 
                writer2.Flush();
                writer2.Close();
            }           
            return 0;
        }

        /// <summary>
        ///  显示模板
        /// </summary>
        /// <param name="TemplateDir"></param>
        /// <param name="templateFileName"></param>
        /// <param name="cacherInfo"></param>
        public void PreviewCacheFile(string TemplateDir, string templateFileName,CacherInfo cacherInfo)
        {
            //TODO  检查目录是否初始化过
            if (TemplateDir.IndexOf("~") == 0)
                TemplateDir = HttpContext.Current.Server.MapPath(TemplateDir);

            if (!System.IO.Directory.Exists(TemplateDir))
            {
                string er = "模板路径不存在！！ path=" + TemplateDir;
                throw new Exception(er);
            }
            if (!System.IO.File.Exists(TemplateDir + "/"+templateFileName))
            {
                string er = "模板不存在！！ path=" + TemplateDir + "/" + templateFileName;
                throw new Exception(er);
            }

            //创建VelocityEngine实例对象
            velocity = new VelocityEngine();

            //使用设置初始化VelocityEngine
            ExtendedProperties props = new ExtendedProperties();
            props.AddProperty(RuntimeConstants.RESOURCE_LOADER, "file");
            props.AddProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, TemplateDir);
            //props.AddProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, TemplateDir);


            props.AddProperty(RuntimeConstants.INPUT_ENCODING, "utf-8");
            props.AddProperty(RuntimeConstants.OUTPUT_ENCODING, "utf-8");
            velocity.Init(props);

            //从文件中读取模板
            var template = velocity.GetTemplate(templateFileName);


            //遍历解析器
            foreach (System.Collections.DictionaryEntry ob in resolverMap)
            {
                context.Put(ob.Key.ToString(), ob.Value);
            }
            context.Put("SysPage", cacherInfo);
            //合并模板
            StringWriter writer = new StringWriter();
            template.Merge(context, writer);



            //输出我页面
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.Write(writer.ToString());
            HttpContext.Current.Response.Flush();
            HttpContext.Current.Response.End();
        }
    }

使用的方法：

    public class HtmlMaker
    {
        #region 私有变量

        private IHtmlCacher _htmlCather;
        #endregion

        #region 实现现成安全的singleton
        private HtmlMaker()
        {
            this.InitHtmlMaker();
        }

        public static HtmlMaker Instance
        {
            get
            {
                return Singleton.htmlMaker;
            }

        }

        private class Singleton
        {
            static Singleton()
            {

            }
            internal static readonly HtmlMaker htmlMaker =
              new HtmlMaker();
        }
        #endregion




        #region 基本方法
        private void InitHtmlMaker()
        {
            _htmlCather = new NVelocityCacher();
            /*  把你想要加载的东西放这里 
              //TODO 以后改成读配置文件，检查名称唯一性
            var catalogResolver = new CatalogListCacheResolver();
            _htmlCather.AddAResolver("catalog", catalogResolver);
             */


        }
        #endregion

        public void UpdateCache(string tplPath,string tplName,string outPath,string outName,CacherInfo cacherInfo)
        {
            _htmlCather.CreateCacheFile(tplPath, tplName, outPath, outName, cacherInfo);
        }

        public void PreviewCacheFile(string tplpath,string tplName,CacherInfo cacherInfo)
        {
            _htmlCather.PreviewCacheFile(tplpath, tplName, cacherInfo);
        }

        public void PreviewCacheFile(string fileFullPath, CacherInfo cacherInfo)
        {
            if(fileFullPath.IndexOf("~")==0)
                fileFullPath = HttpContext.Current.Server.MapPath(fileFullPath);

            if (!System.IO.File.Exists(fileFullPath))
            {  
                string er = "模板路径不存在！！ path=" + fileFullPath;
                throw new Exception(er);
            }
            string tplPath = System.IO.Path.GetDirectoryName(fileFullPath);
            string tplName = fileFullPath.Replace(tplPath, "");

            _htmlCather.PreviewCacheFile(tplPath, tplName, cacherInfo);
        }

        public void CreateCacheFile(string fileFullPath, string outFullPath, CacherInfo cacherInfo)
        {
            //*1*模板处理
            if (fileFullPath.IndexOf("~") == 0)
                fileFullPath = HttpContext.Current.Server.MapPath(fileFullPath);

            if (!System.IO.File.Exists(fileFullPath))
            {
                string er = "模板路径不存在！！ path=" + fileFullPath;
                throw new Exception(er);
            }
            string tplPath = System.IO.Path.GetDirectoryName(fileFullPath);
            string tplName = System.IO.Path.GetFileName(fileFullPath);

            //*2*输出
            if (outFullPath.IndexOf("~") == 0)
                outFullPath = HttpContext.Current.Server.MapPath(outFullPath);

  
            string outPath = System.IO.Path.GetDirectoryName(outFullPath);
            string outName = System.IO.Path.GetFileName(outFullPath);

            if (!System.IO.Directory.Exists(outPath))
            {
                try
                {
                    System.IO.Directory.CreateDirectory(outPath);
                }
                catch
                {
                    string er = "无法创建缓存目录！！ path=" + outPath;
                    throw new Exception(er);
                }
            }

            _htmlCather.CreateCacheFile(tplPath, tplName, outPath, outName, cacherInfo);
        }

        public void CreateCacheFile(string fileFullPath,string outPath,string outName,CacherInfo cacherInfo)
        {
            //*1*模板处理
            if (fileFullPath.IndexOf("~") == 0)
                fileFullPath = HttpContext.Current.Server.MapPath(fileFullPath);

            if (!System.IO.File.Exists(fileFullPath))
            {
                string er = "模板路径不存在！！ path=" + fileFullPath;
                throw new Exception(er);
            }
            string tplPath = System.IO.Path.GetDirectoryName(fileFullPath);
            string tplName = fileFullPath.Replace(tplPath, "");
            
            //*2*输出处理
            if(outPath.IndexOf("~")==0)
            {
                outPath = HttpContext.Current.Server.MapPath(outPath);
            }
            if(!System.IO.Directory.Exists(outPath))
            {
                System.IO.Directory.CreateDirectory(outPath);
            }

            _htmlCather.CreateCacheFile(tplPath, tplName, outPath, outName,cacherInfo); 
        }
    }

2个补充类，一个示例类，一个模板。

//有解析器需要集成他，为啥用抽象类忘记了。。
public abstract class BaseHtmlCacheResolver
    {
        private readonly Service.IServiceFactory _serviceFactory =   My.Service.Imp.ServiceFactory.Instance;//把Service factory加载起来大家用

        protected LDCMS.Core.Service.IServiceFactory ServiceFatory
        {
            get
            {      
                return _serviceFactory;
            }
        }
    }

//用于存储全局使用的变量
 public class CacherInfo
    {
//随便放点你需要放置的全局要用的东西
}

//一个实现类
  public class CatalogListCacheResolver:BaseHtmlCacheResolver
    {

        private LDCMS.Core.Service.ICatalogService _catalogService;

        public CatalogListCacheResolver()
        {
            _catalogService = ServiceFatory.getCatalogManager();
        }


        //示例

         public Catalog GetCatalog(int id)
        {
             return _catalogService.GetById(id);
        }
}


//html.vm
#set($entity = $catalog.GetCatalog(1))
栏目名称：$entity.Name</b>
栏目位置:$entity.Link</b>

先用着吧。

不过nvelocity 全局宏还是不知道怎么加载。头痛中

 nvelcotiy 用的是castle的。他的关于宏的包还木弄明白。

至于spring 这个东西哎。。spring.net 还木弄明白的，所以spring+velocity+hibernate这个东西可能不太可能翻译成
spring.net+nvelocity+nhibernate了。不过junit log4j 变成nunit,log4net 还在继续发挥他们功能。
有空再把他们2个抓来show下。