模板引擎

            Person person = new Person();
            person.Name = "yzk";
            person.Age = 30;

            Dictionary<string, string> dict = new Dictionary<string, string>();
            dict["tom"] = "斯坦福";
            dict["jim"] = "加里敦";
            dict["yzk"] = "哈佛";

            VelocityEngine vltEngine = new VelocityEngine();
            vltEngine.SetProperty(RuntimeConstants.RESOURCE_LOADER, "file");
            vltEngine.SetProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, System.Web.Hosting.HostingEnvironment.MapPath("~/templates"));//模板文件所在的文件夹
            vltEngine.Init();

            VelocityContext vltContext = new VelocityContext();
            vltContext.Put("p", person);//设置参数，在模板中可以通过$data来引用
　　　　　　　vltContext.Put("p", dict);//设置参数，在模板中可以通过$data来引用
            Template vltTemplate = vltEngine.GetTemplate("test.htm");
            System.IO.StringWriter vltWriter = new System.IO.StringWriter();
            vltTemplate.Merge(vltContext, vltWriter);

            string html = vltWriter.GetStringBuilder().ToString();
            context.Response.Write(html);