NVelocity 操作类VelocityHelper
原文连接：http://my.oschina.net/yangzhi/blog/6770
代码
using
System;
using
System.Web;
using
System.IO;
using
NVelocity;
using
NVelocity.App;
using
NVelocity.Context;
using
NVelocity.Runtime;
using
Commons.Collections;
using
System.Text;
namespace
FoodunTemplateAction
{
///
<summary>
///
NVelocity模板工具类 VelocityHelper
///
</summary>
public
class
VelocityHelper
{
private
VelocityEngine velocity
=
null
;
private
IContext context
=
null
;
///
<summary>
///
构造函数
///
</summary>
///
<param name="templatDir">
模板文件夹路径
</param>
public
VelocityHelper(
string
templatDir)
{
Init(templatDir);
}
///
<summary>
///
无参数构造函数
///
</summary>
public
VelocityHelper() { }
///
<summary>
///
初始话NVelocity模块
///
</summary>
public
void
Init(
string
templatDir)
{
//
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(templatDir));
//
props.AddProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, Path.GetDirectoryName(HttpContext.Current.Request.PhysicalPath));
props.AddProperty(RuntimeConstants.INPUT_ENCODING,
"
utf-8
"
);
props.AddProperty(RuntimeConstants.OUTPUT_ENCODING,
"
utf-8
"
);
//
模板的缓存设置
props.AddProperty(RuntimeConstants.FILE_RESOURCE_LOADER_CACHE,
true
);
//
是否缓存
props.AddProperty(
"
file.resource.loader.modificationCheckInterval
"
, (Int64)
30
);
//
缓存时间(秒)
velocity.Init(props);
//
为模板变量赋值
context
=
new
VelocityContext();
}
///
<summary>
///
给模板变量赋值
///
</summary>
///
<param name="key">
模板变量
</param>
///
<param name="value">
模板变量值
</param>
public
void
Put(
string
key,
object
value)
{
if
(context
==
null
)
context
=
new
VelocityContext();
context.Put(key, value);
}
///
<summary>
///
显示模板
///
</summary>
///
<param name="templatFileName">
模板文件名
</param>
public
void
Display(
string
templatFileName)
{
//
从文件中读取模板
Template template
=
velocity.GetTemplate(templatFileName);
//
合并模板
StringWriter writer
=
new
StringWriter();
template.Merge(context, writer);
//
输出
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.Write(writer.ToString());
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.End();
}
///
<summary>
///
根据模板生成静态页面
///
</summary>
///
<param name="templatFileName"></param>
///
<param name="htmlpath"></param>
public
void
CreateHtml(
string
templatFileName,
string
htmlpath)
{
//
从文件中读取模板
Template template
=
velocity.GetTemplate(templatFileName);
//
合并模板
StringWriter writer
=
new
StringWriter();
template.Merge(context, writer);
using
(StreamWriter write2
=
new
StreamWriter(HttpContext.Current.Server.MapPath(htmlpath),
false
, Encoding.UTF8,
200
))
{
write2.Write(writer);
write2.Flush();
write2.Close();
}
}
///
<summary>
///
根据模板生成静态页面
///
</summary>
///
<param name="templatFileName"></param>
///
<param name="htmlpath"></param>
public
void
CreateJS(
string
templatFileName,
string
htmlpath)
{
//
从文件中读取模板
Template template
=
velocity.GetTemplate(templatFileName);
//
合并模板
StringWriter writer
=
new
StringWriter();
template.Merge(context, writer);
using
(StreamWriter write2
=
new
StreamWriter(HttpContext.Current.Server.MapPath(htmlpath),
false
, Encoding.UTF8,
200
))
{
write2.Write(YZControl.Strings.Html2Js(YZControl.Strings.ZipHtml(writer.ToString())));
write2.Flush();
write2.Close();
}
}
}
}
调用如下：
VelocityHelper vh
=
new
VelocityHelper();
///
<summary>
///
显示页面
///
</summary>
public
void
ShowInfo()
{
vh.Init(
"
~/template/default
"
);
//
模板路径
PublicTemplate.GetHead(
ref
vh);
vh.Put(
"
menu
"
,
1
);
vh.Put(
"
minDate
"
,DateTime.Now.ToShortDateString());
vh.Put(
"
maxDate
"
, DateTime.Now.AddMonths(
3
).ToShortDateString());
if
(CRequest.IsPost())
//
判断是什么请求
{
vh.Put(
"
post
"
,
true
);
TJ();
}
else
{
vh.Put(
"
post
"
,
false
);
}
GetDCStore();
vh.Display(
"
dc.html
"
);
}