velocity

package com.g3net.templeteEngine;

import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.Logger;
import org.apache.velocity.Template;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.runtime.resource.loader.StringResourceLoader;
import org.apache.velocity.runtime.resource.util.StringResource;
import org.apache.velocity.runtime.resource.util.StringResourceRepository;

import com.g3net.tool.StringUtils;

/**
 * 页面模板管理器,只管理string来源的模板
 * 
 *
 */
public class TempleteManager {
	private static StringResourceRepository repo = null;
	private static Logger log = Logger.getLogger(TempleteManager.class);
	private static List<String> tnames=new ArrayList<String>();
	static{
		//加载类时初始化模版引擎
		Velocity.init(TempleteManager.class.getResource("/").getPath()+"/velocity.properties");
		repo = StringResourceLoader.getRepository();
		repo.setEncoding("utf-8");
	}
	
	
	public static Template getTemplete(){
		return null;
	}
	/**
	 * 将String转化为模板对象
	 * @param name
	 * @param content
	 */
	public static void addTemplete(String name,String content){
		if(!StringUtils.hasText(name)||!StringUtils.hasText(content))
		{
			log.debug("输入数据内容为空 name="+name+" content="+content);
			return ;
		}
		if(tnames.size()>10000)//超过一定数量的页面时，就不在增加，巨大数量的页面很有可能程序中存在bug
		{
			log.debug("出现异常了。当前模块数量 size="+tnames.size());
			return ;
		}
		StringResource temp=repo.getStringResource(name);
		if(temp!=null)
		{
			temp.setBody(content);
			temp.setLastModified(System.currentTimeMillis());
		}else{
			repo.putStringResource(name, content);
			tnames.add(name);
		}
	}
	/**
	 * 删除模板
	 * @param name
	 */
	public static void delTemplete(String name){
		tnames.remove(name);
		repo.removeStringResource(name);
	}
	/**
	 * 删除所有模板
	 * @param name
	 * @param content
	 * @return
	 */
	public static void delAll(String name,String content){
		for (int i = 0; i < tnames.size(); i++) {
			repo.removeStringResource(tnames.get(i));
		}
		tnames.clear();
	}
}






# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.    
#
# specify three resource loaders to use
#
resource.loader =  class , string

#
# for the loader we call 'file', set the FileResourceLoader as the
# class to use, turn off caching, and use 3 directories for templates
#
#file.resource.loader.description = Velocity File Resource Loader
#file.resource.loader.class = org.apache.velocity.runtime.resource.loader.FileResourceLoader
#file.resource.loader.path = templatedirectory1, anotherdirectory, foo/bar
#file.resource.loader.cache = false
#file.resource.loader.modificationCheckInterval = 0

#
#  for the loader we call 'class', use the ClasspathResourceLoader
#
class.resource.loader.description = Velocity Classpath Resource Loader
class.resource.loader.class = org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader

#
# and finally, for the loader we call 'jar', use the JarResourceLoader
# and specify two jars to load from
#
#jar.resource.loader.description = Velocity Jar  Resource Loader
#jar.resource.loader.class = org.apache.velocity.runtime.resource.loader.JarResourceLoader
#jar.resource.loader.path = jar:file:/myjarplace/myjar.jar, jar:file:/myjarplace/myjar2.jar


resource.loader = string
string.resource.loader.description = Velocity StringResource loader
string.resource.loader.class = org.apache.velocity.runtime.resource.loader.StringResourceLoader
string.resource.loader.repository.class = org.apache.velocity.runtime.resource.util.StringResourceRepositoryImpl