Velocity

package com.g3net.templeteEngine;

import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.log4j.Logger;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;

import com.book.bussiness.TempleteData;
import com.book.domain.Book;

/**
 * 模版处理器，用于拼装页面以及数据
 * 
 *
 */
public class TempleteProcesser {
	private static Logger log = Logger.getLogger(TempleteProcesser.class);
	/**
	 * 
	 * @param tname	经过处理的模板名，保证在不同平台分辨率下的唯一性。当这个参数没有的时候，采用动态模板进行操作
	 * @param realTname  真实的模板名，未经过处理
	 * @param tcontent
	 * @param vars
	 * @return
	 */
	public static String process(TempleteData td,String tcontent,Map<String,Object> vars){
		/**
		 * 初始化上下文环境
		 */
		VelocityContext context = new VelocityContext();
		if(vars!=null)
		{
			Iterator<String> keys=vars.keySet().iterator();
			while (keys.hasNext()) {
				String key = (String) keys.next();
				context.put(key, vars.get(key));
			}
		}
		StringWriter w = new StringWriter();
		if(td!=null)
		{
			Velocity.mergeTemplate(td.wholeTname(), "utf-8", context, w );
		}else{//调用动态模板
			try
	        {
	            Velocity.evaluate( context, w, "dynamic", tcontent );
	        }
	        catch( Exception pee )
	        {
	        	log.error("", pee);
	        }
		}
		return w.toString();
	}
	
	
		
	
	
}







package com.book.bussiness;

import java.io.Serializable;

import com.g3net.tool.StringUtils;

/**
 * 业务功能模板相关的数据
 * 
 *
 */
public class TempleteData implements Serializable{
	
	
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private int id;//模板id
	private int cver;//模板内容的版本号，从1开始递增编号
	private int funid;
	private int pver;
	private int cs;
	private int platformid;
	public int getPlatformid() {
		return platformid;
	}

	public void setPlatformid(int platformid) {
		this.platformid = platformid;
	}

	private String tname;
	private String tcontent;
	private String classname;
	private String funname;
	private String modifytime;
	private int isspecial;
	
	
	public int getIsspecial() {
		return isspecial;
	}

	public void setIsspecial(int isspecial) {
		this.isspecial = isspecial;
	}

	public int getFunid() {
		return funid;
	}

	public void setFunid(int funid) {
		this.funid = funid;
	}

	public int getPver() {
		return pver;
	}

	public void setPver(int pver) {
		this.pver = pver;
	}

	public int getCs() {
		return cs;
	}

	public void setCs(int cs) {
		this.cs = cs;
	}

	/**
	 * 为了保证模板名的全局唯一性，需要添加样式、协议版本等信息
	 * @return
	 */
	public String getTname() {
		return tname;
	}

	/**
	 * 返回完整版的模板名
	 * @return
	 */
	public String wholeTname(){
		StringBuilder sb=new StringBuilder();
		sb.append(platformid);sb.append("_");
		sb.append(cs);sb.append("_");
		sb.append(pver);sb.append("_");
		sb.append(funid);
		if(StringUtils.hasText(tname))
		{
			sb.append("_");
			sb.append(tname);
		}
		return sb.toString();
	
	}
	public void setTname(String tname) {
		this.tname = tname;
	}

	public String getTcontent() {
		return tcontent;
	}

	public void setTcontent(String tcontent) {
		this.tcontent = tcontent;
	}

	public String getClassname() {
		return classname;
	}

	public void setClassname(String classname) {
		this.classname = classname;
	}

	public String getFunname() {
		return funname;
	}

	public void setFunname(String funname) {
		this.funname = funname;
	}

	public String getModifytime() {
		return modifytime;
	}

	public void setModifytime(String modifytime) {
		this.modifytime = modifytime;
	}
	
	public int getId() {
		return id;
	}
	
	public void setId(int id) {
		this.id = id;
	}
	
	public int getCver() {
		return cver;
	}
	
	public void setCver(int cver) {
		this.cver = cver;
	}

	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return "[funid="+funid+" pver="+pver+" cs="+cs+" tname="+tname+" tcontent="+tcontent+" classname="+classname
		+" funname="+funname+" modifytime="+modifytime+" ]";
	}
}