mainhead.java

一个不错的bbs论坛系统．对初学者很有帮助

package com.yhbbs.comm.tag;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.log4j.Logger;

import com.yhbbs.article.biz.ArticleBiz;
import com.yhbbs.forum.biz.ForumBiz;
import com.yhbbs.user.online.Postion;
import com.yhbbs.utils.ReqUtils;
import com.yhbbs.yhclass.biz.ClassBiz;
/**
 * <p>Title: 论坛导航标签</p>
 * <p>Company: www.yyhweb.com</p>
 * <br><b>CopyRight: yyhweb[由由华网]</b>
 * @author stephen
 * @version YHBBS-2.0
 */
public class MainHead extends TagSupport{
	
	private static final long serialVersionUID = 1L;
	
	private static Logger bbslog = Logger.getLogger(MainHead.class);
	
	public int doStartTag() throws JspException {
	    return 0;
	}
	public int doEndTag() throws JspException {
	    try {  
	    	 HttpServletRequest request = (HttpServletRequest)pageContext.getRequest();
	    	 StringBuffer sb = new StringBuffer();
	    	 
    	 	int classId = ReqUtils.getInt(request,"cId");
    	 	int forumId = ReqUtils.getInt(request,"fId");
    	 	int artId = ReqUtils.getInt(request,"aId");
			String actionstr = ReqUtils.getString(request,"action");
			String arttitle = "";
			String forumName = "";
			String className = "";
			String bbsName = ReqUtils.getStrAtt(request,"bbsname");
			if(classId>0)
				className = ClassBiz.getClassName(classId);
			if(forumId>0)
				forumName = ForumBiz.getForumName(forumId);
			if(artId>0)
			    arttitle = ArticleBiz.getArtTitle(artId);
			
			if(classId>0){
			sb.append("<table class=tab1 align=center cellSpacing=0 cellPadding=0 width=100%>");
	    	sb.append("<tr height=25px class=tr_2><td>&nbsp;&nbsp;");
			sb.append("<a href=index.htm>『");
			sb.append(bbsName);
			sb.append("』</a>&nbsp;→&nbsp;<a href=Class.htm?cId=");
			sb.append(classId);
			sb.append(">『&nbsp;");
			sb.append(className);
			sb.append("&nbsp;』</a>&nbsp;→&nbsp;");
			if(forumId>0){
				sb.append("<a href=Forum.htm?cId=");
				sb.append(classId);
				sb.append("&fId=");
				sb.append(forumId);
				sb.append(">『&nbsp;");
				sb.append(forumName);
				sb.append("&nbsp;』</a>&nbsp;→&nbsp;&nbsp;");
				
				if(artId>0){
					if(actionstr.length()<1){
						sb.append(arttitle);
						Postion.ChangPost(request,"阅读－"+arttitle,forumId);
					}else{
						if(actionstr.equals("replay")){
							sb.append("发表回复");
							Postion.ChangPost(request,"回复－"+arttitle,forumId);
						}
						if(actionstr.equals("edit")||actionstr.equals("editr")){
							sb.append("编辑帖子");
							Postion.ChangPost(request,"编辑帖子－"+arttitle,forumId);
						}
					}
				}else {
					if(actionstr.length()<1){
						sb.append("帖子列表");
						Postion.ChangPost(request,"『"+forumName+"』",forumId);
					}else{
						if(actionstr.equals("post")){
							sb.append("发表新的帖子");
							Postion.ChangPost(request,"发表新的帖子",forumId);
						}else{
							sb.append("发表新的投票");
							Postion.ChangPost(request,"发表新的投票",forumId);
						}
					}
				}
			}else{
				sb.append("论坛列表");
				Postion.ChangPost(request,"『"+className+"』",forumId);
			}
			sb.append("</td></tr>");
			sb.append("</table>");
			}
			 sb.append("<br>");	
	    	 JspWriter out = pageContext.getOut();
	         out.println(sb);
	         sb = null;
	     }catch(Exception e) {
	            bbslog.error("MainHead tag's doEndTag error!");
	     }
	     return 6;
	 }
}