replytag.java

一个非常简单的mvc留言板MVC框架是STRUTS框架的基础

package com.aptech.tag;

import java.io.IOException;
import java.util.List;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyContent;
import javax.servlet.jsp.tagext.BodyTagSupport;

import com.aptech.bean.Reply;
import com.aptech.dao.ReplyDAO;

public class ReplyTag extends BodyTagSupport {
	@Override
	public int doAfterBody() throws JspException {
		//得到标签体对象
		BodyContent body = this.getBodyContent();
		//得到标签体的字符串表示
		String sid = body.getString().trim();
		//创建ReplyDAO对象
		ReplyDAO rd = new ReplyDAO();
		List list = rd.getRepliesByReplyId(Integer.parseInt(sid));
		//显示List中的内容
		JspWriter out = body.getEnclosingWriter();
		Reply reply = null;
		try {
			if(list != null && list.size() > 0){
				out.println("<ul>");
				for(int i = 0; i < list.size(); i ++){
					reply = (Reply)list.get(i);
					out.println("<li>" + reply.getRcontent() 
							+ "[" + reply.getRdatetime() 
							+ "]");
				}
				out.println("</ul>");
			}else{
				out.println("暂无回复");
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return SKIP_BODY;
	}
}