bookdetailaction.java

模仿当当网基于struts+hierbernate与mysql的商务网站。

package org.whatisjava.dang.action;

import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.whatisjava.dang.domain.Book;
import org.whatisjava.dang.domain.Comment;
import org.whatisjava.dang.service.CatalogService;
import org.whatisjava.dang.service.CommentService;

public class BookDetailAction extends Action {

	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		CatalogService service=new CatalogService();
		CommentService service1=new CommentService();
		
		String IdStr=request.getParameter("id");
		if(IdStr!=null){
			int id=Integer.parseInt(IdStr);
			Book book=service.getBookById(id);
			request.setAttribute("book", book);
			List<Comment> list=service1.findCommentByProduct(book, false);
			request.setAttribute("commentNum", list.size());
			if(list.size()>10){
				list=list.subList(0, 10);
			}
			request.setAttribute("comments", list);
		}
		return mapping.findForward("success");
	}
}