categorymodaction.java

来自「一个基本的图书馆管理系统」· Java 代码 · 共 78 行

package c18.struts.action;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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 c18.entity.Category;
import c18.service.BookService;
import c18.service.BookServiceImpl;
import c18.session.UserSession;
import c18.struts.action.exception.ActionException;
import c18.util.ConvertUtil;

/** 
 * 
 * 图书分类修改Action类
 * @struts.action path="/category_mod" scope="request"
 * @struts.action-forward name="success" path="/category_mod.jsp"
 */
public class CategoryModAction extends Action {
	private static final Log log = LogFactory.getLog(CategoryModAction.class);

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		//判断是否管理员
		if(!UserSession.isManager(request, response)){
			return mapping.findForward("/main");
		}
		
		//得到分类号
		int categoryNo =0;
		String scategoryNo = request.getParameter("modcategoryNo");
		if(scategoryNo != null && !scategoryNo.equals("")){
			categoryNo = ConvertUtil.convertInt(scategoryNo);
		}
		try {
			//创建BookService对象
			BookService bookservice = new BookServiceImpl(); 
			//得到分类信息
			Category category = bookservice.getCategory(categoryNo);
			if(category == null){ //分类信息不在
				request.setAttribute("errorString", "分类信息错误");
				return mapping.findForward("success");
			}
			//得到父分类信息
			Category parentcategory = bookservice.getCategory(category.getParentNo());
			if(parentcategory == null){
				parentcategory = new Category();
				parentcategory.setName("根分类");
			}
			
			
			//在Request中放入查询结果
			request.setAttribute("category", category);
			request.setAttribute("parentname", parentcategory.getName());
			
		} catch (ActionException e) {
			log.error(e);
		}
				
		return mapping.findForward("success");
	}
}