categoryaction.java

个人blog struts_spring_hibernate

package com.weblog.web;

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.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.actions.DispatchAction;

import com.weblog.model.Category;
import com.weblog.service.CategoryManager;


public class CategoryAction extends DispatchAction {
	private Log log = LogFactory.getLog(CategoryAction.class);

	private CategoryManager mgr = null;

	public void setCategoryManager(CategoryManager categoryManager) {
		this.mgr = categoryManager;
	}

	public ActionForward cancel(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		return mapping.findForward("list");
	}

	public ActionForward delete(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		if (log.isDebugEnabled()) {
			log.debug("entering 'delete' method...");
		}

		DynaActionForm userForm = (DynaActionForm) form;
		Category category = (Category) userForm.get("category");

		mgr.removeCategory(new Long(request.getParameter("category.id")));

		ActionMessages messages = new ActionMessages();
		messages.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(
				"category.deleted", category.getName()));

		saveMessages(request.getSession(), messages);

		return mapping.findForward("categorys");

	}

	public ActionForward edit(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		if (log.isDebugEnabled()) {
			log.debug("entering 'edit' method...");
		}

		DynaActionForm userForm = (DynaActionForm) form;
		String categoryId = request.getParameter("id");

		// null userId indicates an add
		if (categoryId != null) {
			Category category = mgr.getCategory(new Long(categoryId));

			if (category == null) {
				ActionMessages errors = new ActionMessages();
				errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(
						"user.missing"));
				saveErrors(request, errors);

				return mapping.findForward("list");
			}

			userForm.set("category", category);
		}

		return mapping.findForward("edit");

	}

	public ActionForward save(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		if (log.isDebugEnabled()) {
			log.debug("entering 'save' method...");
		}

		if (isCancelled(request)) {
			return list(mapping, form, request, response);
		}

		// run validation rules on this form
		ActionMessages errors = form.validate(mapping, request);

		if (!errors.isEmpty()) {
			saveErrors(request, errors);

			return mapping.findForward("edit");
		}

		DynaActionForm categoryForm = (DynaActionForm) form;
		Category category = (Category) categoryForm.get("category");

		mgr.saveCategory(category);

		ActionMessages messages = new ActionMessages();
		messages.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(
				"category.saved", category.getName()));
		saveMessages(request.getSession(), messages);

		return mapping.findForward("categorys");
	}

	public ActionForward list(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		if (log.isDebugEnabled()) {
			log.debug("entering 'list' method...");
		}

		request.setAttribute("categorys", mgr.getCategorys());

		return mapping.findForward("list");
	}

	public ActionForward unspecified(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		return list(mapping, form, request, response);
	}
}