authoraction.java

struts+hibernate+spring的blog,本人也是下载的

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.Author;
import com.weblog.service.AuthorManager;

public final class AuthorAction extends DispatchAction {

	private final Log log = LogFactory.getLog(AuthorAction.class);

	private AuthorManager mgr = null;

	public void setAuthorManager(AuthorManager authorManager) {
		this.mgr = authorManager;
	}

	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");
		}

		ActionMessages messages = new ActionMessages();
		DynaActionForm authorForm = (DynaActionForm) form;

		// Exceptions are caught by ActionExceptionHandler
		Author author = (Author) authorForm.get("author");
		mgr.removeAuthor(request.getParameter("author.id"));

		messages.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(
				"author.deleted"));

		// save messages in session, so they'll survive the redirect
		saveMessages(request.getSession(), messages);

		return mapping.findForward("search");
	}

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

		DynaActionForm authorForm = (DynaActionForm) form;

		String authorId = request.getParameter("id");

		// null userId indicates an add
		if (authorId != null) {
			Author author = mgr.getAuthor(authorId);

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

				return mapping.findForward("list");
			}

			authorForm.set("author", author);
		}

		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 authorForm = (DynaActionForm) form;
		Author author = (Author) authorForm.get("author");

		mgr.saveAuthor(author);

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

		return mapping.findForward("authors");
	}

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

		request.setAttribute("authors", mgr.getAuthors());

		return mapping.findForward("list");
	}

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