topicdeleteaction.java

myeclipse下mysql-struts-hibernate-tomcat一个BBS 应用

package j2eebbs.admin.action;

import j2eebbs.Constants;
import j2eebbs.DB;
import j2eebbs.Topic;
import j2eebbs.admin.form.TopicManagerForm;

import java.util.Vector;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.sql.DataSource;

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.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

public final class TopicDeleteAction extends Action {
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		TopicManagerForm topicManagerForm = (TopicManagerForm) form;
		String topicid = topicManagerForm.getTopicid();

		HttpSession session = request.getSession();
		Vector topics = new Vector();

		ServletContext context = servlet.getServletContext();
		DataSource dataSource = (DataSource) context
				.getAttribute(Constants.DATASOURCE_KEY);

		DB db = new DB(dataSource);

		String pageForward;
		ActionMessages errors = new ActionMessages();
		if (Topic.delete(db, topicid)) {
			String searchtopic = (String) session
					.getAttribute(Constants.SEARCH_TOPIC_KEY);
			topics = Topic.search(db, searchtopic);
			session.setAttribute(Constants.TOPIC_LIST_KEY, topics);
			pageForward = "ToTopicManager";
		} else {
			errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(
					"error.delete.failed"));
			if (!errors.isEmpty()) {
				saveErrors(request, errors);
			}
			pageForward = "ToErrorPage";
		}

		db.close();
		return (mapping.findForward(pageForward));
	}
}