?? looknoteaction.java
字號:
package StudyNote;
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.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import javax.servlet.ServletContext;
import javax.sql.DataSource;
import java.sql.Connection;
import javax.servlet.http.*;
import java.util.*;
import org.apache.struts.action.DynaActionForm;
public final class LookNoteAction extends Action{
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception {
DynaActionForm pageIdForm = (DynaActionForm) form;
Integer pageId = (Integer)pageIdForm.get("pageId");
int iPageId = 0;
if (pageId!=null) iPageId = pageId.intValue();
if (iPageId<0) iPageId = 0;
ServletContext context = servlet.getServletContext();
DataSource dataSource = (DataSource)context.getAttribute(Constants.DATASOURCE_KEY);
DB db = new DB(dataSource);
HttpSession session = request.getSession(true);
Vector noteList = new Vector();
int noteCount = Note.GetNoteCount(db);
int iPageCount;
if (noteCount%Constants.NOTE_PAGE_SIZE==0) {
iPageCount = noteCount/Constants.NOTE_PAGE_SIZE;
}
else{
iPageCount = noteCount/Constants.NOTE_PAGE_SIZE+1;
}
String PageForward;
ActionMessages errors = new ActionMessages();
String username=(String)session.getAttribute(Constants.LOGIN_USERNAME_KEY);
if (username==null){
errors.add(ActionMessages.GLOBAL_MESSAGE,
new ActionMessage("errors.accessDeny"));
if (!errors.isEmpty()) {
saveErrors(request, errors);
}
PageForward="toWrong";
}
else if (noteCount==0){
session.setAttribute(Constants.NOTE_LIST_KEY,noteList);
session.setAttribute(Constants.CUR_PAGEID_KEY,new Integer(iPageId));
session.setAttribute(Constants.NOTE_PAGE_COUNT_KEY,new Integer(iPageCount));
PageForward="toNoteMain";
}
else if (noteCount<iPageId * Constants.NOTE_PAGE_SIZE + 1){
iPageId--;
errors.add(ActionMessages.GLOBAL_MESSAGE,
new ActionMessage("errors.pageEnd"));
if (!errors.isEmpty()) {
saveErrors(request, errors);
}
PageForward="toWrong";
}
else{
noteList = Note.SearchNoteTitle(db,iPageId);
session.setAttribute(Constants.NOTE_LIST_KEY,noteList);
session.setAttribute(Constants.CUR_PAGEID_KEY,new Integer(iPageId));
session.setAttribute(Constants.NOTE_PAGE_COUNT_KEY,new Integer(iPageCount));
PageForward="toNoteMain";
}
db.close();
return mapping.findForward(PageForward);
}
}
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