empqueryaction.java

基于struts的employee

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 EmpQueryAction extends Action{  
	public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,  
		HttpServletResponse response) throws Exception {
	
		DynaActionForm empQueryForm = (DynaActionForm) form;         
		Integer depId = (Integer)empQueryForm.get("depId");
		String name = (String)empQueryForm.get("name");
		
   		ServletContext context = servlet.getServletContext();
		DataSource dataSource = (DataSource)context.getAttribute(Constants.DATASOURCE_KEY);
						
        DB db = new DB(dataSource);
        HttpSession session = request.getSession(true);
		Vector empList = new Vector();

		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 {
			session.setAttribute(Constants.EMP_LIST_KEY,Emp.Search(db,depId.intValue(),name));
  			PageForward="toEmpQueryResult";  
        }
      
		db.close();
 	  	return  mapping.findForward(PageForward);  
	}

}