deleteselectedcourseaction.java

使用struts+spring+JDBC 实现的学生选课管理系统

package bit.jeffy.action;

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 bit.jeffy.entity.SelectCourse;
import bit.jeffy.service.SelectCourseDao;

public class DeleteSelectedCourseAction extends Action{
	private SelectCourseDao selectcoursedao;
	
	public ActionForward execute(ActionMapping map, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws Exception {
		// TODO 自动生成方法存根
		ActionMessages errors = new ActionMessages();
		
		Long user = (Long)request.getSession().getAttribute("curr_stu_id");
		if( user==null){
			errors.add("fail_1",new ActionMessage("DeleteSelectedCourseAction.a"));
			saveErrors(request,errors);
			return (map.getInputForward());
		}
		
		String scid = (String)request.getParameter("scid");
		long sid = Long.parseLong(scid);
		if(sid < 0){
			errors.add("fail_2",new ActionMessage("DeleteSelectedCourseAction.b"));
			saveErrors(request,errors);
			return (map.getInputForward());
		}
		
		SelectCourse sc = new SelectCourse();
		sc.setId(sid);
		if(!selectcoursedao.remove(sc)){
			errors.add("fail_3",new ActionMessage("DeleteSelectedCourseAction.c"));
			saveErrors(request,errors);
		}
		return (map.getInputForward());
	}
	public SelectCourseDao getSelectcoursedao() {
		return selectcoursedao;
	}
	public void setSelectcoursedao(SelectCourseDao selectcoursedao) {
		this.selectcoursedao = selectcoursedao;
	}

}