deletecourseaction.java

来自「使用struts+spring+JDBC 实现的学生选课管理系统」· Java 代码 · 共 57 行

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.Course;
import bit.jeffy.service.CourseDao;

public class DeleteCourseAction extends Action{
	private CourseDao coursedao;
	
	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_tea_id");
		if(user == null){
			errors.add("fail_1",new ActionMessage("DeleteCourseAction.a"));
			saveErrors(request,errors);
			return (map.getInputForward());
		}
		
		String tmp = (String)request.getParameter("cid");
		long cid = Long.parseLong(tmp);
		
		if(cid < 0){
			errors.add("fail_2",new ActionMessage("DeleteCourseAction.b"));
			saveErrors(request,errors);
			return (map.getInputForward());
		}
		
		Course c = new Course();
		c.setId(cid);
		if(!coursedao.delete(c)){
			errors.add("fail_3",new ActionMessage("DeleteCourseAction.c"));
			saveErrors(request,errors);
		}
		
		return (map.getInputForward());
	}
	public CourseDao getCoursedao() {
		return coursedao;
	}
	public void setCoursedao(CourseDao coursedao) {
		this.coursedao = coursedao;
	}

}