deletestudentaction.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.Student;
import bit.jeffy.service.StudentDao;

public class DeleteStudentAction extends Action{

	private StudentDao studentdao;
	
	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 admin = (Long)request.getSession().getAttribute("curr_admin_id");
		if(admin == null){
			errors.add("fail_1",new ActionMessage("DeleteStudentAction.a"));
			saveErrors(request,errors);
			return (map.getInputForward());
		}
		
		String stid = request.getParameter("sid");
		if(stid == null){
			errors.add("fail_2",new ActionMessage("DeleteStudentAction.b"));
			saveErrors(request,errors);
			return (map.getInputForward());
		}
		long sid = Long.parseLong(stid);
		if(sid < 0){
			errors.add("fail_3",new ActionMessage("DeleteStudentAction.b"));
			saveErrors(request,errors);
			return (map.getInputForward());
		}
		
		Student stu = new Student();
		stu.setId(sid);
		
		if(studentdao.removeById(stu)){
			return (map.getInputForward());
		}else{
			errors.add("fail_4",new ActionMessage("DeleteStudentAction.c"));
			saveErrors(request,errors);
			return (map.getInputForward());
		}

	}
	public StudentDao getStudentdao() {
		return studentdao;
	}
	public void setStudentdao(StudentDao studentdao) {
		this.studentdao = studentdao;
	}
	
}