HTTP500错误

在做小练习时有一次出现http500错误，查询上一次的错误，虽然类似但是有不同

java.lang.NumberFormatException: null
	java.lang.Integer.parseInt(Integer.java:542)
	java.lang.Integer.parseInt(Integer.java:615)
	com.bjpowernode.controller.AddStudentServlet.doGet(AddStudentServlet.java:22)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:655)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

检查类型转换也没有问题，通过仔细阅读错误信息发现我的前端代码本来是通过post请求方式传递参数，但是错误信息却显示"doget"方法

com.bjpowernode.controller.AddStudentServlet.doGet(AddStudentServlet.java:22)

重新回去检查代码，发现把应该写在dopost方法中的代码写进了doget中

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String strName = request.getParameter("name");
        String strAge = request.getParameter("age");


        String config = "application-context.xml";
        ApplicationContext atc = new ClassPathXmlApplicationContext(config);
        StudentService studentService = (StudentService) atc.getBean("studentService");

        Student student = new Student();


        student.setStuage(Integer.parseInt(strAge));

        student.setStuname(strName);


        studentService.addStudent(student);

        request.getRequestDispatcher("/show.jsp").forward(request,response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
      
    }

在dopost中也没能重写doget方法导致的，修改代码后解决问题。