jsp HTTP Status 405 - HTTP method GET is not supported by this URL

package myservlet.control;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletConfig;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class method2 extends HttpServlet {

    @Override

    public void init(ServletConfig config) throws ServletException {

        // TODO Auto-generated method stub

        super.init(config);

    }

    @Override

    protected void doPost(HttpServletRequest req, HttpServletResponse resp)

            throws ServletException, IOException {

        // TODO Auto-generated method stub

        //super.doPost(req, resp);

        req.setCharacterEncoding("gb2312");

        resp.setContentType("text/html;charset=gb2312");

        PrintWriter out = resp.getWriter();

        String name = req.getParameter("name");

        String num[] = name.split("[,,]");

        String method = req.getMethod();

        double sum = 0;

        for (String item:num) {

            if(item.length()>=1)

            sum += Double.parseDouble(item);

        }

        out.print("用户的请求方式为" + method );

        for (String item:num) {

            if(item.length()>=1)

            out.print(item+"");

        }

        out.print("和是"+sum);

    }

    @Override

    protected void doGet(HttpServletRequest req, HttpServletResponse resp)

            throws ServletException, IOException {

        // TODO Auto-generated method stub

      // super.doGet(req, resp);

        req.setCharacterEncoding("gb2312");

        resp.setContentType("text/html;charset=gb2312");

        PrintWriter out = resp.getWriter();

        String name = req.getParameter("name");

        String num[] = name.split("[,,]");

        String method = req.getMethod();

        double product = 1;

        for (String item:num) {

            if(item.length()>=1)

                product *= Double.parseDouble(item);

        }

        out.print("用户的请求方式为" + method );

        for (String item:num) {

            if(item.length()>=1)

            out.print(item+"");

        }

        out.print("积是"+product);

    }

    }

是因为重写doPost或doGet方法时

   super.doPost(req, resp);

 super.doGet(req, resp);
去掉这2句话就可以了

HTTP Status 500 -

org.apache.jasper.JasperException: /Login/login.jsp(27,12) According to TLD, tag jsp:getProperty must be empty, but is not

错误的原因是:<jsp:getProperty name="loginBean" property="backNews" />最后这里少了反斜杠