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