创建表 JDBC-MS-ACCESS

Question

插入值表分支后，我想创建一个新表。值来自 jsp 页面。值已成功插入，但未创建表，它不检查 if 语句，我只有一个空白页。 谢谢。

 package Servlets;

    import java.io.IOException;
    import java.io.PrintWriter;
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.SQLException;
    import java.sql.Statement;
    import java.util.logging.Level;
    import java.util.logging.Logger;
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;


    @WebServlet(name = "Decidetest", urlPatterns = {"/Decidetest"})
    public class Decidetest extends HttpServlet {


        protected void processRequest(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
            response.setContentType("text/html;charset=UTF-8");
            PrintWriter out = response.getWriter();
            Connection con;
            Statement s; 
             String branch=request.getParameter("branch");
             String semester=request.getParameter("semester");
             String course=request.getParameter("course");
             String name=request.getParameter("tname");
             String time=request.getParameter("duration");
             String number=request.getParameter("number");
             String type=request.getParameter("r1");
            try {
                 Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               con=DriverManager.getConnection("jdbc:odbc:online_testing");
               s=con.createStatement();
               String sql="insert into tests(branch,sem,course,testname,duration,noofque) values('"+branch+"','"+semester+"','"+course+"','"+name+"','"+time+"','"+number+"')";
               s.executeUpdate(sql);
               String sql3="CREATE TABLE "+name+"(option1 varchar(255)),option2 varchar(255),option3 varchar(255),option4 varchar(255),answer varchar(255)) ";
                s.executeUpdate(sql3);
s.close();
con.close();
               if(type.equals("make"))
               {
                  response.sendRedirect("preparetest.jsp");
               }
                else
               {
                  response.sendRedirect("selectbank.jsp");
               }
            } catch (SQLException ex) {
                Logger.getLogger(Decidetest.class.getName()).log(Level.SEVERE, null, ex);
            } catch (ClassNotFoundException ex) {
                Logger.getLogger(Decidetest.class.getName()).log(Level.SEVERE, null, ex);
            } finally {            
                out.close();
            }
        }

        // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">

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

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


        @Override
        public String getServletInfo() {
            return "Short description";
        }// </editor-fold>
    }

Answer 1

您在 options1 定义后关闭两个 )

String sql3="CREATE TABLE "+name+" (option1 varchar(255),option2 varchar(255),option3 varchar(255),option4 varchar(255),answer varchar(255)) ";