Fifty-Seventh Commit: Refactor Add Events web page to handle user submitting form with empty fields

Author: AAdewunmi

src/java/AddEvent.java

@@ -40,28 +40,38 @@ protected void doPost(HttpServletRequest request, HttpServletResponse response)
        String a6 = request.getParameter("venue");
        String a7 = request.getParameter("date");
 
-       try{
-           Class.forName("com.mysql.cj.jdbc.Driver");
-           String conURL = "jdbc:mysql://localhost:3306/EventlyDB";
-           String userName = "root";
-           String userPassword = "abc";
-           Connection con = DriverManager.getConnection(conURL, userName, userPassword);
-           con.setAutoCommit(false); 
-           
-           Statement statement = con.createStatement();
-           String queryStatement = "insert into Event values('"+a1+"','"+a2+"','"+a3+"','"+a4+"','"+a5+"','"+a6+"','"+a7+"')";
-           statement.executeUpdate(queryStatement);
-           RequestDispatcher requestDispatcher = request.getRequestDispatcher("CreateE.html");
-           requestDispatcher.include(request, response);
+       if(a1.isBlank() && a2.isBlank() && a3.isBlank() && a4.isBlank() && a5.isBlank() && a6.isBlank() && a7.isBlank()){
+            response.setContentType("text/html");  
+            out.println("<script type=\"text/javascript\">");  
+            out.println("alert('Please Enter Event Details!!!');");  
+            out.println("</script>");
+            RequestDispatcher requestDispatcher = request.getRequestDispatcher("CreateE.html");
+            requestDispatcher.include(request, response);
+       }else{
+           try{
+                Class.forName("com.mysql.cj.jdbc.Driver");
+                String conURL = "jdbc:mysql://localhost:3306/EventlyDB";
+                String userName = "root";
+                String userPassword = "abc";
+                Connection con = DriverManager.getConnection(conURL, userName, userPassword);
+                con.setAutoCommit(false); 
+
+                Statement statement = con.createStatement();
+                String queryStatement = "insert into Event values('"+a1+"','"+a2+"','"+a3+"','"+a4+"','"+a5+"','"+a6+"','"+a7+"')";
+                statement.executeUpdate(queryStatement);
+                RequestDispatcher requestDispatcher = request.getRequestDispatcher("CreateE.html");
+                requestDispatcher.include(request, response);
+
+                out.println("<br><center><h3> Event Added</h3></center>");
+                System.out.println("Added to the database!!!");
+                con.commit();
+                con.close();
+            }catch(ServletException | IOException | ClassNotFoundException | SQLException e){
+                System.out.println("Exception caught: " + e);
+            }
 
-           out.println("<br><center><h3> Event Added</h3></center>");
-           System.out.println("Added to the database!!!");
-           con.commit();
-           con.close();
-       }catch(ServletException | IOException | ClassNotFoundException | SQLException e){
-           System.out.println("Exception caught: " + e);
        }
+       
     }
 
-
 }