Openshift Tomcat的Mysql的Javascript連接字符串

Question

這是註冊到一個網站的jsp的一部分，它需要用戶插入另一個html中的數據，並把它們放在一個MySQL數據庫...一切工作正常在本地，但是當我上傳的網站Openshift，它給的字符串matot和cittatot錯誤：的方法加入（字符串，字符串[]）是不確定的String類型

我也不能肯定的是，連接字符串是正確的大聲笑

有人可以輕輕地幫助我？

<%@ page import ="java.sql.*" %> 
 

 
<% 
 

 
\t 
 
\t 
 
    String pass = request.getParameter("pass"); 
 
    String email = request.getParameter("email"); 
 
\t String surname = request.getParameter("surname"); 
 
\t String[] citta = request.getParameterValues("citta"); 
 
    String name = request.getParameter("name"); 
 
\t String titolo = request.getParameter("titolo"); 
 
\t String numero = request.getParameter("numero"); 
 
\t String prezzo = request.getParameter("prezzo"); 
 
\t String info = request.getParameter("info"); 
 
\t String[] materia = request.getParameterValues("materia"); 
 
    
 
String matot = String.join(",",materia); 
 
\t String cittatot = String.join(",",citta); 
 
\t 
 
    Class.forName("com.mysql.jdbc.Driver"); 
 

 
    String host = System.getenv("OPENSHIFT_MYSQL_DB_HOST"); 
 
String port = System.getenv("OPENSHIFT_MYSQL_DB_PORT"); 
 
String username = System.getenv("OPENSHIFT_MYSQL_DB_USERNAME"); 
 
String password = System.getenv("OPENSHIFT_MYSQL_DB_PASSWORD"); 
 

 
String url = String.format(":mysql://%s:%s/easylesson", host, port); 
 
Connection con = DriverManager.getConnection(url, username, password); 
 
    Statement st = con.createStatement(); 
 
    //ResultSet rs; 
 
\t \t 
 
    int var = st.executeUpdate(" insert into iscritti(email,pass,datareg,titolo,numero,prezzo,info,cittatot,matot,name,surname) values ('" + email + "','" + pass + "', CURDATE(),'" + titolo + "','" + numero+ "','" + prezzo+ "','" + info+ "','" + cittatot+ "','" + matot + "','" + name + "','" + surname+ "')");

Answer 1

的Tomcat OpenShift包括您可以使用針對這種情況預先定義的數據源。嘗試閱讀示例信息：https://developers.openshift.com/en/tomcat-ds.html關於如何使用它。