从Java向MySQL添加数据抛出异常

Question

我正在尝试将信息从注册表单页面存储到相应的数据库，但代码正在抛出异常，因为“无法连接到数据库”我是一个初学者，并且很难在这里弄清楚出了什么问题。有人可以帮忙吗？

<%@page import="java.sql.*"%>
<html>
<head>  
<meta charset="utf-8">  
<title>Sign Up</title> 
<link rel="stylesheet" type="text/css" href="reg.css">
</head>  
<body> 

<%
  String name = request.getParameter("name");
  String email = request.getParameter("email");
  String password = request.getParameter("password");
  String date = request.getParameter("date");
  String sex = request.getParameter("sex");

  Connection con = null;
  PreparedStatement ps = null;

  String connectionURL = "jdbc:mysql://localhost:3306/table";
  String driverName = "com.mysql.jdbc.Driver";
  String user = "root";
  String pass = "";

  Class.forName(driverName).newInstance();

       try {

            con = DriverManager.getConnection(connectionURL, user, pass);

          String queryString = "INSERT INTO detail(name,password,email,date,sex) VALUES (?,?,?,?,?)";

          ps = con.prepareStatement(queryString);
                ps.setString(1, name);
          ps.setString(2, password);
        ps.setString(3, email);
        ps.setString(4, date);
          ps.setString(5, sex);

          int updateQuery = ps.executeUpdate();
                        if (updateQuery != 0) { 
                            out.println("Successful Registration");
                         }
        } 
        catch (Exception ex) {
        out.println("Unable to connect to database.");

           }
        finally {
            // close all the connections.
            ps.close();
            con.close();
         }
 %>

</body>
</html>

Answer 1

另一答案

从Java向MySQL添加数据抛出异常

使用jsp抛出异常插入mysql数据库