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java.sql.SQLException:列数与第1行错误处的值计数不匹配

java

我正在尝试在表中插入数据,但是显示以下错误:

java.sql.SQLException:列数与第1行的值数不匹配

我已经搜索了此错误,并尝试了所有解决方案,但仍然无法正常工作。这是我的代码:

class.html

<html>
    <head>
        <title>Class</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>
         <form method="post" action="class.jsp">
            <center>
                <table border="1" width="30%" cellpadding="5">
                    <thead>
                    <tr>
                        <th colspan="2">Enter Information Here</th>
                    </tr>
                </thead>
                <tbody>
            <tr>
                        <td>Class Name</td>
                        <td><input type="text" name="name" value="" /></td>
                    </tr>
                    <tr>
                        <td>Class Strength</td>
                        <td><input type="text" name="strength" value="" /></td>
                    </tr>
                    <tr>
                        <td>Room</td>
                        <td>
                           <input type="text" name="room" value="">

                        </td>
                    </tr>
                    <tr>
                        <td>Section</td>
                        <td><input type="text" name="section" value="" /></td>
                    </tr>
                    <tr>
                        <td><input type="submit" value="Submit" /></td>
                        <td><input type="reset" value="Reset" /></td>
                    </tr>

            </tbody>
                </table>
            </center>
        </form>
    </body>
</html>

class.jsp

<%@ page import ="java.sql.*"  import= "java.sql.Connection"
%>
<%
    String cname = request.getParameter("name");
    String cstrength = request.getParameter("strength");
    String croom = request.getParameter("room");
    String csection = request.getParameter("section");

    //String available = request.getParameter("bavailable");
    Class.forName("com.mysql.jdbc.Driver");
    Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/web",
            "root", "");
    Statement st = con.createStatement();
    //ResultSet rs;
    int i = st.executeUpdate("insert into class(name, strength ,room, section) values ('" + cname + "','" + cstrength + "','" + croom + "','" + csection + "', CURDATE());");
    if (i > 0) {
        //session.setAttribute("userid", user);
        response.sendRedirect("wel.jsp");
       // out.print("Registration Successfull!"+"<a href='index.jsp'>Go to Login</a>");
    } else {
        response.sendRedirect("index.jsp");
    }
%>

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2020-11-30

共1个答案

小编典典

这是您正在运行的查询:

insert into class(name, strength ,room, section) values ('" + cname + "','" + cstrength + "','" + croom + "','" + csection + "', CURDATE());")

您提到了要传递的4个列值(class(name, strength ,room, section)),但随后传递了5个值(CURDATE()的附加值)

在表中添加该新列,然后更新查询以使其也包含该列(即(class(name, strength ,room, section, curdate))),或删除CURDATE()。

2020-11-30