Question

<html>
<%@ page import="java.sql.*" %>
<head>
<title>Sarvotam List</title>
<link rel="stylesheet" href="Styles/main.css">
</head>
<body>
<div class="seg">
    <form action="main.jsp" method="post">
    <table class="data" align="center" width=80%>
        <tr>
            <th width=20%>Qualification Exam</th>       
            <th width=20%>Course Type</th>
            <th width=20%>Duration</th>
            <th width=20%>Number of Cheques</th>
            <th width=20%>Course_Category</th>
        </tr>
        <tr>
            <td width=20% align="center"><input type="text" name="qual" 
  width=20%></td>
            <td width=20% align="center"><input type="text" name="ctype" 
  width=20%></td>
            <td width=20% align="center"><input type="number" name="dur" 
  width=20%></td>
            <td width=20% align="center"><input type="number" name="che" 
width=20%></td>
            <td width=20% align="center"><select name="opt">
                    <option id="ENG">ENG</option>
                    <option id="MED">MED</option>
                    <option id="OTH">OTH</option>
                    <option id="PG">PG</option>
                </select>
        </tr>
        <tr>
            <td width=20% align="center"><input type="text" name="qual" 
 width=20%></td>
            <td width=20% align="center"><input type="text" name="ctype" 
width=20%></td>
            <td width=20% align="center"><input type="number" name="dur" 
     width=20%></td>
            <td width=20% align="center"><input type="number" name="che" 
width=20%></td>
            <td width=20% align="center"><select name="opt">
                    <option id="ENG">ENG</option>
                    <option id="MED">MED</option>
                    <option id="OTH">OTH</option>
                    <option id="PG">PG</option>
                </select>
        </tr>
        <tr>
            <td width=20% align="center"><input type="text" name="qual" 
width=20%></td>
            <td width=20% align="center"><input type="text" name="ctype" 
width=20%></td>
            <td width=20% align="center"><input type="number" name="dur" 
width=20%></td>
            <td width=20% align="center"><input type="number" name="che" 
width=20%></td>
            <td width=20% align="center"><select name="opt">
                    <option id="ENG">ENG</option>
                    <option id="MED">MED</option>
                    <option id="OTH">OTH</option>
                    <option id="PG">PG</option>
                </select>
        </tr>
        <tr>
            <td width=20% align="center"><input type="text" name="qual" 
width=20%></td>
            <td width=20% align="center"><input type="text" name="ctype" 
width=20%></td>
            <td width=20% align="center"><input type="number" name="dur" 
width=20%></td>
            <td width=20% align="center"><input type="number" name="che" 
width=20%></td>
            <td width=20% align="center"><select name="opt">
                    <option id="ENG">ENG</option>
                    <option id="MED">MED</option>
                    <option id="OTH">OTH</option>
                    <option id="PG">PG</option>
                </select>
        </tr>
        <tr>
            <td width=20% align="center"><input type="text" name="qual" 
  width=20%></td>
            <td width=20% align="center"><input type="text" name="ctype" 
 width=20%></td>
            <td width=20% align="center"><input type="number" name="dur" 
    width=20%></td>
            <td width=20% align="center"><input type="number" name="che" 
width=20%></td>
            <td width=20% align="center"><select name="opt">
                    <option id="ENG">ENG</option>
                    <option id="MED">MED</option>
                    <option id="OTH">OTH</option>
                    <option id="PG">PG</option>
                </select>
        </tr>
            </table>
        <center><button id="submit" name="save">Submit</button></center>

<%              try{
    ResultSet rs=null;
    Statement st=null;
    Connection conn = null;
    Class.forName("oracle.jdbc.driver.OracleDriver");
            conn = 
   DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE", 
   "system", "parents94");
            st=conn.createStatement();
            int i=0;
            String s = request.getParameter("save");
            String[] qual=request.getParameterValues("qual");
            String[] ctype=request.getParameterValues("ctype");
            String[] dur=request.getParameterValues("dur");
            String[] noc=request.getParameterValues("che");
            String[] cou=request.getParamterValues("opt");
            if(s!=null)
            while(qual[i].length()!=0){
                st.executeUpdate("insert into SCHOL_COURSE_MASTER values('"+qual[i]+"','"+ctype[i]+"','"+dur[i]+"','"+noc[i]+"','"+cou[i]+"')");
                i++;
            }
        conn.close();
        st.close(); 
            }
catch(Exception e)
    {
        e.getMessage();
    }
%>
</form> 
</div>
  </body>
 </html>

这是我的代码我需要从表中的用户那里获取输入并添加到数据库中所有连接都有效但是sql查询不会导致数据库中的任何更改我只需要帮助知道如何编写代码来按下提交按钮

Answer 1

将提交类型添加到按钮：

<center>
    <button type="submit" id="submit" name="save">Submit</button>
</center>

Answer 2

首先你可能想检查一下点击事件已被触发？

然后尝试打印，如果你得到正确的值或它是否为空

如果您在帖子中包含错误，则错误会更好

在HTML中将按钮添加到按钮

2 个答案: