Question

我有这张桌子：

<table style="width:100%">
 <table id="Dest_table">
       <tr>
    <th>Check </th>
    <th>Country</th>
    <th>City</th> 
    <th>Url of Destination</th>
    <th>Category</th>
  </tr>
  <tr> <%while(rs.next()){ %>
    <td><INPUT type="checkbox" name="chk"/></td>
    <td> <%=rs.getString("COUNTRY") %></td>
    <td> <%=rs.getString("CITY") %> </td> 
    <td> <a href=<%=rs.getString("URL") %> > <%=rs.getString("URL") %> </a>

  </td>
  </tr>
   <% } %>
</table>

这个函数删除表上的一行：

<SCRIPT language="javascript">
 function deleteRow(Dest_table) {
            try {
            var table = document.getElementById(Dest_table);
            var rowCount = table.rows.length;

            for(var i=0; i<rowCount; i++) {
                var row = table.rows[i];
                var chkbox = row.cells[0].childNodes[0];
                if(null != chkbox && true == chkbox.checked) {
                    table.deleteRow(i);
                    rowCount--;
                    i--;
                }


            }
            }catch(e) {
                alert(e);
            }
        }



    </SCRIPT>

但超出我在函数中删除的行，我需要在数据库中删除它的同一行，但我不知道如何...任何帮助？

Answer 1

你可以尝试这个：

在表格中添加隐藏的输入。然后将数据库记录的行ID放在其上。

<tr> <%while(rs.next()){ %>

    <td><input type="hidden" value="row_id" id="rows"/></td>

    <!--insert your code here-->

</td>

创建一个删除数据库中的行的函数：

function delete(row_id) {
        if (window.XMLHttpRequest) {
            xmlhttp = new XMLHttpRequest();
        } else {
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
    xmlhttp.open("POST", jsp_url?row_id, false);
    xmlhttp.send(null);
    document.getElementById("table_id").innerHTML = xmlhttp.responseText;
}

其中 jsp_url 是您的jsp的url， row_id 是您要删除的表行的ID。然后调用循环中的delete函数删除表格行。

for(var i=0; i<rowCount; i++) {

    <!--insert your code here-->

    var row_id = document.getElementById('rows'+i).value;
    if(null != chkbox && true == chkbox.checked) {

        <!--insert your code here-->

        delete(row_id);
    }
}

Answer 2

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        int id = Integer.parseInt(request.getParameter("id"));
        StudentDAO db = new StudentDAO();
        db.delete(id);
        response.sendRedirect("list");
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

  
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }


}
public void delete(int id) {
        String sql = "DELETE FROM [dbo].[Student]\n"
                + "      WHERE id = " + id;
        try {
            PreparedStatement statement = connection.prepareStatement(sql);
            ResultSet rs = statement.executeQuery();
        } catch (SQLException ex) {
            Logger.getLogger(StudentDAO.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

删除数据库中的一行（JSP）

2 个答案: