Question

这里我遇到问题如果我点击一个超级链接它应该运行一个功能并在同一页面 Iam调用java函数更新每次单击特定链接。更新功能只是使用Jdbc连接更新数据库

    <div>
        <h2>.  Pick Atleast THREE....And Max TEN</h2>
    </div>

    <div class="row">
        <h3 style="text-align: center">Department : Computer Science</h3>
        <div class="col three">             
            <a href="#" class="btn btn-sunflower" onclick="<% update("C++",a, n); %>">C!</a>            
        </div>

        <div class="col three">
            <a href="#" class="btn btn-dark-blue" onclick="<% update("C++",a, n); %>">C++!</a>      
        </div>

        <div class="col three">
            <a href="#" class="btn btn-rouge" onclick="<% update("Java",a, n); %>">Java!</a>            
        </div>

        <div class="col three">
            <a href="#" class="btn btn-dark" onclick="<% update("Java Script",a, n); %>">Java Script!</a>       

    </div>

    </div>


    This is the code for Update function is 

<%! 
                static char update(String Update,int id,Integer n)
                {
                    ResultSet rs;
                    System.out.println("The Update Is "+Update+" The id is "+id+"The n values is "+n);
                    Connection con = null;
                    PreparedStatement pst = null;
                    try{
                        Class.forName("org.apache.derby.jdbc.ClientDriver");
                        con = DriverManager.getConnection("jdbc:derby://localhost:1527/Love_To_Learn","Mohammed_Numan","mohammed");
                        String sql = "Update INTREST set Intrest"+n+"='"+Update+"' where USER_ID="+id ;
                        pst = con.prepareStatement(sql);
                        int x = pst.executeUpdate();
                        n++ ;
                    }catch(Exception e){ e.printStackTrace(); }
                } 
            %>

此方法被指定多次执行此方法即使没有点击链接。！
Is this way even possible??If not tell me the Possible solution

我想调用按钮上的java方法Click In Jsp页面

0 个答案: