怎样将页面表单中的元素存储到数据库当中？

我在一个jsp的页面中获得一些用户填写的基本信息，现在想将这些信息插入到数据库中，我写的程序可以执行，也不会报错。但是在数据库中没有出现插入的数据。以下是我的程序代码

    <form method = post action =../ReleaseDepend>

    <table>

    <tr>

        <td></td>

        <td><input type="text" size = 60 name="Warnning" disabled></input></td>

        <td></td>

    </tr>

    <tr>

        <td>顧客名</td>

        <td><input type="text" size =40></input></td>

        <td><input type=button name="customerName" value="选择" onclick = "alert('you clicked the button');"></input></td>

    </tr>

    <tr>

        <td>产品</td>

        <td><select name=productionName size=1>

            <option value="香蕉" selected>香蕉</option>

            <option value="苹果">苹果</option>

        </select></td>

        <td></td>

    </tr>

    <tr>

        <td>版本</td>

        <td><select name=version size=1>

            <option value="赵本山" selected>赵本山</option>

            <option value="宋丹丹">"宋丹丹"</option>

        </select></td>

        <td></td>

    </tr>

    <tr>

        <td>使用次数</td>

        <td><input type="text" name = useTimes size =40></input></td>

        <td>（个数）</td>

    </tr>

    <tr>

        <td>试用时间</td>

        <td><input type="text" name = tryDay size =40></input></td>

        <td>（日）</td>

    </tr>

    <tr>

        <td>时间</td>

        <td><input type="text" id="ReleaseTime" size =40 disabled >

<script language="JavaScript">

    var now = new Date();

    ReleaseTime.value = now.getYear() + "-"+(now.getMonth() + 1) + "-"

            + now.getDate();

</script>

        </td>

        <td></td>

    </tr>

    <tr>

        <td>发行人</td>

        <td><input type="text" name=Releaser size =40></input></td>

        <td></td>

    </tr>

    <tr>

        <td>备注</td>

        <td><textarea name =otherThings cols =40 rows=3></textarea></td>

        <td></td>

    </tr>

    <tr>

        <td></td>

        <td><input type=submit value="发行"></input>    <input

            type=reset value="清空"></input></td>

        <td></td>

    </tr>

</table>

</form>

上面的这个是jsp页面的代码，下面的这个是servlet的代码，路径配置正确。

import java.io.IOException;

import java.sql.*;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.Service.ConnectionFactory;



public class ReleaseDepend extends HttpServlet {



	protected void doGet(HttpServletRequest request,

			HttpServletResponse response) throws ServletException, IOException {

		doPost(request, response);

	}



	protected void doPost(HttpServletRequest request,

			HttpServletResponse response) throws ServletException, IOException {

		String customer = request.getParameter("customer");

		String productionName = request.getParameter("productionName");

		String version = request.getParameter("version");

		String useTimes = request.getParameter("useTimes");

		String tryDay = request.getParameter("tryDay");

		String releaseTime = request.getParameter("releaseTime");

		String releaser = request.getParameter("releaser");

		String otherThings = request.getParameter("otherThings");



		/*

		 * ReleaseDependModel newReleaseDepend = new ReleaseDependModel();

		 * newReleaseDepend

		 * .Doget(customer,productionName,version,useTimes,tryDay

		 * ,releaseTime,releaser,otherThings); ReleaseDependDao newconnection

		 * =new ReleaseDependDao() ; newconnection.InsertData();

		 */

		String sql = "insert into releasedepend(customerName,productionName,version,useTimes,tryDay,releaseDependDay,releaseDepender,otherThings)values('"

				+ customer

				+ "','"

				+ productionName

				+ "','"

				+ version

				+ "','"

				+ useTimes

				+ "','"

				+ tryDay

				+ "','"

				+ releaseTime

				+ "','"

				+ releaser + "','" + otherThings + "')";

		 Connection conn=null; 

		 Statement stmt=null;

		 ConnectionFactory newconn = new ConnectionFactory();

		 try{

			 conn = newconn.getConnection();

		 }

		 catch(Exception e){

			 e.printStackTrace();

		 }

		 try{

			 stmt = conn.createStatement();

			 stmt.executeUpdate(sql);

		 }

		 catch(SQLException e){

			 e.printStackTrace();

		 }

		/*request.setAttribute("customer", customer);

		request.setAttribute("productioName", productionName);

		request.setAttribute("version", version);

		request.setAttribute("useTimes", useTimes);

		request.setAttribute("tryDay", tryDay);

		request.getRequestDispatcher("/jsp/ReleaseComplete.jsp").forward(

				request, response);*/

	}



}