Question

我正在尝试使用HTML表单写入MySql数据库，使用Jquery我无法让servlet写入数据库。我没有看到任何明显我做错的事。这是servlet的代码和HTML文件的代码。

的Servlet

package com.david.servlets;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;


/**
 * Servlet implementation class myForm
 */
public class myForm extends HttpServlet {

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException
        {
              //Get parameters
            String id = request.getParameter("ID");
            String fname = request.getParameter("FirstName");
            String lname = request.getParameter("LastName");


            //Get Connection
            try {
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            } catch (ClassNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println("Found a driver");
            Connection dbConnect = null;
            try {
                dbConnect = getConnection("localhost", 7001);
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (NamingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }


            System.out.println("Made a connection");


                //Create Query
            String query = "INSERT INTO test.customer (ID, FirstName, LastName) " + 
                    "VALUES (" + id + ", " + fname + ", " + lname + ")";
            PreparedStatement dbStatement = null;
            try {
                dbStatement = dbConnect.prepareStatement(query);
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            //Execute Query
            try {
                dbStatement.executeUpdate(query);
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            //close connection
            try {
                dbStatement.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            try {
                dbConnect.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }





public Connection getConnection(String server, int port)
        throws SQLException, NamingException {
    Context ctx = null;
    Hashtable ht = new Hashtable();
    ht.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
    ht.put(Context.PROVIDER_URL, "t3://"+server+":"+port);
    ctx = new InitialContext(ht);
    DataSource ds = (javax.sql.DataSource) ctx.lookup ("localmysql");
    Connection conn =  ds.getConnection();
    //conn.setAutoCommit( true );
    return conn;
}    





}

HTML：

<html>
<head>
<title>myForm</title>
<script src="http://ajax.microsoft.com/ajax/jquery/jquery-1.4.2.js" type="text/javascript"></script>
<script type="text/javascript">

    $("#submit").click(function () {
        Var ID = $("#ID").val();
        Var FirstName = $("#FirstName").val();
        Var LastName = $("#LastName").val();
        $.post("myForm", $("form").serialize(), insertCallback);
    });

    function insertCallback(result) {
        if (result == "success") {
            alert("Record added!");
        } else {
            alert("Could not add Record!");
        }
    }

</script>
</head>
<body>
<form action="myForm" method="POST">
ID: <input type="number" name="ID">
FirstName: <input type="text" name="FirstName"> <br>
LastName: <input type="text" name="LastName">  <br>
<input type="button" value="submit">
</form>
</body>
</html>

Answer 1

（1）您需要提交一个id="submit"提交按钮才能使用您的点击功能。

（2）将Var更改为var。

Jquery表单数据插入MySQL数据库

1 个答案: