我正在尝试使用Java jsp将数据插入本地计算机的SQL数据库中

Question

I am creating a web application in java jsp using Eclipse and Tomcat.but I am stock unable to insert the data in to my local SQL server. 我正在使用Eclipse和Tomcat在Java JSP中创建Web应用程序，但是我无法将数据插入到本地SQL服务器中。 The Form of the page is coded in HTML then I want the Java code part to get the data entered and insert the data in to the database but when I click the submit button absolutely nothing happens, no error message, no warning so far I am only able to type and clear the form. 页面的表单用HTML编码，然后我希望Java代码部分获取输入的数据并将数据插入数据库中，但是当我单击“提交”按钮时，绝对没有任何反应，没有错误消息，到目前为止没有警告只能输入和清除表格。 I am very new in Java. 我是Java的新手。 I just pick up this codding language recently but I am determine to learn it. 我最近才学习这种编码语言，但我决定学习它。

Help please here is my full code.


   <%@ page import="java.text.*,java.util.*" session="false"%>
   <%@ page import="java.sql.*" %>
   <%@page import="javax.swing.JOptionPane" %>
   <%@page import="java.util.Date" %>
   <%@page import ="java.io.IOException" %>
   <%@page import ="javax.servlet.ServletException" %>
   <%@page import ="javax.servlet.http.HttpServlet" %>
   <%@page import ="javax.servlet.http.HttpServletRequest" %>
   <%@page import ="javax.servlet.http.HttpServletResponse" %>
   <% Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); %>

   <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>Insert Laptops Data</title>
    <link rel="stylesheet" href="Style.css" type="text/css">
    </head>

    <body>

    <%!public class Insert extends HttpServlet {



        String dbURL = "jdbc:sqlserver://localhost\\SQLYRSIN";
        String user = "pass";
        String pass = "pass";
        Connection conn = null;
        PreparedStatement InsertLaptops = null;
        ResultSet resultSet = null;

        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException  {

            String LaptopMake, LaptopModel, LaptopServicetag, LaptopDatein, LaptopNotes, LaptopType;
            LaptopMake = req.getParameter("iMake");
            LaptopModel = req.getParameter("iModel");
            LaptopServicetag = req.getParameter("iServiceTag");
            LaptopDatein = req.getParameter("iDatein");
            LaptopNotes = req.getParameter("iNotes");
            LaptopType = req.getParameter("iType");

            try {

                conn = DriverManager.getConnection(dbURL, user, pass);

                Statement st = conn. createStatement();
                st.executeUpdate("INSERT INTO LaptopsTable (Make, Model,  [Service Tag], Datein, Notes, Type)"
                                + " VALUES  ('"+LaptopMake+"','"+LaptopModel+"','"+LaptopServicetag+"','"+LaptopDatein +"','"+LaptopNotes+"','"+LaptopType+"')");

                JOptionPane.showConfirmDialog(null, "Your Data Has been  Inserted", "Result", JOptionPane.DEFAULT_OPTION,
                        JOptionPane.PLAIN_MESSAGE);
                st.close();
                conn.close();

            } catch (SQLException ex) {
                ex.printStackTrace();
            }

        }


    }%>
        <div id="header">
        <div class="logo">
            <a href="#"><span> Resident Screening</span> Jinventory </a>
        </div>
    </div>

    <div id="container">
        <div class="content">
            <h1>Add New Laptop</h1>

            <p>Make sure all Service Tag Enter in here are Laptops</p>

            <div id="box">
                <form name="LaptopsForm" method="get" class="contentfonts"
                    action="LaptopsInsert2.jsp" method="Post">
                    <table>
                        <tbody>

                            <tr>
                                <td>Service Tag</td>
                                <td><input type="text" name="iServiceTag" size="40"></td>
                            </tr>
                            <tr>
                                <td>Make</td>
                                <td><input type="text" name="iMake" size="40"></td>
                            </tr>
                            <tr>
                                <td>Model</td>
                                <td><input type="text" name="iModel"></td>
                            </tr>
                            <tr>
                                <td>Date</td>
                                <td><input type="date" name="iDate"></td>
                            </tr>
                            <tr>
                                <td>Type</td>
                                <td><input type="text" name="iTyped"  Value="Laptop"
                                    disabled="disabled"></td>
                            </tr>
                            <tr>
                                <td>Notes</td>
                                <td><input Type="text" name="iNotes" size="30" height="40"></td>
                            </tr>

                            <tr>
                                <td><input type="reset" name="Reset"></td>
                                <td><input type="submit" name="submit"></td>
                            </tr>
                        </tbody>
                    </table>
                </form>


            </div>

        </div>
    </div>

    </body>
    </html>

Answer 1

Here's a draft which you could use as a starting point. 这是草稿，您可以以此为起点。

As mentioned before, you should seriously consider some changes to your design: 如前所述，您应该认真考虑对设计的一些更改：

Separate View (.jsp) from Business-Logic (SQL-Statements etc.) 将视图（.jsp）与业务逻辑（SQL语句等）分开
Don't use scriptlets ( <% and so on ) 不要使用scriptlet（<％等）
Creating a Servlet within JSP is overkill - a JSP is compiled into a servlet by the servlet container. 在JSP中创建Servlet是多余的-Servlet容器将JSP编译为Servlet。
Don't create Connections one-by-one. 不要一一创建连接。 Use a connection pool. 使用连接池。 This will pay off quickly. 这将很快得到回报。

In the code you'll see some changes to your setup: 在代码中，您将看到对设置的一些更改：

form is submitted per POST 表格是根据POST提交的
instead of subclass, JSP checks for methods POST and only then tries the insert. JSP会检查方法POST，而不是子类，然后才尝试插入。
never ever use Swing inside Webapps. 永远不要在Webapp中使用Swing。 If that JOptionPane was opened, your webapp would block at that point, while the Dialog was shown somewhere on your server. 如果打开了该JOptionPane ，则此时对话框将显示在服务器上的某个位置，此时您的Web应用将被阻止。
Use of PreparedStatement instead of Statement this prevents SQL injection. 使用PreparedStatement代替Statement可以防止SQL注入。 You'll still want to check against Cross-Site-Scripting if you plan on displaying the inserted values in your webapp again. 如果您打算再次在Web应用程序中显示插入的值，您仍将需要对照跨站点脚本进行检查。

Disclaimer: I haven't tested or even tried to compile this code. 免责声明：我尚未测试甚至尝试编译此代码。 Edit was done only to point you in the right direction. 编辑只是为了使您指向正确的方向。

Here it goes 来了

<%@page import="java.text.*,java.util.*" session="false"%>
<%@page import="java.sql.*" %>
<%@page import="java.util.Date" %>
<%@page import ="java.io.IOException" %>
<%@page import ="javax.servlet.ServletException" %>
<%@page import ="javax.servlet.http.HttpServlet" %>
<%@page import ="javax.servlet.http.HttpServletRequest" %>
<%@page import ="javax.servlet.http.HttpServletResponse" %>
<% Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); %>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert Laptops Data</title>
<link rel="stylesheet" href="Style.css" type="text/css">
</head>

<body>

<%
if("POST".equals(request.getMethod()) {

  String dbURL = "jdbc:sqlserver://localhost\\SQLYRSIN";
  String user = "pass";
  String pass = "pass";
  Connection conn = null;
  PreparedStatement InsertLaptops = null;
  ResultSet resultSet = null;


  String LaptopMake, LaptopModel, LaptopServicetag, LaptopDatein, LaptopNotes, LaptopType;
  LaptopMake = req.getParameter("iMake");
  LaptopModel = req.getParameter("iModel");
  LaptopServicetag = req.getParameter("iServiceTag");
  LaptopDatein = req.getParameter("iDatein");
  LaptopNotes = req.getParameter("iNotes");
  LaptopType = req.getParameter("iType");

  try {

    conn = DriverManager.getConnection(dbURL, user, pass);

    PreparedStatement st = conn.prepareStatement("INSERT INTO LaptopsTable (Make, Model,  [Service Tag], Datein, Notes, Type) VALUES (?,?,?,?,?,?)");
    st.setString(1, LaptopMake);
    st.setString(2, LaptopModel);
    st.setString(3, LaptopServicetag);
    st.setString(4, LaptopDatein);
    st.setString(5, LaptopNotes);
    st.setString(6, LaptopType);

    st.executeUpdate();

    //This is SWING - and would at best popup a Dialog ON YOUR SERVER
    //JOptionPane.showConfirmDialog(null, "Your Data Has been  Inserted", "Result", JOptionPane.DEFAULT_OPTION,
    //        JOptionPane.PLAIN_MESSAGE);

    //Alternative: Show some HTML.                
    %>
    <h1>Your Data has been inserted.</h1>
    <%

    st.close();
    conn.close();

  } catch (SQLException ex) {
    ex.printStackTrace();
  }


} //END of Method.equals("POST")
%>
    <div id="header">
    <div class="logo">
        <a href="#"><span> Resident Screening</span> Jinventory </a>
    </div>
</div>

<div id="container">
    <div class="content">
        <h1>Add New Laptop</h1>

        <p>Make sure all Service Tag Enter in here are Laptops</p>

        <div id="box">
            <form name="LaptopsForm" method="POST" class="contentfonts"
                action="" method="POST">
                <table>
                    <tbody>

                        <tr>
                            <td>Service Tag</td>
                            <td><input type="text" name="iServiceTag" size="40"></td>
                        </tr>
                        <tr>
                            <td>Make</td>
                            <td><input type="text" name="iMake" size="40"></td>
                        </tr>
                        <tr>
                            <td>Model</td>
                            <td><input type="text" name="iModel"></td>
                        </tr>
                        <tr>
                            <td>Date</td>
                            <td><input type="date" name="iDate"></td>
                        </tr>
                        <tr>
                            <td>Type</td>
                            <td><input type="text" name="iTyped"  Value="Laptop"
                                disabled="disabled"></td>
                        </tr>
                        <tr>
                            <td>Notes</td>
                            <td><input Type="text" name="iNotes" size="30" height="40"></td>
                        </tr>

                        <tr>
                            <td><input type="reset" name="Reset"></td>
                            <td><input type="submit" name="submit"></td>
                        </tr>
                    </tbody>
                </table>
            </form>
        </div>
    </div>
</div>
</body>
</html>

我正在尝试使用Java jsp将数据插入本地计算机的SQL数据库中

问题描述

1 个解决方案

解决方案1
0 2015-12-11 21:30:41

我正在尝试使用Java jsp将数据插入本地计算机的SQL数据库中

问题描述

1 个解决方案

解决方案1 0 2015-12-11 21:30:41

解决方案1
0 2015-12-11 21:30:41