【JSP】JSP与oracle数据库交互案例

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****原文：blog.csdn.net/clark_xu  徐长亮的专栏

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本案例为咖啡销售情况录入查询系统

一、数据输入系统：

1.  设计输入信息页面

代码例如以下：

<html>

  <head>

   </head>

   

  <body>

   <center><H1>咖啡管理系统——录入系统</H1></center>

          欢迎来到录入系统<br />

         <form action="inputaction.jsp" method="post" name="form1" id="form1">

         <center>

咖啡名称:<input type="text" style="width:150px" name="cof_name" id="cof_name"><br />

供应商ID:<input type="text" style="width:150px" name="sup_id" id="sup_id"><br />

商品价格:<input type="text" style="width:150px" name="price" id="price"><br />

销售量:<input type="text" style="width:150px" name="sales" id="sales"><br />

总量:<input type="text" style="width:150px" name="total" id="total"><br />

    <input type="submit" value="提交数据">  

 </center> 

     </form>

  </body>

</html>

2. 设计处理oracle数据库输入请求网页inputaciton.jsp

（1）页面例如以下：

（2）数据库设计例如以下：

SQL> desc coffees;

 Name                                      Null?    Type

 ----------------------------------------- -------- ----------------------------

 COF_NAME                                       VARCHAR2(32)

 SUP_ID                                             NUMBER(38)

 PRICE                                              FLOAT(126)

 SALES                                              NUMBER(38)

 TOTAL                                              NUMBER(38)

（3）处理数据库输入代码例如以下：

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>

<%@ page

    import="java.sql.Connection"

 import="java.sql.ResultSet"

 import="java.sql.SQLException"

 import="java.sql.Statement"

 %>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>      </head>

 

  <body>

       <center><H1>咖啡管理系统——录入系统</H1></center>

          正在运行录入<br />

 <%

 

       Class.forName("oracle.jdbc.driver.OracleDriver");

    java.sql.DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

  

   String url = "jdbc:oracle:thin:@100.100.100.20:1521:dbsid2";

  String user="scott";

  String password="tiger";

  Connection con=java.sql.DriverManager.getConnection(url, user, password);

   //取得登录username

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

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

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

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

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

  String sql="insert into coffees values( '"+cof_name+"',"+sup_id+","+price+","+sales+","+total+")";

  Statement smt=con.createStatement();

        int rs=smt.executeUpdate(sql); 

  %>  

   录入成功 <br>

   <form action="output.jsp" name="form3" id="form3">

   <input type="submit" value="查询结果">

   </form>

  </body>

</html>

二、查询系统

1. 输入请求页面output.jsp

代码例如以下：

<html>

  <head>  </head>

   <body>

<center><H1>咖啡管理系统—查询系统</H1></center>

         <form action="action.jsp" method="post" name="form2" id="form2">

         <center>

咖啡名称:<input type="text" style="width:150px" name="cof_name_1" id="cof_name_1"><br />

<input type="submit" value="提交查询">   

           </center>

       </form>

  </body>

</html>

2.  查询请求的处理action.jsp

（1）查询结果页面

（2）处理数据库查询代码例如以下：

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>

<%@ page

    import="java.sql.Connection"

 import="java.sql.ResultSet"

 import="java.sql.SQLException"

 import="java.sql.Statement"

 %>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>  </head>

 

  <body>

  <center>

  <table border="1">

 <%

 

       Class.forName("oracle.jdbc.driver.OracleDriver");

    java.sql.DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

  

        String url = "jdbc:oracle:thin:@100.100.100.20:1521:dbsid2";

  String user="scott";

  String password="tiger";

  Connection con=java.sql.DriverManager.getConnection(url, user, password);

  

  

   //取得登录username

  String cof_name_1 = request.getParameter("cof_name_1");

//     String sql="select * from coffees where cof_name="+"'" +cof_name_1 +"'";

        String sql="select * from coffees where cof_name="+"'"+cof_name_1+"'";

  Statement smt=con.createStatement();

        ResultSet rs=smt.executeQuery(sql);

         while(rs.next()){

        String s1=rs.getString(1);

        int s2=rs.getInt(2);

        float s3=rs.getFloat(3);

        int s4=rs.getInt(4);      

        int s5=rs.getInt(5);

          %>

       

         <tr>

         <td><%=s1 %></td>

         <td><%=s2 %></td>

         <td><%=s3 %></td>

         <td><%=s4 %></td>

         <td><%=s5 %></td>

         </tr>

        <%} %>

       

       

 </table>

 查询成功 <br>

 </center>

  </body>

</html>