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JSP 数据库问题 - Java / Web 开发

大侠们帮我看看为什么填入表单的数据不能插入数据库
另一个页面能读出里面的数据
<%@ page language="java" contentType="text/html; charset=GBK"%>
<%@ page import="java.sql.*,javax.naming.*,javax.sql.*" %>
<html>
  <head>  
  <title>创建表并插入及修改数据</title>
  </head>  
  <body>
<%String Student_id= request.getParameter("Student_id");
String Student_name= request.getParameter("Student_name");
String sex= request.getParameter("sex");
String Student_class= request.getParameter("Student_class");
String Student_grade=request.getParameter("Student_grade");
  Connection con = null;
try {

// 加载ODBC驱动
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
// 通过驱动管理器(DriverManager)获得连接
con = DriverManager.getConnection("jdbc:odbc:mysj",
"sa","123");
out.println("<h2>创建student表成功!</h2><br>");
// 插入数据到student表
String Sql="insert into student(Student_id,Student_name,sex,Student_class,"  
  + "Student_grade) values ('" + Student_id + "','"
  + Student_name+"','&q


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