📄 update_db.jsp
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<%@ page language="java" import="java.sql.*" contentType="text/html;charset=gb2312"%>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'update_db.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<jsp:useBean id="test1" scope="application" class="test.Connect_db"/>
<body>
<%
String user_id=request.getParameter("user_id");
Connection con=test1.getConnection();
String name=request.getParameter("name");
String dept=request.getParameter("dept");
String phone=request.getParameter("phone");
String new_name=new String(name.getBytes("ISO-8859-1"),"gb2312");
String new_dept=new String(dept.getBytes("ISO-8859-1"),"gb2312");
String new_phone=new String(phone.getBytes("ISO-8859-1"),"gb2312");
String sql="update teacher set name=?,dept=?,phone=? where t_id=?";
PreparedStatement ps=con.prepareStatement(sql);
ps.setString(1,new_name);
ps.setString(2,new_dept);
ps.setString(3,new_phone);
ps.setString(4,user_id);
ps.executeUpdate();
con.close();
out.print("更新成功。");
%>
</body>
</html>
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