📄 class_select.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 'class_select.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>
<% int i=0;
String user_id=request.getParameter("user_id");
String sql1="select major,semester from student where s_id=?";
Connection con=test1.getConnection();
PreparedStatement ps1=con.prepareStatement(sql1);
ps1.setString(1,user_id);
ResultSet rs1=ps1.executeQuery();
rs1.next();
String major=rs1.getString(1);
int semester_id=rs1.getInt(2);
String checkbox_name[]={"1","2","3","4","5","6","7","8"};
//////////////////////////////////////////////////////////////////////////
String sql2="select course_arrangement.c_id,course.cname from course,course_arrangement where course_arrangement.major=? and course_arrangement.semester_id=? and course_arrangement.c_id=course.c_id and course.c_id not in(select c_id from selection where s_id=?)";
PreparedStatement ps2=con.prepareStatement(sql2);
ps2.setString(1,major);
ps2.setInt(2,semester_id);
ps2.setString(3,user_id);
ResultSet rs2=ps2.executeQuery();%>
<FORM action="student/update_selection.jsp" method="post">
<TABLE>
<tr>
<TH></TH>
<TH>课程号</TH>
<TH>课程名</TH>
</tr>
<%while(rs2.next()&&i<8){ %>
<TR>
<TD><INPUT type="checkbox" name="<%=checkbox_name[i]%>" value="<%=rs2.getString(1)%>"/></TD>
<TD><%=rs2.getString(1)%></TD>
<TD><%=rs2.getString(2)%></TD>
</TR>
<%
i++; }
%>
</TABLE>
<INPUT type="submit" value="提交">
<INPUT type="reset" value="重置">
<input type="hidden" name="user_id" value=<%=user_id%> >
</FORM>
</body>
</html>
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