简单学生选课系统之学分汇总

ScDao.java

 public ResultSet selectcredit(){
    	   ResultSet rst=null;
    	   Coon coona=new Coon();
    	   Connection coonn=coona.getCoon();
    	   String sql="select scno,sno,sname from sc group by sno having sum(ccredit)<15";
    	   try {
			PreparedStatement pst=coonn.prepareStatement(sql);
			rst=pst.executeQuery();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	   return rst;
       }

queryStudent.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ page import="java.sql.*" %>
    <%@ page import="nuc.select.Dao.*" %>










<%
    request.setCharacterEncoding("utf-8");
	ScDao sc=new ScDao();
	 ResultSet rs=sc.selectcredit();
	 if(rs!=null){
	%>
	
	<%
	    while(rs.next()){	
	%>
	
	<%
	    }
	     }else{
	    	 out.println("没有学分不够的学生！");
	     }
	%>
	

	
学分不够的情况
	
班级
学号
姓名

	
<%=rs.getString("scno") %>
	
<%=rs.getString("sno") %>
	
<%=rs.getString("sname") %>