jsp中下拉菜单显示数据库里的内容

迷南。 2022-02-17 01:25 251阅读 0赞

<%@page import="java.sql.*"%>
    <%@page import="java.sql.ResultSet"%>
    <%@page import="com.wdq.Utils.ConnectionMySql"%>
    <%@page import="java.sql.Connection"%>
    <%@page import="java.util.ArrayList"%>
    <%@page import="java.util.List"%>
    <%@page import="com.wdq.Users.*"%>
    <%@ page language="java" contentType="text/html; charset=UTF-8"
    	pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <link href="css/form_style.css" rel='stylesheet' type='text/css' />
    </head>
    <body>
       <%
       List<Students> studentList = new ArrayList<>();//创建List集合接收数据库数据
       Connection con = new com.wdq.Utils.ConnectionMySql().getCon(); //获取数据库连接返回的Connection对象
       ResultSet rs = null;//存放的结果集
       Statement pstmt  = null;
       pstmt = con.createStatement();
       String sql = "select * from student";//执行查询的Sql语句
       try{
    	   rs = pstmt.executeQuery(sql);
    	   while(rs.next()){
    		   Students student = new Students();
    		   student.setId(rs.getInt(1));
    		   student.setStuId(rs.getString(2));
    		   student.setStuName(rs.getString(3));
    		   student.setGender(rs.getString(4));
    		   student.setBalance(rs.getFloat(5));
    		   student.setTel(rs.getString(6));
    		   student.setMajor(rs.getString(7));
    		   studentList.add(student);
    	   }
       }catch(Exception e){
    	   System.err.print("查询失败!\n");
       }
       
       %>
        <li>
        <label>请选择学生</label>
        <select name="studentId">
        <%
        int len = studentList.size();
        for(int i=0;i<len;i++){ %>
        <option><%=studentList.get(i).getStuName() %></option>
        <% }%>
        </select>
        </li>
        </body>