经过在网上对数据库和前段web界面的知识的学习，我终于知道怎么和数据库交互了
来，看代码，先看一下昨天选课的那个界面吧
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>提交作业</title> /*<style type="text/css"> body{ background: #FFFF00; align-items: center; text-align: center; } </style>*/ </head> <body> <body background="123.jpg"></body> <% String s=(String)request.getAttribute("Error"); if("".equals(s)||s==null) { s=""; } %> <%=s %> <form action="LoginInput.jsp" method="get"> <table align="center" border="1"> <tr> <td colspan="2"> 课程名称 <input type="text" name="name"/> </td> </tr> <tr> <td colspan="2"> 任课教师 <input type="text" name="teacher"/> </td> </tr> <tr> <td colspan="2"> 上课地点 <input type="text" name="place"/> </td> </tr> <tr> <td align="center" colspan="2"> <input type="submit" value="保存"/></td> </tr> </table> </form> </body> </html>
再看看和后台数据库交互的界面
<%@page import="com.jaovo.msg.dao.UserDaoImpl"%> <%@page import="com.jaovo.msg.model.User"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <% int i=0; boolean flag=true; boolean flag1=true; String s[]={"王建民","刘丹","刘立嘉","杨子光","王辉"}; String s1[]={"基教","一教","二教","三教"}; String name=request.getParameter("name"); String teacher=request.getParameter("teacher"); String place=request.getParameter("place"); while(i<s.length) { if(!s[i].equals(teacher)) { flag=false; } else { flag=true; break; } i++; }%> <% if(!flag) { request.setAttribute("Error", "老师不对"); %> <jsp:forward page="Login.jsp"></jsp:forward> <% } i=0; String s3=place.substring(0,2); while(flag==true&&i<s1.length) { if(!s1[i].equals(s3)) { flag1=false; } else { flag1=true; break; } i++; } if(!flag1) { request.setAttribute("Error", "教室不对"); %> <jsp:forward page="Login.jsp"></jsp:forward> <% } UserDaoImpl userdao=new UserDaoImpl(); User user=new User(); user.setName(name); user.setTeacher(teacher); user.setPlace(place); userdao.add(user); System.out.println(teacher); %> <<jsp:forward page="Login.jsp"></jsp:forward>
哈哈哈哈！！！我居然写出来一个web页面了。。我真厉害