JavaWeb jsp+servlet+jdbc 开发的学生选课管理系统
JavaWeb jsp+servlet+jdbc 开发的学生选课管理系统
- 基于jsp+servlet+jdbc写的一个简单的学生选课管理系统
-
- 学生选课信息的界面
- 登陆成功界面
- 主要增删改逻辑代码
-
- 数据库设计
- 总结
基于jsp+servlet+jdbc写的一个简单的学生选课管理系统
这学期刚刚学完javaweb于是期末的时间大作业边做了一个学生选课系统
技术选型：
1.Web容器：Tomca
2.编程语言：java
3.数据库连接池：Druid
4.数据库操作：DBUtils
5.网页设计：jsp
6.静态网页html+css+javascript
7.数据库：MySql8.0.2
8.操作系统：win10
学生选课信息的界面
这个是登陆界面 处理登录的主要业务代码如下
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.liyuan.pojo.Admin;
import com.liyuan.service.AdminService;
import com.liyuan.service.impl.AdminServiceImpl;
import com.liyuan.utils.CookieUtils;
/**
* Servlet implementation class LoginServlet
*/
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private AdminService adminService = new AdminServiceImpl();
/**
* @see HttpServlet#HttpServlet()
*/
public LoginServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//获取用户输入的账号密码
String username = request.getParameter("username");
String password = request.getParameter("password");
Admin admin = adminService.login(username, password);
if(admin!=null) {
HttpSession session = request.getSession();
session.setAttribute("user", admin);
session.setAttribute("nowTime", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
//保存登陆账号密码
CookieUtils.addCookie("cookie_username_password",request,response,7*24*60*60,username,password);
request.getRequestDispatcher("IndexServlet").forward(request, response);
}else {
//登陆失败
request.setAttribute("msg","账号或密码错误！");
request.setAttribute("username", username);
request.getRequestDispatcher("login.jsp").forward(request, response);
}
}
}
登陆成功界面
左侧列表可以对不同的信息进行管理 上图
选课
课程
主要增删改逻辑代码
package com.liyuan.web;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.liyuan.pojo.Course;
import com.liyuan.service.CourseService;
import com.liyuan.service.impl.CourseServiceImpl;
/**
* Servlet implementation class CourseBuildServlet
*/
public class CourseBuildServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
CourseService courService = new CourseServiceImpl();
/**
* @see HttpServlet#HttpServlet()
*/
public CourseBuildServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//static/html/admin-list.jsp
//获取参数
String action = request.getParameter("action");
System.out.println("action:"+action);
if(action.equals("list")) {
//
getAll(request, response);
}
//回传参数sava
else if(action.equals("save")) {
//获取回传参数
String coursename = request.getParameter("coursename");
Integer tid = Integer.parseInt(request.getParameter("tid"));
//设置添加 修改
String value = request.getParameter("flagvalue");
System.out.println("falgvalue:"+value);
Course course = new Course(coursename,tid);
//判断是添加还是修改
if(value.equals("添加")) {
//判断是否添加过
if(courService.existsCourse(coursename,tid)) {
request.setAttribute("msg", "当前课程已经添加了!");
request.getRequestDispatcher("static/html/courseAdd.jsp").forward(request, response);
}else {
//判断
request.setAttribute("flag", true);
int count = courService.addCourse(course);
System.out.println("count:"+count);
if(count>0) {
request.setAttribute("msg", "添加成功！");
request.getRequestDispatcher("static/html/courseAdd.jsp").forward(request, response);
}else {
request.setAttribute("msg", "添加失败！");
request.getRequestDispatcher("static/html/courseAdd.jsp").forward(request, response);
}
}
}else if(value.equals("修改")) {
Course newCourse = courService.getOne(coursename);
newCourse.setTid(tid);
System.out.println("newCourse:"+newCourse );
int count = courService.update(newCourse);
System.out.println(count);
if(count>0) {
request.setAttribute("msg", "修改成功！");
request.getRequestDispatcher("static/html/courseAdd.jsp").forward(request, response);
}else {
request.setAttribute("msg", "修改失败！");
request.setAttribute("course", course);
request.getRequestDispatcher("static/html/courseAdd.jsp").forward(request, response);
}
}
}
//回传参数addCourse
else if(action.equals("addCourse")) {
request.setAttribute("flag", true);
request.getRequestDispatcher("static/html/courseAdd.jsp").forward(request, response);
}
//回传参数delete
else if(action.equals("delete")) {
Integer courseid = Integer.parseInt(request.getParameter("courseid"));
courService.deleteById(courseid);
getAll(request, response);
}
//回传参数update
else if(action.equals("update")) {
Integer courseid = Integer.parseInt(request.getParameter("courseInfor"));
Course course = courService.getOne(courseid);
if(course!=null) {
//将获取到的course对象存储到request域对象中 然后在courseAdd.jsp页面中 用于修改界面的数据回传
request.setAttribute("course", course);
request.setAttribute("readonly","readonly");
request.getRequestDispatcher("static/html/courseAdd.jsp").forward(request, response);
}
}
//回传参数searchByTid
else if(action.equals("searchByTid")) {
Integer tid = Integer.parseInt(request.getParameter("tid"));
System.out.println("tid"+tid);
List list = courService.getAllCourse(tid);
request.setAttribute("list", list);
request.getRequestDispatcher("static/html/admin-list.jsp").forward(request, response);
}
}
//提取的获取学生列表方法
private void getAll(HttpServletRequest request, HttpServletResponse response) {
List list = courService.getAllCourse();
request.setAttribute("list", list);
try {
request.getRequestDispatcher("static/html/admin-list.jsp").forward(request, response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
对应的jsp页面代码
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":" +
request.getServerPort() + path + "/";
%>
欢迎页面-L-admin1.0
数据库设计
创建数据库 学生表
CREATE DATABASE StudentTeacher;
USE StudentTeacher;
DROP TABLE Student;
CREATE TABLE Student(
stuid INT PRIMARY KEY AUTO_INCREMENT,
stuname VARCHAR(20) NOT NULL,
stugender VARCHAR(2) NOT NULL DEFAULT('男'),
stunum VARCHAR(20) UNIQUE,
stupassword VARCHAR(30) NOT NULL
);
DESC Student;
创建教师表
CREATE TABLE Teacher(
tid INT PRIMARY KEY AUTO_INCREMENT,
tname VARCHAR(20) NOT NULL,
tnum VARCHAR(20) UNIQUE,
tpassword VARCHAR(30) NOT NULL
);
ALTER TABLE teacher ADD tgender VARCHAR(2) DEFAULT('男');
创建管理员表
CREATE TABLE Admin(
id INT PRIMARY KEY AUTO_INCREMENT,
`name` VARCHAR(20) NOT NULL,
username VARCHAR(20) UNIQUE,
`password` VARCHAR(30) NOT NULL
);
创建course表
CREATE TABLE Course(
courseid INT PRIMARY KEY AUTO_INCREMENT,
coursename VARCHAR(20),
tid INT,
enabled ENUM('0','1') DEFAULT '1',
FOREIGN KEY (tid) REFERENCES Teacher(tid),
CHECK (enabled=1 OR enabled=2)
);
DESC Course;
创建选课信息表
CREATE TABLE SC_Information(
scid INT,
stuid INT,
stuname VARCHAR(20),
courseid INT,
coursename VARCHAR(20),
score int，
FOREIGN KEY (stuid) REFERENCES student(stuid),
FOREIGN KEY (courseid) REFERENCES course(courseid ),
);
总结
1.emmmmm 目前我才大二会的也不是很多 不足之处请大家多多指正欢迎大家评论。。。完整的代码我放到百度云盘了 链接：学生选课管理系统
提取码：lynb
四个模块的代码基本逻辑都是一样的，只要会一个剩下的基本都会写了 所以我只写了选课表的增删改差 剩下的课程教师学生只写了个查询列表的功能 。。。。好了这个学期学的还是可以的，希望本文能对大家有点帮助。。。。加油！