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学生选课系统前后端分离 vue springboot

news 来源：原创 2024/5/18 23:29:21

学生选课系统前后端分离 vue springboot

系统描述
一、系统功能
二、系统截图
- 1.网络爬虫新闻获取代码
- 2.pom
源码

系统描述

基于spring boot vue的学生选课系统
前端：
Vue ElementUI axios
后端 springboot
持久层 mybatis Plus
会话 Spring Session +redis
日志 AOP MongoDB
数据库 MySQL
Redis:session 新闻配置信息
MongoDB 业务日志

一、系统功能

学生教师管理员三种登录
利用网络爬虫获取网站新闻信息显示在首页
管理员登录：专业管理班级管理学生管理教师管理课程管理选课管理管理员管理
学生登录：选修课程学生课程课表查询考试查询成绩查询信息维护
教师登录：授课查询教师课表成绩录入

二、系统截图

在这里插入图片描述

1.网络爬虫新闻获取代码

代码如下（示例）：

package com.mecol.select_course.manager;

import com.mecol.select_course.dao.redis.SdnuNewsDAO;
import com.mecol.select_course.model.bo.SdnuNewsBO;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@Component
public class SdnuNewsManager extends BaseManager {
    private static final int CRAWL_INTERVAL = 60 * 60 * 1000;
    private static final int CRAWL_TIMEOUT = 30 * 1000;
    private static final String CRAWL_TARGET_URL = "https://www.sdjtu.edu.cn/xxyw.htm";
    private static final String BASE_URL = "https://www.sdjtu.edu.cn/";

    private final SdnuNewsDAO sdnuNewsDAO;

    public SdnuNewsManager(SdnuNewsDAO sdnuNewsDAO) {
        this.sdnuNewsDAO = sdnuNewsDAO;
    }

    public List<SdnuNewsBO> getAllNews() {
        Map<String, String> map = sdnuNewsDAO.getAllNews();

        List<SdnuNewsBO> newsList = new ArrayList<>(map.size());
        for (String key : map.keySet()) {
            String value = map.get(key);
            // 2019/01/01http://host/path
            String date = value.substring(0, 10);
            String url = value.substring(10);
            newsList.add(new SdnuNewsBO(key, date, url));
        }

        return newsList;
    }
//定时任务 fixedDelay参数，传入一个以毫秒为单位的时间间隔
    @Scheduled(fixedDelay = CRAWL_INTERVAL)
    public void crawlNews() {
        Document pageDoc = fetchPage();
        if (pageDoc == null) {
            return;
        }

        List<SdnuNewsBO> newsList = parseNews(pageDoc);
        sdnuNewsDAO.clear();
        for (SdnuNewsBO news : newsList) {
            sdnuNewsDAO.addNews(news.getTitle(), news.getDate() + news.getUrl());
        }
    }

    private Document fetchPage() {
        Document doc = null;
        try {
            doc = Jsoup.parse(new URL(CRAWL_TARGET_URL), CRAWL_TIMEOUT);
        } catch (IOException ex) {
            ex.printStackTrace();
        }

        return doc;
    }

    private List<SdnuNewsBO> parseNews(Document pageDoc) {
        /*
        Elements elements = pageDoc.body()
                .getElementsByClass("TB3").get(0)
                .getElementsByTag("table").get(0)
                .getElementsByTag("tr");*/
        Elements elements=pageDoc.body().getElementsByClass("news_list").select("li");
       // System.out.println(elements);

        List<SdnuNewsBO> newsList = new ArrayList<>();
        for (Element element : elements) {
           // System.out.println(element);
            //if (!element.attr("id").startsWith("line")) {
           //     continue;
           // }

           // Element aTag = element.getElementsByTag("a").get(0);
            //Element dateTag = element.getElementsByTag("td").get(2);
            String url = BASE_URL +element.getElementsByTag("a").attr("href");
            String title = element.getElementsByTag("a").attr("title");
            String date1 = element.getElementsByClass("left_date").text();
            String date=date1.substring(1,date1.length()-1);
           // System.out.println(date);
            newsList.add(new SdnuNewsBO(title, date, url));
        }

        return newsList;
    }
}

2.pom

代码如下（示例）：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.mecol</groupId>
    <artifactId>selectcourse</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>selectcourse</name>
    <description>selectcourse</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.session</groupId>
            <artifactId>spring-session-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.12.1</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>