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
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>
源码
https://pan.baidu.com/s/1dSsQWDx1psVAzYRJsnXzPQ 提取码: rfi2
转载：https://blog.csdn.net/m0_46108627/article/details/127428158
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