Spring Boot集成rss快速入门demo

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1.什么是rss？

RSS 的全称是「简易内容聚合」（Really Simple Syndication），是一个能让你在一个地方订阅各种感兴趣网站的工具。

一个网站支持 RSS，就意味着每当它新发布一篇新文章，就会往一个位于特定网址的文件中，以特定的语法（具体而言是 XML 标记语言或 JSON）增加一条记录，列明这篇文章的标题、作者、发表时间和内容（可以是全文，也可以是摘要）等信息。这样，用户只要搜集所有他感兴趣的网站提供的这种文件的网址，并不时检查这些文件内容的更新，就能知道这些网站是否、何时发布了什么内容。RSS 阅读器的核心功能，就是存储用户订阅的 RSS 地址，以固定的频率自动检查更新，并将其内容转换为易读的格式呈现给用户。

为什么用 RSS

RSS 的对立面是算法推荐，像微信公众号、知乎、微博、今日头条等平台。且不说算法推送平台广告多，迁移麻烦的问题。算法推荐的特点是，你不需要刻意选择，算法会根据你的喜好，给你推送内容。这样一来，你几乎没有选择的余地，在不断被「喂饱」中逐渐失去判断的能力。更可怕的地方在于，它替你定义了你的画像，然后把你潜移默化中变成了它所认为的你。「大数据杀熟」的东窗事发绝非偶然，用算法窥视用户隐私是当今互联网公司的通配。

做信息的主人，而不是奴隶。RSS 是一种公开的协议，可自由更换平台与客户端。重要的一点是，获取信息的权力完全自治。RSS 相比算法推荐，拥有了可控性和安全感，隐私完全掌握在自己手里。

什么是atom？

Atom是一对彼此相关的标准。Atom供稿格式（Atom Syndication Format）是用于网站消息来源，基于XML的文档格式；而Atom出版协定（Atom Publishing Protocol，简称AtomPub或APP）是用于新增及修改网络资源，基于HTTP的协议。

它借鉴了各种版本RSS的使用经验，被许多的聚合工具广泛使用在发布和使用上。Atom供稿格式设计作为RSS的替代品；而Atom出版协定用来取代现有的多种发布方式（如Blogger API和LiveJournal XML-RPC Client/Server Protocol）。而值得一提的是Google提供的多种服务正在使用Atom。Google Data API（GData）亦基于Atom。

Atom是IETF的"建议标准"，Atom供稿格式列为RFC 4287，而Atom出版协定列为RFC 5023。

2.代码工程

实验目标：实现rss和atom订阅源

pom.xml

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><artifactId>springboot-demo</artifactId><groupId>com.et</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>rss</artifactId><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-autoconfigure</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!--ROAM依赖  RSS 订阅--><dependency><groupId>com.rometools</groupId><artifactId>rome</artifactId><version>1.15.0</version></dependency><!-- https://mvnrepository.com/artifact/com.rometools/rome-utils --><dependency><groupId>com.rometools</groupId><artifactId>rome-utils</artifactId><version>1.15.0</version></dependency><dependency><groupId>org.jdom</groupId><artifactId>jdom2</artifactId><version>2.0.6</version></dependency></dependencies>
</project>

controller

采用rome库实现rss和atom订阅

package com.et.rss.controller;import com.rometools.rome.feed.atom.*;
import com.rometools.rome.feed.rss.Channel;
import com.rometools.rome.feed.rss.Description;
import com.rometools.rome.feed.rss.Image;
import com.rometools.rome.feed.rss.Item;
import com.rometools.rome.feed.synd.SyndPerson;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Collections;
import java.util.Date;@RestController
@RequestMapping("/feed")
public class FeedController {@GetMapping(path = "/rss")public Channel rss() {Channel channel = new Channel();channel.setFeedType("rss_2.0");channel.setTitle("HBLOG Feed");channel.setDescription("Recent posts");channel.setLink("http://www.liuhaihua.cn");channel.setUri("http://www.liuhaihua.cn");channel.setGenerator("Harries");Image image = new Image();image.setUrl("http://www.liuhaihua.cn/img/hblog.png");image.setTitle("HBLOG Feed");image.setHeight(32);image.setWidth(32);channel.setImage(image);Date postDate = new Date();channel.setPubDate(postDate);Item item = new Item();item.setAuthor("Harries");item.setLink("http://www.liuhaihua.cn/archives/710608.html");item.setTitle("Spring Boot integrated banner   quick start demo");item.setUri("http://www.liuhaihua.cn/archives/710608.html");item.setComments("http://www.liuhaihua.cn/archives/710608.html#commnet");com.rometools.rome.feed.rss.Category category = new com.rometools.rome.feed.rss.Category();category.setValue("CORS");item.setCategories(Collections.singletonList(category));Description descr = new Description();descr.setValue("pring Boot Banner is a feature for displaying custom ASCII art and information at application startup. This ASCII art usually includes the project name, version number, author information");item.setDescription(descr);item.setPubDate(postDate);channel.setItems(Collections.singletonList(item));//Like more Entries here about different new topicsreturn channel;}@GetMapping(path = "/atom")public Feed atom() {Feed feed = new Feed();feed.setFeedType("atom_1.0");feed.setTitle("HBLOG");feed.setId("http://www.liuhaihua.cn");Content subtitle = new Content();subtitle.setType("text/plain");subtitle.setValue("recents post");feed.setSubtitle(subtitle);Date postDate = new Date();feed.setUpdated(postDate);Entry entry = new Entry();Link link = new Link();link.setHref("http://www.liuhaihua.cn/archives/710608.html");entry.setAlternateLinks(Collections.singletonList(link));SyndPerson author = new Person();author.setName("HBLOG");entry.setAuthors(Collections.singletonList(author));entry.setCreated(postDate);entry.setPublished(postDate);entry.setUpdated(postDate);entry.setId("710608");entry.setTitle("Spring Boot integrated banner   quick start demo");Category category = new Category();category.setTerm("CORS");entry.setCategories(Collections.singletonList(category));Content summary = new Content();summary.setType("text/plain");summary.setValue("Spring Boot Banner is a feature for displaying custom ASCII art and information at application startup. This ASCII art usually includes the project name, version number, author information");entry.setSummary(summary);feed.setEntries(Collections.singletonList(entry));//add different topicreturn feed;}}

DemoApplication.java

package com.et.rss;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
public class DemoApplication {public static void main(String[] args) {SpringApplication.run(DemoApplication.class, args);}
}

application.yaml

server:port: 8088

以上只是一些关键代码，所有代码请参见下面代码仓库

代码仓库

GitHub - Harries/springboot-demo: a simple springboot demo with some components for example: redis,solr,rockmq and so on.

3.测试

启动Spring Boot应用

rss

http://127.0.0.1:8088/feed/rss

<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"><channel><title>HBLOG Feed</title><link>http://www.liuhaihua.cn</link><description>Recent posts</description><pubDate>Fri, 24 May 2024 14:26:21 GMT</pubDate><generator>Harries</generator><image><title>HBLOG Feed</title><url>http://www.liuhaihua.cn/img/hblog.png</url><width>32</width><height>32</height></image><item><title>Spring Boot integrated banner   quick start demo</title><link>http://www.liuhaihua.cn/archives/710608.html</link><description>pring Boot Banner is a feature for displaying custom ASCII art and information at application startup. This ASCII art usually includes the project name, version number, author information</description><category>CORS</category><pubDate>Fri, 24 May 2024 14:26:21 GMT</pubDate><author>Harries</author><comments>http://www.liuhaihua.cn/archives/710608.html#commnet</comments></item></channel>
</rss>

atom

http://127.0.0.1:8088/feed/atom

<?xml version="1.0" encoding="UTF-8"?>
<feed xmlns="http://www.w3.org/2005/Atom"><title>HBLOG</title><subtitle type="text">recents post</subtitle><id>http://www.liuhaihua.cn</id><updated>2024-05-24T14:25:38Z</updated><entry><title>Spring Boot integrated banner   quick start demo</title><link rel="alternate" href="http://www.liuhaihua.cn/archives/710608.html" /><category term="CORS" /><author><name>HBLOG</name></author><id>710608</id><updated>2024-05-24T14:25:38Z</updated><published>2024-05-24T14:25:38Z</published><summary type="text">Spring Boot Banner is a feature for displaying custom ASCII art and information at application startup. This ASCII art usually includes the project name, version number, author information</summary></entry>
</feed>