山河浪漫，
人间温暖。

引入jar包

<!-- https://mvnrepository.com/artifact/rsslibj/rsslibj -->
<dependency>
	<groupId>rsslibj</groupId>
	<artifactId>rsslibj</artifactId>
	<version>1.0RC2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/exml/exml -->
<dependency>
	<groupId>exml</groupId>
	<artifactId>exml</artifactId>
	<version>7.0</version>
</dependency>

生成rss

package cn.sky.biz.controller;

import cn.sky.biz.entity.SysArticle;
import cn.sky.biz.service.ArticleService;
import cn.sky.common.constants.CommonConstant;
import cn.sky.common.controller.BaseController;
import com.rsslibj.elements.Channel;
import io.swagger.annotations.Api;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;

import static org.springframework.web.context.request.RequestContextHolder.getRequestAttributes;

/**
 * @author sky
 * @date 2021/1/20
 */
@RestController
@RequestMapping(CommonConstant.BASE_API)
@Api(value = "RssController", tags = {"Rss订阅"})
public class RssController extends BaseController {

    @Autowired
    private ArticleService articleService;

    @GetMapping("/rss")
    public void rss() {
        articleService.list();
        Channel channel = new Channel();
        channel.setDescription("纵使前方无晴日，任风雨，路迢迢");
        channel.setLink("https://www.wanglingyue.com");
        channel.setTitle("Sky blog");
        List articles = articleService.list();
        Iterator it = articles.iterator();
        while(it.hasNext()) {
            SysArticle article = (SysArticle)it.next();
            channel.addItem("https://wanglingyue.com/archives/"+article.getId(),
                    article.getContent(), article.getTitle()
            );
        }
        getResponse().setContentType("text/xml");
        getResponse().setCharacterEncoding("utf-8");
        try {
            PrintWriter pw = getResponse().getWriter();
            pw.print(channel.getFeed("2.0"));
            pw.close();
        }catch (Exception e){
            e.printStackTrace();
        }

    }
    public static HttpServletResponse getResponse() {
        return ((ServletRequestAttributes) getRequestAttributes()).getResponse();
    }
}