NaturePhysicsProcessor.java
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package com.canrd.webmagic.processor;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.canrd.webmagic.common.utils.DateUtil;
import com.canrd.webmagic.common.utils.StringUtils;
import com.canrd.webmagic.domain.ArticleTypeEnum;
import com.canrd.webmagic.domain.dto.ArticleDO;
import com.canrd.webmagic.processor.pipeline.ArticlePipeline;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import us.codecraft.webmagic.Page;
import us.codecraft.webmagic.Site;
import us.codecraft.webmagic.Spider;
import us.codecraft.webmagic.processor.PageProcessor;
import us.codecraft.webmagic.selector.Html;
import us.codecraft.webmagic.selector.Selectable;
import us.codecraft.webmagic.selector.XpathSelector;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.stream.Collectors;
@Slf4j
@Component
public class NaturePhysicsProcessor implements PageProcessor{
@Override
public void process(Page page) {
String url = page.getUrl().get();
if (url.equals("https://www.nature.com/nphys/")) {
everyPage(page);
}else if (url.contains("https://www.nature.com/")){
doArticleContent(page);
}
}
@Override
public Site getSite() {
return PageProcessor.super.getSite();
}
public void everyPage(Page page){
List<String> all = page.getHtml().xpath("//div[@class='u-flex-direction-column']/h3/a//@href").all();
for (int i = 0; i < all.size(); i++) {
page.addTargetRequest("https://www.nature.com/"+all.get(i));
}
}
private void doArticleContent(Page page) {
Html html = page.getHtml();
String articleCode = page.getUrl().get();
Selectable headSelectable = html.xpath("//div[@class='c-article-header']/header");
List<Selectable> authorEmailSelectables = html.xpath("//p[@id='corresponding-author-list']/a").nodes();
Selectable referencesSelectable = html.xpath("//ol[@class='c-article-references']").select(new XpathSelector("li[@class='c-article-references__item js-c-reading-companion-references-item']"));
Selectable authorAddressSelectable = html.xpath("//ol[@class='c-article-author-affiliation__list']").select(new XpathSelector("li"));
String title = headSelectable.xpath("//div/h1/text()").get();
if (StringUtils.isBlank(title)) {
title = headSelectable.xpath("//h1/text()").get();
}
String articleDesc = html.xpath("//div[@class='c-article-section__content']/p/text()").get();
String publishTime;
Date publishTimeDateTime = null;
try {
publishTime = headSelectable.xpath("//ul").nodes().get(0).xpath("//li").nodes().get(2).xpath("//li/time/text()").get();
} catch (Exception e) {
try {
publishTime = headSelectable.xpath("//ul").nodes().get(0).xpath("//li").nodes().get(1).xpath("//li/time/text()").get();
} catch (Exception e1) {
publishTime = headSelectable.xpath("//ul").nodes().get(0).xpath("//li").nodes().get(0).xpath("//li/time/text()").get();
}
}
SimpleDateFormat formatter = new SimpleDateFormat("dd MMMM yyyy", Locale.ENGLISH);
try {
publishTimeDateTime = formatter.parse(publishTime);
} catch (ParseException e) {
e.printStackTrace();
}
Selectable authorSelectable = headSelectable.xpath("//ul").nodes().get(1).select(new XpathSelector("li[@class='c-article-author-list__item']"));
List<Selectable> authorNodes = authorSelectable.nodes();
StringBuffer authorName = new StringBuffer();
for (Selectable node : authorNodes) {
authorName.append(node.xpath("//a/text()"));
}
JSONArray authorAddress = new JSONArray();
List<Selectable> authorAddressList = authorAddressSelectable.nodes();
if (CollectionUtils.isNotEmpty(authorAddressList)) {
for (Selectable selectable : authorAddressList) {
String address = selectable.xpath("//p").xpath("//p[@class='c-article-author-affiliation__address']/text()").get();
String authorNames = selectable.xpath("//p").xpath("//p[@class='c-article-author-affiliation__authors-list']/text()").get();
JSONObject object = new JSONObject();
object.put("address", address);
object.put("authorNames", authorNames);
authorAddress.add(object);
}
}
JSONArray references = new JSONArray();
List<Selectable> referenceList = referencesSelectable.nodes();
if (CollectionUtils.isNotEmpty(referenceList)) {
for (Selectable reference : referenceList) {
String referenceTitle = reference.xpath("//p").xpath("//p[@class='c-article-references__text']/text()").get();
List<Selectable> referenceLinks = reference.xpath("//p").xpath("//p[@class='c-article-references__links u-hide-print']").links().nodes();
List<String> links = new ArrayList<>();
if (CollectionUtils.isNotEmpty(referenceLinks)) {
links = referenceLinks.stream().map(x -> x.get()).collect(Collectors.toList());
}
JSONObject object = new JSONObject();
object.put("referenceTitle", referenceTitle);
object.put("links", links);
// if (CollectionUtils.isNotEmpty(links)) {
// page.addTargetRequests(links.stream().filter(x -> x.contains("nature")).collect(Collectors.toList()));
// }
references.add(object);
}
}
JSONArray authorEmail = new JSONArray();
for (Selectable authorEmailSelectable : authorEmailSelectables) {
String[] split = authorEmailSelectable.xpath("//a").links().get().split(":");
String email = Objects.isNull(split) ? "" : split[split.length - 1];
String authorEmailName = authorEmailSelectable.xpath("//a/text()").get();
JSONObject jsonObject = new JSONObject();
jsonObject.put("authorEmailName", authorEmailName);
jsonObject.put("email", email);
authorEmail.add(jsonObject);
}
log.info("文章链接：{},发布时间:{},标题:{},作者:{},邮箱信息:{}", articleCode, publishTime, title, authorEmail.toJSONString());
page.putField("article", ArticleDO.builder()
.articleType(ArticleTypeEnum.NATURE_PHYSICS.getType())
.articleCode(articleCode)
.authorName(authorName.toString())
.title(title)
.publishTime(Objects.isNull(publishTimeDateTime) ? publishTime : DateUtil.format(publishTimeDateTime, DateUtil.DATE))
.emailInfo(authorEmail.toJSONString())
.articleDesc(articleDesc)
.authorAddress(authorAddress.toJSONString())
.referenceInfo(references.toJSONString()).build());
}
public static void main(String[] args) {
Spider.create(new MatterPagePcoessor())
.addUrl("https://www.nature.com/nenergy/research-articles")
.addPipeline(new ArticlePipeline())
.thread(1).run();
}
}