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java jsoup 爬蟲_java+jsoup實作簡單網絡爬蟲

package body;

import java.io.IOException;

import java.util.HashMap;

import java.util.List;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import javax.xml.ws.http.HTTPException;

import org.jsoup.Jsoup;

import org.jsoup.nodes.Document;

import org.jsoup.nodes.Element;

import org.jsoup.nodes.Node;

import org.jsoup.select.Elements;

public class MyMain {

static HashMap sendGet(HashMap oldHash) {

HashMap newHash = new HashMap();

String oldLine = "";

try {

for (java.util.Map.Entry mapping : oldHash.entrySet()) {

if (!mapping.getValue()) {

oldLine = mapping.getKey();

Document doc = Jsoup.connect(oldLine).get();

// TODO 頁面資訊查找

Element info;

if ((info = doc.getElementById("info")) != null) {

String title = doc.title();

System.out.println("httpUrl ----" + oldLine);

System.out.println("title ----" +title);

findMovieInfo(info);

} else {

Elements elements = doc.select("[href]");

for (Element element : elements) {

String newUrl = element.attr("href");

if (!oldHash.containsKey(newUrl) && !newHash.containsKey(newUrl))

if (newUrl.startsWith("http")) {

//                                    System.out.println(newUrl);

newHash.put(newUrl, false);

}

}

}

}

oldHash.replace(oldLine, false, true);

}

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (HTTPException eh) {

eh.printStackTrace();

}

if (!newHash.isEmpty()) {

oldHash.putAll(newHash);

oldHash.putAll(sendGet(oldHash));

}

return oldHash;

}

static void myRequest(String httpUrl) {

HashMap oldHash = new HashMap<>();

oldHash.put(httpUrl, false);

oldHash = sendGet(oldHash);

}

public static void findMovieInfo(Element element) {

Elements elements = element.children();

for (Element info : elements) {

if (info.childNodeSize() > 0) {

String key = info.getElementsByAttributeValue("class", "pl").text();

if (!key.isEmpty()) {

if ("導演".equals(key) || "編劇".equals(key) || "主演".equals(key)) {

String value = info.getElementsByAttributeValue("class", "attrs").text();

System.out.println(key + "----" + value);

} else if ("類型:".equals(key)) {

String value = element.getElementsByAttributeValue("property", "v:genre").text();

System.out.println(key + "----" + value);

} else if ("制片國家/地區:".equals(key)) {

Pattern patternCountry = Pattern.compile(".制片國家/地區:.+\n

");

Matcher matcherCountry = patternCountry.matcher(element.html());

if (matcherCountry.find()) {

String value = matcherCountry.group().split("")[1].split("

")[0].trim();

System.out.println(key + "----" + value);

}

} else if ("語言:".equals(key)) {

Pattern patternCountry = Pattern.compile(".語言:.+\n

");

Matcher matcherCountry = patternCountry.matcher(element.html());

if (matcherCountry.find()) {

String value = matcherCountry.group().split("")[1].split("

")[0].trim();

System.out.println(key + "----" + value);

}

} else if ("上映日期:".equals(key)) {

String value = element.getElementsByAttributeValue("property", "v:initialReleaseDate").text();

System.out.println(key + "----" + value);

} else if ("片長:".equals(key)) {

String value = element.getElementsByAttributeValue("property", "v:runtime").text();

System.out.println(key + "----" + value);

} else if ("又名:".equals(key)) {

Pattern patternCountry = Pattern.compile(".又名:.+\n

");

Matcher matcherCountry = patternCountry.matcher(element.html());

if (matcherCountry.find()) {

String value = matcherCountry.group().split("")[1].split("

")[0].trim();

System.out.println(key + "----" + value);

}

}

}

}

}

}

public static void main(String[] args) {

myRequest("https://movie.douban.com");

}

}