这篇文章主要介绍了java通过Jsoup爬取网页过程详解,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

一，导入依赖

<!--java爬虫--> <dependency> <groupId>org.jsoup</groupId> <artifactId>jsoup</artifactId> <version>1.10.3</version> </dependency> <!--httpclient依赖--> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> </dependency>

二，编写demo类

注意不要导错包了,是org.jsoup.nodes下面的

package com.taotao.entity;import org.apache.http.HttpEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.util.EntityUtils;import org.jsoup.Jsoup;import org.jsoup.nodes.Document;import org.jsoup.nodes.Element;import org.jsoup.select.Elements;import java.io.IOException;/** * Author: TaoTao 2019/9/26 */public class intefaceTest { public static void main(String[] args) throws IOException { CloseableHttpClient httpClient = HttpClients.createDefault();//创建httpClient HttpGet httpGet = new HttpGet("http:///");//创建httpget实例 CloseableHttpResponse response = httpClient.execute(httpGet);//执行get请求 HttpEntity entity = response.getEntity();//获取返回实体 String content = EntityUtils.toString(entity,"utf-8");//网页内容 response.close();//关闭流和释放系统资源 Jsoup.parse(content); Document doc = Jsoup.parse(content);//解析网页得到文档对象 Elements elements = doc.getElementsByTag("title");//获取tag是title的所有dom文档 Element element = elements.get(0);//获取第一个元素 String title = element.text(); //.html是返回html System.out.println("网页标题："+title); Element element1 = doc.getElementById("site_nav_top");//获取id=site_nav_top标签 String str = element1.text(); System.out.println("str:"+str); }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。