java jsoup爬取动态网页_java通过Jsoup爬取网页过程详解

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

org.jsoup

jsoup

1.10.3

org.apache.httpcomponents

httpclient

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://www.cnblogs.com/");//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脚本之家。

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 org.jsoup jsoup 1.10.3 org.apache.httpcomponents httpclient 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://www.cnblogs.com/");//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脚本之家。