java三方---->html解析jsoup的使用

时间:2023-09-27 10:13:32

  jsoup 是一款 Java 的HTML 解析器,可直接解析某个URL地址、HTML文本内容。它提供了一套非常省力的API,可通过DOM,CSS以及类似于JQuery的操作方法来取出和操作数据。今天我们就开始jsoup的学习。

jsoup解析html

jsoup的主要功能如下:

  • 从一个URL,文件或字符串中解析HTML;

  • 使用DOM或CSS选择器来查找、取出数据;

  • 可操作HTML元素、属性、文本;

jsoup测试项目的结构如下,首先要下载jsoup的jar包:https://jsoup.org/download

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" alt="" />

一、 JsoupTest中我们从网址、文件和字符串中解析html。

package com.huhx.jsoup;

import java.io.File;
import java.io.IOException; import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements; public class JsoupTest {
static String html = "<html><head><title>First parse</title></head>"
+ "<body><p id='parseHtml'><font>Parsed HTML into a doc.</font></p></body></html>"; static String fileName = "file/jsoup.html";
static String url = "http://www.baidu.com"; // 从url中解析
public static void readFromUrl(String url) {
try {
Document document = Jsoup.connect(url).get();
System.out.println(document.title());
} catch (IOException e) {
e.printStackTrace();
}
} // 从文件中解析
public static void readFromFile(String file) {
File input = new File(file);
try {
Document document = Jsoup.parse(input, "UTF-8", "");
System.out.println(document.getElementsByTag("p").text()); // 通过tag名得到元素
System.out.println(document.getElementById("divid").text()); // 通过id
System.out.println(document.getElementsByClass("divclass").attr("id")); // 通过class
System.out.println(document.getElementsByAttribute("href").attr("id")); // 通过属性 } catch (IOException e) {
e.printStackTrace();
}
} // 从字符串中解析
public static void readFromString(String string) {
Document document = Jsoup.parse(string);
Elements element = document.getElementsByTag("p");
System.out.println(element.text());
System.out.println(element.html());
System.out.println(element.attr("id"));
} public static void main(String[] args) {
readFromString(html);
System.out.println("------------------------------------------------------------");
readFromFile(fileName);
System.out.println("------------------------------------------------------------");
readFromUrl(url);
}
}

二、 jsoup.html的内容如下:

<!doctype html>
<html lang="en">
<head>
<title>Document</title>
</head>
<body>
<p>
<font>Hello World.</font>
</p>
<div id="divid">huhx div id</div>
<div class="divclass" id="divclassid">huhx div class</div>
<a href="http://huhx.com" id="huhx">Hello huhx</a>
</body>
</html>

三、运行结果如下:

Parsed HTML into a doc.
<font>Parsed HTML into a doc.</font>
parseHtml
------------------------------------------------------------
Hello World.
huhx div id
divclassid
huhx
------------------------------------------------------------
百度一下,你就知道

友情链接