下面的示例将HTML解析为Document对象后，使用addClass或removeClass方法来增加或删除class类方法。
Document document=Jsoup.parse(html);
Element link=document.select("a").first();
link.attr("href","www.yahoo.com");
link.addClass("header");
link.removeClass("header");
元素对象代表dom元素，并提供了各种获取dom元素属性的方法。
addClass/removeClass示例
使用您选择的任何编辑器在C:/> jsoup中创建以下Java程序。
JsoupTester.java
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
public class JsoupTester {
public static void main(String[] args) {
String html = "<html><head><title>Sample Title</title></head>"
+ "<body>"
+ "<p>Sample Content</p>"
+ "<div id='sampleDiv'><a id='googleA' href='www.google.com'>Google</a></div>"
+ "<div class='comments'><a href='www.sample1.com'>Sample1</a>"
+ "<a href='www.sample2.com'>Sample2</a>"
+ "<a href='www.sample3.com'>Sample3</a><div>"
+"</div>"
+ "<div id='imageDiv' class='header'><img name='google' src='google.png' />"
+ "<img name='yahoo' src='yahoo.jpg' />"
+"</div>"
+"</body></html>";
Document document = Jsoup.parse(html);
//示例：设置属性
Element link = document.getElementById("googleA");
System.out.println("Outer HTML Before Modification :" + link.outerHtml());
link.attr("href","www.yahoo.com");
System.out.println("Outer HTML After Modification :" + link.outerHtml());
System.out.println("---");
//示例：addClass
Element div = document.getElementById("sampleDiv");
System.out.println("Outer HTML Before Modification :" + div.outerHtml());
link.addClass("header");
System.out.println("Outer HTML After Modification :" + div.outerHtml());
System.out.println("---");
//示例：removeClass
Element div1 = document.getElementById("imageDiv");
System.out.println("Outer HTML Before Modification :" + div1.outerHtml());
div1.removeClass("header");
System.out.println("Outer HTML After Modification :" + div1.outerHtml());
System.out.println("---");
//示例：批量更新
Elements links = document.select("div.comments a");
System.out.println("Outer HTML Before Modification :" + links.outerHtml());
links.attr("rel", "nofollow");
System.out.println("Outer HTML Before Modification :" + links.outerHtml());
}
}
使用 javac 编译器编译类，如下所示:
C:\jsoup>javac JsoupTester.java
现在运行JsoupTester以查看输出。
C:\jsoup>java JsoupTester
查看输出。
Outer HTML Before Modification :<a id="googleA" href="www.google.com">Google</a> Outer HTML After Modification :<a id="googleA" href="www.yahoo.com">Google</a> --- Outer HTML Before Modification :<div id="sampleDiv"> <a id="googleA" href="www.yahoo.com">Google</a> </div> Outer HTML After Modification :<div id="sampleDiv"> <a id="googleA" href="www.yahoo.com" class="header">Google</a> </div> --- Outer HTML Before Modification :<div id="imageDiv" class="header"> <img name="google" src="google.png"> <img name="yahoo" src="yahoo.jpg"> </div> Outer HTML After Modification :<div id="imageDiv" class=""> <img name="google" src="google.png"> <img name="yahoo" src="yahoo.jpg"> </div> --- Outer HTML Before Modification :<a href="www.sample1.com">Sample1</a> <a href="www.sample2.com">Sample2</a> <a href="www.sample3.com">Sample3</a> Outer HTML Before Modification :<a href="www.sample1.com" rel="nofollow">Sample1</a> <a href="www.sample2.com" rel="nofollow">Sample2</a> <a href="www.sample3.com" rel="nofollow">Sample3</a>
参考链接
https://www.learnfk.com/jsoup/jsoup-set-attributes.html
标签：教程,Outer,无涯,System,println,jsoup,HTML,Modification,out From： https://blog.51cto.com/u_14033984/9090209