以下示例将展示使用方法设置dom元素的属性，批量更新以及在将HTML字符串解析为Document对象后添加/删除类方法.
Document document = Jsoup.parse(html);
Element link = document.select("a").first();
link.attr("href","www.yahoo.com");
link.addClass("header");
link.removeClass("header");其中
文件 : document对象代表HTML DOM.
Jsoup : 用于解析给定HTML字符串的主类.
html : HTML字符串.
链接 : Element对象表示代表锚标记的html节点元素.
link.attr() : attr(attribute，value)方法将元素属性设置为相应的值.
link.addClass() : addClass(class)方法在class属性下添加类.
link.removeClass() : removeClass(class)方法删除class属性下的类.
元素对象代表一个dom elment并提供各种方法来获取dom元素的属性.
使用您选择的任何编辑器创建以下java程序比方说C:/> jsoup.
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);
//Example: set attribute
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("---");
//Example: add class
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("---");
//Example: remove class
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("---");
//Example: bulk update
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编译类编译如下:
C:\jsoup>javac JsoupTester.java
现在运行JsoupTester查看结果.
C:\jsoup>java JsoupTester
查看结果.
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>
