Java如何从JDOM中的XML元素中删除属性？
下面的示例向您展示如何从XML元素中删除属性。我们将从元素中删除命名userid的属性<row>。要删除属性，可以调用对象的removeAttribute(Stringname)方法Element。
package org.nhooo.example.jdom;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.input.SAXBuilder;
import org.jdom2.output.Format;
import org.jdom2.output.XMLOutputter;
import java.io.File;
public class JDOMRemoveAttribute {
public static void main(String[] args) {
SAXBuilder builder = new SAXBuilder();
try {
// <?xml version="1.0" encoding="UTF-8"?>
// <root>
// <row userid="alice">
// <firstname>Alice</firstname>
// <lastname>Starbuzz</lastname>
// </row>
// </root>
Document doc = builder.build(new File("data.xml"));
XMLOutputter out = new XMLOutputter(Format.getPrettyFormat());
out.output(doc, System.out);
//获取根元素并找到一个名为row的子项并删除
//其属性名为“userid”"userid"
Element root = doc.getRootElement();
root.getChild("row").removeAttribute("userid");
out.output(doc, System.out);
} catch (Exception e) {
e.printStackTrace();
}
}
}该程序将以下结果输出到控制台：
<?xml version="1.0" encoding="UTF-8"?>
<data>
<row>
<username>alice</username>
<password>secret</password>
</row>
</data>
<?xml version="1.0" encoding="UTF-8"?>
<data>
<row>
<username>alice</username>
<password>secret</password>
</row>
</data>Maven依赖
<!-- https://search.maven.org/remotecontent?filepath=org/jdom/jdom2/2.0.6/jdom2-2.0.6.jar -->
<dependency>
<groupId>org.jdom</groupId>
<artifactId>jdom2</artifactId>
<version>2.0.6</version>
</dependency>