java:利用xpath删除xml中的空节点

时间:2023-03-08 22:02:16

原始xml内容:

 <data>
<a> </a>
<b>b1</b>
<awb>
<awbpre>123</awbpre>
<awbno></awbno>
</awb>
<spls>
<spl />
</spls>
</data>

可用下面的代码去掉 <awbno></awbno>、<spls><spl/></spls>这二个空节点 (注<a> </a>中间有一个空格,不算空节点)

     @Test
public void testDeleteEmptyNode() throws DocumentException {
String xmlOrigin = "<data><a> </a><b>b1</b><awb><awbpre>123</awbpre><awbno></awbno></awb><spls><spl/></spls></data>";
SAXReader saxReader = new SAXReader();
Document document = saxReader.read(new ByteArrayInputStream(xmlOrigin
.getBytes())); while (true) {
@SuppressWarnings("unchecked")
List<Element> list = document.selectNodes("//*[not(node())]");
if (list == null || list.size() <= 0) {
break;
}
for (Element e : list) {
System.out.println(e.getName());
e.getParent().remove(e);
}
}
System.out.println(document.asXML()); }

以上代码使用了dom4j

输出内容:

awbno
spl
spls
<?xml version="1.0" encoding="UTF-8"?>
<data><a> </a><b>b1</b><awb><awbpre>123</awbpre></awb></data>

即:

 <data>
<a> </a>
<b>b1</b>
<awb>
<awbpre>123</awbpre>
</awb>
</data>