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Java dom4j获取，添加，删除，查找，设置Element节点方法
1.获取文档的根节点.
Element rootElm = document.getRootElement();
2.取得某节点的单个子节点.
Element memberElm=root.element(“member”);// “member”是节点名
3.取得节点的文字
String text=memberElm.getText();//也可以用:
String text=root.elementText(“name”);//这个是取得根节点下的name字节点的文字.
4.取得某节点下名为”member”的所有字节点并进行遍历.
List nodes = rootElm.elements(“member”);
for (Iterator it = nodes.iterator(); it.hasNext();) {
Element elm = (Element) it.next();
// do something
}
5.对某节点下的所有子节点进行遍历.
for(Iterator it=root.elementIterator();it.hasNext();){
Element element = (Element) it.next();
// do something
}
6.在某节点下添加子节点.
Element ageElm = newMemberElm.addElement(“age”);
7.设置节点文字.
ageElm.setText(“29”);
8.删除某节点.
parentElm.remove(childElm);// childElm是待删除的节点,parentElm是其父节点
9.添加一个CDATA节点.
Element contentElm = infoElm.addElement(“content”);
contentElm.addCDATA(diary.getContent());
例子
public void modifyDoc() {
try {
Document doc = reader.read(new File(“file/catalog.xml”));
//修改节点内容
List list = doc.selectNodes(“//article”);
Iterator it = list.iterator();
while (it.hasNext()) {
Element el = it.next();
fail(el.getName() + “#” + el.getText() + “#” + el.getStringValue());
//修改title元素
Iterator elIter = el.elementIterator(“title”);
while(elIter.hasNext()) {
Element titleEl = elIter.next();
fail(titleEl.getName() + “#” + titleEl.getText() + “#” + titleEl.getStringValue());
if (“Java configuration with XML Schema”.equals(titleEl.getTextTrim())) {
//修改元素文本值
titleEl.setText(“Modify the Java configuration with XML Schema”);
fail(titleEl.getName() + “#” + titleEl.getText() + “#” + titleEl.getStringValue());
}
}
}
//修改节点子元素内容
list = doc.selectNodes(“//article/author”);
it = list.iterator();
while (it.hasNext()) {
Element el = it.next();
fail(el.getName() + “#” + el.getText() + “#” + el.getStringValue());
List childs = el.elements();
for (Element e : childs) {
fail(e.getName() + “#” + e.getText() + “#” + e.getStringValue());
if (“Marcello”.equals(e.getTextTrim())) {
e.setText(“Ayesha”);
} else if (“Vitaletti”.equals(e.getTextTrim())) {
e.setText(“Malik”);
}
fail(e.getName() + “#” + e.getText() + “#” + e.getStringValue());
}
}
//写入到文件
/*XMLWriter output = new XMLWriter(new FileWriter(new File(“file/catalog-modified.xml”)));
output.write(doc);
output.close();*/
} catch (DocumentException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
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