Java使用Dom4J 遍历复杂XML节点
public void analysisXML() throws DocumentException {
SAXReader saxread = new SAXReader();
File xmlFile = new File("idcMonitor.xml");
if (xmlFile.exists()) {
Document document = saxread.read(xmlFile);// 读取XML文件
List<Element> houseMonitorList = document.selectNodes("//idcMonitor/houseMonitor"); //找到位于idcMonitor下的houseMonitor节点
for (int i = 0; i < houseMonitorList.size(); i++) {
Element houseMonitor=houseMonitorList.get(i);
Element id"); //获得houseMonitor节点下的id值
System.out.println(id.getName()+" "+id.getTextTrim());
Element ip=(Element) houseMonitor.selectSingleNode("ip"); //获得houseMonitor节点下的ip值
System.out.println(ip.getName()+" "+ip.getTextTrim());
Element port=(Element) houseMonitor.selectSingleNode("port"); //获得houseMonitor节点下的port值
System.out.println(port.getName()+" "+port.getTextTrim());
Element domain=(Element) houseMonitor.selectSingleNode("domain"); //获得houseMonitor节点下的domain值
System.out.println(domain.getName()+" "+domain.getTextTrim());
Element serviceType=(Element) houseMonitor.selectSingleNode("serviceType"); //获得houseMonitor节点下的serviceType值
System.out.println(serviceType.getName()+" "+serviceType.getTextTrim());
Element firstFound=(Element) houseMonitor.selectSingleNode("firstFound"); //获得houseMonitor节点下的firstFound值
System.out.println(firstFound.getName()+" "+firstFound.getTextTrim());
Element lastFound=(Element) houseMonitor.selectSingleNode("lastFound"); //获得houseMonitor节点下的lastFound值
System.out.println(lastFound.getName()+" "+lastFound.getTextTrim());
Element illegalInfo=(Element)houseMonitor.selectSingleNode("illegalInfo");//获得houseMonitor节点下的illegalInfo值
Iterator<Element> illegalInfoIterator=illegalInfo.elementIterator();
while(illegalInfoIterator.hasNext())
{
Element temporary=illegalInfoIterator.next();
System.out.println(temporary.getName()+" "+temporary.getTextTrim());
}
Element ipInfo=(Element)houseMonitor.selectSingleNode("ipInfo");//获得houseMonitor节点下的ipInfo值
Iterator<Element> ipInfoIterator=ipInfo.elementIterator();
while(ipInfoIterator.hasNext())
{
Element temporary=ipInfoIterator.next();
System.out.println(temporary.getName()+" "+temporary.getTextTrim());
}
System.out.println("---------------------");
}
}
}
这里使用了Dom4J的selectNodes()和selectSingleNode()还有迭代elementIterator()方法；
selectNodes()方法是指定节点，注意这后面的是有"s"的；
List<Element> houseMonitorList = document.selectNodes("//idcMonitor/houseMonitor"); //找到位于idcMonitor下的houseMonitor节点
selectSingleNode()方法是获得单个节点的，后上面的selectNodes()方法是相对的
Element illegalInfo=(Element)houseMonitor.selectSingleNode("illegalInfo");//获得houseMonitor节点下的illegalInfo值
elementIterator()方法是迭代这个节点下面的节点，但是如果这个迭代之后的节点还有节点，这个迭代器是不会进入的，也就是这个迭代器只会进入一层。
Element illegalInfo=(Element)houseMonitor.selectSingleNode("illegalInfo");//获得houseMonitor节点下的illegalInfo值
Iterator<Element> illegalInfoIterator=illegalInfo.elementIterator();
while(illegalInfoIterator.hasNext())
{
Element temporary=illegalInfoIterator.next();
System.out.println(temporary.getName()+" "+temporary.getTextTrim());
}
最后看看上面执行的结果：
id 123 ip 10.2.45.123 port 100 domain www.sina.com serviceType 1 firstFound 2013-08-21 12:33:22 lastFound 2013-08-21 13:00:00 illegalType 1 currentState 1 user admin icpError 0 regError 1 regDomain www.baidu.com --------------------- id 456 ip 10.2.45.456 port 200 domain www.baidu.com serviceType 3 firstFound 2013-08-29 12:33:22 lastFound 2013-08-30 13:00:00 illegalType 2 currentState 2 user admin2 icpError 1 regError 2 regDomain www.ambimmort.com ---------------------
当然最后附上原始解析的XML：
<?xml version="1.0" encoding="UTF-8"?>
<idcMonitor>
<commandId>201020000000169282</commandId>
<idcId>1019</idcId>
<monitorState>1</monitorState>
<houseMonitor>
<id>123</id>
<ip>10.2.45.123</ip>
<port>100</port>
<domain>www.sina.com</domain>
<serviceType>1</serviceType>
<firstFound>2013-08-21 12:33:22</firstFound>
<lastFound>2013-08-21 13:00:00</lastFound>
<illegalInfo>
<illegalType>1</illegalType>
<currentState>1</currentState>
<user>admin</user>
</illegalInfo>
<ipInfo>
<icpError>0</icpError>
<regError>1</regError>
<regDomain>www.baidu.com</regDomain>
</ipInfo>
</houseMonitor>
<houseMonitor>
<id>456</id>
<ip>10.2.45.456</ip>
<port>200</port>
<domain>www.baidu.com</domain>
<serviceType>3</serviceType>
<firstFound>2013-08-29 12:33:22</firstFound>
<lastFound>2013-08-30 13:00:00</lastFound>
<illegalInfo>
<illegalType>2</illegalType>
<currentState>2</currentState>
<user>admin2</user>
</illegalInfo>
<ipInfo>
<icpError>1</icpError>
<regError>2</regError>
<regDomain>www.ambimmort.com</regDomain>
</ipInfo>
</houseMonitor>
<timeStamp>2013-08-22 12:57:13</timeStamp>
</idcMonitor>