在Java中从XML标记检索值
我有一组来自自然语言工具的XML字符串输出,需要从中检索值,还需要为输出字符串中未显示的标记提供空值。尝试使用中提供的Java代码,但似乎不起作用 当前样本标签清单如下所示:在Java中从XML标记检索值,java,xml,nlp,Java,Xml,Nlp,我有一组来自自然语言工具的XML字符串输出,需要从中检索值,还需要为输出字符串中未显示的标记提供空值。尝试使用中提供的Java代码,但似乎不起作用 当前样本标签清单如下所示: <TimeStamp>, <Role>, <SpeakerId>, <Person>, <Location>, <Organization> 为了使用上面链接中提供的Java代码(在更新的代码中),我插入了和,如下所示: <Dummy>
<TimeStamp>, <Role>, <SpeakerId>, <Person>, <Location>, <Organization>
为了使用上面链接中提供的Java代码(在更新的代码中),我插入了
和
,如下所示:
<Dummy><TimeStamp>00.00.00</TimeStamp><Role>Speaker1</Role><SpeakerId>1234</SpeakerId>Blah, blah, blah.</Dummy>
00.00.00扬声器11234诸如此类,诸如此类。
但是,它只返回dummy和null。由于我还是Java的新手,非常感谢详细的解释。试着这样做:希望能对您有所帮助
File fXmlFile = new File("yourfile.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFile);
您可以获得如下所示的子节点列表:
NodeList nList = doc.getElementsByTagName("staff");
Node nNode = nList.item(temp);
获取如下所示的项目:
NodeList nList = doc.getElementsByTagName("staff");
Node nNode = nList.item(temp);
这就是我最后为Java包装器所做的事情(仅显示时间戳)
公共类邮件{
公共字符串转换XML(字符串输入){
字符串输出=输入;
试一试{
DocumentBuilderFactory docBuilderFactory=
DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder=docBuilderFactory.newDocumentBuilder();
InputSource is=新的InputSource();
is.setCharacterStream(新的StringReader(nerOutput));
Document doc=docBuilder.parse(is);
//规范化文本表示
doc.getDocumentElement().normalize();
NodeList listOfDummies=doc.getElementsByTagName(“虚拟”);
对于(int s=0;sShow您使用的代码。以及实际使用的xml作为输入。这就是我最终要做的:很高兴我能帮助您:D
public class NERPost {
public String convertXML (String input) {
String nerOutput = input;
try {
DocumentBuilderFactory docBuilderFactory =
DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader(nerOutput));
Document doc = docBuilder.parse(is);
// normalize text representation
doc.getDocumentElement ().normalize ();
NodeList listOfDummies = doc.getElementsByTagName("dummy");
for(int s=0; s<listOfDummies.getLength() ; s++){
Node firstDummyNode = listOfDummies.item(s);
if(firstDummyNode.getNodeType() == Node.ELEMENT_NODE){
Element firstDummyElement = (Element)firstDummyNode;
//Convert each entity label --------------------------------
//TimeStamp
String ts = "<TimeStamp>";
Boolean foundTs;
if (foundTs = nerOutput.contains(ts)) {
NodeList timeStampList = firstDummyElement.getElementsByTagName("TimeStamp");
//do it recursively
for (int i=0; i<timeStampList.getLength(); i++) {
Node firstTimeStampNode = timeStampList.item(i);
Element timeStampElement = (Element)firstTimeStampNode;
NodeList textTSList = timeStampElement.getChildNodes();
String timeStampOutput = ((Node)textTSList.item(0)).getNodeValue().trim();
System.out.println ("<TimeStamp>" + timeStampOutput + "</TimeStamp>\n")
} //end for
}//end if
//other XML tags
//.....
}//end if
}//end for
}
catch...
}//end try
}}