[英]How could I get the total number inside a java xml tap?
對於xml文件視圖:
<?xml version="1.0"?>
<EXAMPLE DATE="20160830">
<SUB NUM="1">
<NAME>Peter</NAME>
</SUB>
<SUB NUM="2">
<NAME>Mary</NAME>
</SUB>
</EXAMPLE>
在設置NodeList來檢查文檔后,
我希望可以將每個“ SUB NUM =“ [x]”“
對於我為其設置的代碼:
NodeList nList= doc.getElementsByTagName("NUM"); // doc has been set correct and get successful
nList.length將返回“ 2”,這是因為xml的水龍頭中有2個被命名為:“ NUM”,但是我只想檢查每個組。
有什么主意我怎么能得到像這樣的長度:
SUB NUM [1]找到:[1]抽頭名稱的長度:[NAME]
SUB NUM [2]找到:[1]抽頭名稱的長度:[NAME]
這可以如下進行。 僅使用JAVA8語法進行哈希圖打印。 如果您不在8上,則應該能夠正常迭代並打印。
import java.io.StringReader;
import java.util.HashMap;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class NumCountHandler extends DefaultHandler {
private HashMap<String, Integer> countOfNum = new HashMap<String, Integer>();
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
if (qName.equalsIgnoreCase("SUB")) {
String attributeNum = attributes.getValue("NUM");
// System.out.println("Here" + qName +"" + );
if (countOfNum.containsKey(attributeNum)) {
Integer count = countOfNum.get(attributeNum);
countOfNum.put(attributeNum, new Integer(count.intValue() + 1));
} else {
countOfNum.put(attributeNum, new Integer(1));
}
}
}
public static void main(String[] args) {
try {
String xml = "<EXAMPLE DATE=\"20160830\"> <SUB NUM=\"1\"> <NAME>Peter</NAME> </SUB> <SUB NUM=\"2\"> <NAME>Mary</NAME> </SUB></EXAMPLE>";
InputSource is = new InputSource(new StringReader(xml));
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
NumCountHandler userhandler = new NumCountHandler();
saxParser.parse(is, userhandler);
userhandler.countOfNum
.forEach((k, v) -> System.out.println("SUB NUM [" + k + "]" + "Length with tap name :[" + v + "]"));
} catch (Exception e) {
e.printStackTrace();
}
}
}
版畫
SUB NUM [1]Length with tap name :[1]
SUB NUM [2]Length with tap name :[1]
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