【JAVA基础】0012--------判断String类型的XML中是否存在某一个节点

package com.wql.test01;

import java.io.IOException;
import javax.xml.parsers.ParserConfigurationException;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.jdom.JDOMException;
import org.xml.sax.SAXException;

public class TestXMl {
public static void main(String[] args) throws DocumentException, ParserConfigurationException, SAXException, IOException, JDOMException {
String xml = "<?xml version='1.0' encoding='UTF-8'?><root><RESPONSE_CODE>200</RESPONSE_CODE><RESPONSE_MSG>影像统计成功,没有该批次的影像信息</RESPONSE_MSG></root>";

Document document = DocumentHelper.parseText(xml);
Element elementTemplate = document.getRootElement();
Element node = (Element)elementTemplate.selectSingleNode("//RESPONSE_CODE");
if(node == null){
System.out.println("1111111111111");
}else {
System.out.println("2222222222222");
}

}
}