Java如何获取xml文件中子节点的属性

小灰灰 2022-06-09 08:56 408阅读 0赞

import java.io.ByteArrayInputStream;
    
    import javax.xml.parsers.DocumentBuilder;
    import javax.xml.parsers.DocumentBuilderFactory;
    
    import org.w3c.dom.Document;
    import org.w3c.dom.Element;
    import org.w3c.dom.NodeList;
    import org.w3c.dom.Text;
    
    public class XmlNodeValue {
    	
    	
    	public static String getStringFile(String xml) throws Exception {
        	String downupload = "";
    
            String statusResult = ""; // 存放应答消息中<status>元素的result属性
            String statusText = ""; // 存放应答消息中<status>元素的text
    
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(new ByteArrayInputStream(xml.getBytes()));
    
            // xml中元素的变量命名均以_符号起始.下同
            Element _message = doc.getDocumentElement();
    
            // 取二级元素content
            NodeList _contentList = _message.getElementsByTagName("content");
            
            if (_contentList.getLength() == 1) {
                Element _content = (Element) _contentList.item(0);
    
                // 取三级元素status
                NodeList _statusList = _content.getElementsByTagName("status");
                if (_statusList.getLength() == 1) {
                    Element _status = (Element) _statusList.item(0);
                    Text t = (Text) _status.getFirstChild();
                    statusText = t.getNodeValue();
                    statusResult = _status.getAttribute("result");
                }
    
                if (statusResult.equals("exception") || statusResult.equals("error")) {
                    System.out.println(statusText);
                    throw new Exception(statusText);
                } else if (statusResult.equals("normal")) {
                	downupload = _content.getElementsByTagName("resultPath").item(0).getFirstChild().getNodeValue();
                	//resultPath节点的value值
                	System.out.println("resultPath节点的value值:" + downupload);
                }
            }
            return downupload;
        }
    	
    	public static void main(String[] args) throws Exception {
    		String xml = "<?xml version=\"1.1\" encoding=\"gb2312\"?>"
    				+ "<message>"
    					+ "<function name=\"query\">query_bad_call_number_143_export</function>"
    					+ "<service>call</service>"
    					+ "<content>"
    						+ "<status result=\"normal\">被操作对象:全部号码,OK</status>"
    						+ "<resultPath>/home/abc/efd/datafile/file/doubtResult_143/doubt_result_143_20170901154904.xls</resultPath>"
    					+ "</content>"
    				+ "</message>";
    		
    		getStringFile(xml);
    		
    	}
    
    }