java dom4j 遍历xml字符串中所有元素和属性的值

刺骨的言语ヽ痛彻心扉 2021-10-14 17:03 333阅读 0赞

项目中需要接受返回的xml的字符串报文，需要提取响应的值，于是有了以下代码。  
dom4j jar包下载地址：[https://dom4j.github.io][https_dom4j.github.io]

public class XMLTest {
    
        public static void main(String[] args) {
            String xml = "<?xml version=\"1.0\" encoding=\"GBK\"?>\n" +
                    "<BACKINFO TIME=\"2019-08-14 09:56:55\">" +
                    "   <POLICY NO=\"FJKDJFAKJIV4544154451\" RETURN=\"false\">" +
                    "       <ERROR NO=\"1\" INFO=\"提示信息\"/>" +
                    "   </POLICY>" +
                    "</BACKINFO>";
    
            Map<String, Map<String, String>> map = getElementMap(xml);
            for(Map.Entry<String, Map<String, String>> entry : map.entrySet()) {
                System.out.println("-------" + entry.getKey());
                for(Map.Entry<String, String> entry1 : entry.getValue().entrySet()) {
                    System.out.println(entry1.getKey() + "               " + entry1.getValue());
                }
            }
        }
    
        public static Map<String, Map<String, String>> getElementMap(String xml) {
            Map<String, Map<String, String>> map = new HashMap<String, Map<String, String>>();
            try {
                Document document = DocumentHelper.parseText(xml);
                Element rootElement = document.getRootElement();
                recursionElements(map, rootElement);
    
            } catch (DocumentException e) {
                e.printStackTrace();
            }
    
            return map;
        }
    
        /**
         * 递归遍历所有Element，将其本身的值和属性的值放入map中，每个节点的值可用其名获取
         * @param map
         * @param parentElement
         */
        public static void recursionElements(Map<String, Map<String, String>> map, Element parentElement) {
            System.out.println("******" + parentElement.getName());
    
            //将父节点本身的信息存入map中
            Map<String, String> parentMap = new HashMap<String, String>();
            parentMap.put(parentElement.getName(), parentElement.getText());
    
            List<Attribute> attributes = parentElement.attributes();
            if(attributes != null && attributes.size() > 0) {
                for(Attribute attribute : attributes) {
                    parentMap.put(attribute.getName(), attribute.getValue());
                }
            }
            map.put(parentElement.getName(), parentMap);
    
            //将其子节点的信息存入map中
            List<Element> childList = null;
            for(Element element : parentElement.elements()) {
                childList = element.elements();
                //当其没有子节点时，将其信息放入map中
                if(childList == null || childList.size() == 0) {
                    List<Attribute> attributeList = element.attributes();
                    Map<String, String> childMap = new HashMap<String, String>();
                    childMap.put(element.getName(), element.getText());
                    if(attributeList != null && attributeList.size() > 0) {
                        for(Attribute attribute : attributeList) {
                            childMap.put(attribute.getName(), attribute.getValue());
                        }
                    }
                    map.put(element.getName(), childMap);
                } else {
                    //当其存在子节点时，递归遍历
                    recursionElements(map, element);
                }
            }
        }
    
    }

[https_dom4j.github.io]: https://dom4j.github.io