2019独角兽企业重金招聘Python工程师标准>>> 
利用 JDK 自带的 org.w3c.dom 进行对象,map 与 xml 的简单互相转换, 其中用到了一个工具类 Hutools 下面是hutools的maven依赖
cn.hutool
hutool-all
4.1.19
下面是工具类
/**
* xml 工具,基于 jdk 内置的 xml api
* @author zcqshine
* @date 2018/12/8
*/
@Slf4j
public class W3CXmlUtil {
/**
* Number 子类的类型名称集合
*/
private static final Set NUMBER_CHILDREN_CLASS_NAME = new HashSet<>();
static {
NUMBER_CHILDREN_CLASS_NAME.add(Integer.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(Float.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(Short.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(Double.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(Long.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(BigDecimal.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(BigInteger.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(int.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(short.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(float.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(double.class.getName());
NUMBER_CHILDREN_CLASS_NAME.add(long.class.getName());
}
/**
* xml 字符串转换为 Object
* @param xmlStr
* @param clazz
* @param
* @return
* @throws Exception
*/
public static T readObjectFormXml(String xmlStr, Class clazz) throws Exception {
T t;
if (xmlStr == null || xmlStr.trim().length() == 0){
throw new IllegalArgumentException("XML content string is empty !");
} else {
try {
t = clazz.newInstance();
Document document = XmlUtil.parseXml(xmlStr);
if (document != null){
Element element = document.getDocumentElement();
if (element != null){
NodeList nodeList = element.getChildNodes();
for (int i = 0; i xml2Map(String xmlStr){
Map map = new TreeMap<>();
if (StrUtil.isBlank(xmlStr)){
throw new IllegalArgumentException("xml is empty");
}else{
Document document = XmlUtil.parseXml(xmlStr);
Element element = document.getDocumentElement();
if (element != null){
NodeList nodeList = element.getChildNodes();
for (int i = 0; i < nodeList.getLength(); i++){
Node node = nodeList.item(i);
String nodeName = node.getNodeName();
String nodeText = node.getTextContent();
map.put(nodeName, nodeText);
}
}
}
return map;
}
/**
* Object 转 xml 字符串
* @param t
* @param
* @return
*/
public static String object2Xml(T t){
try {
//得到 DOM 解析器的工厂实例
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
//从 DOM 工厂中获得 DOM 解析器
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.newDocument();
Element root = document.createElement("xml");
document.appendChild(root);
Class clazz = t.getClass();
Field[] fields = clazz.getDeclaredFields();
if (fields.length > 0){
for (Field field : fields) {
field.setAccessible(true);
String fieldName = field.getName();
Element element = document.createElement(fieldName);
Object obj = field.get(t);
if (obj != null){
String value = String.valueOf(obj);
element.appendChild(document.createCDATASection(value));
}
root.appendChild(element);
}
}
return XmlUtil.toStr(document);
} catch (ParserConfigurationException | IllegalAccessException e) {
log.error("对象转 XML 失败. ", e);
}
return null;
}
/**
* map 转 xml
* @param map
* @return
*/
public static String map2Xml(Map map){
if (map != null && !map.isEmpty()){
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
//从 DOM 工厂中获得 DOM 解析器
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.newDocument();
Element root = document.createElement("xml");
document.appendChild(root);
map.entrySet().forEach(item -> {
String key = item.getKey();
T object = item.getValue();
String value = null;
if (object != null){
value = String.valueOf(object);
}
Element element = document.createElement(key);
element.appendChild(document.createCDATASection(value));
root.appendChild(element);
});
return XmlUtil.toStr(document);
} catch (ParserConfigurationException e) {
log.error("map转 xml 失败.", e);
}
}
return null;
}
}