好用的对象转xml、xml转对象工具类-支持集合嵌套转换（Java实现）

网上找了很多转换工具，对于自己的业务都不是很合适，所以总结了一下网上的方案，最终定下来是这样子的，主要使用dom4j做操作

maven依赖

<dependency><groupId>dom4j</groupId><artifactId>dom4j</artifactId><version>1.6.1</version>
</dependency>

package com.aier.cloud.biz.crm.utils;import org.apache.commons.lang3.StringUtils;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.*;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.*;/*** @author szz* @since 2019/8/5 10:36*/
public class XmlUtil {/*** XML格式字符串转换为Map** @param strXML XML字符串* @return XML数据转换后的Map* @throws Exception*/public static Map<String, String> xmlToMap(String strXML) throws Exception {try {Map<String, String> data = new HashMap<String, String>();DocumentBuilder documentBuilder = newDocumentBuilder();InputStream stream = new ByteArrayInputStream(strXML.getBytes("GB2312"));org.w3c.dom.Document doc = documentBuilder.parse(stream);doc.getDocumentElement().normalize();NodeList nodeList = doc.getDocumentElement().getChildNodes();for (int idx = 0; idx < nodeList.getLength(); ++idx) {Node node = nodeList.item(idx);if (node.getNodeType() == Node.ELEMENT_NODE) {org.w3c.dom.Element element = (org.w3c.dom.Element) node;data.put(element.getNodeName(), element.getTextContent());}}try {stream.close();} catch (Exception ex) {// do nothing}return data;} catch (Exception ex) {throw ex;}}public static DocumentBuilder newDocumentBuilder() throws ParserConfigurationException {DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();documentBuilderFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);documentBuilderFactory.setFeature("http://xml.org/sax/features/external-general-entities", false);documentBuilderFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);documentBuilderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);documentBuilderFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);documentBuilderFactory.setXIncludeAware(false);documentBuilderFactory.setExpandEntityReferences(false);return documentBuilderFactory.newDocumentBuilder();}public static org.w3c.dom.Document newDocument() throws ParserConfigurationException {return newDocumentBuilder().newDocument();}/*** 将Map转换为XML格式的字符串** @param data Map类型数据* @return XML格式的字符串* @throws Exception*/public static String mapToXml(Map<String, String> data, String baseTagName, String encoding) throws Exception {org.w3c.dom.Document document = newDocument();org.w3c.dom.Element root = document.createElement(baseTagName);document.appendChild(root);for (String key : data.keySet()) {String value = data.get(key);if (value == null) {value = "";}value = value.trim();org.w3c.dom.Element filed = document.createElement(key);filed.appendChild(document.createTextNode(value));root.appendChild(filed);}TransformerFactory tf = TransformerFactory.newInstance();Transformer transformer = tf.newTransformer();DOMSource source = new DOMSource(document);transformer.setOutputProperty(OutputKeys.ENCODING, encoding);transformer.setOutputProperty(OutputKeys.INDENT, "yes");StringWriter writer = new StringWriter();StreamResult result = new StreamResult(writer);transformer.transform(source, result);String output = writer.getBuffer().toString(); //.replaceAll("\n|\r", "");try {writer.close();} catch (Exception ex) {}return output;}/*** 重载，默认根节点为Request 编码格式为GB2312** @param data* @return* @throws Exception*/public static String mapToXml(Map<String, String> data) throws Exception {return mapToXml(data, "Request", "GB2312");}/*** 反射设置实体不同类型字段的值 <暂时只支持 日期 字符串 boolean Integer值设置 待扩建>** @param field* @param obj* @param value* @throws Exception*/public static void convertValue(Field field, Object obj, String value)throws Exception {SimpleDateFormat sim = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");if (field.getGenericType().toString().equals("class java.lang.Integer")) {field.set(obj, Integer.parseInt(value));} else if (field.getGenericType().toString().equals("boolean")) {field.set(obj, Boolean.parseBoolean(value));} else if (field.getGenericType().toString().equals("class java.util.Date")) {field.set(obj, sim.parse(value));} else {field.set(obj, value);}}/*** 解析xml文件返回保存Map的集合，map中可能包含key值为returnCode、desc、totalCount等单字段.* 也可能包含存储对象为List<cls>的集合值.* 获取List值key cls_List** @param requestPath* @param cls* @return map* @throws Exception*/@SuppressWarnings("unchecked")public static Map<String, Object> parseXml2Map(String requestPath,Class<?> cls) throws Exception {Map<String, Object> maps = new HashMap<String, Object>();List<Object> lists = new ArrayList<Object>();SAXReader saxReader = new SAXReader();//当传入的是xml字符串时，采用这个方案Document doc = doc = DocumentHelper.parseText(requestPath);Element et = doc.getRootElement();// 标记List是否为空// boolean bool = true ;// 根节点名字List<Element> rList = et.elements();for (Element element : rList) {List<Element> rLists = element.elements();if (!rLists.isEmpty() && rLists.size() > 0) {//bool = false;// 判断二级节点for (Element e : rLists) {List<Element> li = e.elements();Class<?> cl = (Class<?>) Class.forName(cls.getName());Object ob = cl.newInstance();for (Element element2 : li) {String name = element2.getName();String value = element2.getText();Field field = ob.getClass().getDeclaredField(name);field.setAccessible(true);convertValue(field, ob, value);}lists.add(ob);}} else {maps.put(element.getName(), element.getText());}//maps.put(cls.getSimpleName() + "_List", lists);maps.put("ItemList", lists);}return maps;}/*** https://www.cnblogs.com/interdrp/p/5825453.html1* 解析xml文件返回保存cls的List集合，如果返回码ResultCode=1时则返回List为null** @param xml* @param cls* @return* @throws Exception*/@SuppressWarnings("unchecked")public static List<?> parseXml2List(String xml, Class<?> cls)throws Exception {List<Object> lists = null;Document doc = DocumentHelper.parseText(xml);Element et = doc.getRootElement();String root = et.getName();// 查看返回码是否为真.List<Element> list = doc.selectNodes("//" + root + "/ResultCode");if (!list.isEmpty() && list.size() > 0) {Element element = list.get(0);String returnResult = element.getText();if (returnResult.equals("0")) {List<Element> father = doc.selectNodes("//" + root + "/" + cls.getSimpleName() + "s");//判断对象父节点是否有包含数据if (father != null && !father.isEmpty() && father.size() == 1) {List<Element> userLists = father.get(0).elements();if (userLists != null && !list.isEmpty()) {lists = new ArrayList<Object>();for (Element e : userLists) {List<Element> li = e.elements();Class<?> cl = (Class<?>) Class.forName(cls.getName());Object ob = cl.newInstance();for (Element element2 : li) {String name = element2.getName();String value = element2.getText();Field field = ob.getClass().getDeclaredField(name);field.setAccessible(true);convertValue(field, ob, value);}lists.add(ob);}}}}}return lists;}/*** 解析xml文件返回保存cls的List集合，如果返回码ResultCode=1时则返回List为null** @param url* @param cls* @return* @throws Exception*/@SuppressWarnings("unchecked")public static List<?> parseXml2List(URL url, Class<?> cls)throws Exception {List<Object> lists = null;SAXReader saxReader = new SAXReader();Document doc = saxReader.read(url);Element et = doc.getRootElement();String root = et.getName();// 查看返回码是否为真.List<Element> list = doc.selectNodes("//" + root + "/ResultCode");if (!list.isEmpty() && list.size() > 0) {Element element = list.get(0);String returnResult = element.getText();if (returnResult.equals("0")) {List<Element> father = doc.selectNodes("//" + root + "/" + cls.getSimpleName() + "s");//判断对象父节点是否有包含数据if (father != null && !father.isEmpty() && father.size() == 1) {List<Element> userLists = father.get(0).elements();if (userLists != null && !list.isEmpty()) {lists = new ArrayList<Object>();for (Element e : userLists) {List<Element> li = e.elements();Class<?> cl = (Class<?>) Class.forName(cls.getName());Object ob = cl.newInstance();for (Element element2 : li) {String name = element2.getName();String value = element2.getText();Field field = ob.getClass().getDeclaredField(name);field.setAccessible(true);convertValue(field, ob, value);}lists.add(ob);}}}}}return lists;}/*** 解析xml文件返回保存Map的集合，map中可能包含key值为returnCode、desc、totalCount等单字段.* 也可能包含存储对象为List<cls>的集合值.* 获取List值key cls_List** @param requestPath* @param cls* @return map* @throws Exception*/@SuppressWarnings("unchecked")public static Map<String, Object> parseXml2MapOld(String requestPath,Class<?> cls) throws Exception {Map<String, Object> maps = new HashMap<String, Object>();List<Object> lists = new ArrayList<Object>();SAXReader saxReader = new SAXReader();//Document doc = saxReader.read(new File(requestPath));//Document doc = saxReader.read(new URL(requestPath));//当传入的是xml字符串时，采用这个方案Document doc = doc = DocumentHelper.parseText(requestPath);Element et = doc.getRootElement();// 标记List是否为空// boolean bool = true ;// 根节点名字List<Element> rList = et.elements();for (Element element : rList) {List<Element> rLists = element.elements();if (!rLists.isEmpty() && rLists.size() > 0) {//bool = false;// 判断二级节点for (Element e : rLists) {List<Element> li = e.elements();Class<?> cl = (Class<?>) Class.forName(cls.getName());Object ob = cl.newInstance();for (Element element2 : li) {String name = element2.getName();String value = element2.getText();Field field = ob.getClass().getDeclaredField(name);field.setAccessible(true);convertValue(field, ob, value);}lists.add(ob);}} else {maps.put(element.getName(), element.getText());}//maps.put(cls.getSimpleName() + "_List", lists);maps.put("ItemList", lists);}return maps;}/*** 只获取返回码0为保存成功(true)1为保存失败(false)*/@SuppressWarnings("unchecked")public static boolean parseXmlReturnCode(String xml) {boolean bool = false;try {Document doc = DocumentHelper.parseText(xml);Element et = doc.getRootElement();String root = et.getName();// 查看返回码是否为真.List<Element> list = doc.selectNodes("//" + root + "/ResultCode");if (!list.isEmpty() && list.size() > 0) {Element element = list.get(0);String returnResult = element.getText();if (returnResult.equals("0")) {bool = true;}}} catch (Exception e) {e.printStackTrace();}return bool;}/**** https://blog.csdn.net/javaniche/article/details/79655473* 格式化输出xml** @param document* @return* @throws DocumentException* @throws IOException*/public static String formatXml(Document document) throws DocumentException, IOException {// 格式化输出格式OutputFormat format = OutputFormat.createPrettyPrint();format.setEncoding("GB2312");StringWriter writer = new StringWriter();// 格式化输出流XMLWriter xmlWriter = new XMLWriter(writer, format);// 将document写入到输出流xmlWriter.write(document);xmlWriter.close();return writer.toString();}public static Document map2Xml(Map<String, Object> map, String node, String type) throws Exception {Document document = DocumentHelper.createDocument();Element nodeElement = document.addElement(node);map2Xml(map, nodeElement, type);return document;}public static final String map2Xml_TYPE_listElementWrapper = "1";private static void map2Xml(Map<String, Object> map, Element nodeElement, String type) throws Exception {for (Map.Entry<String, Object> entry : map.entrySet()) {String key = (String) entry.getKey();Object value = entry.getValue();if ((value instanceof List) && StringUtils.isBlank(type)) {Element element = nodeElement.addElement(key);List<Map<String, Object>> list = (List<Map<String, Object>>) value;for (Map<String, Object> subMap : list) {Element itemElement = element.addElement("Item");map2Xml(subMap, itemElement, type);}} else if ((value instanceof List) && StringUtils.isNotBlank(type) && type.contains(map2Xml_TYPE_listElementWrapper)) {List<Map<String, Object>> list = (List<Map<String, Object>>) value;for (Map<String, Object> subMap : list) {Element element = nodeElement.addElement(key);map2Xml(subMap, element, type);}} else if (value instanceof Map) {Element element = nodeElement.addElement(key);Map<String, Object> valueMap = (Map<String, Object>) value;map2Xml(valueMap, element, type);} else if (value instanceof String) {Element keyElement = nodeElement.addElement(key);keyElement.setText((String) value);} else if (value instanceof Integer) {Element keyElement = nodeElement.addElement(key);keyElement.setText(((Integer) value).toString());} else if (value instanceof BigDecimal) {Element keyElement = nodeElement.addElement(key);keyElement.setText(((BigDecimal) value).toString());} else if (value instanceof Date) {Element keyElement = nodeElement.addElement(key);keyElement.setText((new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(value)).toString());} else {throw new Exception("不支持的 value 类型");}}}}

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