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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)

东方小不点 2022-08-29 阅读 70


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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