java xml转map map转xml 带属性

 

参考效果：xml转json

java xml转json json转xml
http://happyqing.iteye.com/blog/2316142

 

java xml转map

package xml2map;

import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import net.sf.json.JSON;
import net.sf.json.JSONObject;

import org.apache.commons.io.FileUtils;
import org.dom4j.Attribute;
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.XMLWriter;

/**
 * xml转map，map转xml 带属性 
 * http://happyqing.iteye.com/blog/2316275 
 * @author happyqing
 * @since 2016.8.8
 */
@SuppressWarnings({ "rawtypes", "unchecked" })
public class XmlUtil {
	public static void main(String[] args) throws DocumentException, IOException {
		String textFromFile = FileUtils.readFileToString(new File("D:/workspace/workspace_3.7/xml2map/src/xml2json/sample.xml"),"UTF-8");
		Map<String, Object> map = xml2map(textFromFile, false);
		// long begin = System.currentTimeMillis();
		// for(int i=0; i<1000; i++){
		// map = (Map<String, Object>) xml2mapWithAttr(doc.getRootElement());
		// }
		// System.out.println("耗时:"+(System.currentTimeMillis()-begin));
		JSON json = JSONObject.fromObject(map);
		System.out.println(json.toString(1)); // 格式化输出
		
		Document doc = map2xml(map, "root");
		//Document doc = map2xml(map); //map中含有根节点的键
		System.out.println(formatXml(doc));
	}
		
	/**
	 * xml转map 不带属性
	 * @param xmlStr
	 * @param needRootKey 是否需要在返回的map里加根节点键
	 * @return
	 * @throws DocumentException
	 */
	public static Map xml2map(String xmlStr, boolean needRootKey) throws DocumentException {
		Document doc = DocumentHelper.parseText(xmlStr);
		Element root = doc.getRootElement();
		Map<String, Object> map = (Map<String, Object>) xml2map(root);
		if(root.elements().size()==0 && root.attributes().size()==0){
			return map;
		}
		if(needRootKey){
			//在返回的map里加根节点键（如果需要）
			Map<String, Object> rootMap = new HashMap<String, Object>();
			rootMap.put(root.getName(), map);
			return rootMap;
		}
		return map;
	}

	/**
	 * xml转map 带属性
	 * @param xmlStr
	 * @param needRootKey 是否需要在返回的map里加根节点键
	 * @return
	 * @throws DocumentException
	 */
	public static Map xml2mapWithAttr(String xmlStr, boolean needRootKey) throws DocumentException {
		Document doc = DocumentHelper.parseText(xmlStr);
		Element root = doc.getRootElement();
		Map<String, Object> map = (Map<String, Object>) xml2mapWithAttr(root);
		if(root.elements().size()==0 && root.attributes().size()==0){
			return map; //根节点只有一个文本内容
		}
		if(needRootKey){
			//在返回的map里加根节点键（如果需要）
			Map<String, Object> rootMap = new HashMap<String, Object>();
			rootMap.put(root.getName(), map);
			return rootMap;
		}
		return map;
	}

	/**
	 * xml转map 不带属性
	 * @param e
	 * @return
	 */
	private static Map xml2map(Element e) {
		Map map = new LinkedHashMap();
		List list = e.elements();
		if (list.size() > 0) {
			for (int i = 0; i < list.size(); i++) {
				Element iter = (Element) list.get(i);
				List mapList = new ArrayList();

				if (iter.elements().size() > 0) {
					Map m = xml2map(iter);
					if (map.get(iter.getName()) != null) {
						Object obj = map.get(iter.getName());
						if (!(obj instanceof List)) {
							mapList = new ArrayList();
							mapList.add(obj);
							mapList.add(m);
						}
						if (obj instanceof List) {
							mapList = (List) obj;
							mapList.add(m);
						}
						map.put(iter.getName(), mapList);
					} else
						map.put(iter.getName(), m);
				} else {
					if (map.get(iter.getName()) != null) {
						Object obj = map.get(iter.getName());
						if (!(obj instanceof List)) {
							mapList = new ArrayList();
							mapList.add(obj);
							mapList.add(iter.getText());
						}
						if (obj instanceof List) {
							mapList = (List) obj;
							mapList.add(iter.getText());
						}
						map.put(iter.getName(), mapList);
					} else
						map.put(iter.getName(), iter.getText());
				}
			}
		} else
			map.put(e.getName(), e.getText());
		return map;
	}

	/**
	 * xml转map 带属性
	 * @param e
	 * @return
	 */
	private static Map xml2mapWithAttr(Element element) {
		Map<String, Object> map = new LinkedHashMap<String, Object>();

		List<Element> list = element.elements();
		List<Attribute> listAttr0 = element.attributes(); // 当前节点的所有属性的list
		for (Attribute attr : listAttr0) {
			map.put("@" + attr.getName(), attr.getValue());
		}
		if (list.size() > 0) {

			for (int i = 0; i < list.size(); i++) {
				Element iter = list.get(i);
				List mapList = new ArrayList();

				if (iter.elements().size() > 0) {
					Map m = xml2mapWithAttr(iter);
					if (map.get(iter.getName()) != null) {
						Object obj = map.get(iter.getName());
						if (!(obj instanceof List)) {
							mapList = new ArrayList();
							mapList.add(obj);
							mapList.add(m);
						}
						if (obj instanceof List) {
							mapList = (List) obj;
							mapList.add(m);
						}
						map.put(iter.getName(), mapList);
					} else
						map.put(iter.getName(), m);
				} else {

					List<Attribute> listAttr = iter.attributes(); // 当前节点的所有属性的list
					Map<String, Object> attrMap = null;
					boolean hasAttributes = false;
					if (listAttr.size() > 0) {
						hasAttributes = true;
						attrMap = new LinkedHashMap<String, Object>();
						for (Attribute attr : listAttr) {
							attrMap.put("@" + attr.getName(), attr.getValue());
						}
					}

					if (map.get(iter.getName()) != null) {
						Object obj = map.get(iter.getName());
						if (!(obj instanceof List)) {
							mapList = new ArrayList();
							mapList.add(obj);
							// mapList.add(iter.getText());
							if (hasAttributes) {
								attrMap.put("#text", iter.getText());
								mapList.add(attrMap);
							} else {
								mapList.add(iter.getText());
							}
						}
						if (obj instanceof List) {
							mapList = (List) obj;
							// mapList.add(iter.getText());
							if (hasAttributes) {
								attrMap.put("#text", iter.getText());
								mapList.add(attrMap);
							} else {
								mapList.add(iter.getText());
							}
						}
						map.put(iter.getName(), mapList);
					} else {
						// map.put(iter.getName(), iter.getText());
						if (hasAttributes) {
							attrMap.put("#text", iter.getText());
							map.put(iter.getName(), attrMap);
						} else {
							map.put(iter.getName(), iter.getText());
						}
					}
				}
			}
		} else {
			// 根节点的
			if (listAttr0.size() > 0) {
				map.put("#text", element.getText());
			} else {
				map.put(element.getName(), element.getText());
			}
		}
		return map;
	}
	
	/**
	 * map转xml map中没有根节点的键
	 * @param map
	 * @param rootName
	 * @throws DocumentException
	 * @throws IOException
	 */
	public static Document map2xml(Map<String, Object> map, String rootName) throws DocumentException, IOException  {
		Document doc = DocumentHelper.createDocument();
        Element root = DocumentHelper.createElement(rootName);
        doc.add(root);
        map2xml(map, root);
        //System.out.println(doc.asXML());
        //System.out.println(formatXml(doc));
        return doc;
	}
	
	/**
	 * map转xml map中含有根节点的键
	 * @param map
	 * @throws DocumentException
	 * @throws IOException
	 */
	public static Document map2xml(Map<String, Object> map) throws DocumentException, IOException  {
		Iterator<Map.Entry<String, Object>> entries = map.entrySet().iterator();
		if(entries.hasNext()){ //获取第一个键创建根节点
			Map.Entry<String, Object> entry = entries.next();
			Document doc = DocumentHelper.createDocument();
	        Element root = DocumentHelper.createElement(entry.getKey());
	        doc.add(root);
	        map2xml((Map)entry.getValue(), root);
	        //System.out.println(doc.asXML());
	        //System.out.println(formatXml(doc));
	        return doc;
		}
		return null;
	}
	
	/**
	 * map转xml
	 * @param map
	 * @param body xml元素
	 * @return
	 */
	private static Element map2xml(Map<String, Object> map, Element body) {
		Iterator<Map.Entry<String, Object>> entries = map.entrySet().iterator();
		while (entries.hasNext()) {
			Map.Entry<String, Object> entry = entries.next();
			String key = entry.getKey();
			Object value = entry.getValue();
			if(key.startsWith("@")){	//属性
				body.addAttribute(key.substring(1, key.length()), value.toString());
			} else if(key.equals("#text")){	//有属性时的文本
				body.setText(value.toString());
			} else {
				if(value instanceof java.util.List ){
					List list = (List)value;
					Object obj;
					for(int i=0; i<list.size(); i++){
						obj = list.get(i);
						//list里是map或String，不会存在list里直接是list的，
						if(obj instanceof java.util.Map){
							Element subElement = body.addElement(key);
							map2xml((Map)list.get(i), subElement);
						} else {
							body.addElement(key).setText((String)list.get(i));
						}
					}
				} else if(value instanceof java.util.Map ){
					Element subElement = body.addElement(key);
					map2xml((Map)value, subElement);
				} else {
					body.addElement(key).setText(value.toString());
				}
			}
			//System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());
		}
		return body;
	}
	
	/**
	 * 格式化输出xml
	 * @param xmlStr
	 * @return
	 * @throws DocumentException
	 * @throws IOException
	 */
	public static String formatXml(String xmlStr) throws DocumentException, IOException  {
		Document document = DocumentHelper.parseText(xmlStr);
		return formatXml(document);
	}
	
	/**
	 * 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("UTF-8");
		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();
	}

}

 

参考：

Java xml文件转换为map集合

http://my.oschina.net/u/2253208/blog/500877
java xml转map 高级版
http://xuelianbobo.iteye.com/blog/2153384