- package com.shine.framework.core.util;
- import java.io.ByteArrayOutputStream;
- import java.util.ArrayList;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Map;
- import net.sf.json.JSON;
- import net.sf.json.JSONSerializer;
- import net.sf.json.xml.XMLSerializer;
- import org.dom4j.Document;
- import org.dom4j.DocumentHelper;
- import org.dom4j.Element;
- import org.dom4j.io.OutputFormat;
- import org.dom4j.io.XMLWriter;
- /**
- * common xml conver utility
- *
- * @author viruscodecn@gmail.com
- * @version Framework 2010.10.26
- * @url http://blog.csdn.net/arjick/article/details/6251777
- */
- public class XmlConverUtil {
- /**
- * map to xml xml <node><key label="key1">value1</key><key
- * label="key2">value2</key>......</node>
- *
- * @param map
- * @return
- */
- public static String maptoXml(Map map) {
- Document document = DocumentHelper.createDocument();
- Element nodeElement = document.addElement("node");
- for (Object obj : map.keySet()) {
- Element keyElement = nodeElement.addElement("key");
- keyElement.addAttribute("label",String.valueOf(obj));
- keyElement.setText(String.valueOf(map.get(obj)));
- }
- return doc2String(document);
- }
- /**
- * list to xml xml <nodes><node><key label="key1">value1</key><key
- * label="key2">value2</key>......</node><node><key
- * label="key1">value1</key><key
- * label="key2">value2</key>......</node></nodes>
- *
- * @param list
- * @return
- */
- public static String listtoXml(List list) throws Exception {
- Document document = DocumentHelper.createDocument();
- Element nodesElement = document.addElement("nodes");
- int i = 0;
- for (Object o : list) {
- Element nodeElement = nodesElement.addElement("node");
- if (o instanceof Map) {
- for (Object obj : ((Map) o).keySet()) {
- Element keyElement = nodeElement.addElement("key");
- keyElement.addAttribute("label",String.valueOf(obj));
- keyElement.setText(String.valueOf(((Map) o).get(obj)));
- }
- } else {
- Element keyElement = nodeElement.addElement("key");
- keyElement.addAttribute("label",String.valueOf(i));
- keyElement.setText(String.valueOf(o));
- }
- i++;
- }
- return doc2String(document);
- }
- /**
- * json to xml {"node":{"key":{"@label":"key1","#text":"value1"}}} conver
- * <o><node class="object"><key class="object"
- * label="key1">value1</key></node></o>
- *
- * @param json
- * @return
- */
- public static String jsontoXml(String json) {
- try {
- XMLSerializer serializer = new XMLSerializer();
- JSON jsonObject = JSONSerializer.toJSON(json);
- return serializer.write(jsonObject);
- } catch (Exception e) {
- e.printStackTrace();
- }
- return null;
- }
- /**
- * xml to map xml <node><key label="key1">value1</key><key
- * label="key2">value2</key>......</node>
- *
- * @param xml
- * @return
- */
- public static Map xmltoMap(String xml) {
- try {
- Map map = new HashMap();
- Document document = DocumentHelper.parseText(xml);
- Element nodeElement = document.getRootElement();
- List node = nodeElement.elements();
- for (Iterator it = node.iterator(); it.hasNext();) {
- Element elm = (Element) it.next();
- map.put(elm.attributeValue("label"),elm.getText());
- elm = null;
- }
- node = null;
- nodeElement = null;
- document = null;
- return map;
- } catch (Exception e) {
- e.printStackTrace();
- }
- return null;
- }
- /**
- * xml to list xml <nodes><node><key label="key1">value1</key><key
- * label="key2">value2</key>......</node><node><key
- * label="key1">value1</key><key
- * label="key2">value2</key>......</node></nodes>
- *
- * @param xml
- * @return
- */
- public static List xmltoList(String xml) {
- try {
- List<Map> list = new ArrayList<Map>();
- Document document = DocumentHelper.parseText(xml);
- Element nodesElement = document.getRootElement();
- List nodes = nodesElement.elements();
- for (Iterator its = nodes.iterator(); its.hasNext();) {
- Element nodeElement = (Element) its.next();
- Map map = xmltoMap(nodeElement.asXML());
- list.add(map);
- map = null;
- }
- nodes = null;
- nodesElement = null;
- document = null;
- return list;
- } catch (Exception e) {
- e.printStackTrace();
- }
- return null;
- }
- /**
- * xml to json <node><key label="key1">value1</key></node> 转化为
- * {"key":{"@label":"key1","#text":"value1"}}
- *
- * @param xml
- * @return
- */
- public static String xmltoJson(String xml) {
- XMLSerializer xmlSerializer = new XMLSerializer();
- return xmlSerializer.read(xml).toString();
- }
- /**
- *
- * @param document
- * @return
- */
- public static String doc2String(Document document) {
- String s = "";
- try {
- // 使用输出流来进行转化
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- // 使用UTF-8编码
- OutputFormat format = new OutputFormat(" ",true,"UTF-8");
- XMLWriter writer = new XMLWriter(out,format);
- writer.write(document);
- s = out.toString("UTF-8");
- } catch (Exception ex) {
- ex.printStackTrace();
- }
- return s;
- }
- }
将xml转换成Map,能够应对不用结构的xml,而不是只针对固定格式的xml.
转换规则:
1.主要是Map与List的互相嵌套
2.同名称的节点会被装进List
示例:
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.dom4j.Document;
import org.dom4j.Element;
public class XmlUtils {
@SuppressWarnings("unchecked")
public static Map<String,Object> Dom2Map(Document doc){
Map<String,Object> map = new HashMap<String,Object>();
if(doc == null)
return map;
Element root = doc.getRootElement();
for (Iterator iterator = root.elementIterator(); iterator.hasNext();) {
Element e = (Element) iterator.next();
List list = e.elements();
if(list.size() > 0){
map.put(e.getName(),Dom2Map(e));
}else
map.put(e.getName(),e.getText());
}
return map;
}
@SuppressWarnings("unchecked")
public static Map Dom2Map(Element e){
Map map = new HashMap();
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 = Dom2Map(iter);
if(map.get(iter.getName()) != null){
Object obj = map.get(iter.getName());
if(!obj.getClass().getName().equals("java.util.ArrayList")){
mapList = new ArrayList();
mapList.add(obj);
mapList.add(m);
}
if(obj.getClass().getName().equals("java.util.ArrayList")){
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.getClass().getName().equals("java.util.ArrayList")){
mapList = new ArrayList();
mapList.add(obj);
mapList.add(iter.getText());
}
if(obj.getClass().getName().equals("java.util.ArrayList")){
mapList = (List) obj;
mapList.add(iter.getText());
}
map.put(iter.getName(),iter.getText());
}
}
}else
map.put(e.getName(),e.getText());
return map;
}
}
测试类:
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Map;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
public class XmlToMapDemo {
public static void main(String[] args) throws IOException,
DocumentException {
FileInputStream fis = new FileInputStream("d://a.xml");
byte[] b = new byte[fis.available()];
fis.read(b);
String str = new String(b);
Document doc = DocumentHelper.parseText(str);
System.out.println(doc.asXML());
long beginTime = System.currentTimeMillis();
Map<String,Object> map = XmlUtils.Dom2Map(doc);
System.out.println(map.toString());
System.out.println("Use time:"+(System.currentTimeMillis()-beginTime));
} }