一个xml和map相互转换的工具类

一个xml和map相互转换的工具类，依赖dom4j

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


import org.apache.commons.io.FileUtils;
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和map相互转换的工具类
 * @author zhouxuke
 *
 */
public class XmlUtil {

/**
* 把原始的xml转换成map key为节点的路径，值为节点值 ，遇到重复节点用”[数字]“标识第几个节点
* 如:test1test2 会转换成
* /xml/list[1]/test=test1 /xml/list[2]/test=test2
* @param message
* @return
*/
public static Map xml2Map(String message) {
Map data = new LinkedHashMap();
Document doc = null;
try {
doc = DocumentHelper.parseText(message);
}
catch (DocumentException e) {
e.printStackTrace();
}

Element root = doc.getRootElement();
String path = "/" + root.getName();
element2Map(root, data, path);
return data;
}

private static void element2Map(Element ele, Map data, String path) {
if(ele == null) {
return;
}
List childrens = ele.elements();
if(childrens != null && childrens.size() > 0) {
Element pre = null;
Element cur = null;
Element next = null;
int nodeIndex = 1;
int length = childrens.size();
for (int i = 0; i < length; i++) {
cur = childrens.get(i);
String nodePath = path + "/" + cur.getName();
if(pre == null) {
next = childrens.get(i + 1);
if(next.getName().equals(cur.getName())) {
nodePath += "[" + nodeIndex + "]";
nodeIndex++;
}
}
else {
if(pre.getName().equals(cur.getName())) {
nodePath += "[" + nodeIndex + "]";
nodeIndex++;
}
else {
nodeIndex = 1;
}
}
element2Map(cur, data, nodePath);
pre = cur;
}
}
else {

data.put(path, ele.getText());

}

}

/**
* 把map转换成xml
* @param map
* @return
*/
public static String map2Xml(Map map) {
String xml = "";
//根据map用dom4j创建Document
Document doc = DocumentHelper.createDocument();
Iterator> it = map.entrySet().iterator();
while (it.hasNext()) {
Entry e = it.next();
String key = e.getKey();
String value = e.getValue();

Element ele = DocumentHelper.makeElement(doc, key);
ele.setText(value);
}

//格式化
OutputFormat format = OutputFormat.createPrettyPrint();
//format.setNewLineAfterDeclaration(true);
format.setExpandEmptyElements(false);
StringWriter out = new StringWriter();
XMLWriter writer = new XMLWriter(out, format);
try {
writer.write(doc);
}
catch (IOException e) {
e.printStackTrace();
}
xml = out.toString();
xml = xml.replaceAll("\\[\\d*\\]", "");
return xml;
}

public static void main(String[] args) {
File file = new File("C:/Users/zhouxuke/Desktop/test.xml");
try {
String message = FileUtils.readFileToString(file, "utf-8");
Map map = xml2Map(message);

System.out.println(map2Xml(map));
}
catch (IOException e) {
e.printStackTrace();
}
}

}