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XML和Map相互转换,
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import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Namespace;
import org.dom4j.QName;
import com.alibaba.fastjson.JSONObject;
public class XMLUtil {
public static void main(String[] args) throws UnsupportedEncodingException,DocumentException {
String xml = "<xml><return_code>SUCCESS</return_code><return_msg><![CDATA[OK]]></return_msg><appid><![CDATA[wx2421b1c4370ec43b]]></appid><mch_id><![CDATA[10000100]]></mch_id><nonce_str><![CDATA[IITRi8Iabbblz1Jc]]></nonce_str><sign><![CDATA[7921E432F65EB8ED0CE9755F0E86D72F]]></sign><result_code><![CDATA[SUCCESS]]></result_code><prepay_id><![CDATA[wx201411101639507cbf6ffd8b0779950874]]></prepay_id><trade_type><![CDATA[JSAPI]]></trade_type></xml>";
Map<String,Object> map = parseXml2Map(xml);
System.out.println(JSONObject.toJSON(map));
System.out.println(parseMap2XML(map,"xml"));
}
/**
* 将xml转换为map
* @param xml
* @return
*/
public static Map<String,Object> parseXml2Map(String xml) {
Document doc = null;
try {
doc = DocumentHelper.parseText(xml);
} catch (DocumentException e) {
e.printStackTrace();
}
Map<String,Object> map = (Map<String,Object>) xml2map(doc
.getRootElement());
return map;
}
/**
* 将map转换为xml
* @param vo
* @param rootElement
* @return
*/
public static String parseMap2XML(Map<String,Object> vo,String rootElement) {
org.dom4j.Document doc = DocumentHelper.createDocument();
Element body = DocumentHelper.createElement(rootElement);
doc.add(body);
buildMap2xmlBody(body,vo);
doc.setXMLEncoding("UTF-8");
// 去掉头部的 <?xml version="1.0" encoding="UTF-8"?> 或者换行
return doc.asXML().replaceAll("^<\\?xml.*\\?>|\n","");
}
private static void buildMap2xmlBody(Element body,Map<String,Object> vo) {
if (vo != null) {
Iterator<String> it = vo.keySet().iterator();
while (it.hasNext()) {
String key = (String) it.next();
if (key != null && !key.equals("")) {
Object obj = vo.get(key);
Element element = DocumentHelper.createElement(key);
if (obj != null) {
if (obj instanceof java.lang.String) {
element.setText((String) obj);
} else {
if (obj instanceof java.lang.Character
|| obj instanceof java.lang.Boolean
|| obj instanceof java.lang.Number
|| obj instanceof java.math.BigInteger
|| obj instanceof java.math.BigDecimal) {
org.dom4j.Attribute attr = DocumentHelper
.createAttribute(element,"type",obj
.getClass().getCanonicalName());
element.add(attr);
element.setText(String.valueOf(obj));
} else if (obj instanceof java.util.Map) {
org.dom4j.Attribute attr = DocumentHelper
.createAttribute(element,java.util.Map.class
.getCanonicalName());
element.add(attr);
buildMap2xmlBody(element,(Map<String,Object>) obj);
} else {
}
}
}
body.add(element);
}
}
}
}
private static Object xml2map(Element element) {
Map<String,Object> map = new HashMap<String,Object>();
List<Element> elements = element.elements();
if (elements.size() == 0) {
map.put(element.getName(),element.getText());
if (!element.isRootElement()) {
return element.getText();
}
} else if (elements.size() == 1) {
map.put(elements.get(0).getName(),xml2map(elements.get(0)));
} else if (elements.size() > 1) {
// 多个子节点的话就得考虑list的情况了,比如多个子节点有节点名称相同的
// 构造一个map用来去重
Map<String,Element> tempMap = new HashMap<String,Element>();
for (Element ele : elements) {
tempMap.put(ele.getName(),ele);
}
Set<String> keySet = tempMap.keySet();
for (String string : keySet) {
Namespace namespace = tempMap.get(string).getNamespace();
List<Element> elements2 = element.elements(new QName(string,namespace));
// 如果同名的数目大于1则表示要构建list
if (elements2.size() > 1) {
List<Object> list = new ArrayList<Object>();
for (Element ele : elements2) {
list.add(xml2map(ele));
}
map.put(string,list);
} else {
// 同名的数量不大于1则直接递归去
map.put(string,xml2map(elements2.get(0)));
}
}
}
return map;
}
}