/**
* Copyright 2016 ZTE Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.openo.carbon.bpel.util;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.InputStream;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONObject;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
public class Xml2JsonUtil {
/**
* transform xml to json
*
* @param xml xml format string
* @return return json string when success; otherwise return null
*/
public static String xml2JSON(String xml) {
JSONObject obj = new JSONObject();
try {
InputStream is = new ByteArrayInputStream(xml.getBytes("utf-8"));
SAXBuilder sb = new SAXBuilder();
Document doc = sb.build(is);
Element root = doc.getRootElement();
obj.put(root.getName(), iterateElement(root));
return obj.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* transform xml file to json string
*
* @param file java.io.File is an effective xml file
* @return return json string when success; otherwise return null
*/
public static String xml2JSON(File file) {
JSONObject obj = new JSONObject();
try {
SAXBuilder sb = new SAXBuilder();
Document doc = sb.build(file);
Element root = doc.getRootElement();
obj.put(root.getName(), iterateElement(root));
return obj.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* an iteration function
*
* @param parentElement : org.jdom.Element
* @return java.util.Map
*/
@SuppressWarnings({"unchecked", "rawtypes"})
private static Map iterateElement(Element parentElement) {
List node = parentElement.getChildren();
Element element = null;
Map map = new HashMap();
List list = null;
for (int i = 0; i < node.size(); i++) {
element = (Element) node.get(i);
if (element.getTextTrim().equals("")) {
if (element.getChildren().size() == 0)
continue;
if (map.containsKey(element.getName())) {
Object obj = map.get(element.getName());
if (obj instanceof Map) {
list = new LinkedList();
list.add(obj);
list.add(iterateElement(element));
map.remove(element.getName());
map.put(element.getName(), list);
} else if (obj instanceof List) {
list = (List) obj;
list.add(iterateElement(element));
}
} else {
map.put(element.getName(), iterateElement(element));
}
} else {
map.put(element.getName(), element.getTextTrim());
}
}
return map;
}
public static void main(String[] args) {
System.out.println(Xml2JsonUtil.xml2JSON("" + "" + "" + "" + "" + "" + "" + "33333333"
+ "" + "" + "444" + "" + ""));
String xml =
" fdsafasdfasdf ";
System.out.println(Xml2JsonUtil.xml2JSON(xml));
xml =
" ? ";
System.out.println(Xml2JsonUtil.xml2JSON(xml));
xml =
"";
System.out.println(Xml2JsonUtil.xml2JSON(xml));
xml =
" 2 112 {\"e\":{\"f\":\"4\"}} ? 2 ? 223 334 2 [{\"b\":1},{\"c\":{\"d\":\"2\"}}}] [{\"a\":3},{\"e\":{\"f\":\"4\"}}}] ";
System.out.println(Xml2JsonUtil.xml2JSON(xml));
}
}