java利用dom4j将xml字符串转换为json

  1 import java.util.HashMap;

  2 import java.util.LinkedList;

  3 import java.util.List;

  4 import java.util.Map;

  5 

  6 import org.dom4j.Document;

  7 import org.dom4j.DocumentHelper;

  8 import org.dom4j.Element;

  9 

 10 import net.sf.json.JSONObject;

 11 

 12 public class Xml2JsonUtil {

 13     

 14     

 15     /**

 16      * 转换一个xml格式的字符串到json格式

 17      * 

 18      * @param xml

 19      *            xml格式的字符串

 20      * @return 成功返回json 格式的字符串;失败反回null

 21      */

 22     @SuppressWarnings("unchecked")

 23     public static  String xml2JSON(String xml) {

 24         JSONObject obj = new JSONObject();

 25         try {

 26             Document doc = DocumentHelper.parseText(xml);

 27             Element root = doc.getRootElement();

 28             obj.put(root.getName(), iterateElement(root));

 29             return obj.toString();

 30         } catch (Exception e) {

 31             e.printStackTrace();

 32             return null;

 33         }

 34     }

 35 

 36     /**

 37      * 一个迭代方法

 38      * 

 39      * @param element

 40      * @return java.util.Map 实例

 41      */

 42     @SuppressWarnings("unchecked")

 43     private static Map  iterateElement(Element element) {

 44         List jiedian = element.elements();

 45         Element et = null;

 46         Map obj = new HashMap();

 47         Object temp;

 48         List list = null;

 49         for (int i = 0; i < jiedian.size(); i++) {

 50             list = new LinkedList();

 51             et = (Element) jiedian.get(i);

 52             if (et.getTextTrim().equals("")) {

 53                 if (et.elements().size() == 0)

 54                     continue;

 55                 if (obj.containsKey(et.getName())) {

 56                     temp = obj.get(et.getName());

 57                     if(temp instanceof List){

 58                         list = (List)temp;

 59                         list.add(iterateElement(et));

 60                     }else if(temp instanceof Map){

 61                         list.add((HashMap)temp);

 62                         list.add(iterateElement(et));

 63                     }else{

 64                         list.add((String)temp);

 65                         list.add(iterateElement(et));

 66                     }

 67                     obj.put(et.getName(), list);

 68                 }else{

 69                     obj.put(et.getName(), iterateElement(et));

 70                 }

 71             } else {

 72                 if (obj.containsKey(et.getName())) {

 73                     temp = obj.get(et.getName());

 74                     if(temp instanceof List){

 75                         list = (List)temp;

 76                         list.add(et.getTextTrim());

 77                     }else if(temp instanceof Map){

 78                         list.add((HashMap)temp);

 79                         list.add(iterateElement(et));

 80                     }else{

 81                         list.add((String)temp);

 82                         list.add(et.getTextTrim());

 83                     }

 84                     obj.put(et.getName(), list);

 85                 }else{

 86                     obj.put(et.getName(), et.getTextTrim());

 87                 }

 88                 

 89             }

 90             

 91         }

 92         return obj;

 93     }

 94     

 95     // 测试

 96     public static void main(String[] args) {

 97         String xmlStr = "<getOmElement>" +

 98         "<HEADER>" +

 99         "<SOURCEID>MDM</SOURCEID>" +

100         "<SOURCEID>MDM</SOURCEID>" +

101         "<myChild/>"+

102         "<DESTINATIONID>DAXT</DESTINATIONID>" +

103         "<SIZE>1</SIZE>" +

104         "<TYPE>ADD</TYPE>" +

105         "<BO>ORG</BO>" +

106         "<CHECK>"+

107         "checkCode"

108         +"</CHECK>"+

109         "</HEADER>" +

110         "<REQUEST>" +

111         "<DATAROW>" +

112         "<ORGUUID>460c5239-13f662e8f67-2f1936027f000a1d675dd1399911234</ORGUUID>" +

113         "</DATAROW>" +    

114         "<DATAROW>" +

115         "<ORGUUID>460c5239-13f662e8f67-2f1936027f000a1d675dd139991369c4</ORGUUID>" +

116         "</DATAROW>" +    

117         "</REQUEST>" +

118         "</getOmElement>";

119         

120         System.out.println(Xml2JsonUtil.xml2JSON(xmlStr));

121     }

122 }