Xml格式数据转map工具类

前言【

　　最近在写一个业务，由于调UPS物流的接口返回的是一个xml格式的数据结果，我现在要拿到xml中某个节点的值，而这个xml数据是多节点多层级的，并且这某个节点的值有可能只有一条值，有可能有多条，如下：

　　大概是这样的结构：为了简要，我做简单显示，真正的结构层级跟这差不多

<class>
    <student>
        <name>aaaaaa</name>
        <girlfriend>bbb</girlfriend>
        <girlfriend>ccc</girlfriend>
    </student>
</class>  

>>>>由于girlfriend的值是不确定的，有可能一个，或多个>>>> 

<class>
    <student>
        <name>aaaaaa</name>
        <girlfriend>bbb</girlfriend>
    </student>
</class> 

//现在要把当前xml转成map,并且还要遍历map，拿到girlfriend的值，于girlfriend的值有可能是多个
//所以当xml中的节点girlfriend的值不同时，我们都要解析成多层级的map，并拿到girlfriend的值
         

　】　　

　

网上百度了很久，终于找到一位大神写的一个xml转map的工具，并且还附带从map中查找某层级的子节点数据，借鉴博客：https://blog.csdn.net/lmb55/article/details/77507385

我在他的方法上做了一些小改动，因为我要根据classs>student>girlfriend拿到一个这样{girlfriend=[bbb, ccc]}，或{girlfriend=[bbb]}，所以不管一个值还是多个值我都要放到map中的list中，但他的map取list数据方法只能取一到一个list值如[bbb, ccc]

好了，来解析一下：

　　第一步：把xml转map方法：

/**
     * 将Element对象转为Map（String→Document→Element→Map）
     * @param Element
     * @return
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    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(), mapList); 
                    }else  
                        map.put(iter.getName(), iter.getText());//公共map resultCode=0
                }  
            }  
        }else  
            map.put(e.getName(), e.getText());  
        return map;  
    }

//调用上面的xml转map方法：

//xml转map
SAXReader saxReader = new SAXReader();
Document document = saxReader.read(new ByteArrayInputStream(respXml.getBytes()));
Element incomingForm = document.getRootElement();
Map map = Dom2Map(incomingForm);
System.out.println("map >>> "+ map);

/*
* {resultMsg=成功, orderOffer={offer={offerSpecName=980010992)商务助手（OCS）30元, endDt=3000-1-1 0:00:00, startDt=2012-11-27 16:48:12, offerSpecId=980010992, params={param=[{offerParamId=101000048281, itemSpecName=计费区分, itemSpecId=5030, value=CDMA预付费}, {offerParamId=101000048282, itemSpecName=经分区分, itemSpecId=5031, value=天翼商话}]}, offerId=105000808918}}, resultCode=0, saleOffer={categoryNode={offer=[{summary=待定..., id=980001995, name=(980001995)商务助手（OCS）201209版-30元}, {summary=待定..., id=980001996, name=(980001996)商务助手（OCS）201209版-50元}, {summary=待定..., id=980001997, name=(980001997)商务助手（OCS）201209版-80元}, {summary=待定..., id=980010993, name=(980010993)商务助手（OCS）50元}]}}}
*/

　　第二步：xml已经转成map数据结构了，下面要根据节点的层级路径，拿到你想要的节点值

/**
     * 将多结点多层级的Map转为多包体的list集合
     * @param respStr
     * @param listNode
     * @return
     */
    @SuppressWarnings("unchecked")
    public static Map<String, List<String>> map2ListbyHandler(Map respStr,String listNode){
        List<String> resultList = new ArrayList<String>();
        
        Map<String, List<String>> resultMap = new HashMap<>();
        
        Map map = respStr;
        String[] strArray = listNode.split(">");
        String key = null;
        Object value = null;
        for (int i = 0; i < strArray.length; i++) {
            if (map.get(strArray[i]) instanceof List) {
                if (i < strArray.length && null != map.get(strArray[i]) && "" != map.get(strArray[i])) {
                    Map<String,Object> mapList = map;
                    if (((List<Map<String,Object>>)mapList.get(strArray[i])).size() > 0) {
                        
//                            Map mapj = new HashMap();
                            
//                            List<Map<String,Object>> list = ((List<Map<String,Object>>)mapList.get(strArray[i]));
                            
                            resultList = ((List<String>)mapList.get(strArray[i]));
                            if(resultList.size() > 0){
                                resultMap.put(strArray[i], resultList);
                            }
                            return resultMap;
                    }
                }
                break;
            }else{
                if (i < strArray.length - 1 && null != map.get(strArray[i]) && "" != map.get(strArray[i])) {
                    map = (Map) map.get(strArray[i]);
                }else{
                    //说明没有此节点只有一个值，直接从map里把值取出放resultList中
                    resultList.add(map.get(strArray[i]).toString());
                    resultMap.put(strArray[i], resultList);//listNode
                }
            }
        }
        return resultMap;
    }

//调用上面的遍历map取数据方法：原博客返回的是一个list，我给改成了map，因为我想要{girlfriend=[bbb, ccc]}，或{girlfriend={bbb}}这种结果数据，方便我根据节点名称取值
System.out.println("***************从map中将单个节点的值查找出来*********************");
//map转list
Map resultMap = XmlToMapUtil01.map2ListbyHandler(map,"student>age");
System.out.println(resultMap.toString());

》》》》》》》》》》》》》》》》》》》》》》》》》》》》

好了，下面放上全部代码，一个XmlToMapUtil01.java工具类代码，和一个TestXmlToMap01.java用来测试工具类的文件

XmlToMapUtil01.java工具类

package com.saoptest.test03;

import java.io.ByteArrayInputStream;
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.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;



public class XmlToMapUtil01 {
    
    
    
    
     /**
     * 将Document对象转为Map（String→Document→Map）
     * @param Document
     * @return
     */
    @SuppressWarnings("rawtypes")
    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();  
            //System.out.println(e.getName());  
            List list = e.elements();  
            if(list.size() > 0){  
                map.put(e.getName(), Dom2Map(e));  
            }else  
                map.put(e.getName(), e.getText());  
        }  
        return map;  
    }

    /**
     * 将Element对象转为Map（String→Document→Element→Map）
     * @param Element
     * @return
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    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(), mapList); 
                    }else  
                        map.put(iter.getName(), iter.getText());//公共map resultCode=0
                }  
            }  
        }else  
            map.put(e.getName(), e.getText());  
        return map;  
    }
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    //=========================上面是单节点多层级的xml转map====================================
    
    
    
    //=========================下面是多节点多层级的xml转map====================================
    
    
    /**
     * 将多结点多层级的Map转为多包体的list集合
     * @param respStr
     * @param listNode
     * @return
     */
    @SuppressWarnings("unchecked")
    public static Map<String, List<String>> map2ListbyHandler(Map respStr,String listNode){
        List<String> resultList = new ArrayList<String>();
        
        Map<String, List<String>> resultMap = new HashMap<>();
        
        Map map = respStr;
        String[] strArray = listNode.split(">");
        String key = null;
        Object value = null;
        for (int i = 0; i < strArray.length; i++) {
            if (map.get(strArray[i]) instanceof List) {
                if (i < strArray.length && null != map.get(strArray[i]) && "" != map.get(strArray[i])) {
                    Map<String,Object> mapList = map;
                    if (((List<Map<String,Object>>)mapList.get(strArray[i])).size() > 0) {
                        
//                            Map mapj = new HashMap();
                            
//                            List<Map<String,Object>> list = ((List<Map<String,Object>>)mapList.get(strArray[i]));
                            
                            resultList = ((List<String>)mapList.get(strArray[i]));
                            if(resultList.size() > 0){
                                resultMap.put(strArray[i], resultList);
                            }
                            return resultMap;
                    }
                }
                break;
            }else{
                if (i < strArray.length - 1 && null != map.get(strArray[i]) && "" != map.get(strArray[i])) {
                    map = (Map) map.get(strArray[i]);
                }else{
                    //说明没有此节点只有一个值，直接从map里把值取出放resultList中
                    resultList.add(map.get(strArray[i]).toString());
                    resultMap.put(strArray[i], resultList);//listNode
                }
            }
        }
        return resultMap;
    }

    
    
    //===============map测试==========================
    
    public static void main(String[] args) {
        StringBuffer sb = new StringBuffer();
        sb.append("<response>");
        sb.append(" <resultCode>0</resultCode>");
        sb.append(" <resultMsg>成功</resultMsg>");
        sb.append(" <orderOffer>");
        sb.append("     <offer>");
        sb.append("         <offerId>105000808918</offerId>");
        sb.append("         <offerSpecId>980010992</offerSpecId>");
        sb.append("         <offerSpecName>980010992)商务助手（OCS）30元</offerSpecName>");
        sb.append("         <startDt>2012-11-27 16:48:12</startDt>");
        sb.append("         <endDt>3000-1-1 0:00:00</endDt>");
        sb.append("         <params>");
        sb.append("             <param>");
        sb.append("                 <offerParamId>101000048281</offerParamId>");
        sb.append("                 <itemSpecId>5030</itemSpecId>");
        sb.append("                 <itemSpecName>计费区分</itemSpecName>");
        sb.append("                 <value>CDMA预付费</value>");
        sb.append("             </param>");
        sb.append("             <param>");
        sb.append("                 <offerParamId>101000048282</offerParamId>");
        sb.append("                 <itemSpecId>5031</itemSpecId>");
        sb.append("                 <itemSpecName>经分区分</itemSpecName>");
        sb.append("                 <value>天翼商话</value>");
        sb.append("             </param>");
        sb.append("         </params>");
        sb.append("     </offer>");
        sb.append(" </orderOffer>");
        sb.append(" <saleOffer>");
        sb.append("     <categoryNode id = "100472">");
        sb.append("         <offer>");
        sb.append("             <id>980001995</id>");
        sb.append("             <name>(980001995)商务助手（OCS）201209版-30元</name>");
        sb.append("             <summary>待定...</summary>");
        sb.append("         </offer>");
        sb.append("         <offer>");
        sb.append("             <id>980001996</id>");
        sb.append("             <name>(980001996)商务助手（OCS）201209版-50元</name>");
        sb.append("             <summary>待定...</summary>");
        sb.append("         </offer>");
        sb.append("         <offer>");
        sb.append("             <id>980001997</id>");
        sb.append("             <name>(980001997)商务助手（OCS）201209版-80元</name>");
        sb.append("             <summary>待定...</summary>");
        sb.append("         </offer>");
        sb.append("         <offer>");
        sb.append("             <id>980010993</id>");
        sb.append("             <name>(980010993)商务助手（OCS）50元</name>");
        sb.append("             <summary>待定...</summary>");
        sb.append("         </offer>");
        sb.append("     </categoryNode>");
        sb.append(" </saleOffer>");
        sb.append("</response>");
        String respXml = sb.toString();
        try {
            //xml转map
            SAXReader saxReader = new SAXReader();
            Document document = saxReader.read(new ByteArrayInputStream(respXml.getBytes()));
            Element incomingForm = document.getRootElement();
            Map map =  Dom2Map(incomingForm);
            System.out.println("map >>> "+ map);
            /*
             * {resultMsg=成功, orderOffer={offer={offerSpecName=980010992)商务助手（OCS）30元, endDt=3000-1-1 0:00:00, startDt=2012-11-27 16:48:12, offerSpecId=980010992, params={param=[{offerParamId=101000048281, itemSpecName=计费区分, itemSpecId=5030, value=CDMA预付费}, {offerParamId=101000048282, itemSpecName=经分区分, itemSpecId=5031, value=天翼商话}]}, offerId=105000808918}}, resultCode=0, saleOffer={categoryNode={offer=[{summary=待定..., id=980001995, name=(980001995)商务助手（OCS）201209版-30元}, {summary=待定..., id=980001996, name=(980001996)商务助手（OCS）201209版-50元}, {summary=待定..., id=980001997, name=(980001997)商务助手（OCS）201209版-80元}, {summary=待定..., id=980010993, name=(980010993)商务助手（OCS）50元}]}}}
             */
            System.out.println("***************从map中将单个节点的值查找出来*********************");
            //map转list
            map2ListbyHandler(map,"saleOffer>categoryNode>offer>id");
            /*
             * resultList >>> [{id=980001995}, {id=980001996}, {id=980001997}, {id=980010993}]
             */
            System.out.println("***************从map中将节点集合中的所有节点值都查找出来*******************************");
            List<String> nodeList = new ArrayList<String>();
            nodeList.add("resultCode");
            nodeList.add("resultMsg");
            nodeList.add("orderOffer>offer>offerSpecName");
            nodeList.add("orderOffer>offer>endDt");
            nodeList.add("orderOffer>offer>startDt");
            nodeList.add("orderOffer>offer>offerSpecId");
            nodeList.add("orderOffer>offer>offerId");
            nodeList.add("orderOffer>offer>params>param>offerParamId");
            nodeList.add("orderOffer>offer>params>param>itemSpecName");
            nodeList.add("orderOffer>offer>params>param>itemSpecId");
            nodeList.add("orderOffer>offer>params>param>value");
            nodeList.add("saleOffer>categoryNode>offer>id");
            nodeList.add("saleOffer>categoryNode>offer>summary");
            nodeList.add("saleOffer>categoryNode>offer>name");
//            str2ListbyHandler(nodeList,respXml);
            /**
             * [{offerParamId=101000048281, summary=待定..., endDt=3000-1-1 0:00:00, itemSpecId=5031, id=980001995, resultMsg=成功, 
             *      itemSpecName=经分区分, offerSpecName=980010992)商务助手（OCS）30元, offerSpecId=980010992, startDt=2012-11-27 16:48:12, 
             *      name=(980010993)商务助手（OCS）50元, resultCode=0, value=天翼商话, offerId=105000808918}, 
             * {offerParamId=101000048282, summary=待定..., endDt=3000-1-1 0:00:00, itemSpecId=5031, id=980001995, resultMsg=成功, 
             *      itemSpecName=经分区分, offerSpecName=980010992)商务助手（OCS）30元, offerSpecId=980010992, startDt=2012-11-27 16:48:12, 
             *      name=(980010993)商务助手（OCS）50元, resultCode=0, value=天翼商话, offerId=105000808918}, 
             * {offerParamId=101000048281, summary=待定..., endDt=3000-1-1 0:00:00, itemSpecId=5031, id=980001996, resultMsg=成功, 
             *      itemSpecName=经分区分, offerSpecName=980010992)商务助手（OCS）30元, offerSpecId=980010992, startDt=2012-11-27 16:48:12, 
             *      name=(980010993)商务助手（OCS）50元, resultCode=0, value=天翼商话, offerId=105000808918}, 
             * {offerParamId=101000048282, summary=待定..., endDt=3000-1-1 0:00:00, itemSpecId=5031, id=980001996, resultMsg=成功, 
             *      itemSpecName=经分区分, offerSpecName=980010992)商务助手（OCS）30元, offerSpecId=980010992, startDt=2012-11-27 16:48:12, 
             *      name=(980010993)商务助手（OCS）50元, resultCode=0, value=天翼商话, offerId=105000808918}, 
             * {offerParamId=101000048281, summary=待定..., endDt=3000-1-1 0:00:00, itemSpecId=5031, id=980001997, resultMsg=成功, 
             *      itemSpecName=经分区分, offerSpecName=980010992)商务助手（OCS）30元, offerSpecId=980010992, startDt=2012-11-27 16:48:12, 
             *      name=(980010993)商务助手（OCS）50元, resultCode=0, value=天翼商话, offerId=105000808918}, 
             * {offerParamId=101000048282, summary=待定..., endDt=3000-1-1 0:00:00, itemSpecId=5031, id=980001997, resultMsg=成功, 
             *      itemSpecName=经分区分, offerSpecName=980010992)商务助手（OCS）30元, offerSpecId=980010992, startDt=2012-11-27 16:48:12,
             *       name=(980010993)商务助手（OCS）50元, resultCode=0, value=天翼商话, offerId=105000808918}, 
             * {offerParamId=101000048281, summary=待定..., endDt=3000-1-1 0:00:00, itemSpecId=5031, id=980010993, resultMsg=成功, 
             *      itemSpecName=经分区分, offerSpecName=980010992)商务助手（OCS）30元, offerSpecId=980010992, startDt=2012-11-27 16:48:12, 
             *      name=(980010993)商务助手（OCS）50元, resultCode=0, value=天翼商话, offerId=105000808918}, 
             * {offerParamId=101000048282, summary=待定..., endDt=3000-1-1 0:00:00, itemSpecId=5031, id=980010993, resultMsg=成功, 
             *      itemSpecName=经分区分, offerSpecName=980010992)商务助手（OCS）30元, offerSpecId=980010992, startDt=2012-11-27 16:48:12, 
             *      name=(980010993)商务助手（OCS）50元, resultCode=0, value=天翼商话, offerId=105000808918}]
             */
        } catch (DocumentException e) {
            e.printStackTrace();
        }
    } 
    
    
    
    
    
    

}

TestXmlToMap01.java

package com.saoptest.test03;

import java.io.ByteArrayInputStream;
import java.util.List;
import java.util.Map;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class TestXmlToMap01 {

    public static void main(String[] args) throws Exception {
        //xml转json
        String xml = "<class><student><name>aaaaaa</name><girlfriend>bbb</girlfriend><girlfriend>ccc</girlfriend></student></class>";
//        String xml = "<class><student><name>aaaaaa</name><girlfriend>bbb</girlfriend></student></class>";
//        String xml = "<class><student><name>aaaaaa</name><age>21</age></student><student><name>bbbbbb</name><age>22</age></student></class>";
//        String xml = "<class><student><name>aaaaaa</name><age>21</age></student></class>";
            
        //xml转map
        SAXReader saxReader = new SAXReader();
        Document document = saxReader.read(new ByteArrayInputStream(xml.getBytes()));
        Element incomingForm = document.getRootElement();
        Map map =  XmlToMapUtil01.Dom2Map(incomingForm);
        System.out.println("map >>> "+ map);
        /*
         * {resultMsg=成功, orderOffer={offer={offerSpecName=980010992)商务助手（OCS）30元, endDt=3000-1-1 0:00:00, startDt=2012-11-27 16:48:12, offerSpecId=980010992, params={param=[{offerParamId=101000048281, itemSpecName=计费区分, itemSpecId=5030, value=CDMA预付费}, {offerParamId=101000048282, itemSpecName=经分区分, itemSpecId=5031, value=天翼商话}]}, offerId=105000808918}}, resultCode=0, saleOffer={categoryNode={offer=[{summary=待定..., id=980001995, name=(980001995)商务助手（OCS）201209版-30元}, {summary=待定..., id=980001996, name=(980001996)商务助手（OCS）201209版-50元}, {summary=待定..., id=980001997, name=(980001997)商务助手（OCS）201209版-80元}, {summary=待定..., id=980010993, name=(980010993)商务助手（OCS）50元}]}}}
         */
        System.out.println("***************从map中将单个节点的值查找出来*********************");
        //map转list
        Map<String, List<String>> resultMap = XmlToMapUtil01.map2ListbyHandler(map,"student>girlfriend");
        List<String> list = resultMap.get("girlfriend");
        
        System.out.println("resultMap=" + resultMap.toString());
        
        if(!"null".equals(resultMap.get("girlfriend").toString())){
            System.out.println("有数据：" + resultMap.get("girlfriend"));
        }else{
            System.out.println("没数据：" + resultMap.get("girlfriend"));
        }
        
//        Map<String, List<String>> map1 = new HashMap<String, List<String>>();
//        List<String> lists = new ArrayList<String>();
//        lists.add("bbb");
//        lists.add("ccc");
//        map1.put("girlfriend", lists);
//        System.out.println("map1====" + map1.toString());
//        System.out.println(map1.get("girlfriend"));
//        System.out.println(map1.get("girlfriend").get(0) + "=====" + map1.get("girlfriend").get(1));
//        
        

        
    }
    
    
    
}