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http://ziyu-1.iteye.com/blog/469003
传过来一个xml文件,需要转换成Map,能够应对不用结构的xml,而不是只针对固定格式的xml.
转换规则:
1.主要是Map与List的互相嵌套
2.同名称的节点会被装进List
如下面的xml文件:
1 <?xml version="1.0" encoding="UTF-8"?> 2 <GmMail> 3 <template_id>2</template_id> 4 <to_address>test@corp.gm.com</to_address> 5 <to_alias>tom</to_alias> 6 <message>XML-未来世界 Message</message> 7 <recipient_name>xml-tom</recipient_name> 8 <send_address>xml-test@163.com</send_address> 9 <sender_comp_name>xml-gm</sender_comp_name> 10 <subject>xml-hello guys</subject> 11 <selected_items> 12 <item_group> 13 <item_url>http://china.gm.com</item_url> 14 <item_name>gm中文站</item_name> 15 <item_desc>gm中文站desc</item_desc> 16 <item_desc2>gm中文站desc2</item_desc2> 17 <item_desc3>gm中文站desc3</item_desc3> 18 <item_desc4>gm中文站desc4</item_desc4> 19 </item_group> 20 <items_source>products</items_source> 21 <item_group> 22 <item_url>http://www.gm.com</item_url> 23 <item_name>gm</item_name> 24 <item_desc>gmdesc</item_desc> 25 </item_group> 26 </selected_items> 27 <attachments> 28 <attachment-group> 29 <attachment_url> 30 http://china.gm.com/pics/com.cn.gm/story/frsc.jpg 31 </attachment_url> 32 <attachment_name>黄晓豫</attachment_name> 33 <attachment_desc> 34 <desc1>attach-desc1</desc1> 35 <desc2>attach-desc2</desc2> 36 <desc3>attach-desc3</desc3> 37 <desc4>attach-desc4</desc4> 38 </attachment_desc> 39 </attachment-group> 40 <attachment-group> 41 <attachment_url> 42 http://china.gm.com/pics/com.cn.gm/story/wr.jpg 43 </attachment_url> 44 <attachment_name>张中汉</attachment_name> 45 <attachment_desc> 46 <desc1>attach-desc1</desc1> 47 <desc2>attach-desc2</desc2> 48 </attachment_desc> 49 <attachment_desc> 50 <desc1>attach-desc1</desc1> 51 <desc2>attach-desc2</desc2> 52 </attachment_desc> 53 </attachment-group> 54 </attachments> 55 <desc_group> 56 <desc_item>desc_item_1</desc_item> 57 <desc_item>desc_item_2</desc_item> 58 <desc_item>desc_item_3</desc_item> 59 <desc_item>desc_item_4</desc_item> 60 <desc_item>desc_item_5</desc_item> 61 </desc_group> 62 </GmMail>
转换后的的Map(转换成字符串的效果):
{message=XML-未来世界 Message, selected_items={items_source=products, item_group=[{item_name=gm中文站, item_desc=gm中文站desc, item_desc2=gm中文站desc2, item_desc4=gm中文站desc4, item_url=http://china.gm.com, item_desc3=gm中文站desc3}, {item_name=gm, item_desc=gmdesc, item_url=http://www.gm.com}]}, to_alias=tom, desc_group={desc_item=[desc_item_1, desc_item_2, desc_item_3, desc_item_4, desc_item_5]}, sender_comp_name=xml-gm, subject=xml-hello guys, to_address=test@corp.gm.com, template_id=2, attachments={attachment-group=[{attachment_url=http://china.gm.com/pics/com.cn.gm/story/frsc.jpg, attachment_name=黄晓豫, attachment_desc={desc3=attach-desc3, desc4=attach-desc4, desc1=attach-desc1, desc2=attach-desc2}}, {attachment_url=http://china.gm.com/pics/com.cn.gm/story/wr.jpg, attachment_name=张中汉, attachment_desc=[{desc1=attach-desc1, desc2=attach-desc2}, {desc1=attach-desc1, desc2=attach-desc2}]}]}, recipient_name=xml-tom, send_address=xml-test@163.com}
xml处理用的dom4j
下面是实现转换的主要类XmlUtils:
1 package xml.dom4j; 2 3 import java.util.ArrayList; 4 import java.util.HashMap; 5 import java.util.Iterator; 6 import java.util.List; 7 import java.util.Map; 8 9 import org.dom4j.Document; 10 import org.dom4j.Element; 11 12 public class XmlUtils { 13 14 public static Map<String, Object> Dom2Map(Document doc){ 15 Map<String, Object> map = new HashMap<String, Object>(); 16 if(doc == null) 17 return map; 18 Element root = doc.getRootElement(); 19 for (Iterator iterator = root.elementIterator(); iterator.hasNext();) { 20 Element e = (Element) iterator.next(); 21 //System.out.println(e.getName()); 22 List list = e.elements(); 23 if(list.size() > 0){ 24 map.put(e.getName(), Dom2Map(e)); 25 }else 26 map.put(e.getName(), e.getText()); 27 } 28 return map; 29 } 30 31 32 public static Map Dom2Map(Element e){ 33 Map map = new HashMap(); 34 List list = e.elements(); 35 if(list.size() > 0){ 36 for (int i = 0;i < list.size(); i++) { 37 Element iter = (Element) list.get(i); 38 List mapList = new ArrayList(); 39 40 if(iter.elements().size() > 0){ 41 Map m = Dom2Map(iter); 42 if(map.get(iter.getName()) != null){ 43 Object obj = map.get(iter.getName()); 44 if(!obj.getClass().getName().equals("java.util.ArrayList")){ 45 mapList = new ArrayList(); 46 mapList.add(obj); 47 mapList.add(m); 48 } 49 if(obj.getClass().getName().equals("java.util.ArrayList")){ 50 mapList = (List) obj; 51 mapList.add(m); 52 } 53 map.put(iter.getName(), mapList); 54 }else 55 map.put(iter.getName(), m); 56 } 57 else{ 58 if(map.get(iter.getName()) != null){ 59 Object obj = map.get(iter.getName()); 60 if(!obj.getClass().getName().equals("java.util.ArrayList")){ 61 mapList = new ArrayList(); 62 mapList.add(obj); 63 mapList.add(iter.getText()); 64 } 65 if(obj.getClass().getName().equals("java.util.ArrayList")){ 66 mapList = (List) obj; 67 mapList.add(iter.getText()); 68 } 69 map.put(iter.getName(), mapList); 70 }else 71 map.put(iter.getName(), iter.getText()); 72 } 73 } 74 }else 75 map.put(e.getName(), e.getText()); 76 return map; 77 } 78 79 }
下面是一个创建xml的类(不重要,可以忽略,只是用来生成一个xml以便测试,可以自己写)
1 package xml.dom4j; 2 3 import org.dom4j.Document; 4 import org.dom4j.DocumentHelper; 5 import org.dom4j.Element; 6 7 public class CreateXml { 8 9 /** 10 * @param args 11 */ 12 public static void main(String[] args) { 13 // TODO Auto-generated method stub 14 15 } 16 17 public Document createXml(){ 18 Document doc = DocumentHelper.createDocument(); 19 Element e = doc.addElement("GmMail"); 20 e.addElement("template_id").setText("2"); 21 e.addElement("to_address").setText("test@corp.gm.com"); 22 e.addElement("to_alias").setText("tom"); 23 e.addElement("message").setText("XML-未来世界 Message"); 24 e.addElement("recipient_name").setText("xml-tom"); 25 e.addElement("send_address").setText("xml-test@163.com"); 26 e.addElement("sender_comp_name").setText("xml-gm"); 27 e.addElement("subject").setText("xml-hello guys"); 28 Element Selecteditems = e.addElement("selected_items"); 29 30 Element itemsGroup = Selecteditems.addElement("item_group"); 31 //Element item = itemsGroup.addElement("item"); 32 itemsGroup.addElement("item_url").setText("http://china.gm.com"); 33 itemsGroup.addElement("item_name").setText("gm中文站"); 34 itemsGroup.addElement("item_desc").setText("gm中文站desc"); 35 itemsGroup.addElement("item_desc2").setText("gm中文站desc2"); 36 itemsGroup.addElement("item_desc3").setText("gm中文站desc3"); 37 itemsGroup.addElement("item_desc4").setText("gm中文站desc4"); 38 Selecteditems.addElement("items_source").setText("products"); 39 itemsGroup = Selecteditems.addElement("item_group"); 40 itemsGroup.addElement("item_url").setText("http://www.gm.com"); 41 itemsGroup.addElement("item_name").setText("gm"); 42 itemsGroup.addElement("item_desc").setText("gmdesc"); 43 Element attachment = e.addElement("attachments"); 44 Element attachmentGroup = attachment.addElement("attachment-group"); 45 attachmentGroup.addElement("attachment_url").setText("http://china.gm.com/pics/com.cn.gm/story/frsc.jpg"); 46 attachmentGroup.addElement("attachment_name").setText("黄晓豫"); 47 Element attachmentDesc = attachmentGroup.addElement("attachment_desc"); 48 attachmentDesc.addElement("desc1").setText("attach-desc1"); 49 attachmentDesc.addElement("desc2").setText("attach-desc2"); 50 attachmentDesc.addElement("desc3").setText("attach-desc3"); 51 attachmentDesc.addElement("desc4").setText("attach-desc4"); 52 attachmentGroup = attachment.addElement("attachment-group"); 53 attachmentGroup.addElement("attachment_url").setText("http://china.gm.com/pics/com.cn.gm/story/wr.jpg"); 54 attachmentGroup.addElement("attachment_name").setText("张中汉"); 55 attachmentDesc = attachmentGroup.addElement("attachment_desc"); 56 attachmentDesc.addElement("desc1").setText("attach-desc1"); 57 attachmentDesc.addElement("desc2").setText("attach-desc2"); 58 attachmentDesc = attachmentGroup.addElement("attachment_desc"); 59 attachmentDesc.addElement("desc1").setText("attach-desc1"); 60 attachmentDesc.addElement("desc2").setText("attach-desc2"); 61 Element descGroup = e.addElement("desc_group"); 62 descGroup.addElement("desc_item").setText("desc_item_1"); 63 descGroup.addElement("desc_item").setText("desc_item_2"); 64 descGroup.addElement("desc_item").setText("desc_item_3"); 65 descGroup.addElement("desc_item").setText("desc_item_4"); 66 descGroup.addElement("desc_item").setText("desc_item_5"); 67 return doc; 68 } 69 }
下面是main调用类:
1 package xml.dom4j; 2 3 import java.util.Map; 4 5 import org.dom4j.Document; 6 7 public class Demo { 8 9 public static void main(String[] args){ 10 CreateXml create = new CreateXml(); 11 Document doc = create.createXml(); 12 String strXml = doc.asXML(); 13 System.out.println(strXml); 14 15 Map map = XmlUtils.Dom2Map(doc); 16 17 System.out.println(map.toString()); 18 } 19 20 }
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原文地址：http://www.cnblogs.com/a757956132/p/5566464.html
