xml转list

XML 前端之家
前端之家收集整理的这篇文章主要介绍了xml转list，前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
@H_403_0@ 大家在解析大量相似xml文件的时候是否会遇到这样一个问题：冗余的代码去set定义的实体对象Bean的值，基本都是一样的操作
@H_403_0@
@H_403_0@ 而且毫无任何代码价值可言所以在这写了一个简单的例子，类封装了几个方法你只需传入xml文件，或者URL路径。和Bean.Class 类名
@H_403_0@
@H_403_0@ 即可自动传回你需要的List集合。
@H_403_0@
@H_403_0@ 需要解析的xml文件
@H_403_0@
@H_403_0@ <?xml version="1.0" encoding="UTF-8"?> @H_403_0@ <messages> @H_403_0@ <resultCode>0</resultCode> @H_403_0@ <totalCount>2</totalCount> @H_403_0@ <UserLists> @H_403_0@ <UserList> @H_403_0@ <userId>0</userId> @H_403_0@ <loginName>张三0</loginName> @H_403_0@ <email>qsina0@sina.com</email> @H_403_0@ <userType>1</userType> @H_403_0@ <status>1</status> @H_403_0@ <roleType>1</roleType> @H_403_0@ <registerIP>192.168.1.0</registerIP> @H_403_0@ <registerTime>2012-06-07 15:35:33</registerTime> @H_403_0@ </UserList> @H_403_0@ <UserList> @H_403_0@ <userId>1</userId> @H_403_0@ <loginName>张三1</loginName> @H_403_0@ <email>qsina1@sina.com</email> @H_403_0@ <userType>1</userType> @H_403_0@ <status>1</status> @H_403_0@ <roleType>1</roleType> @H_403_0@ <registerIP>192.168.1.1</registerIP> @H_403_0@ <registerTime>2012-06-07 15:35:33</registerTime> @H_403_0@ </UserList> @H_403_0@ </UserLists> @H_403_0@ </messages> @H_403_0@
@H_403_0@ 在进行相关操作中需要如下包： @H_403_0@
@H_403_0@ 下面是贴出的代码： @H_403_0@
@H_403_0@ package com.jeecms.common.util; @H_403_0@
@H_403_0@ import java.lang.reflect.Field; @H_403_0@ import java.net.URL; @H_403_0@ import java.text.SimpleDateFormat; @H_403_0@ import java.util.ArrayList; @H_403_0@ import java.util.HashMap; @H_403_0@ import java.util.List; @H_403_0@ import java.util.Map; @H_403_0@
@H_403_0@ import org.dom4j.Document; @H_403_0@ import org.dom4j.DocumentHelper; @H_403_0@ import org.dom4j.Element; @H_403_0@ import org.dom4j.io.SAXReader; @H_403_0@
@H_403_0@ public class XmlParseUtil { @H_403_0@ /** @H_403_0@ * 反射设置实体不同类型字段的值 <暂时只支持 日期 字符串 boolean Integer值设置 待扩建> @H_403_0@ * @H_403_0@ * @param field @H_403_0@ * @param obj @H_403_0@ * @param value @H_403_0@ * @throws Exception @H_403_0@ */ @H_403_0@ public static void convertValue(Field field,Object obj,String value) @H_403_0@ throws Exception { @H_403_0@ SimpleDateFormat sim = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); @H_403_0@ if (field.getGenericType().toString().equals("class java.lang.Integer")) { @H_403_0@ field.set(obj,Integer.parseInt(value)); @H_403_0@ } else if (field.getGenericType().toString().equals("boolean")) { @H_403_0@ field.set(obj,Boolean.parseBoolean(value)); @H_403_0@ } else if (field.getGenericType().toString().equals( @H_403_0@ "class java.util.Date")) { @H_403_0@ field.set(obj,sim.parse(value)); @H_403_0@ } else { @H_403_0@ field.set(obj,value); @H_403_0@ } @H_403_0@
@H_403_0@ } @H_403_0@
@H_403_0@ /** @H_403_0@ * 解析xml文件返回保存cls的List集合，如果返回码resultCode=1时则返回List为null @H_403_0@ * @H_403_0@ * @param xml @H_403_0@ * @param cls @H_403_0@ * @return @H_403_0@ * @throws Exception @H_403_0@ */ @H_403_0@ @SuppressWarnings("unchecked") @H_403_0@ public static List<?> parseXml2List(String xml,Class<?> cls) @H_403_0@ throws Exception { @H_403_0@ List<Object> lists = null; @H_403_0@ Document doc = DocumentHelper.parseText(xml); @H_403_0@ Element et = doc.getRootElement(); @H_403_0@ String root = et.getName(); @H_403_0@ // 查看返回码是否为真. @H_403_0@ List<Element> list = doc.selectNodes("//" + root + "/resultCode"); @H_403_0@ if (!list.isEmpty() && list.size() > 0) { @H_403_0@ Element element = list.get(0); @H_403_0@ String returnResult = element.getText(); @H_403_0@ if (returnResult.equals("0")) { @H_403_0@ List<Element> father = doc.selectNodes("//" + root + "/"+ cls.getSimpleName()+"s"); @H_403_0@ //判断对象父节点是否有包含数据 @H_403_0@ if(father!=null&&!father.isEmpty()&&father.size()==1){ @H_403_0@ List<Element> userLists = father.get(0).elements(); @H_403_0@ if (userLists!=null&&!list.isEmpty()) { @H_403_0@ lists = new ArrayList<Object>(); @H_403_0@ for (Element e : userLists) { @H_403_0@ List<Element> li = e.elements(); @H_403_0@ Class<?> cl = (Class<?>) Class.forName(cls.getName()); @H_403_0@ Object ob = cl.newInstance(); @H_403_0@ for (Element element2 : li) { @H_403_0@ String name = element2.getName(); @H_403_0@ String value = element2.getText(); @H_403_0@ Field field = ob.getClass().getDeclaredField(name); @H_403_0@ field.setAccessible(true); @H_403_0@ convertValue(field,ob,value); @H_403_0@ } @H_403_0@ lists.add(ob); @H_403_0@ } @H_403_0@ } @H_403_0@ } @H_403_0@ } @H_403_0@
@H_403_0@ } @H_403_0@ return lists; @H_403_0@ } @H_403_0@
@H_403_0@ /** @H_403_0@ * 解析xml文件返回保存cls的List集合，如果返回码resultCode=1时则返回List为null @H_403_0@ * @H_403_0@ * @param url @H_403_0@ * @param cls @H_403_0@ * @return @H_403_0@ * @throws Exception @H_403_0@ */ @H_403_0@ @SuppressWarnings("unchecked") @H_403_0@ public static List<?> parseXml2List(URL url,Class<?> cls) @H_403_0@ throws Exception { @H_403_0@ List<Object> lists = null; @H_403_0@ SAXReader saxReader = new SAXReader(); @H_403_0@ Document doc = saxReader.read(url); @H_403_0@ Element et = doc.getRootElement(); @H_403_0@ String root = et.getName(); @H_403_0@ // 查看返回码是否为真. @H_403_0@ List<Element> list = doc.selectNodes("//" + root + "/resultCode"); @H_403_0@ if (!list.isEmpty() && list.size() > 0) { @H_403_0@ Element element = list.get(0); @H_403_0@ String returnResult = element.getText(); @H_403_0@ if (returnResult.equals("0")) { @H_403_0@ List<Element> father = doc.selectNodes("//" + root + "/"+ cls.getSimpleName()+"s"); @H_403_0@ //判断对象父节点是否有包含数据 @H_403_0@ if(father!=null&&!father.isEmpty()&&father.size()==1){ @H_403_0@ List<Element> userLists = father.get(0).elements(); @H_403_0@ if (userLists!=null&&!list.isEmpty()) { @H_403_0@ lists = new ArrayList<Object>(); @H_403_0@ for (Element e : userLists) { @H_403_0@ List<Element> li = e.elements(); @H_403_0@ Class<?> cl = (Class<?>) Class.forName(cls.getName()); @H_403_0@ Object ob = cl.newInstance(); @H_403_0@ for (Element element2 : li) { @H_403_0@ String name = element2.getName(); @H_403_0@ String value = element2.getText(); @H_403_0@ Field field = ob.getClass().getDeclaredField(name); @H_403_0@ field.setAccessible(true); @H_403_0@ convertValue(field,value); @H_403_0@ } @H_403_0@ lists.add(ob); @H_403_0@ } @H_403_0@ } @H_403_0@ } @H_403_0@ } @H_403_0@
@H_403_0@ } @H_403_0@ return lists; @H_403_0@ } @H_403_0@ @H_403_0@ /** @H_403_0@ * 解析xml文件返回保存Map的集合，map中可能包含key值为returnCode、desc、totalCount等单字段. @H_403_0@ * 也可能包含存储对象为List<cls>的集合值. @H_403_0@ * 获取List值key cls_List @H_403_0@ * @param requestPath @H_403_0@ * @param cls @H_403_0@ * @return map @H_403_0@ * @throws Exception @H_403_0@ */ @H_403_0@ @SuppressWarnings("unchecked") @H_403_0@ public static Map<String,Object> parseXml2Map(String requestPath, @H_403_0@ Class<?> cls) throws Exception { @H_403_0@ Map<String,Object> maps = new HashMap<String,Object>(); @H_403_0@ List<Object> lists = new ArrayList<Object>(); @H_403_0@ SAXReader saxReader = new SAXReader(); @H_403_0@ //Document doc = saxReader.read(new File(requestPath)); @H_403_0@ Document doc = saxReader.read(new URL(requestPath)); @H_403_0@ Element et = doc.getRootElement(); @H_403_0@ // 标记List是否为空 @H_403_0@ // boolean bool = true ; @H_403_0@ // 根节点名字 @H_403_0@ List<Element> rList = et.elements(); @H_403_0@ for (Element element : rList) { @H_403_0@ List<Element> rLists = element.elements(); @H_403_0@ if (!rLists.isEmpty() && rLists.size() > 0) { @H_403_0@ //bool = false; @H_403_0@ // 判断二级节点 @H_403_0@ for (Element e : rLists) { @H_403_0@ List<Element> li = e.elements(); @H_403_0@ Class<?> cl = (Class<?>) Class.forName(cls.getName()); @H_403_0@ Object ob = cl.newInstance(); @H_403_0@ for (Element element2 : li) { @H_403_0@ String name = element2.getName(); @H_403_0@ String value = element2.getText(); @H_403_0@ Field field = ob.getClass().getDeclaredField(name); @H_403_0@ field.setAccessible(true); @H_403_0@ convertValue(field,value); @H_403_0@ } @H_403_0@ lists.add(ob); @H_403_0@ } @H_403_0@ } else { @H_403_0@ maps.put(element.getName(),element.getText()); @H_403_0@ } @H_403_0@ maps.put(cls.getSimpleName() + "_List",lists); @H_403_0@ } @H_403_0@ return maps; @H_403_0@ } @H_403_0@
@H_403_0@ /** @H_403_0@ * 只获取返回码0为保存成功(true)1为保存失败(false) @H_403_0@ */ @H_403_0@ @SuppressWarnings("unchecked") @H_403_0@ public static boolean parseXmlReturnCode(String xml) { @H_403_0@ boolean bool = false; @H_403_0@ try { @H_403_0@ Document doc = DocumentHelper.parseText(xml); @H_403_0@ Element et = doc.getRootElement(); @H_403_0@ String root = et.getName(); @H_403_0@ // 查看返回码是否为真. @H_403_0@ List<Element> list = doc.selectNodes("//" + root + "/resultCode"); @H_403_0@ if (!list.isEmpty() && list.size() > 0) { @H_403_0@ Element element = list.get(0); @H_403_0@ String returnResult = element.getText(); @H_403_0@ if (returnResult.equals("0")) { @H_403_0@ bool = true; @H_403_0@ } @H_403_0@ } @H_403_0@ } catch (Exception e) { @H_403_0@ e.printStackTrace(); @H_403_0@ } @H_403_0@ return bool; @H_403_0@ } @H_403_0@ } @H_403_0@ //////////////////// 很多朋友遇到xml，map和json互转的问题，在开发中xml和json越来越重要了。我就把我的工具类贴上来。


@H_403_0@ @H_403_0@ @H_403_0@ [java] view plain copy print ?
  1. package com.shine.framework.core.util;
  3. import java.io.ByteArrayOutputStream;
  4. import java.util.ArrayList;
  5. import java.util.HashMap;
  6. import java.util.Iterator;
  7. import java.util.List;
  8. import java.util.Map;
  10. import net.sf.json.JSON;
  11. import net.sf.json.JSONSerializer;
  12. import net.sf.json.xml.XMLSerializer;
  14. import org.dom4j.Document;
  15. import org.dom4j.DocumentHelper;
  16. import org.dom4j.Element;
  17. import org.dom4j.io.OutputFormat;
  18. import org.dom4j.io.XMLWriter;
  20. /**
  21. * common xml conver utility
  22. *
  23. * @author viruscodecn@gmail.com
  24. * @version Framework 2010.10.26
  25. * @url http://blog.csdn.net/arjick/article/details/6251777
  26. */
  27. public class XmlConverUtil {
  28. /**
  29. * map to xml xml <node><key label="key1">value1</key><key
  30. * label="key2">value2</key>......</node>
  31. *
  32. * @param map
  33. * @return
  34. */
  35. public static String maptoXml(Map map) {
  36. Document document = DocumentHelper.createDocument();
  37. Element nodeElement = document.addElement("node");
  38. for (Object obj : map.keySet()) {
  39. Element keyElement = nodeElement.addElement("key");
  40. keyElement.addAttribute("label",String.valueOf(obj));
  41. keyElement.setText(String.valueOf(map.get(obj)));
  42. }
  43. return doc2String(document);
  44. }
  46. /**
  47. * list to xml xml <nodes><node><key label="key1">value1</key><key
  48. * label="key2">value2</key>......</node><node><key
  49. * label="key1">value1</key><key
  50. * label="key2">value2</key>......</node></nodes>
  51. *
  52. * @param list
  53. * @return
  54. */
  55. public static String listtoXml(List list) throws Exception {
  56. Document document = DocumentHelper.createDocument();
  57. Element nodesElement = document.addElement("nodes");
  58. int i = 0;
  59. for (Object o : list) {
  60. Element nodeElement = nodesElement.addElement("node");
  61. if (o instanceof Map) {
  62. for (Object obj : ((Map) o).keySet()) {
  63. Element keyElement = nodeElement.addElement("key");
  64. keyElement.addAttribute("label",String.valueOf(obj));
  65. keyElement.setText(String.valueOf(((Map) o).get(obj)));
  66. }
  67. } else {
  68. Element keyElement = nodeElement.addElement("key");
  69. keyElement.addAttribute("label",String.valueOf(i));
  70. keyElement.setText(String.valueOf(o));
  71. }
  72. i++;
  73. }
  74. return doc2String(document);
  75. }
  77. /**
  78. * json to xml {"node":{"key":{"@label":"key1","#text":"value1"}}} conver
  79. * <o><node class="object"><key class="object"
  80. * label="key1">value1</key></node></o>
  81. *
  82. * @param json
  83. * @return
  84. */
  85. public static String jsontoXml(String json) {
  86. try {
  87. XMLSerializer serializer = new XMLSerializer();
  88. JSON jsonObject = JSONSerializer.toJSON(json);
  89. return serializer.write(jsonObject);
  90. } catch (Exception e) {
  91. e.printStackTrace();
  92. }
  93. return null;
  94. }
  96. /**
  97. * xml to map xml <node><key label="key1">value1</key><key
  98. * label="key2">value2</key>......</node>
  99. *
  100. * @param xml
  101. * @return
  102. */
  103. public static Map xmltoMap(String xml) {
  104. try {
  105. Map map = new HashMap();
  106. Document document = DocumentHelper.parseText(xml);
  107. Element nodeElement = document.getRootElement();
  108. List node = nodeElement.elements();
  109. for (Iterator it = node.iterator(); it.hasNext();) {
  110. Element elm = (Element) it.next();
  111. map.put(elm.attributeValue("label"),elm.getText());
  112. elm = null;
  113. }
  114. node = null;
  115. nodeElement = null;
  116. document = null;
  117. return map;
  118. } catch (Exception e) {
  119. e.printStackTrace();
  120. }
  121. return null;
  122. }
  124. /**
  125. * xml to list xml <nodes><node><key label="key1">value1</key><key
  126. * label="key2">value2</key>......</node><node><key
  127. * label="key1">value1</key><key
  128. * label="key2">value2</key>......</node></nodes>
  129. *
  130. * @param xml
  131. * @return
  132. */
  133. public static List xmltoList(String xml) {
  134. try {
  135. List<Map> list = new ArrayList<Map>();
  136. Document document = DocumentHelper.parseText(xml);
  137. Element nodesElement = document.getRootElement();
  138. List nodes = nodesElement.elements();
  139. for (Iterator its = nodes.iterator(); its.hasNext();) {
  140. Element nodeElement = (Element) its.next();
  141. Map map = xmltoMap(nodeElement.asXML());
  142. list.add(map);
  143. map = null;
  144. }
  145. nodes = null;
  146. nodesElement = null;
  147. document = null;
  148. return list;
  149. } catch (Exception e) {
  150. e.printStackTrace();
  151. }
  152. return null;
  153. }
  155. /**
  156. * xml to json <node><key label="key1">value1</key></node> 转化为
  157. * {"key":{"@label":"key1","#text":"value1"}}
  158. *
  159. * @param xml
  160. * @return
  161. */
  162. public static String xmltoJson(String xml) {
  163. XMLSerializer xmlSerializer = new XMLSerializer();
  164. return xmlSerializer.read(xml).toString();
  165. }
  167. /**
  168. *
  169. * @param document
  170. * @return
  171. */
  172. public static String doc2String(Document document) {
  173. String s = "";
  174. try {
  175. // 使用输出流来进行转化
  176. ByteArrayOutputStream out = new ByteArrayOutputStream();
  177. // 使用UTF-8编码
  178. OutputFormat format = new OutputFormat(" ",true,"UTF-8");
  179. XMLWriter writer = new XMLWriter(out,format);
  180. writer.write(document);
  181. s = out.toString("UTF-8");
  182. } catch (Exception ex) {
  183. ex.printStackTrace();
  184. }
  185. return s;
  186. }
  187. }
@H_403_0@ //////////////

将xml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

示例：

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.Element;
public class XmlUtils {
@SuppressWarnings("unchecked")
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();
List list = e.elements();
if(list.size() > 0){
map.put(e.getName(),Dom2Map(e));
}else
map.put(e.getName(),e.getText());
}
return map;
}
@SuppressWarnings("unchecked")
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(),iter.getText());
}
}
}else
map.put(e.getName(),e.getText());
return map;
}
}
测试类：

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Map;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;

public class XmlToMapDemo {
public static void main(String[] args) throws IOException,
DocumentException {

FileInputStream fis = new FileInputStream("d://a.xml");
byte[] b = new byte[fis.available()];
fis.read(b);
String str = new String(b);

Document doc = DocumentHelper.parseText(str);

System.out.println(doc.asXML());

long beginTime = System.currentTimeMillis();

Map<String,Object> map = XmlUtils.Dom2Map(doc);

System.out.println(map.toString());

System.out.println("Use time:"+(System.currentTimeMillis()-beginTime));

} }

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