Android开发中关于2个Xml合并问题的实例详解

方法一：Dom4J处理XML

import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileWriter;import java.io.IOException;import java.io.InputStream;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.Element;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;  * 合并并输出2个xml文档，所需要jar：dom4j-1.6.1.jar，jaxen-1.1.1.jar * 将某个xml文档的某个标签下或该标签上一级下所有内容插入到另一个xml文档的某个标签下 * @date 2011-04-13 * @author RobotJi * @version 1.0 public class UniteXML {  public UniteXML() {}    * 根据is获取doc，这里的is可以是本地流或者网络流  * @param is  * @return   public static Document getDocument(InputStream is){  Document doc=null;   try {    doc=new SAXReader().read(is);   } catch (DocumentException e) {    e.printStackTrace();   }    return doc; } public static InputStream getInputStream(String path){  File f=new File(path);  if(!f.exists()){   return null;  }  InputStream is=null;  try {   is = new FileInputStream(f);  } catch (FileNotFoundException e) {   e.printStackTrace();  }  return is; }    * 获取子Element  * @param doc 要获取的文档  * @param tagName 文档对应的标签  * @return   public Element getSubElement(Document doc,String tagName){  Element el=(Element)doc.selectSingleNode("//"+tagName);  return el; }    * 输出xml文档  * @param doc 要输出的文档  * @param fileName 路径   public void writeXML(Document doc,String fileName){  try {   XMLWriter writer=new XMLWriter(new FileWriter(fileName));   writer.write(doc);   writer.flush();   writer.close();  } catch (IOException e) {   e.printStackTrace();  } }    * 合并doc  * @param path1 主文档  * @param path2 被合并的文档  * @param tagName1 在主文档中要插入的标签  * @param tagName2 被合并文档的标签  * @param isContain 是否包含被合并文档标签的上一级标签下的所有结点  * @return   public Document unitXMl(String path1,String path2,String tagName1,String tagName2,boolean isContain){  Document doc1=getDocument(getInputStream(path1));  Document doc2=getDocument(getInputStream(path2));      Element elSub2=getSubElement(doc2,tagName2);  Element elSub1=getSubElement(doc1,tagName1);    if(isContain){//   doc1.getRootElement().appendContent(elSub2.getParent());//直接插入的根标签下   elSub1.appendContent(elSub2.getParent());//插入到tagName1标签下  }else{//   doc1.getRootElement().appendContent(elSub2);   elSub1.appendContent(elSub2);  }  return doc1; }  public static void main(String[] args) {  UniteXML ux=new UniteXML();//将c标签下所有内容插入到aa标签下，若参数设为true则可将c标签上一级下的所有内容插入到aa标签下  Document doc=ux.unitXMl("F:\\test\\a.xml", "F:\\test\\b.xml", "aa", "c", false);    ux.writeXML(doc, "F:\\test\\a_test.xml"); }}

//测试用的2个xml如下：

a.xml

Dom4J处理XML，合并2个Xml

方法二：

import java.io. *; //Java基础包，包含各种IO操作   import java.util. *; //Java基础包，包含各种标准数据结构操作   import javax.xml.parsers. *; //XML解析器接口   import org.w3c.dom. *; //XML的DOM实现   import javax.xml.transform. *;  import javax.xml.transform.dom. *;  import javax.xml.transform.stream. *;    /**  * XML文件合并工具类   * @author GhostFromHeaven  */  public class XMLMergeUtil {            /**      * XML文件的合并处理      * @param mainFileName 待合并处理的xml文件，合并后将更新此文件      * @param subFilename 被合并的xml文件      * @return 合并成功返回true，否则返回false      * @throws Exception      */      public static boolean isMerging(String mainFileName, String subFilename)              throws Exception {          DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();          DocumentBuilder db = null;          try {              db = dbf.newDocumentBuilder();          } catch (ParserConfigurationException pce) {              System.err.println(pce); // 出现异常时，输出异常信息          }          Document doc_main = null;          Document doc_vice = null;          // 获取两个XML文件的Document          try {              doc_main = db.parse(mainFileName);              doc_vice = db.parse(subFilename);          } catch (DOMException dom) {              System.err.println(dom.getMessage());          } catch (Exception ioe) {              System.err.println(ioe);          }          // 获取两个文件的根节点                    Element root_main = doc_main.getDocumentElement();          Element root_vice = doc_vice.getDocumentElement();          // 下面添加被合并文件根节点下的每个节点          NodeList messageItems = root_vice.getChildNodes();          int item_number = messageItems.getLength();          // 如果去掉根节点下的第一个节点，那么i从3开始，否则i从1开始          for (int i = 1; i < item_number; i = i + 2) {              // 调用dupliate()，依次复制被合并XML文档中根节点下的节点              Element messageItem = (Element) messageItems.item(i);              dupliate(doc_main, root_main, messageItem);          }          // 调用 write To()，将合并得到的Document写入目标XML文档          boolean isWritten = writeTo(doc_main, mainFileName);          return isWritten;      }            /**      *      * @param doc_dup      * @param father      * @param son      * @return      * @throws Exception      */      private static boolean dupliate(Document doc_dup, Element father, Element son)              throws Exception {          boolean isdone = false;          Element parentElement = null;                    DuplicateChildElementObject childElementObject = isChildElement(father, son);          if(!childElementObject.isNeedDuplicate()){              //节点相同不用合并              isdone = true;              parentElement = childElementObject.getElement();          }else if(childElementObject.getElement() != null){              parentElement = childElementObject.getElement();          }else{              parentElement = father;          }                    String son_name = son.getNodeName();          Element subITEM = null;          if(!isdone){              subITEM = doc_dup.createElement(son_name);              // 复制节点的属性              if (son.hasAttributes()) {                  NamedNodeMap attributes = son.getAttributes();                  for (int i = 0; i < attributes.getLength(); i++) {                      String attribute_name = attributes.item(i).getNodeName();                      String attribute_value = attributes.item(i).getNodeValue();                      subITEM.setAttribute(attribute_name, attribute_value);                  }              }              parentElement.appendChild(subITEM);          }          else{              subITEM = parentElement;          }                    // 复制子结点          NodeList sub_messageItems = son.getChildNodes();          int sub_item_number = sub_messageItems.getLength();          if (sub_item_number < 2) {              // 如果没有子节点,则返回              isdone = true;          } else {              for (int j = 1; j < sub_item_number; j = j + 2) {                  // 如果有子节点,则递归调用本方法                  Element sub_messageItem = (Element) sub_messageItems.item(j);                  isdone = dupliate(doc_dup, subITEM, sub_messageItem);              }          }                              return isdone;      }        private static boolean writeTo(Document doc, String fileName) throws Exception {          boolean isOver = false;          DOMSource doms = new DOMSource(doc);          File f = new File(fileName);          StreamResult sr = new StreamResult(f);          try {              TransformerFactory tf = TransformerFactory.newInstance();              Transformer t = tf.newTransformer();              Properties properties = t.getOutputProperties();              properties.setProperty(OutputKeys.ENCODING, "UTF-8");              t.setOutputProperties(properties);              t.transform(doms, sr);              isOver = true;          } catch (TransformerConfigurationException tce) {              tce.printStackTrace();          } catch (TransformerException te) {              te.printStackTrace();          }          return isOver;      }            private static DuplicateChildElementObject isChildElement(Element father, Element son){                    DuplicateChildElementObject  childElementObject = new DuplicateChildElementObject();                    NodeList messageItems = father.getChildNodes();          int item_number = messageItems.getLength();          //首先遍历所有节点，查找是否有完全相同的节点，防止同一节点已定义多次          for (int i = 1; i < item_number; i = i + 2) {              Element messageItem = (Element) messageItems.item(i);              if(!messageItem.getNodeName().equals(son.getNodeName())){                  continue;              }              if(messageItem.isEqualNode(son)){//同时判断子节点是否一致                  childElementObject.setNeedDuplicate(false);                  childElementObject.setElement(messageItem);                  return childElementObject;              }          }          for (int i = 1; i < item_number; i = i + 2) {              Element messageItem = (Element) messageItems.item(i);              //判断节点是否处于同一级别              if(!messageItem.getNodeName().equals(son.getNodeName())){                  continue;              }              if(isEqualNode(messageItem,son)){//仅判断当前节点是否一致                  if(hasEqualAttributes(messageItem,son)){//当前节点完全相同不需要合并                      childElementObject.setNeedDuplicate(false);                      childElementObject.setElement(messageItem);                      return childElementObject;                  }else{//当前节点的属性不相同，需要合并                      childElementObject.setNeedDuplicate(true);                      childElementObject.setElement(father);                      return childElementObject;                  }              }              }          //目标文档该节点不存在，需要合并到目标文档中          childElementObject.setNeedDuplicate(true);          childElementObject.setElement(father);          return childElementObject;      }            /**      * 判断两个节点是否相同，未判断节点的属性      * @param arg0      * @param arg      * @return      */      private static boolean isEqualNode(Node arg0,Node arg) {          if (arg == arg0) {              return true;          }          if (arg.getNodeType() != arg0.getNodeType()) {              return false;          }            if (arg0.getNodeName() == null) {              if (arg.getNodeName() != null) {                  return false;              }          } else if (!arg0.getNodeName().equals(arg.getNodeName())) {              return false;          }            if (arg0.getLocalName() == null) {              if (arg.getLocalName() != null) {                  return false;              }          } else if (!arg0.getLocalName().equals(arg.getLocalName())) {              return false;          }            if (arg0.getNamespaceURI() == null) {              if (arg.getNamespaceURI() != null) {                  return false;              }          } else if (!arg0.getNamespaceURI().equals(arg.getNamespaceURI())) {              return false;          }            if (arg0.getPrefix() == null) {              if (arg.getPrefix() != null) {                  return false;              }          } else if (!arg0.getPrefix().equals(arg.getPrefix())) {              return false;          }            if (arg0.getNodeValue() == null) {              if (arg.getNodeValue() != null) {                  return false;              }          } else if (!arg0.getNodeValue().equals(arg.getNodeValue())) {              return false;          }          return true;      }            /**      * 判断节点的属性是否相同      * @param arg0      * @param arg      * @return      */      private static boolean hasEqualAttributes(Node arg0,Node arg) {                    NamedNodeMap map1 = arg0.getAttributes();          NamedNodeMap map2 = arg.getAttributes();          int len = map1.getLength();          if (len != map2.getLength()) {              return false;          }                     for (int i = 0; i < len; i++) {               Node n1 = map1.item(i);               if(n1.getNodeName() != null){                    Node n2 = map2.getNamedItem(n1.getNodeName());                    if(n2 == null){                        return false;                    }else if(!n1.getNodeValue().equals(n2.getNodeValue())){                        return false;                    }               }           }           return true;      }      public static void main(String[] args) {          try {                String sourcefile = "d:/a.xml";               String targetfile = "d:/b.xml";                            boolean isdone = XMLMergeUtil.isMerging(sourcefile, targetfile);                            if (isdone)                  System.out.println("XML files have been merged.");              else                  System.out.println("XML files have NOT been merged.");                    } catch (Exception e) {              e.printStackTrace();          }      }  }    /**  * 复制子节点对象  * @author Administrator  *  */  class DuplicateChildElementObject{      private boolean needDuplicate = true;//记录该节点是否需要复制      private Element element = null;//记录该节点的父节点        public DuplicateChildElementObject() {          super();      }        public boolean isNeedDuplicate() {          return needDuplicate;      }        public void setNeedDuplicate(boolean needDuplicate) {          this.needDuplicate = needDuplicate;      }        public Element getElement() {          return element;      }        public void setElement(Element element) {          this.element = element;      }  }

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