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| 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 org.apache.crimson.tree.XmlDocument;//写XML文件要用到 Import javax.xml.transform. *; Import javax.xml.transform.dom. *; Import javax.xml.transform.stream. *; |
| Private Boolean is Merging (String mainFileName, String sub Filename) throws Exception { Boolean isOver = false; DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); Document Builder 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,doc_vice = null; //获取两个XML文件的Document。 Try { Doc_main = db.parse (mainFileName); Doc_vice = db.parse (sub Filename); } Catch (DOM Exception dom) { System.err.println (dom.getMessage ()); } Catch (Exception ioe) { System.err.println (ioe); } //获取两个文件的根元素。 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元素 Novelist message Items = root_vice.getChildNodes (); Int item_number = messageItems.getLength (); //如果去掉根节点下的第一个元素，比如<所属管理系统> ，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文档中根节点下的元素。 Element messageItem = (Element) messageItems.item (i); IsOver = 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 = write To (doc_main, mainFileName); Return isOver && isWritten; } |
| Private Boolean dupliate (Document doc_dup, Element father, Element son) throws Exception { Boolean is done = false; String son_name = son.getNodeName (); Element sub ITEM = 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); } } Father.appendChild (sub ITEM); //复制节点的值 Text value son = (Text) son.getFirstChild (); String nodevalue_root = ""; If (value_son! = null && value_son.getLength () > 0) nodevalue_root = (String) value_son.getNodeValue (); Text valuenode_root = null; If ((nodevalue_root! = null)&&(nodevalue_root.length () > 0)) valuenode_root = doc_dup.createTextNode (nodevalue_root); If (valuenode_root! = null && valuenode_root.getLength () > 0) subITEM.appendChild (valuenode_root); //复制子结点 Novelist 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 Is done = 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); Is done = dupliate (doc_dup, subITEM, sub_messageItem); } } Return is done; } |
| Private Boolean write To (Document doc, String fileName) throws Exception { Boolean isOver = false; DOM Source doms = new DOM Source (doc); File f = new File (fileName); Stream Result sr = new Stream Result (f); Try { Transformer Factory tf=TransformerFactory.newInstance (); Transformer t=tf.newTransformer (); Properties properties = t.getOutputProperties (); Properties.setProperty (OutputKeys.ENCODING,"GB2312"); T.setOutputProperties (properties); T.transform (doms, sr); IsOver = true; } Catch (TransformerConfigurationException tce) { Tce.printStackTrace (); } Catch (Transformer Exception te) { Te.printStackTrace (); } Return isOver; } |
| Public static void main (String [] args) throws Exception { Boolean is done = is Merging ("D:/a.xml","D:/b.xml"); If (is Done) System.out.println ("XML files have been merged."); Else System.out.println ("XML files have NOT been merged."); } |
