克隆xml节点

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import java.util.Map.Entry;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.io.OutputFormat;

import org.dom4j.io.SAXReader;

import org.dom4j.io.XMLWriter;

public class TestXml {

public static Map<String, String> traverseFolder2(String path, Map<String, String> m) {

File file = new File(path);

if (file.exists()) {

File[] files = file.listFiles();

if (files.length == 0) {

return null;

} else {

for (File file2 : files) {

if (file2.isDirectory()) {

traverseFolder2(file2.getAbsolutePath(), m);

} else if (file2.getAbsolutePath().indexOf(".xml") != -1) {

m.put(file2.getAbsolutePath().substring(

file2.getAbsolutePath().lastIndexOf("\\") + 1),

file2.getAbsolutePath());

}

}

}

} else {

System.out.println("文件不存在!");

}

return m;

}

public static void main(String[] args) {

String path = "E:\\mapper\\src\\main\\java\\com\\online\\weigao\\platform";

Map<String, String> map1 = traverseFolder2(path, new HashMap<String, String>());

path = "E:\\project\\weigao\\weigao\\src\\main\\java\\com\\online\\weigao\\platform";

Map<String, String> map2 = traverseFolder2(path, new HashMap<String, String>());

for (Entry<String, String> e:map1.entrySet()) {

if(null == map2.get(e.getKey())) continue;

SAXReader reader = new SAXReader();

try {

Document document = reader.read(new File(e.getValue()));

Element root = document.getRootElement();

Element deleteAll = null;

Element deleteTj = null;

Element updateEmpty = null;

if(null != root.selectSingleNode("delete[@id=\"delete\"]")){

deleteAll = (Element) root.selectSingleNode("delete[@id=\"delete\"]").clone();

}

if(null != root.selectSingleNode("delete[@id=\"deleteByEntity\"]")){

deleteTj = (Element) root.selectSingleNode("delete[@id=\"deleteByEntity\"]").clone();

}

if(null != root.selectSingleNode("update[@id=\"sysUpdateByPrimaryKey\"]")){

updateEmpty = (Element) root.selectSingleNode("/mapper/update[@id=\"sysUpdateByPrimaryKey\"]").clone();

}

SAXReader reader1 = new SAXReader();

Document document1 = reader1.read(new File(map2.get(e.getKey())));

if(null != document1) {

Element root1 = document1.getRootElement();

if(null == root1.selectSingleNode("delete[@id=\"delete\"]")){

root1.add(deleteAll);

}

if(null == root1.selectSingleNode("delete[@id=\"deleteByEntity\"]")){

root1.add(deleteTj);

}

if(null == root1.selectSingleNode("update[@id=\"sysUpdateByPrimaryKey\"]")){

root1.add(updateEmpty);

}

try {  

            FileOutputStream fos = new FileOutputStream(map2.get(e.getKey()));  

            // 用于格式化输出  

            // OutputFormat of = OutputFormat.createPrettyPrint();  

            // 格式化输出的另一个形式，不知这两种有什么区别  

            // 第1个参数为格式化输出缩排字符,此处为空格,第2个参数true为换行输出,false为单行输出  

            OutputFormat of = new OutputFormat(" ", true);  

            // 输出为GBK码解决在windows下某些系统下打开含有中文xml乱码的情况  

            of.setEncoding("UTF-8");  

            //of.setNewlines(true);

           // of.setIndent(true);

            XMLWriter xw = new XMLWriter(fos, of);  

            xw.write(document1);  

            xw.close();  

        } catch (IOException e1) {  

            e1.printStackTrace();  

        }  

}

} catch (DocumentException e1) {

e1.printStackTrace();

}

}

}

}