XML读写工具

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.util.List;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.stream.StreamSource;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.dom4j.Attribute;

import org.dom4j.Document;

import org.dom4j.DocumentHelper;

import org.dom4j.Element;

import org.dom4j.io.DocumentResult;

import org.dom4j.io.DocumentSource;

import org.dom4j.io.OutputFormat;

import org.dom4j.io.SAXReader;

import org.dom4j.io.XMLWriter;

/**

 * XML读写工具

 * @author csx

 *

 */

public class XmlUtil {

        

         private static final Log logger=LogFactory.getLog(XmlUtil.class);

         public static final String CONFIG_FILE_NAME = "hurong.xml";// 系统配置文件名称

        

        

         public static Document getSystemConfigXML(){

                  

                   try{

                      Document document = null;

                      File configFile = null;

                      String configFilePath = Thread.currentThread().getContextClassLoader().getResource("").toURI().getPath()+"hurong.xml";

                      configFile = new File(configFilePath);

                      SAXReader saxReader = new SAXReader();

                      document = saxReader.read(configFile);

                      return document;}

                   catch (Exception e) {

                            e.printStackTrace();

                            return null;

                   }

         }

         /**

          *

          * 获取第三方短信、身份证验证接口

          *

          *

          * **/

         public  static Document getThridInterface(){

                   try{

                            Document document = null;

                            File configFile = null;

                            String configFilePath = Thread.currentThread().getContextClassLoader().getResource("").toURI().getPath()+"thridInterface.xml";

                            configFile = new File(configFilePath);

                            SAXReader saxReader = new SAXReader();

                            document = saxReader.read(configFile);

                            return document;}

                   catch (Exception e) {

                            e.printStackTrace();

                            return null;

                   }

         }

        

         /**

          * 把Document对象转成XML String

          * @param document

          * @return

          */

         public static String docToString(Document document) {

                   String s = "";

                   try {

                            ByteArrayOutputStream out = new ByteArrayOutputStream();

                            OutputFormat format = new OutputFormat("  ", true, "UTF-8");

                            XMLWriter writer = new XMLWriter(out, format);

                            writer.write(document);

                            s = out.toString("UTF-8");

                   } catch (Exception ex) {

                            logger.error("docToString error:"+ex.getMessage());

                   }

                   return s;

         }

         /**

          * 把XML String转成Document对象

          * @param s

          * @return

          */

         public static Document stringToDocument(String s) {

                   Document doc = null;

                   try {

                            doc = DocumentHelper.parseText(s);

                   } catch (Exception ex) {

                            logger.error("stringToDocument error:"+ex.getMessage());

                   }

                   return doc;

         }

        

         /**

          * 把Document对象转成XML对象

          * @param document

          * @param filename

          * @return

          */

         public static boolean docToXmlFile(Document document, String filename) {

                   boolean flag = true;

                   try {

                            OutputFormat format = OutputFormat.createPrettyPrint();

                            format.setEncoding("UTF-8");

                            XMLWriter writer = new XMLWriter(

                                                new FileOutputStream(new File(filename)), format);

                            writer.write(document);

                            writer.close();

                   } catch (Exception ex) {

                            flag = false;

                            logger.error("docToXmlFile error:"+ex.getMessage());

                   }

                   return flag;

         }

         /**

          * 把String XML转成XML文件

          * @param str

          * @param filename

          * @return

          */

         public static boolean stringToXmlFile(String str, String filename) {

                   boolean flag = true;

                   try {

                            Document doc = DocumentHelper.parseText(str);

                            flag = docToXmlFile(doc, filename);

                   } catch (Exception ex) {

                            flag = false;

                            logger.error("stringToXmlFile error:"+ex.getMessage());

                   }

                   return flag;

         }

         /**

          * 加载一个XML文件转成Document对象

          * @param filename

          * @return

          */

         public static Document load(String filename) {

                   return load(new File(filename));

         }

        

         public static Document load(File file){

                   Document document = null;

                   try {

                            SAXReader saxReader = new SAXReader();

                            saxReader.setEncoding("UTF-8");

                            document = saxReader.read(file);

                   } catch (Exception ex) {

                            logger.error("load XML File error:"+ex.getMessage());

                   }

                   return document;

         }

        

         /**

          * 加载一个XML文件转成Document对象

          * @param filename

          * @return

          */

         public static Document load(String filename,String encode) {

                   Document document = null;

                   try {

                            SAXReader saxReader = new SAXReader();

                            saxReader.setEncoding("encode");

                            document = saxReader.read(new File(filename));

                   } catch (Exception ex) {

                            logger.error("load XML File error:"+ex.getMessage());

                   }

                   return document;

         }

         /**

          * 通过流加载一个XML文档对象

          * @param is

          * @return

          */

         public static Document load(InputStream is){

                   Document document = null;

                   try {

                            SAXReader saxReader = new SAXReader();

                            //System.out.println("code:" + System.getProperty("file.encoding"));

                            saxReader.setEncoding("UTF-8");

                            document = saxReader.read(is);

                   } catch (Exception ex) {

                            logger.error("load XML File error:"+ex.getMessage());

                   }

                   return document;

         }

        

         /**

          * 通过流加载一个XML文档对象

          * @param is

          * @return

          */

         public static Document load(InputStream is,String encode){

                   Document document = null;

                   try {

                            SAXReader saxReader = new SAXReader();

                            saxReader.setEncoding(encode);

                            document = saxReader.read(is);

                   } catch (Exception ex) {

                            logger.error("load XML File error:"+ex.getMessage());

                   }

                   return document;

         }

        

         public static Document styleDocument(

                 Document document,

                 String stylesheet

             ) throws Exception {

                 // load the transformer using JAXP

                 TransformerFactory factory = TransformerFactory.newInstance();

                 Transformer transformer = factory.newTransformer(

                     new StreamSource( stylesheet )

                 );

                 // now lets style the given document

                 DocumentSource source = new DocumentSource( document );

                 DocumentResult result = new DocumentResult();

                 transformer.transform( source, result );

                 // return the transformed document

                 Document transformedDoc = result.getDocument();

                 return transformedDoc;

             }

        

         public static void main(String[]args){

                   String filePath="L:/devtools/workspace/eoffice/web/js/menu.xml";

                   String style="L:/devtools/workspace/eoffice/web/js/menu-public.xsl";

                   Document doc=XmlUtil.load(filePath);

                   try{

                            Document another=styleDocument(doc,style);

                            System.out.println("xml:" + another.asXML());

                            //Set idSet=new HashSet();

                             Document publicDoc=another;

                             Element rootEl=publicDoc.getRootElement();

                             List idNodes=rootEl.selectNodes("/Menus//*");

                             System.out.println("size:" + idNodes.size());

                             for(int i=0;i<idNodes.size();i++){

                                      Element el=(Element)idNodes.get(i);

                                      Attribute attr= el.attribute("id");

                                      if(attr!=null){

                                               System.out.println("attr:" + attr.getValue());

                                                //idSet.add(attr.getValue());

                                      }

                             }     

                   }catch(Exception ex){

                            ex.printStackTrace();

                   }       

         }

}