XMl各种格式转换功能代码

package com.cdv.test;



import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.StringReader;



import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.transform.OutputKeys;

import javax.xml.transform.Result;

import javax.xml.transform.Source;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;



import org.dom4j.DocumentException;

import org.dom4j.DocumentHelper;

import org.dom4j.io.SAXReader;

import org.dom4j.io.XMLWriter;

import org.jdom2.input.SAXBuilder;

import org.jdom2.output.Format;

import org.jdom2.output.XMLOutputter;

import org.w3c.dom.Document;

import org.xml.sax.InputSource;



public class XmlKit {



    /**

     * dom4j解析xml

     */

    

    public static org.dom4j.Document xmlTodDocDom4j(String path){



        File file = new File(path);

        org.dom4j.Document doc = null;

        try {

             doc = new SAXReader().read(file);

        } catch (DocumentException e) {

            e.printStackTrace();

        }

        return doc;

    }

    

    public static String docToString(org.dom4j.Document document){

        String xmlStr = document.asXML();

        return xmlStr;

    }

    

    public static org.dom4j.Document stringToXmlDom4j(String xmlStr){

                

        org.dom4j.Document doc = null;

        try {

            doc = DocumentHelper.parseText(xmlStr);

        } catch (DocumentException e) {

            e.printStackTrace();

        }

        return doc;

    }

    

     /** 

     * Document 保存为 XML 文件 

     *  

     * @param doc Document对象 

     * @param path 文件路径 

     */  

    public static void doc2XMLDom4j(org.dom4j.Document doc, String path) {  

        try {  

            XMLWriter xmlWriter = new XMLWriter(new FileWriter(path));

            xmlWriter.write(doc);

            xmlWriter.flush();  

            xmlWriter.close();  

        } catch (Exception e) {  

            return;  

        }  

    }  

    

    

    /**

     * jdom解析xml

     */

    

    public static org.jdom2.Document xmlTodDocJdom(String path){



        File file = new File(path);

        org.jdom2.Document doc = null;

        try {

             doc =new SAXBuilder().build(file);

        } catch (Exception e) {

            e.printStackTrace();

        }

        return doc;

    }

    public static String docToString(org.jdom2.Document doc){

        

        String xmlStr = "";

        Format format = Format.getPrettyFormat();      

        format.setEncoding("UTF-8");//配置xml文档的字符为gb2312，解决中文问题      

        XMLOutputter xmlout = new XMLOutputter(format);     

        ByteArrayOutputStream bo = new ByteArrayOutputStream();     

        try {

            xmlout.output(doc,bo);

        } catch (IOException e) {

            e.printStackTrace();

        }      

        xmlStr = bo.toString();

    

    return xmlStr;

    }

    

    public static org.jdom2.Document stringTodDocJdom (String xmlStr){

            org.jdom2.Document doc = null;

            StringReader sr = new StringReader(xmlStr);     

            InputSource is = new InputSource(sr);     

            try {

                doc =(new SAXBuilder()).build(is);

            } catch (Exception e) {

                e.printStackTrace();

            } 

         

        return doc;

    }



     /** 

     * DOCUMENT格式化输出保存为XML 

     *  

     * @param doc JDOM的Document 

     * @param filePath 输出文件路径 

     * @throws Exception 

     */  

    public static void doc2XML(org.jdom2.Document doc, String filePath) throws Exception{  

        Format format = Format.getCompactFormat();   

        format.setEncoding("UTF-8"); //设置XML文件的字符为UTF-8  

        format.setIndent("     ");//设置缩进   

        XMLOutputter outputter = new XMLOutputter(format);//定义输出 ,在元素后换行，每一层元素缩排四格   

        FileWriter writer = new FileWriter(filePath);//输出流  

        outputter.output(doc, writer);  

        writer.close();  

    }  

    

    

    /**

     * jdk api解析xml

     */

    

    public static Document xmlTodDoc(String path){



        File file = new File(path);

        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();  

        DocumentBuilder builder = null;  

        Document doc = null;

        try {

            builder = factory.newDocumentBuilder();

            doc = builder.parse(file);

        } catch (Exception e) {

            e.printStackTrace();

        }

        return doc;

    }

    

    public static String xmlToString(Document doc){

        

            String xmlStr = "";

            TransformerFactory  tf  =  TransformerFactory.newInstance();    

            Transformer t;

            try {

                t = tf.newTransformer();

                ByteArrayOutputStream  bos  =  new  ByteArrayOutputStream();   

                t.transform(new DOMSource(doc), new StreamResult(bos));    

                xmlStr = bos.toString();    

            } catch (Exception e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }    

        return xmlStr;

    }

    

    public static Document stringToXml(String xmlStr){

            Document doc = null;

            StringReader sr = new StringReader(xmlStr);   

            InputSource is = new InputSource(sr);   

            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();   

            DocumentBuilder builder;

            try {

                builder = factory.newDocumentBuilder();

                doc = builder.parse(is);  

            } catch (Exception e) {

                e.printStackTrace();

            }    

         

        return doc;

    }

    

     /** 

     * Document 保存为 XML 文件 

     *  

     * @param doc Document对象 

     * @param path 文件路径 

     */  

    public static void doc2XML(Document doc, String path) {  

        try {  

            Source source = new DOMSource(doc);  

            Result result = new StreamResult(new File(path));  

            Transformer transformer = TransformerFactory.newInstance().newTransformer();  

            transformer.setOutputProperty(OutputKeys.INDENT, "yes");  

            transformer.transform(source, result);  

        } catch (Exception e) {  

            return;  

        }  

    }  

    

}

 dom4J 解析文档

org.dom4j.Element element =  doc.getRootElement();

        

        System.out.println(element.getName());



        

        List<org.dom4j.Element> iter = element.elements();

        

        for (org.dom4j.Element elem : iter) {

            System.out.println(elem.getName());

            if(elem.getName().equals("HeadInfo")){

                System.out.println(elem.attributeValue("PGMVersion"));

            };

            

            if(elem.getName().equals("PGM")){

                

                List<org.dom4j.Element> subIter = elem.elements();

                

                for (org.dom4j.Element el : subIter) {

                    

                    System.out.println(el.getName());

                    System.out.println(el.attributeValue("ItemType"));

                    if(el.attributeValue("ItemType").equals("1")){

                        

                        List<org.dom4j.Element> subEl = el.elements();

                        

                        for (org.dom4j.Element e : subEl) {

                            System.out.println(e.getName());

                        }

                    }

                }

                

            }

            

            

        }