JAVA操作XML二(转换关系):String --document--xml --document--String

主要涉及转化:

从String转化为document再到xml

从xml转化为document再到String

xml转化为string：  

public   static   String   xmlFile2String(String   fileName)   throws   SAXException,   IOException,   ParserConfigurationException,   TransformerFactoryConfigurationError,   TransformerException

          {

             

                  DocumentBuilderFactory   documentBuilderFactory   =   DocumentBuilderFactory.newInstance();

                  InputSource   inputSource   =   new   InputSource(fileName);

                  Document   document   =   documentBuilderFactory.newDocumentBuilder().parse(inputSource);              

                  StringWriter   sw   =   new   StringWriter();

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

                  serializer.transform(new   DOMSource(document),   new   StreamResult(sw));

                  return   sw.toString();

          }

  doc转化为string：

          DOMSource   domSource   =   new   DOMSource(doc);

            StringWriter   writer   =   new   StringWriter();

            StreamResult   result   =   new   StreamResult(writer);

            TransformerFactory   tf   =   TransformerFactory.newInstance();

            Transformer   transformer   =   tf.newTransformer();

            transformer.transform(domSource,   result);

            System.out.println(   writer.toString());

doc转化为xml：

              TransformerFactory   tFactory   =   TransformerFactory.newInstance();

      Transformer   transformer   =   tFactory.newTransformer();

      DOMSource   source   =   new   DOMSource(doc);

      FileOutputStream   outStream   =   new   FileOutputStream( "outFile.xml ");

      StreamResult   result   =   new   StreamResult(outStream);

      transformer.transform(source,   result);  

 

doc的初始化：

                  DocumentBuilderFactory   dbf   =   DocumentBuilderFactory.newInstance();  

  DocumentBuilder   db   =   null;  

  try     {  

  db   =   dbf.newDocumentBuilder();  

  }   catch   (ParserConfigurationException   pce)   {  

  System.err.println(pce);  

  System.exit(1);  

  }  

  Document   doc   =   null;  

  doc   =   db.newDocument();  

 

 

用读文件的方式把xml变成string：

      FileInputStream   in   =   new   FileInputStream( "DataTest.xml ");

      BufferedInputStream   bufferin=new   BufferedInputStream(in);

      byte   c[]=   new   byte[1000];

      int   n=0;

      StringBuffer   bs=new   StringBuffer();

      while   ((n=bufferin.read(c))!=-1)

      {String   temp=new   String   (c,0,n);//                  

        bs.append(temp);                    

      }

String转成document的请看以下链接

http://www.blogjava.net/hopeshared/archive/2006/07/06/56919.aspx

有关经XSL文件转换为XML的请看:

http://blog.csdn.net/luweifeng1983/archive/2009/03/25/4022431.aspx