dom4j的用法

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package xml;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

public class TestXML ...{
    //创建XML文档
    public static Document createDocument() ...{
        Document document = DocumentHelper.createDocument();
        Element root = document.addElement( "root" );

        Element author1 = root.addElement( "author" )
            .addAttribute( "name", "James" )
            .addAttribute( "location", "UK" )
            .addText( "James Strachan" );

        Element author2 = root.addElement( "author" )
            .addAttribute( "name", "Bob" )
            .addAttribute( "location", "US" )
            .addText( "Bob McWhirter" );

        return document;
    }
    //将文档内容输出到文件或控制台
    public static void write(Document document) throws IOException ...{

        // lets write to a file
        XMLWriter writer = new XMLWriter(
            new FileWriter( "output.xml" )
        );
        writer.write( document );
        writer.close();

        // Pretty print the document to System.out
        OutputFormat format = OutputFormat.createPrettyPrint();
        writer = new XMLWriter( System.out, format );
        writer.write( document );

        // Compact format to System.out
        format = OutputFormat.createCompactFormat();
        writer = new XMLWriter( System.out, format );
        writer.write( document );
    }
    //解析XML文件成Document ,url为文件路径
    public  static Document parse(String url) throws DocumentException ...{
        SAXReader reader = new SAXReader();
        Document document = reader.read(url);
        return document;
    }
    //read Docment内容
    public static  void read(Document document) throws DocumentException ...{

        Element root = document.getRootElement();

        // 从XML的根结点开始遍历
        for ( Iterator i = root.elementIterator(); i.hasNext(); ) ...{
            Element element = (Element) i.next();
                System.out.println(element.getName()+":"+element.getText());
        }

      /**//*  // iterate through child elements of root with element name "foo"
        for ( Iterator i = root.elementIterator( "foo" ); i.hasNext(); ) {
            Element foo = (Element) i.next();
            // do something
        }

        // iterate through attributes of root
        for ( Iterator i = root.attributeIterator(); i.hasNext(); ) {
            Attribute attribute = (Attribute) i.next();
            // do something
        }*/
     }

    //将document转化为String
    public static String XmlToString(Document document)...{
        return  document.asXML();
    }

    //将document转化为String
    public static Document StringToDocument(String text)...{
        try ...{
            return DocumentHelper.parseText(text);
        } catch (DocumentException e) ...{
            // TODO Auto-generated catch block
            e.printStackTrace();
            return null;
        }
    }
    public static void main(String[] args) throws IOException, DocumentException ...{
//        write(parse("E:/WebService/XFire/example/XFire/output.xml"));
        String str="<?xml version='1.0' encoding='utf-16'?> "+
  "<CurrentWeather>"+
  "<Location>Shanghai / Hongqiao, China (ZSSS) 31-10N 121-26E 3M</Location>"+
  "<Time>Aug 22, 2007 - 09:00 PM EDT / 2007.08.23 0100 UTC</Time>"+
  "<Wind> from the ESE (110 degrees) at 7 MPH (6 KT) (direction variable):0</Wind>"+
  "<Visibility> 4 mile(s):0</Visibility>"+
  "<SkyConditions> mostly clear</SkyConditions>"+
  "<Temperature> 87 F (31 C)</Temperature>"+
  "<DewPoint> 78 F (26 C)</DewPoint>"+
  "<RelativeHumidity> 74%</RelativeHumidity>"+
  "<Pressure> 29.77 in. Hg (1008 hPa)</Pressure>"+
  "<Status>Success</Status>"+
  "</CurrentWeather>";
        write(StringToDocument(str));
    }
}

SAX解析xml

1、使用绝对路径

// 解析XML文件成Document ,url为文件路径
   SAXReader reader = new SAXReader();
   Document document = null;

      String xmlFilePath = "d:/serialComm.xml";


   document = reader.read(xmlFilePath);
    InitSMSCat.log.info("串口配置文件的目录："+xmlFilePath);

   if(document == null)
   {
    InitSMSCat.log.info("配置文件serialComm.xml读取发生错误！！！");
    throw new Exception("配置文件serialComm.xml读取发生错误！！！");

   }
   // read Docment内容
   Element root = document.getRootElement();

   // 从XML的根结点开始遍历
   for (Iterator i = root.elementIterator(); i.hasNext();)
   {
    Element element = (Element) i.next();
    if(element.getName().equals("comm")) comm = element.getText();
   }

2、使用环境变量

// 解析XML文件成Document ,url为文件路径
   SAXReader reader = new SAXReader();
   Document document = null;

   InitSMSCat.log.info("环境变量SMS_HOME = "+System.getenv("SMS_HOME"));

      String xmlFilePath = "";
    if(Utility.getOsName().equals("windows"))
     xmlFilePath = System.getenv("SMS_HOME")+"";
    if(Utility.getOsName().equals("linux"))
     xmlFilePath = (System.getenv("SMS_HOME")+"/config/serialComm.xml").replace("\\", "/");

   document = reader.read(xmlFilePath);
    InitSMSCat.log.info("串口配置文件的目录："+xmlFilePath);

   if(document == null)
   {
    InitSMSCat.log.info("配置文件serialComm.xml读取发生错误！！！");
    throw new Exception("配置文件serialComm.xml读取发生错误！！！");

   }
   // read Docment内容
   Element root = document.getRootElement();

3、读取jar包中的xml文件

// 解析XML文件成Document ,url为文件路径
SAXReader reader = new SAXReader();
Document document = null;

   document = reader.read(this.getClass().getResourceAsStream("/serialComm.xml"));
   if(document == null)
   {
    InitSMSCat.log.info("配置文件serialComm.xml读取发生错误！！！");
    throw new Exception("配置文件serialComm.xml读取发生错误！！！");

   }
   // read Docment内容
   Element root = document.getRootElement();