SAXReader

说明:SAXReader主要用于解析XML文件,是当前比较流行的xml解决方案.
代码以基础类函数的形式展现如下:

	package com.dc.framework.taglib;   
	import java.io.FileInputStream;   
	import java.io.FileNotFoundException;   
	import java.util.HashMap;   
	import java.util.Iterator;   
	import java.util.List;   
	import java.util.Map;   
	import javax.servlet.ServletRequest;   
	import javax.servlet.http.HttpServletRequest;   
	import javax.servlet.jsp.JspTagException;   
	import javax.servlet.jsp.tagext.TagSupport;   
	import org.apache.commons.lang.StringUtils;   
	import org.dom4j.Document;   
	import org.dom4j.DocumentException;   
	import org.dom4j.Element;   
	import org.dom4j.io.SAXReader;   
	    
	  
	//自定义标签处理类   
	public class ReadUploadFile {   
	    // 配置文件的路径   
	    static String uploadCfgFile = "WEB-INF/conf/uploadfile.xml";    
	    //文档对象实体   
	    Document uploadDocument = null;   
	    //结果存储体   
	    Map uploadMap = new HashMap();   
	       
	 /**  
	  * @param request  
	  * @return  
	  * 获取配置文件绝对路径  
	  */  
	 private String getuploadCfgFile(ServletRequest request) {   
	      return ((HttpServletRequest) request).getSession().getServletContext().getRealPath(uploadCfgFile);   
	 }   
	    
	 /**  
	  * @param request  
	  * @return  
	  * 初始化配置文件  
	  */  
	 private Document inituploadCfgDocument(ServletRequest request) {   
	      SAXReader saxReader = new SAXReader();   
	      try {   
	          //得到指定文件以流的形式对文件进行序列化   
	          FileInputStream fis = new FileInputStream(getuploadCfgFile(request));   
	          uploadDocument = saxReader.read(fis);   
	      }   
	      catch (DocumentException e) {   
	          e.printStackTrace();   
	      }   
	      catch(FileNotFoundException fnfe){   
	          fnfe.printStackTrace();   
	      }   
	      return uploadDocument;   
	 }   
	    
	 /**  
	  * 获取配置文件  
	  *  
	  * @param request  
	  * @return  
	  */  
	 private Document getuploadCfgDocument(ServletRequest request) {   
	      if (this.uploadDocument == null) {   
	          this.uploadDocument = inituploadCfgDocument(request);   
	      }   
	      return this.uploadDocument;   
	 }   
	  
	 /**  
	  * @param request  
	  * @return  
	  * 获取某个指定preparents的配置属性  
	  */  
	 public Map getuploadMap(ServletRequest request) {   
	     //xml中的访问路径,说明欲处理XML文件的根元素是fileaction-configuration   
	     String xPath = "//fileaction-configuration/preparents";   
	     //获取按照指定搜索路径得到的元素列表,这里指获取所有的fileaction-configuration下的preparents元素   
	     List result = getuploadCfgDocument(request).selectNodes(xPath);   
	     //属性和指定子元素的存储体   
	     Map uploadMap = new HashMap();   
	     //遍历所得元素   
	     Iterator iter = result.iterator();   
	     while (iter.hasNext()) {      
	         //获得具体的preparents元素   
	         Element preparents = (Element) iter.next();   
	         // 取得preparents元素的id属性的值   
	         String id2 = preparents.attributeValue("id");   
	         // 取得preparents元素下子元素tabname的值,并与id2配对存储   
	         uploadMap.put(id2,   
	            StringUtils.trim(preparents.elementText("tabname")));      
	      }   
	      return uploadMap;   
	}   
	}