dom4j读xml的属性

<?xml version="1.0" encoding="UTF-8"?>
<forbid>
<startday>2008-01-01</startday>
<endday>2008-07-19</endday>
<province>1</province>
<university>1</university>
<number>10</number>
<number_out></number_out>
</forbid>
这个是我的XML。凡是没有现成的，看看你就知道了，差不多。下面是我自己写的
有读  写和新建的功能
package com.xxxxx.platform.xxxxx.utils;import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.List;import javax.servlet.ServletConfig;
import javax.servlet.http.HttpServletRequest;import org.apache.log4j.Logger;
import org.apache.struts2.ServletActionContext;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;import com.xxxxx.platform.xxxxx.utils.HandupInitialiser.xxxxx;public class RWXml { private final static Logger _logger = Logger.getLogger(FtpClientUtil.class);
public void setXMLParameter(String title,String key,String value,String filepath){

HttpServletRequest request = ServletActionContext.getRequest();
String path=request.getSession().getServletContext().getRealPath("");
path=path+filepath;

try{
           SAXReader saxReader = new SAXReader();
           Document document = saxReader.read(new File(path));
           /*
            * XML文件操作
            */
           /** 过得要插入的节点 */
           String nod = title+"/"+key;
           /** 定位节点 */
           List list = document.selectNodes(nod);
           Iterator iter = list.iterator();
           if(iter.hasNext()){
               Element Element = (Element)iter.next();
               Element.setText(value);
           }
           try{
               /** 将document中的内容写入文件中 */
               XMLWriter writer = new XMLWriter(new FileWriter(new File(path)));
               writer.write(document);
               writer.close();
           }catch(Exception ex){
               ex.printStackTrace();
           }

        }catch(Exception ex){
           ex.printStackTrace();
       }
}
public String getXMLParameter(String title,String key,String filepath){ HttpServletRequest request = ServletActionContext.getRequest();
String path=request.getSession().getServletContext().getRealPath("");
path=path+filepath;
String value=new String();
try{
SAXReader saxReader = new SAXReader();
Document document = saxReader.read(new File(path));
String nod = title+"/"+key; List list = document.selectNodes(nod);
        Iterator iter = list.iterator();
        while(iter.hasNext()){
            Element Element = (Element)iter.next();
                value = Element.getText();
            }
}catch(Exception e){
e.printStackTrace();
}
       return value;
    }

/**
     * 生成XML文件
     */
    public void creatXML(String remoteFile,String home_url){
     String fielname = "_downfiledXML.xml";

     _logger.info("home_url="+home_url);
     String url = home_url+fielname;
     File f = new File(url);
     Date date = new Date();
     String date1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);
     if(!f.exists()){
     Document document = DocumentHelper.createDocument();//创建Document对象
     Element catalogElement = document.addElement("datas");//创建节点名为"datas"的一级节点
     Element book = catalogElement.addElement("book");//在一级节点"datas"下创建节点名为"book"的二级节
     // book.addAttribute("id",i+"");//在"book"节点上加一个属性名为"bookid"值为bookid的属性
     Element dates = book.addElement("date");//在"book"下创建节点名为"lookCount"的节点
     dates.setText(date1);
     Element urls = book.addElement("url");
     urls.setText(remoteFile);
     XMLWriter output;//输出流写XML文件
             try {
                  OutputFormat format = new OutputFormat("  ", true, "GB2312");
                  output = new XMLWriter(new FileWriter(new File(url)), format);
                  output.write(document);
                  output.close();
             } catch (IOException e) {
                  e.printStackTrace();
             }
     }else{
     SAXReader saxReader = new SAXReader();
     Document document = null;
     try {
document = saxReader.read(new File(url));
} catch (DocumentException e1) {
e1.printStackTrace();
}
     Element rootElement =(Element)document.getRootElement();//获取XML的根节点
     Element book = rootElement.addElement("book");//增加book节点
     // book.addAttribute("id",(i++)+"");//在"book"节点上加一个属性名为"bookid"值为bookid的属性
     Element dates = book.addElement("date");//在"book"下创建节点名为"lookCount"的节点
     dates.setText(date1);
     Element urls = book.addElement("url");
     urls.setText(remoteFile);
     XMLWriter output;
             try{
         OutputFormat format = new OutputFormat("", true, "GB2312");
         output = new XMLWriter(new FileWriter(new File(url)), format);
         output.write(document);
         output.close();
   }catch (IOException e) {
         e.printStackTrace();
   }
     }

    }
}调用方法：
在CLASS中：    private RWXml wa = new RWXml();String value = wa.getXMLParameter(title, nod,filepath); //title 是主节点，nod 是要查询的节点 filepath 是XML的存储地址，我是用相对地址
                                                                       //  /WEB-INF/write.xml
String value = wa.setXMLParameter(title, nod, insert_value, filepath);//insert_value 是要插入的值注意，所有的参数都是String 其他的类型要转换后再使用。希望能帮到你

调试易

dom4j读xml的属性

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