用dom4j修改xml（增加修改节点）

用dom4j修改xml（增加修改节点）

博客分类：

• Java

XMLJavaMyeclipseServlet 

使用dom4j修改解析xml，xml文件的位置是配置在xml.properties文件中，程序打成jar包，在命令行中执行如下命令即可：

[img]http://dl.iteye.com/upload/attachment/150593/6b4ac972-cf45-3582-9a04-5e88bd0c962d.jpg" alt="[/img]

主要的java代码如下：

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;

import javax.servlet.http.HttpServlet;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;


public class RefreshXml extends HttpServlet {
    private String xmlFilePath="";

    public void modifyXml(String xmlProperty) throws DocumentException, IOException {
        this.getProperties(xmlProperty);
        File file = new File(xmlFilePath);
        SAXReader reader = new SAXReader();
        Document doc = reader.read(file);
        List list;

        /*
         * 修改EntityProps
         */
        list = doc.selectNodes("//Entity_Groups//Entity//EntityProps");
        System.out.println("需要修改的EntityProps一共有:"+list.size()+"处。");
        for(int i=0;i<list.size();i++){
            Element elt = (Element) list.get(i);
            Node node = elt.selectSingleNode("Definition");
            if(node == null){
                Element info = elt.addElement("Definition");
                info.addAttribute("xml:space", "preserve");
                info.addText(elt.selectSingleNode("Name").getText());
//              elt.selectSingleNode("Definition").setText(elt.selectSingleNode("Name").getText());
            }else{
                elt.selectSingleNode("Definition").setText(elt.selectSingleNode("Name").getText());
            }

        }

        /*
         * 修改AttributeProps
         */
        list = doc.selectNodes("//Entity_Groups//Entity//Attribute_Groups//Attribute//AttributeProps");
        System.out.println("需要修改的AttributeProps一共有:"+list.size()+"处。");
        for(int i=0;i<list.size();i++){
            Element elt = (Element) list.get(i);
            Node node = elt.selectSingleNode("Definition");
            if(node == null){
                                //增加节点
                Element info = elt.addElement("Definition");
                info.addAttribute("xml:space", "preserve");
                info.addText(elt.selectSingleNode("Name").getText());
//              elt.selectSingleNode("Definition").setText(elt.selectSingleNode("Name").getText());
            }else{
                elt.selectSingleNode("Definition").setText(elt.selectSingleNode("Name").getText());
            }
        }
        System.out.println("修改完毕！");

        XMLWriter writer = new XMLWriter(new FileOutputStream(file));
        writer.write(doc);
        writer.close();

    }

    private void getProperties(String xmlProperty) throws IOException{
        //String configFile = xmlProperty;
        String configFile = "D:/Workspaces for MyEclipse 7.1/RefreshXml/src/xml.properties";
        InputStream is = new BufferedInputStream(new FileInputStream(new File(configFile)));
        if(is == null){
            is = this.getServletContext().getResourceAsStream(configFile);
        }
        Properties ps = new Properties();
        ps.load(is);
        xmlFilePath = ps.getProperty("xmlPath");
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        if (args.length < 1) {
            System.out.println("请输入程序所需的配置文件路径作为参数:");
            System.out.println("1、要修改的xml文件的名称。");
        } else {
            String xmlProperty = args[0];
            System.out.println(xmlProperty);
            RefreshXml rx = new RefreshXml();
            try {
                rx.modifyXml(xmlProperty);
            } catch (DocumentException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

配置文件xml.properties中的内容也比较简单：
xmlPath=C\:\\test\\2222.xml

如下是程序jar包：
RefreshXml2.jar