jdom操作xml文件实例

最新推荐文章于 2022-08-07 00:09:35 发布

最新推荐文章于 2022-08-07 00:09:35 发布 · 150 阅读

文章标签：

#XML #Java

综合技术专栏收录该内容

3 篇文章

订阅专栏

本文介绍了一个使用Java进行XML文件读写的具体实例，包括解析XML文档、获取节点内容及添加新节点等操作。

package com.donson.common;

import java.io.File;
import java.io.FileOutputStream;
import java.io.Reader;
import java.io.StringReader;

import java.io.FileInputStream;
import java.util.List;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;

public class XmlOperate {

public static void main(String[] args) {
XmlOperate xo= new XmlOperate ();
xo.add();
}

//访问xml文件
private void printXmlContent(){
  SAXBuilder builder = new SAXBuilder();
  String fileContent = getXmlContent();
  try{
   Reader readStr = new StringReader(fileContent);
   Document doc = builder.build(readStr);
   Element root = doc.getRootElement();
   List childList = root.getChildren();
   System.out.println("list="+childList.size());
   for(int i=0;i     Element child = (Element)childList.get(i);
    System.out.println("ok="+child.getAttributeValue("ok"));
    System.out.println("id="+child.getChildTextTrim("id"));
    System.out.println("address="+child.getChildTextTrim("address"));
    System.out.println("text="+child.getTextTrim());

     Element cd = child.getChild("subx");//获取该节点下面的子节点
     if(cd!=null){
      System.out.println("cd-id="+cd.getChildText("id"));
      System.out.println("cd-value="+cd.getChildText("value"));
     }
   }
  }catch(Exception e){
   System.out.println(e.getMessage());
  }
}

//添加操作
private void add(){
  SAXBuilder builder = new SAXBuilder();
  String fileContent = getXmlContent();
  try{
   Reader readStr = new StringReader(fileContent);
   Document doc = builder.build(readStr);
   Element root = doc.getRootElement();
   List childList = root.getChildren();
   System.out.println("list="+childList.size());

   Element el = new Element("subroot");
   el.setAttribute("ok","true");
   el.setText("xxxx");
   Element id = new Element("id");
   id.setText("25");
   el.addContent(id);

   Element name = new Element("name");
   name.setText("guolp25");
   el.addContent(name);

   Element address = new Element("address");
   address.setText("深圳25");

   Element sex = new Element("sex");
   sex.setText("F25");
   el.addContent(sex);

   Element subx = new Element("subx");
    Element sid = new Element("id");
    sid.setText("s11");
    subx.addContent(sid);
    Element scontent = new Element("content");
    scontent.setText("最好操作");
    subx.addContent(scontent);
   subx.setAttribute("ok","true");
   el.addContent(subx);

   childList.add(el);
   Format format = Format.getCompactFormat();
   format.setEncoding("gbk");
   format.setIndent("    ");
   XMLOutputter XMLOut = new XMLOutputter(format);
   FileOutputStream writer = new FileOutputStream("d:\\test.xml");
   XMLOut.output(doc, writer);
   writer.close();
   readStr.close();
  }catch(Exception e){
   System.out.println(e.getMessage());
  }
}

private String getXmlContent(){
  String xmlfilepath = "d:\\test.xml";
  File file = new File(xmlfilepath);
  if(!file.exists() || file.length()<=0){
   return null;
  }else{
   FileInputStream fis = null;
   try{
    fis = new FileInputStream(file);
    long fileLength = file.length();
    byte[] fileBytes = new byte[(int)fileLength];
    fis.read(fileBytes);
    String fileData = new String(fileBytes);
    return fileData;
   }catch(Exception e){
    e.printStackTrace();
    return null;
   }finally{
    try{
     if(fis != null){
      fis.close();
      fis = null;
     }
    }catch(Exception e){
     e.printStackTrace();
    }
   }
  }
}
}