使用dom4j扩展xml文件

[paodan]

比如a.xml文件格式如下

<title>
  <info name = "liudehua"  id= "123" />
</title>

这个xml文件经常在添加新的信息的属性，但是其格式不变，比如添加<info name="limin" id="234" />等等这个的信息，如何把添加的插到原来的xml中，即

<title>
  <info name = "liudehua"  id= "123" />
  <info name="limin" id="234" />
</title>

[crazylaa]

package test;

import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

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 XMLTest {

	private String encode = "UTF-8";

	private Document doc;

	private Element root;

	private XMLTest() {
	}

	public static XMLTest initXML(File file) {
		XMLTest msg = new XMLTest();
		try {
			SAXBuilder sb = new SAXBuilder();
			msg.doc = sb.build(new FileReader(file));
			msg.root = msg.doc.getRootElement();
		} catch (Exception e) {
			msg = null;
		}
		return msg;
	}

	public boolean addNode(Element xmle) {
		if (xmle.getParent() != null)
			xmle.detach();
		root.addContent(xmle);
		return true;
	}

	public String toString() {
		try {
			XMLOutputter xmlOut = new XMLOutputter(Format.getPrettyFormat()
					.setOmitDeclaration(true).setEncoding(encode));
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			xmlOut.output(doc, out);
			return new String(out.toByteArray(), encode);
		} catch (IOException e) {
			return null;
		}
	}

	public static void main(String[] args) {
		BufferedWriter bw = null;
		try {
			File f = new File("F:\\test.xml");
			XMLTest xt = XMLTest.initXML(f);
			System.out.println(xt.toString());
			Element param = new Element("info");
			param.setAttribute("name", "limin");
			param.setAttribute("id", "234");
			xt.addNode(param);
			System.out.println(xt.toString());
			bw = new BufferedWriter(new FileWriter(f, false));
			bw.write(xt.toString());
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				bw.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}

[crazylaa]

结果：

IWAV0055I Java Bean test.XMLTest started with the main method
<title>
  <info name="liudehua" id="123" />
</title>


<title>
  <info name="liudehua" id="123" />
  <info name="limin" id="234" />
</title>

[paodan]

[Quote=引用 2 楼 crazylaa 的回复:]
结果：
Java code

IWAV0055I Java Bean test.XMLTest started with the main method<title><info name="liudehua" id="123"/></title><title><info name="liudehua" id="123"/><info name="limin" id="234"/></title>
[/Quote]辛苦了，这么晚。我希望用dom4j实现

[网站推广优化yetaoaiueo]

JDOM一样

工具而已

好使就行

[paodan]

[Quote=引用 4 楼 yetaodiao 的回复:]
JDOM一样

工具而已

好使就行
[/Quote]现在是接收到外部接口是dom4j的，以前没用过，所有不是很清楚，希望是dom4j的实现，然后好兼容

[xuyang840117]

XMLWriter writer = null;
		SAXReader saxReader = new SAXReader();
		OutputFormat format = OutputFormat.createPrettyPrint();
		format.setEncoding("UTF-8");// 设置XML文件的编码格式
		File file = new File("a.xml");
		//a.xml并添加內容 
		
		InputStreamReader reader = new InputStreamReader(file, "UTF-8");
        Document document = saxReader.read(reader);
        Element root = document.addElement("title");//根节点 
        //增加节点 
        Element element = root.addElement("info"); 
        element.addAttribute("name", "saxReader");//增加属性 
        element.addAttribute("id", "234");//增加属性 
        
        //写入文件 
        writer = new XMLWriter(new FileWriter(file),format); 
        writer.write(document); 
        writer.close();

[苍蝇①号]

楼上的把方法都说了，我是来接分的

[paodan]

结贴