dom4j 读取xml 和写回

[java]代码库

package cn.itcast.utils;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.UnsupportedEncodingException;

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

public class XmlUtils {

	
	// 获得代表 xml 文档 的 document 对象
	public static Document getDocument() {
		
		SAXReader reader = new SAXReader();
		
		try {
			return reader.read(new File("e:\\users.xml"));
		} catch (DocumentException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			throw new RuntimeException("对不起, 获得 xml 文件 失败 ");
		}
	}

	public static void write2Xml(Document rootElement) throws Exception {
		
		OutputFormat format = OutputFormat.createPrettyPrint();
		format.setEncoding("UTF-8");
	
		XMLWriter writer = new XMLWriter(new FileOutputStream("e:\\users.xml"), format);
		writer.write(rootElement);
		writer.close();
	}

}