log4j直接在字符串中构建xml以及解析xml

通常可以使用在休息传输方面：

import java.io.StringReader;


import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;


public class XmlUtil {


/**
* 生成xml头文件
* @return
*/
private static Document constructDocument(){
Document document = DocumentHelper.createDocument();
Element root = DocumentHelper.createElement("message");
document.setRootElement(root);
return document;
}

/**
* 构建xml
* @param username
* @return
*/
public static String construtsXml(String username){

Document document = constructDocument();
Element root = document.getRootElement();
Element type = root.addElement("type");
type.setText("1");

Element user = root.addElement("user");
user.setText(username);

return document.asXML();
}

/**
* 解析xml
* @param xml
* @return
* @throws Exception
*/
public static String analysisXml(String xml) throws Exception{
     SAXReader saxReader = new SAXReader();
 Document document =  saxReader.read(new StringReader(xml));
 Element root = document.getRootElement();
 String rootName = root.getName();
 
 Element type = root.element("type");
 Element username = root.element("user");
 
 
 return rootName+": type="+type.getText()+", username="+username.getText();
}



}