ajax、jsp、dom4j

public class InfoServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//------------------      dom4j  --------------------------------------
		response.setCharacterEncoding("utf-8");
		response.setContentType("application/xml");
		PrintWriter out = response.getWriter();
		List<Student>list = new QueryStu().getStu();
		WriteXmlUtil.write(out,list,"bean.Student");
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}

package xmlUtil;

import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

public class WriteXmlUtil {

	public static <T> void write(PrintWriter out, List<T> list, String beanName) {
		// -----------  beanName get  --------------------------
		Class<?> clazz = null;
		try {
			clazz = Class.forName(beanName);
		} catch (ClassNotFoundException e1) {
			e1.printStackTrace();
		}
		Method methods[] = clazz.getMethods();
		List<Method> mGetList = new ArrayList<Method>();// javaBean    get  
		for (int i = 0; i < methods.length; i++) {
			int flag = methods[i].getName().indexOf("get");
			if (flag != -1) {
				mGetList.add(methods[i]);
			}
		}
		mGetList.remove(mGetList.size() - 1);//   getClass()  
		// ---------------------------------------------

		Document document = DocumentHelper.createDocument();
		Element root = DocumentHelper.createElement("root");
		document.setRootElement(root);//      
		for (int i = 0; i < list.size(); i++) {
			Element ele = root.addElement("childNode");//    
			for (int j = 0; j < mGetList.size(); j++) {
				Object obj = list.get(i);
				Element id = ele.addElement(mGetList.get(j).getName());
				try {
					Object value = mGetList.get(j).invoke(obj);//        value  
					id.setText(value.toString());//    
				} catch (IllegalArgumentException e) {
					e.printStackTrace();
				} catch (IllegalAccessException e) {
					e.printStackTrace();
				} catch (InvocationTargetException e) {
					e.printStackTrace();
				}
			}
		}
		OutputFormat format = new OutputFormat();
		format.setEncoding("UTF-8");
		XMLWriter writer = new XMLWriter(out, format);
		try {
			writer.write(document);
			writer.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}