treecontroller.java

动态加载树

package handler;

import java.io.PrintWriter;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import entity.Mytree;

import biz.IService;

public class TreeController implements Controller {
	private IService treeService;
	
	public void setTreeService(IService treeService) {
		this.treeService = treeService;
	}

	public ModelAndView handleRequest(HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/xml;charset=UTF-8");
		response.setHeader("Cache-Control", "no=cache");
		PrintWriter out=response.getWriter();
		String pid=request.getParameter("pid");
		String output="";
		output+="<tree>";
		try {
			List list=this.treeService.getTreeList(Integer.parseInt(pid));
			for (int i = 0; i < list.size(); i++) {
				Mytree tree=(Mytree)list.get(i);
				output+="<item id=\'"+tree.getId()+"\' isFolder=\'"+tree.getIsfolder();
				String link=tree.getLink();
				if (link!=null && !link.equals("")) {
					output+="\' link=\'"+tree.getLink();
				}
				output+="\'>"+tree.getText()+"</item>";
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		output+="</tree>";
		out.println(output);
//		System.out.println(output);
		out.flush();
		out.close();
		return null;
	}

}