useraction.java

对初学者是个很有帮助的ajax试验demo

package com.accp.struts.action;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.accp.bean.NameService;


public class UserAction extends Action {
	private List names=new ArrayList();
	public void init() {
        System.out.println("===========>1.测试");
        names.add("abe");
        names.add("Abc");
        names.add("Abigail");
        names.add("Abnig");
        names.add("Ainni");
        names.add("Marry");
        names.add("Marcy");
        names.add("Marge");
        names.add("Marie");        
    }

	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws IOException {
		System.out.println("===========>3.测试");
        String prefix=request.getParameter("names");
        NameService service=NameService.getInstance(names);
        System.out.println("===========>5.测试");
        List matching=service.findNames(prefix);
        if(matching.size()>0){
            PrintWriter out=response.getWriter();
            
            response.setContentType("text/xml");
            response.setHeader("Cache-Control", "no-cache");
            
            out.println("<response>");
            Iterator iter=matching.iterator();
            while(iter.hasNext()){
                String name=(String) iter.next();
                out.println("<name>"+name+"</name>");
            }
            out.println("</response>");
            matching=null;
            service=null;
            out.close();
        }else{
            response.setStatus(HttpServletResponse.SC_NO_CONTENT);
        }
        return null;
    }



}