servlet+ajax实现搜索框智能提示之servlet

package com.imooc;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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

import net.sf.json.JSONArray;

public class SearchServlet extends HttpServlet {

static List<String> datas=new ArrayList<String>();
static{
    //这些是模拟数据
    datas.add("ajax");
    datas.add("ajax post");
    datas.add("becky");
    datas.add("bill");
    datas.add("james");
    datas.add("jerry");
}

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    request.setCharacterEncoding("utf-8");
    response.setCharacterEncoding("utf-8");

    //System.out.println("123");
    //首先获得客户端发送来的数据keyword
    String keyword=request.getParameter("keyword");
    //获得关键字之后进行处理,得到关联数据
    List<String> listData=getData(keyword);
    //返回JSON格式
    //System.out.println(JSONArray.fromObject(listData)); //["ajax","ajax post","james"]
    response.getWriter().write(JSONArray.fromObject(listData).toString());
}

//获得关联数据的方法
public List<String> getData(String keyword){

    List<String> list=new ArrayList<String>();

    for(String data:datas){
        if(data.contains(keyword)){
            list.add(data);         
        }
    }

    return list;
}

}