Ajax实现搜索引擎自动补全功能

Search <input
     type="text" name="name" class="inputtable" 
     id="name" /> 
     <input type="image" src="images/serchbutton.gif"
     border="0" style="margin-bottom:-4px">

<div id="context1" style="background-color:white; border: 1px solid red;width:128px;position: absolute;top: 133px;left:944px;display:none" >
</div>

$(".inputtable").keyup(function(){
  var content=$(this).val();
  //如果当前搜索内容为空，无须进行查询
  if(content==""){
   $("#context1").css("display","none");
   return ;
  }
  //由于浏览器的缓存机制 所以我们每次传入一个时间
  var time=new Date().getTime();
  $.ajax({
   type:"get",
   //新建一个名为findBooksAjaxServlet的servlet
   url:"${pageContext.request.contextPath}/servlet/findBooksAjaxServlet",
   data:{name:content,time:time},
   success:function(data){
    //拼接html
    var res=data.split(",");
    var html="";
    for(var i=0;i<res.length;i++){
     //每一个div还有鼠标移出、移入点击事件
     html+="<div onclick='setSearch_onclick(this)' onmouseout='changeBackColor_out(this)' onmouseover='changeBackColor_over(this)'>"+res[i]+"</div>";
    }
    $("#context1").html(html);
    //显示为块级元素
    $("#context1").css("display","block");
   }
  });
 });

    var html="";
    for(var i=0;i<res.length;i++){
     //每一个div还有鼠标移出、移入点击事件
     html+="<div onclick='setSearch_onclick(this)' onmouseout='changeBackColor_out(this)' onmouseover='changeBackColor_over(this)'>"+res[i]+"</div>";
    }

//鼠标移动到内容上
 function changeBackColor_over(div){
  $(div).css("background-color","#CCCCCC");
 }
 //鼠标离开内容
 function changeBackColor_out(div){
  $(div).css("background-color","");
 }
 //将点击的内容放到搜索框
 function setSearch_onclick(div){
  $(".inputtable").val(div.innerText);
  $("#context1").css("display","none");
 }

public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  response.setContentType("text/html;charset=utf-8");
  request.setCharacterEncoding("utf-8");
  //获取搜索框输入的内容
  String name=request.getParameter("name");
  name=new String(name.getBytes("iso-8859-1"), "utf-8");
  //向server层调用相应的业务
  BooksServer booksServer=new BooksServer();
  String res=booksServer.findBooksAjax(name);
  //返回结果
  response.getWriter().write(res);
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {

  doGet(request, response);
 }

//查询所有的书本名
 public String findBooksAjax(String name) {
  List<Object> nameList=booksDao.findBooksAjax(name);
  String res="";
  for (int i=0;i<nameList.size();i++) {
   if(i>0){
    res+=","+nameList.get(i);
   }else{
    res+=nameList.get(i);
   }
  }
  return res;
 }

//根据部分书名，查询类似的书名
 public List<Object> findBooksAjax(String name) {
  QueryRunner qr=new QueryRunner(C3P0Util.getDataSource());
  try {
   return qr.query("select name from book where name like ?", new ColumnListHandler(),"%"+name+"%");
  } catch (SQLException e) {
   e.printStackTrace();
  }
  return null;
 }