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JS+Ajax實現百度智能搜尋方塊，ajax智能搜尋
首先瀏覽實現後的結果，輸入一個a之後會出現包含a的下拉式清單，當我們點擊某一個的時候，搜尋方塊中就會出現點擊的值。實現所需要的主要是ajax+js。
前端search.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <html> <head> <title>Insert title here</title> <script src="js/jquery.min.js"></script> <style type="text/css"> *{ margin: 0 auto; padding: 0; } li{ margin:0; height: 20px; width: 200px; list-style: none; } /* #c li:HOVER{ background-color: #F9F9F9; } */ .onmouse{ background-color: #F9F9F9; } .outmouse{ background-color:white; } #contain{ width: 50%; } </style> <!-- jquery --> <script type="text/javascript"> var xmlHttp; function getMoreContents() { var content=document.getElementById("keyword"); if(content.value==""){ ClearContent(); return;//如果不設定，傳到背景是空值，所有的值都會被輸出 } xmlHttp=creatXMLHttp(); //alert(xmlHttp); //要給伺服器發送資料 var url="searchServlet?keyword="+escape(content.value); xmlHttp.open("GET",url,true); xmlHttp.onreadystatechange=callback; xmlHttp.send(null); } //擷取XMLHttp對象 function creatXMLHttp() { var xmlHttp; if(window.XMLHttpRequest){ xmlHttp=new XMLHttpRequest(); } if(window.ActiveXObject) { xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); if(!xmlHttp){ xmlHttp=new ActiveXOject("Msxml2.XMLHTTP"); } } return xmlHttp; } //擷取XMLHttp對象 function callback() { if(xmlHttp.readyState==4 && xmlHttp.status==200){ var result=xmlHttp.responseText; //解析資料 var json=eval("("+result+")"); //動態顯示資料，線束資料在輸入框對的下面 setContent(json); } } //設定關聯資料的展示 function setContent(contents) { ClearContent(); var size=contents.length; for(var i=0;i<size;i++) { var nextNode=contents[i];//json格式的第i個資料 var li =document.createElement("li"); li.onmouseover=function(){ this.className="onmouse"; document.getElementById("keyword").value=this.innerHTML; } li.onmouseout=function(){ this.className="outmouse"; } var text=document.createTextNode(nextNode); li.appendChild(text); document.getElementById("c").appendChild(li); } } //清空資料 function ClearContent() { document.getElementById("c").innerHTML=""; } //當控制項失去焦點時，清空資料 function outFouce() { ClearContent(); } //獲得焦點時， </script> </head> <body> <div id="contain"> <div style="height: 20px;"> <input type="text" id="keyword" style="size:50px;" onkeyup="getMoreContents()" onblur="outFouce()" onfocus="getMoreContents()"> <input type="button" id="bu" value="百度一下" style=""> </div> <div id="popDiv"> <ul id="c"> <li></li> </ul> </div> </div> </body> </html>
後台searchServlet.Java
package search; import java.io.IOException; import java.util.ArrayList; import java.util.List; import net.sf.json.JSONArray; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Servlet implementation class searchServlet */ @WebServlet("/searchServlet") public class searchServlet extends HttpServlet { private static final long serialVersionUID = 1L; static List<String> datas=new ArrayList<String>(); static {//假資料，類比資料庫讀取 datas.add("ajax"); datas.add("bjax"); datas.add("ajaxfd"); datas.add("bfvd"); datas.add("dafdx"); datas.add("fdax"); datas.add("ahg"); datas.add("ddx"); } /** * @see HttpServlet#HttpServlet() */ public searchServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doPost(request, response); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); String keyword=request.getParameter("keyword"); //System.out.println(keyword); List<String> listdata= getData(keyword); // 返回json,以流的形式寫到前台 response.getWriter().write(JSONArray.fromObject(listdata).toString()); } //擷取假資料中合格值 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; } }
xml配置
<span style="font-size:18px;"><strong><?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <servlet> <servlet-name>searchServlet</servlet-name> <servlet-class>search.searchServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>searchServlet</servlet-name> <url-pattern>/search/searchServlet</url-pattern> </servlet-mapping> <display-name>DropMeum</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app></strong></span>
目錄結構
總結
以上所述是小編給大家介紹的JS+Ajax實現百度智能搜尋方塊，希望對大家有所協助，如果大家有任何疑問請給我留言，小編會及時回複大家的。在此也非常感謝大家對幫客之家網站的支援！
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