Ajax实现搜索文本框自动联想功能，javassm框架面试重点

后台servlet代码：

package servlet;

import javax.servlet.servletexception;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.List;

@WebServlet("/Searchservlet")

public class Searchservlet extends HttpServlet {

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws servletexception, IOException {

//设置响应内容类型和编码格式

request.setCharacterEncoding(“utf-8”);

response.setContentType(“text/html;charset=utf-8”);

response.setCharacterEncoding(“utf-8”)

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;

//获取用户输入的内容

String name = request.getParameter(“name”);

//模拟数据库的查询操作

List list = new ArrayList<>();

list.add(“百度”);

list.add(“百事可乐”);

list.add(“百世快递”);

list.add(“百度翻译”);

list.add(“百度百科”);

list.add(“美国”);

list.add(“美元”);

list.add(“网易”);

list.add(“美团”);

list.add(“滴滴”);

list.add(“滴水”);

list.add(“小米”);

list.add(“小新”);

list.add(“OPPO”);

list.add(“三星”);

list.add(“花伤情犹在”);

list.add(“花朵”);

//定义变量将匹配结果保存起来

String info = “”;

//根据用户输入的内容语句数据库查询的结果进行比较

if (!"".equals(name)){

for (int i = 0; i < list.size(); i++) {

//toupperCase()将字符串转大写 toLowerCase()将字符串转小写—》目的忽略搜索时的字符串大小写

if (list.get(i).indexOf(name.toupperCase())>-1 || list.get(i).indexOf(name.toLowerCase())>-1){

if (i==list.size()-1){

info+=list.get(i);

}else {

info+=list.get(i)+",";

}