一直想找一个可以连接后台，可以根据后台内容的input输入框，可以实现联想功能，网上找到一个简单的静态页面的输入框联想，经过一番修改之后终于可以实现读取自己定义的数组的联想了，其实也比较简单就是格式的问题。还是直接上代码吧。
首先是一个简单的界面
auto.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>input自动补全</title>
<link rel="stylesheet" type="text/css" href="auto.css" />
</head>
<body>
<div class="wrap">
<input type="text" id="input" class="auto-inp">
<div class="auto hidden" id="auto">
<div class="auto_out">1</div>
<div class="auto_out">2</div>
</div>
</div>
<%String[] a = {"a12","124","15"};
out.print(a[1]);
%>
<script src="auto.js"></script>
<script>
//var array = [‘b12‘,‘b22‘,‘固戍‘,‘b4‘,‘b5‘,‘b6‘,‘如果爱‘,‘b7‘,‘b8‘,‘b2‘,‘abd‘,‘ab‘,‘西乡‘,‘accd‘,‘abd‘,‘qq音乐‘,‘b1‘,‘cd‘,‘ccd‘,‘cbcv‘,‘小王子‘,‘cxf‘,‘b0‘];
var array=[
<%for(int i = 0 ; i < 3;i++)
{
%>
‘<%=a[i]%>‘, //一定要加上单引号
<%
}
%>
]
var autoComplete = new AutoComplete("input","auto",array);
document.getElementById("input").onkeyup = function(event){
autoComplete.start(event);
}
</script>
</body>
</html>
为了实现联想的内容是自己程序里的数组，我用了一个循环，将java中的数组添加到了js中，改了好长时间，后来才想到，对于js数组中还有其固定的格式，加了一个‘ <%=a[]%>’号之后就成了
然后对界面进行设计
auto.css
div,p,h1,h2,h3,h4,h5,h6,ul,li,span,input{
box-sizing: border-box;
font: 14px/20px "microsoft yahei";
}
div.wrap{
width: 240px;
margin: 20px auto 0 auto;
}
.auto-inp{
width: 240px;
height: 36px;
padding-left: .5em;
border-radius: 2px;
border: 1px solid #dedede;
color: #666;
outline: none;
}
.auto{
width: 240px;
border: 1px solid #dedede;
border-top: none;
position: absolute;
}
.auto_out{
width: 238px;
height: 36px;
line-height: 36px;
padding-left: .5em;
color: #000;
background: #fff;
overflow: hidden;
white-space: nowrap;
-o-text-overflow: ellipsis;
text-overflow: ellipsis;
}
.auto_out.on{
background: #eee;
cursor: pointer;
}
.hidden{
display: none;
}
然后就是主要起作用的部分了
auto.js:
// 数组去重
Array.prototype.unique = function(){
this.sort();
var res = [];
var json = {};
for (var i = 0; i < this.length; i++) {
if(!json[this[i]]){
res.push(this[i]);
json[this[i]] = 1;
}
}
return res;
}
// 对样式操作
var setClass = {
hasClass: function(elements,cName){ // 判断是否含有某个class
if(elements.className.match(new RegExp( "(\\s|^)" + cName + "(\\s|$)") ))
return true;
else
return false;
},
addClass: function(elements,cName){ // 添加class
if( !this.hasClass( elements,cName ) ){
elements.className += " " + cName;
};
},
removeClass: function(elements,cName){ // 移除某个class
if( this.hasClass( elements,cName ) ){
elements.className = elements.className.replace( new RegExp( "(\\s|^)" + cName + "(\\s|$)" )," " );
}
}
}
var Bind = function(This){
return function(){
This.init();
}
}
function AutoComplete(input,auto,arr) {
this.obj = document.getElementById(input);
this.autoObj = document.getElementById(auto);
this.search_value = ""; //当前的搜索输入值
this.index = -1; //当前选中的DIV的索引
this.value_arr = arr; //数据库中供检索的值 不包含重复值
}
AutoComplete.prototype = {
// 初始化
init: function(){
var This = this;
setClass.removeClass(This.autoObj,"hidden");
this.autoObj.style.left = this.obj.offsetLeft + "px";
this.autoObj.style.top = this.obj.offsetTop + this.obj.offsetHeight + "px";
},
//删除自动完成需要的所有DIV
deleteDIV: function(){
while(this.autoObj.hasChildNodes()){
this.autoObj.removeChild(this.autoObj.firstChild);
}
setClass.addClass(this.autoObj,"hidden");
},
autoOnmouseover: function(index){
if(index != this.index){
setClass.addClass(this.autoObj.children[index],"on");
setClass.removeClass(this.autoObj.children[this.index],"on");
this.index = index;
}
},
setValue: function(This){
return function(){
This.obj.value = this.seq;
setClass.addClass(This.autoObj,"hidden");
}
},
// 响应键盘
pressKey: function(event){
var code = event.keyCode;
var length = this.autoObj.children.length;
if(code == 38){ //↑
setClass.removeClass(this.autoObj.children[this.index],"on");
this.index--;
if(this.index < 0){
this.index = length - 1;
}
setClass.addClass(this.autoObj.children[this.index],"on");
this.obj.value = this.autoObj.children[this.index].seq;
}else if(code == 40){ //↓
setClass.removeClass(this.autoObj.children[this.index],"on");
this.index++;
if(this.index > length-1){
this.index = 0;
}
setClass.addClass(this.autoObj.children[this.index],"on");
this.obj.value = this.autoObj.children[this.index].seq;
}else{ //回车
this.obj.value = this.autoObj.children[this.index].seq;
setClass.addClass(this.autoObj,"hidden");
this.index = -1;
}
},
// 程序入口
start: function(event){
event = event || window.event;
var code = event.keyCode;
var This = this;
if(code != 13 && code != 38 && code != 40){
this.init();
this.deleteDIV();
this.search_value = this.obj.value;
var valueArr = this.value_arr.unique();
//去掉前后空格不能为空
if(this.obj.value.replace(/(^\s*)|(\s*$)/g,"") == ""){ return;}
//判断数组中是否含有输入的关键字
try{
var reg = new RegExp("("+ this.obj.value +")","i"); //输入"aaa" 则 reg = /(aaa)/i
}catch(e){
alert(e.message);
}
var div_index = 0; //记录匹配索引个数
for (var i = 0; i < valueArr.length; i++) {
if(reg.test(valueArr[i])){
var div = document.createElement("div");
div.className = "auto_out";
div.seq = valueArr[i];
div.index = div_index;
div.innerHTML = valueArr[i].replace(reg,"<strong>$1</strong>");
this.autoObj.appendChild(div);
setClass.removeClass(this.autoObj,"hidden");
div_index++;
if(div_index == 1) {
setClass.addClass(this.autoObj.firstChild,"on");
this.index = 0;
}
div.onmouseover = function(){
This.autoOnmouseover(this.index);
}
div.onclick = this.setValue(This);
}
}
}else{
this.pressKey(event);
}
window.onresize = Bind(This);
}
}
原文地址：https://www.cnblogs.com/1gaoyu/p/11875588.html
时间： 2024-08-30 04:21:07