bigautocomplete实现联想输入，自动补全

1、bigautocomplete是一款Jquery插件

2、效果图：

3、如何实现

3.1、 接下来就是实现，必须引入2个文件

引入jquery.bigautocomplete.js和jquery.bigautocomplete.css文件到你的页面中。

<link rel="stylesheet" href="/plugins/bigautocomplete/jquery.bigautocomplete.css">
<script src="/plugins/bigautocomplete/jquery.bigautocomplete.js"></script>

3.2、参数说明：

$("xxxxx").bigAutocomplete({data:[...],url:"",width:0,callback:{}})

参数	是否必须	说明
data	非必须	格式{data:[{title:null,result:{}},{title:null,result:{}}]}
url	非必须	url为字符串，用来ajax后台获取数据，返回的数据格式为data参数一样。
url和data	两个参数必须有一个	且只有一个生效，data优先。
width	非必须	下拉框的宽度，默认使用输入框宽度。
callback	非必须	选中行后按回车或单击时回调的函数，用于返回选中行的其他数据及做一些操作。

4、 具体本地示例

<label class="label-12" for="company_Name">企业名称</label>
<input type="text" class="form-control input-sm margin-r-5 margin-b-5" name="company_Name"
id="company_Name" placeholder="企业名称..."  >
<input type="hidden" id="company_Id">

$(function () {

$("#company_Name").bigAutocomplete({
width:258,
url:'/distribution/getCompanyName',
callback:function(data){
alert(data.result);
$('#company_Id').val(data.result.companyId);
}
});

});

5、 解释

这里输入引用文本采用url ajax后台取数方式获取下拉效果

这就是后台url 地址 ：

'/distribution/getCompanyName',

6、后端代码

@RequestMapping(value = "getCompanyName")
public String getCompanyName(String keyword){
logger.info("列表界面查询企业请求数据参数：companyName:   "+   keyword);
Map<String,Object> param = new HashMap<>();
param.put("companyName", keyword);
Map<String,Object> data =  distributionService.getCompanyName(param);
return GsonUtils.objectToJson(data);
}

public Map<String,Object> getCompanyName(Map<String, Object> param) {
ServiceResponse.Data data = this.getResponseData("/distribution/getAllLikeEntripriseList",param);
Map<String,Object> respMap = (Map<String, Object>)data.getItems();
return respMap;

}

public ServiceResponse getAllLikeEntripriseList(Map<String, Object> paramMap) {

ServiceResponse response = uCenterService.getCompanyName(paramMap);

if (EnumStatusCode.U_000000.getCode().equals(response.getMeta().getStatus())) {
Map<String, Object> resultList = (Map<String, Object>) response.getData().getItems();

if (resultList != null && resultList.size() > 0) {
List<Map<String, Object>> companyList = (List<Map<String, Object>>) resultList.get("list");
List<Map<String, Object>> companyresultList = new ArrayList<>();
for(Map<String, Object> resultMap : companyList){
Map<String, Object> RESULT = new HashMap<>();
RESULT.put("title",resultMap.get("companyName"));
Map<String, Object> ids = new HashMap<>();
ids.put("companyId",resultMap.get("companyId"));
RESULT.put("result",ids);
companyresultList.add(RESULT);
}

Map<String, Object> RESULT = new HashMap<>();
RESULT.put("data",companyresultList);
response.getData().setItems(RESULT);

}
}

return response;

}

7、最后送上bigautocomplete 的css和js

js：

/**
* Created by shenjd (shenjd@51lick.com) on 2017/8/26.
*/

(function($){
var bigAutocomplete = new function(){
this.currentInputText = null;//目前获得光标的输入框（解决一个页面多个输入框绑定自动补全功能）
this.functionalKeyArray = [9,20,13,16,17,18,91,92,93,45,36,33,34,35,37,39,112,113,114,115,116,117,118,119,120,121,122,123,144,19,145,40,38,27];//键盘上功能键键值数组
this.holdText = null;//输入框中原始输入的内容

//初始化插入自动补全div，并在document注册mousedown，点击非div区域隐藏div
this.init = function(){
$("body").append("<div id='bigAutocompleteContent' class='bigautocomplete-layout'></div>");
$(document).bind('mousedown',function(event){
var $target = $(event.target);
if((!($target.parents().andSelf().is('#bigAutocompleteContent'))) && (!$target.is(bigAutocomplete.currentInputText))){
bigAutocomplete.hideAutocomplete();
}
})

//鼠标悬停时选中当前行
$("#bigAutocompleteContent").delegate("tr", "mouseover", function() {
$("#bigAutocompleteContent tr").removeClass("ct");
$(this).addClass("ct");
}).delegate("tr", "mouseout", function() {
$("#bigAutocompleteContent tr").removeClass("ct");
});

//单击选中行后，选中行内容设置到输入框中，并执行callback函数
$("#bigAutocompleteContent").delegate("tr", "click", function() {
bigAutocomplete.currentInputText.val( $(this).find("div:last").html());
var callback_ = bigAutocomplete.currentInputText.data("config").callback;
if($("#bigAutocompleteContent").css("display") != "none" && callback_ && $.isFunction(callback_)){
callback_($(this).data("jsonData"));

}
bigAutocomplete.hideAutocomplete();
})

}

this.autocomplete = function(param){

if($("body").length > 0 && $("#bigAutocompleteContent").length <= 0){
bigAutocomplete.init();//初始化信息
}

var $this = $(this);//为绑定自动补全功能的输入框jquery对象

var $bigAutocompleteContent = $("#bigAutocompleteContent");

this.config = {
//width:下拉框的宽度，默认使用输入框宽度
width:$this.outerWidth() - 2,
//url：格式url:""用来ajax后台获取数据，返回的数据格式为data参数一样
url:null,
/*data：格式{data:[{title:null,result:{}},{title:null,result:{}}]}
url和data参数只有一个生效，data优先*/
data:null,
//callback：选中行后按回车或单击时回调的函数
callback:null};
$.extend(this.config,param);

$this.data("config",this.config);

//输入框keydown事件
$this.keydown(function(event) {
switch (event.keyCode) {
case 40://向下键

if($bigAutocompleteContent.css("display") == "none")return;

var $nextSiblingTr = $bigAutocompleteContent.find(".ct");
if($nextSiblingTr.length <= 0){//没有选中行时，选中第一行
$nextSiblingTr = $bigAutocompleteContent.find("tr:first");
}else{
$nextSiblingTr = $nextSiblingTr.next();
}
$bigAutocompleteContent.find("tr").removeClass("ct");

if($nextSiblingTr.length > 0){//有下一行时（不是最后一行）
$nextSiblingTr.addClass("ct");//选中的行加背景
$this.val($nextSiblingTr.find("div:last").html());//选中行内容设置到输入框中

//div滚动到选中的行,jquery-1.6.1 $nextSiblingTr.offset().top 有bug，数值有问题
$bigAutocompleteContent.scrollTop($nextSiblingTr[0].offsetTop - $bigAutocompleteContent.height() + $nextSiblingTr.height() );

}else{
$this.val(bigAutocomplete.holdText);//输入框显示用户原始输入的值
}

break;
case 38://向上键
if($bigAutocompleteContent.css("display") == "none")return;

var $previousSiblingTr = $bigAutocompleteContent.find(".ct");
if($previousSiblingTr.length <= 0){//没有选中行时，选中最后一行行
$previousSiblingTr = $bigAutocompleteContent.find("tr:last");
}else{
$previousSiblingTr = $previousSiblingTr.prev();
}
$bigAutocompleteContent.find("tr").removeClass("ct");

if($previousSiblingTr.length > 0){//有上一行时（不是第一行）
$previousSiblingTr.addClass("ct");//选中的行加背景
$this.val($previousSiblingTr.find("div:last").html());//选中行内容设置到输入框中

//div滚动到选中的行,jquery-1.6.1 $$previousSiblingTr.offset().top 有bug，数值有问题
$bigAutocompleteContent.scrollTop($previousSiblingTr[0].offsetTop - $bigAutocompleteContent.height() + $previousSiblingTr.height());
}else{
$this.val(bigAutocomplete.holdText);//输入框显示用户原始输入的值
}

break;
case 27://ESC键隐藏下拉框

bigAutocomplete.hideAutocomplete();
break;
}
});

//输入框keyup事件
$this.keyup(function(event) {
var k = event.keyCode;
var ctrl = event.ctrlKey;
var isFunctionalKey = false;//按下的键是否是功能键
for(var i=0;i<bigAutocomplete.functionalKeyArray.length;i++){
if(k == bigAutocomplete.functionalKeyArray[i]){
isFunctionalKey = true;
break;
}
}
//k键值不是功能键或是ctrl+c、ctrl+x时才触发自动补全功能
if(!isFunctionalKey && (!ctrl || (ctrl && k == 67) || (ctrl && k == 88)) ){
var config = $this.data("config");

var offset = $this.offset();
$bigAutocompleteContent.width(config.width);
var h = $this.outerHeight() - 1;
$bigAutocompleteContent.css({"top":offset.top + h,"left":offset.left});

var data = config.data;
var url = config.url;
var keyword_ = $.trim($this.val());
if(keyword_ == null || keyword_ == ""){
bigAutocomplete.hideAutocomplete();
return;
}
if(data != null && $.isArray(data) ){
var data_ = new Array();
for(var i=0;i<data.length;i++){
if(data[i].title.indexOf(keyword_) > -1){
data_.push(data[i]);
}
}

makeContAndShow(data_);
}else if(url != null && url != ""){//ajax请求数据
$.post(url,{keyword:keyword_},function(result){
makeContAndShow(result.data)
},"json")
}

bigAutocomplete.holdText = $this.val();
}
//回车键
if(k == 13){
var callback_ = $this.data("config").callback;
if($bigAutocompleteContent.css("display") != "none"){
if(callback_ && $.isFunction(callback_)){
callback_($bigAutocompleteContent.find(".ct").data("jsonData"));
}
$bigAutocompleteContent.hide();
}
}

});

//组装下拉框html内容并显示
function makeContAndShow(data_){
if(data_ == null || data_.length <=0 ){
return;
}

var cont = "<table><tbody>";
for(var i=0;i<data_.length;i++){
cont += "<tr><td><div>" + data_[i].title + "</div></td></tr>"
}
cont += "</tbody></table>";
$bigAutocompleteContent.html(cont);
$bigAutocompleteContent.show();

//每行tr绑定数据，返回给回调函数
$bigAutocompleteContent.find("tr").each(function(index){
$(this).data("jsonData",data_[index]);
})
}

//输入框focus事件
$this.focus(function(){
bigAutocomplete.currentInputText = $this;
});

}
//隐藏下拉框
this.hideAutocomplete = function(){
var $bigAutocompleteContent = $("#bigAutocompleteContent");
if($bigAutocompleteContent.css("display") != "none"){
$bigAutocompleteContent.find("tr").removeClass("ct");
$bigAutocompleteContent.hide();
}
}

};

$.fn.bigAutocomplete = bigAutocomplete.autocomplete;

})(jQuery)

css:

@charset "utf-8";
.bigautocomplete-layout{display:none;background-color:#FFFFFF;border:1px solid #BCBCBC;position:absolute;z-index:9999 !important;max-height:220px;overflow-x:hidden;overflow-y:auto; text-align:left;}
.bigautocomplete-layout table{border-collapse:collapse;border-spacing:0;background:none repeat scroll 0 0 #FFFFFF;width:100%;cursor:default;}
.bigautocomplete-layout table tr{background:none repeat scroll 0 0 #FFFFFF;}
.bigautocomplete-layout .ct{background:none repeat scroll 0 0 #D2DEE8 !important;}
.bigautocomplete-layout div{word-wrap:break-word;word-break:break-all;padding:1px 5px;}