用Node怎样做有模糊查询功能的搜索框？-群英

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在实际的应用中用搜索框查询时，经常会需要进行模糊查询操作，因此这篇文章就主要给大家分享怎样用Node实现有模糊查询功能的搜索框，下文有实现步骤和代码，感兴趣的朋友就接着往下看吧。

一、需求

点击导航栏中的搜索图，出现搜索框，从而进行文章的模糊查询

二、建表

1.blog表

添加外键：

2.nav表

3.type表

4.user表

三、页面及样式

like.ejs：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>查询</title>
    <link rel="stylesheet" href="/css/bootstrap.min.css" >
    <link rel="stylesheet" href="/css/index.css" >
    <script src="js/jquery-3.3.1.min.js"></script>
    <script src="js/index.js"></script>
</head>
<body>
    <%-include('detachPart/nav.ejs')%>
    <%-include('detachPart/search.ejs')%>
    <div class="container">
        <div class="row">
            <div class="col-lg-9">
                <%-include('bigPart/ownblog.ejs')%>
            </div>  
            <div class="col-lg-3">
                <%-include('smallPart/recommend.ejs')%>
                <%-include('smallPart/rank.ejs')%>
                <%-include('smallPart/rightimg_1.ejs')%>
                <%-include('smallPart/information.ejs')%>
                <%-include('smallPart/mylink.ejs')%>
            </div>
        </div>
    </div>
    <%-include('detachPart/footer.ejs')%>
</body>
</html>

search.ejs：

<div class="container searchclose">
    <form action="/like" method="GET">
        <input name="link" type="text" placeholder="请输入关键字词">
        <input type="submit" value="搜索">
        <img class="closebtn" src="image/icon/close.png" alt="">
    </form>
</div>

index.css：

.searchclose{
    display: none;
    position: relative;
    margin: 0.5rem auto;
    padding: 1rem 0;
    text-align: center;
    background-color: white;
}
.searchclose input:nth-child(1){
    width: 25rem;
    height: 2.2rem;
    outline: none;
    font-size: 0.9rem;
    padding-left: 0.5rem;
    border: 1px solid silver;
    box-sizing: border-box;
    vertical-align: middle;
}
.searchclose input:nth-child(2){
    display: inline-block;
    width: 10rem;
    height: 2.2rem;
    line-height: 2.2rem;
    background-color: rgb(41, 41, 41);;
    color: white;
    vertical-align: middle;
    border: 1px solid rgb(41, 41, 41);
    border-style: none;
    margin-left: -1rem;
}
.searchclose img{
    position: absolute;
    top: 0;
    right: 0;
}

index.js：

$(function(){
    $(".searchbtn").click(function(){
        $(".searchclose").show();
    });
    $(".closebtn").click(function(){
        $(".searchclose").hide();
    });
});

四、MySQL数据

connection.js：

var mysql=require("mysql");
var setting=require("./setting");
var connection;
var connectionmysql=function(){
    connection=mysql.createConnection({
        host:setting.host,
        port:setting.port,
        user:setting.user,
        password:setting.pwd,
        database:setting.base
    });
}
connectionmysql(); 
exports.select=function(str,callback){
    connectionmysql();  
    connection.query(str,function(err,res){
        if(err) throw err;
        callback(res);
        connection.end();  
    });
}   
exports.find=function(str,params,callback){
    connectionmysql();  
    connection.query(str,params,function(err,res){
        if(err) throw err;
        callback(res);
        connection.end();  
    });
}

sql.js：

module.exports={
    findTitle:"select * from nav",
    clickRank:"select id,title from blog order by num desc limit 7",
    recommendInfo:"select id,title,logo,recommend from blog where recommend=1 limit 8",
    likeBlog:"select blog.id,title,intro,logo,time,type.typeinfo,user.face from blog,

    type,user where blog.type=type.id and blog.face=user.id and title like ? order by time desc"
}

promise.js：

var mysql=require("../MySQL/connection");
var sql=require("../MySQL/sql");
module.exports={
    findTitle:function(){
        return new Promise(function(resolve){
            mysql.select(sql.findTitle,function(result){
                resolve(JSON.parse(JSON.stringify(result)));
            });
        })
    },
    clickRank:function(){
        return new Promise(function(resolve){
            mysql.select(sql.clickRank,function(result){
                resolve(JSON.parse(JSON.stringify(result)));
            });
        });
    },
    recommendInfo:function(){
        return new Promise(function(resolve){
            mysql.select(sql.recommendInfo,function(result){
                resolve(JSON.parse(JSON.stringify(result)));
            });
        });
    },
    likeBlog:function(msg){
        return new Promise(function(resolve){
            mysql.find(sql.likeBlog,msg,function(result){
                resolve(JSON.parse(JSON.stringify(result)));
            });
        });
    }
}

router.js：

var promise=require("../MySQL/promise");
var url=require("url");
module.exports=function(app){
    // 搜索框进行模糊查找
    app.get("/like",function(req,res){
        var likeurl=url.parse(req.url,true).query.link;
        async function getData(){
            var res1=await promise.findTitle();
            var res5=await promise.clickRank();
            var res11=await promise.recommendInfo();
            var res21=await promise.likeBlog("%"+likeurl+"%");
            var allres={
                titleindex:0,
                navres:res1,
                rankres:res5,
                recommendres:res11,
                blogres:res21
            }
            return allres;
        }
        getData().then(function(result){
            res.render("like",result);
        });
    });
}

注：like 路由中的blogres:res21和首页中的blogres:res10,所渲染到页面中的数据名称需一致，在此均为 blogres