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HashMap'类型的对象上找不到属性或字段'timestamp'

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org.springframework.expression.spel.SpelEvaluationException: EL1008E: Property or field 'timestamp' cannot be found on object of type 'java.util.HashMap' - maybe not public?

收缩分辨率的时候改变导航栏

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响应式

class="cursor-pointer"> 详细描述

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 <header>
        <div class="coze ">
            <div class="phone">客服热线：010-594-78634</div>
            <div class="telephony">
                <div class="chat"></div>
                <div class="chew"></div>
                <div class="the"></div>
            </div>
        </div>
        <div class="tag">
            <div class="jinengshu"> 技能树</div>
            <div class="guanyu">
                <a href="#" class="zhiye">首页</a>
                <a href="#" class="zhiye">职业</a>
                <a href="#" class="zhiye">推存</a>
                <a href="#" class="zhiye">关于</a>
            </div>
        </div>
        <div class="mark"></div>
    </header>
    <main>
        <div class="tally">
            <span>首页></span>
            <span class="business">合作企业</span>

bootstrap,导航栏组的颜色怎么更改?

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class="cursor-pointer"> 详细描述

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  <!--nav-->
        <div class="container-fluid  nav-container">
            <div class="row">
                <div class="col-sm-8 offset-sm-2">
                    <nav class="navbar navbar-expand-sm navbar-dark" style="padding:0">
                        <a class="navbar-brand" href="#">
                         <img style="width:20rem" src="home-logo-hs.png" />
                        </a>
                        <button class="navbar-toggler" type="button" data-toggle="collapse"
                            data-target="#collapsiblejnshu">
                            <span class="navbar-toggler-icon"></span>
                        </button>
                        <div class="collapse navbar-collapse" id="collapsiblejnshu">
                            <ul class="navbar-nav justify-content-end" style="width:100%">
                                <!--链接组(导航组)-->
                                <li class="nav-item">

                                    <a class="nav-link nav-a" href="task8-1.html">首页 </a>
                                    <div class="nav-li"></div>

                                    <!--链接-->
                                </li>
                                <li class="nav-item">
                                    <a class="nav-link nav-a" href="../task8.1.3/task8-3.html">职业</a>
                                    <div class="nav-li"></div>
                                    <!--链接-->
                                </li>
                                <li class="nav-item ">
                                    <a class="nav-link nav-a" href="../task8.1.3/task8-3.html">推荐</a>
                                    <div class="nav-li"></div>
                                    <!--链接-->
                                </li>
                                <li class="nav-item">
                                    <a class="nav-link nav-a" href="../task8.1.2/task8-2.html">关于</a>
                                    <div class="nav-li"></div>
                                    <!--链接-->
                                </li>
                            </ul>
                        </div>
                    </nav>
                </div>
            </div>
        </div>
/*nav样式*/
.nav-container {
    background-color: rgb(41, 176, 120);
    color: white;
}

.nav-a {
    font-size: 1.7rem;
    padding: 20px 0 20px 10px;

}

.nav-item:hover .nav-li {
    visibility: visible;
}

.nav-li {
    visibility: hidden;
    border-bottom: 1px solid white;

}

盒子一直不能自适应。

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九宫格

class="cursor-pointer"> 详细描述

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.swag{
  padding-left:31%;
  padding-bottom: 31%;
  margin:1%;
  border-radius: 20%;
  background: orange;
  float:left;
}

任务四中滑动条的问题

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class="cursor-pointer"> 详细描述

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class="cursor-pointer"> 代码

.track {
    margin: 0 auto 10px;
    width: 95%;
    height: 60px;
    background: #ffffff; 
    .t-left {
        float: left;
        margin: 15px 0 0 2.5%;
        border-radius: 6px;
        width: 30px;
        height: 30px;
        font-size: 30px;
        text-align: center;
        line-height: 28px;
        color: #ffffff;
        background: #FBB435;
        cursor: pointer;
    }
    .t-right {
        @extend .t-left;
        float: right;
        margin: 15px 2.5% 0 0;
    }
}
.input1 {
    display: block;
    margin: 0 auto 10px;
    width: 80%;
    height: 60px;
    outline: none;
    -webkit-appearance: none; 
}
.input1::-webkit-slider-runnable-track {
    height: 8px;
    border-radius: 6px;
    box-shadow: inset 0 1px 2px gray;
    background: -webkit-linear-gradient(right,#059CFA, #059CFA) no-repeat;
    background-size: calc(100% / 14 * 4) 100%;
}
.input1::-webkit-slider-thumb {
    margin-top: -11px;
    border-radius: 15px;
    width: 30px;
    height: 30px;
    background: url(../../img/skill.jpg) 0 0/30px 30px;
    -webkit-appearance: none;
}

在header中运用absolute出现的问题

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class="cursor-pointer"> 详细描述

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.triangle {
    width: 0;
    height: 0;
    border-width: 10px 10px 0;
    border-style: solid;
    border-color: #b9e9f5 transparent transparent;
    margin: 10px auto;
}

flex布局

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class="cursor-pointer"> 详细描述

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align-center:stretch

border在浏览器中显示的最小宽度

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属性

class="cursor-pointer"> 详细描述

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    border: 0.05rem solid #c9c9c9;

用雪碧图制作图标时位置不准，无法调背景图的位置。

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雪碧图 CSS Sprite 定位

class="cursor-pointer"> 详细描述

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 <div class="btn-group">
        <button type="button" class="btn btn-default">找雇主</button>
        <button type="button" class="btn btn-default">找护工</button>
    </div>
    <button class="map"></button>

css：
.map{
    position: absolute;
    top: 0.2rem;
    right: 0.3rem;
    width: 0.42rem;
    height:0.45rem;
    border: 0;
    background-size: 4.92rem 0.96rem;
    background: url(img.png) no-repeat;
    background-position:  -2.44rem 0;
    border: none;
    outline: none;
}

怎么将公司的github和自己的github关联起来

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代码管理 git

class="cursor-pointer"> 详细描述

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class="cursor-pointer"> 文本