IT修真院·坑乎 | Java(后端),CSS(前端),JavaScript(前端),PM(产品经理),UI(交互设计),QA(测试),Android(安卓APP),iOS(苹果APP),OP(运维),Python(后端)日常在线问答学习平台

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关于前台传来的VO对象，和我们给前台发送的对象，有没有什么最佳实践

0

1

接口文档

class="cursor-pointer"> 详细描述

该问题已被官方收录

创建数据表和导入数据时总是出现上图红圈记号所示的错误，但不影响运行结果

0

1

数据库

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

maven跑测试单元乱码，改回正常，直接测试又显示乱码

0

1

数据库

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

缓存

1

缓存相关

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

关于jsp页面的问题，无法找到属性

0

1

JSP

class="cursor-pointer"> 详细描述

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<div id="myCarousel" class="carousel slide">
    <ol class="carousel-indicators">
        <li class="active" data-slide-to="0" data-target="#myCarousel"></li>
        <li data-slide-to="1" data-target="#myCarousel"></li>
        <li data-slide-to="2" data-target="#myCarousel"></li>
        <li data-slide-to="3" data-target="#myCarousel"></li>
    </ol>
    <div class="carousel-inner">
        <div class="item active">
            <img alt="First slide" src="${pageContext.request.contextPath}/data/imges/547567.jpg">
        </div>
        <div class="item">
            <img alt="Second slide" src="${pageContext.request.contextPath }/data/imges/547567.jpg">
        </div>
        <div class="item">
            <img alt="Third slide" src="${pageContext.request.contextPath }/data/imges/547567.jpg">
        </div>
        <div class="item">
            <img alt="Third slide" src="${pageContext.request.contextPath }/data/imges/547567.jpg">
        </div>
        <a data-slide="prev" href="#myCarousel" class="carousel-control left">
            <i class="icon-left"><img src="${pageContext.request.contextPath }/data/imges/54354.png"></i>
        </a>
        <a data-slide="next" href="#myCarousel" class="carousel-control right">
            <i class="icon-right"><img src="${pageContext.request.contextPath }/data/imges/4525424.png"></i>
        </a>
    </div>
</div>

<div class="main container">
    
    <div class="main-a row">
        <div class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
            <div class="row text-center">
                <ul class="list-unstyled">
                    <li class="col-xs-12 up-1">
                        <img alt="" src="${pageContext.request.contextPath }/data/imges/45354312.png">
                    </li>
                    <li class="up-2 col-xs-12">高效</li>
                    <li class="up-3 col-xs-12">将三到七年的成长时间,缩短到一年到两年</li>
                </ul>
            </div>
        </div>

<div class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
            <div class="row text-center">
                <ul class="list-unstyled">
                    <li class="col-xs-12 up-1">
                        <img alt="" src="${pageContext.request.contextPath }/data/imges/879789.png">
                    </li>
                    <li class="up-2 col-xs-12">规范</li>
                    <li class="up-3 col-xs-12">标准到实战教程,不会走弯路</li>
                </ul>
            </div>
        </div>

<div class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
            <div class="row text-center">
                <ul class="list-unstyled">
                    <li class="col-xs-12 up-1">
                        <img alt="" src="${pageContext.request.contextPath }/data/imges/786453654365.png">
                    </li>
                    <li class="up-2 col-xs-12">人脉</li>
                    <li class="up-3 col-xs-12">同班好友,同院学长,技术大师,入学就混职脉圈,为以后铺平道路</li>
                </ul>
            </div>
        </div>

<div class="col-xs-12 col-sm-6 col-md-6 col-lg-3 text-center">
            <p>
                <img src="${pageContext.request.contextPath }/data/imges/453254312.png">${items1}<br>
                <span class="up-3">累计在线学习人数</span>
            </p>
            <p>
                <img src="${pageContext.request.contextPath }/data/imges/453254312.png">${items}<br>
                <span class="up-3">学员已经找到满意工作</span>
            </p>
        </div>
    </div>

<div class="main-b row">
        <h3 class="text-center main-tab">如何学习</h3>
        <ul class="list-unstyled text-center">
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">1</span>
                <p class="up-2">匹配你现在的个人情况寻找适合自己的岗位</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">2</span>
                <p class="up-2">了解职业前景薪金待遇，竞争压力等</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">3</span>
                <p class="up-2">掌握行业内顶级技能</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">4</span>
                <p class="up-2">查看职业目标任务</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">5</span>
                <p class="up-2">参考学习资料，掌握技能点，逐个完成任务</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">6</span>
                <p class="up-2">加入班级，和小伙伴们互帮互动，一块学习</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">7</span>
                <p class="up-2">选择导师，一路引导，加速自己成长</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">8</span>
                <p class="up-2">完成职业 技能，升级业界大牛</p>
                <span class="up-3 invisible"></span>
            </li>
        </ul>
    </div>

<div class="main-c row">
        <h3 class="text-center main-tab">优秀学员展示</h3>
        <ul class="list-unstyled text-center">
            <c:forEach items=" ${items2}" var="items">
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
            <div>
                <img src="${pageContext.request.contextPath }/data/imges/242424.png">
                <span>技术顾问:${items.name}</span>
                <p class="text-left">${items.position}：${items.introduce}</p>
            </div>
        </li>
            <%--<li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <div>
                    <img src="${pageContext.request.contextPath }/data/imges/242424.png">
                    <span>技术顾问:罗大佑</span>
                    <p class="text-left">百度技术总监：互联网基础服务领域，从事虚拟主机，云主机，域名。
                        曾任新网高级技术经理，负责技术研发，团队管理与建设。</p>
                </div>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <div>
                    <img src="${pageContext.request.contextPath }/data/imges/242424.png">
                    <span>技术顾问:罗大佑</span>
                    <p class="text-left">百度技术总监：互联网基础服务领域，从事虚拟主机，云主机，域名。
                        曾任新网高级技术经理，负责技术研发，团队管理与建设。</p>
                </div>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <div>
                    <img src="${pageContext.request.contextPath }/data/imges/242424.png">
                    <span>技术顾问:罗大佑</span>
                    <p class="text-left">百度技术总监：互联网基础服务领域，从事虚拟主机，云主机，域名。
                        曾任新网高级技术经理，负责技术研发，团队管理与建设。</p>
                </div>
            </li>--%>
            </c:forEach>
        </ul>
    </div>

<div class="row main-bottom">
        <h3 class="text-center">战略合作企业</h3>
        <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
            <ul class="logo">
                <li>
                    <a href=""><img src="${pageContext.request.contextPath }/data/imges/123132.png"></a>
                </li>
                <li>
                    <a href=""> <img src="${pageContext.request.contextPath }/data/imges/1549865.png"></a>
                </li>
                <li>
                    <a href=""> <img src="${pageContext.request.contextPath }/data/imges/785345.png"></a>
                </li>
                <li>
                    <a href=""> <img src="${pageContext.request.contextPath }/data/imges/1471.png"></a>
                </li>
                <li>
                    <a href="">  <img src="${pageContext.request.contextPath }/data/imges/7861.png"></a>
                </li>
            </ul>
        </div>
    </div>
</div>

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<div id="myCarousel" class="carousel slide">
    <ol class="carousel-indicators">
        <li class="active" data-slide-to="0" data-target="#myCarousel"></li>
        <li data-slide-to="1" data-target="#myCarousel"></li>
        <li data-slide-to="2" data-target="#myCarousel"></li>
        <li data-slide-to="3" data-target="#myCarousel"></li>
    </ol>
    <div class="carousel-inner">
        <div class="item active">
            <img alt="First slide" src="${pageContext.request.contextPath}/data/imges/547567.jpg">
        </div>
        <div class="item">
            <img alt="Second slide" src="${pageContext.request.contextPath }/data/imges/547567.jpg">
        </div>
        <div class="item">
            <img alt="Third slide" src="${pageContext.request.contextPath }/data/imges/547567.jpg">
        </div>
        <div class="item">
            <img alt="Third slide" src="${pageContext.request.contextPath }/data/imges/547567.jpg">
        </div>
        <a data-slide="prev" href="#myCarousel" class="carousel-control left">
            <i class="icon-left"><img src="${pageContext.request.contextPath }/data/imges/54354.png"></i>
        </a>
        <a data-slide="next" href="#myCarousel" class="carousel-control right">
            <i class="icon-right"><img src="${pageContext.request.contextPath }/data/imges/4525424.png"></i>
        </a>
    </div>
</div>


<div class="main container">
    <!--第一部分开始-->
    <div class="main-a row">
        <div class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
            <div class="row text-center">
                <ul class="list-unstyled">
                    <li class="col-xs-12 up-1">
                        <img alt="" src="${pageContext.request.contextPath }/data/imges/45354312.png">
                    </li>
                    <li class="up-2 col-xs-12">高效</li>
                    <li class="up-3 col-xs-12">将三到七年的成长时间,缩短到一年到两年</li>
                </ul>
            </div>
        </div>

        <div class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
            <div class="row text-center">
                <ul class="list-unstyled">
                    <li class="col-xs-12 up-1">
                        <img alt="" src="${pageContext.request.contextPath }/data/imges/879789.png">
                    </li>
                    <li class="up-2 col-xs-12">规范</li>
                    <li class="up-3 col-xs-12">标准到实战教程,不会走弯路</li>
                </ul>
            </div>
        </div>

        <div class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
            <div class="row text-center">
                <ul class="list-unstyled">
                    <li class="col-xs-12 up-1">
                        <img alt="" src="${pageContext.request.contextPath }/data/imges/786453654365.png">
                    </li>
                    <li class="up-2 col-xs-12">人脉</li>
                    <li class="up-3 col-xs-12">同班好友,同院学长,技术大师,入学就混职脉圈,为以后铺平道路</li>
                </ul>
            </div>
        </div>

        <div class="col-xs-12 col-sm-6 col-md-6 col-lg-3 text-center">
            <p>
                <img src="${pageContext.request.contextPath }/data/imges/453254312.png">${items1}<br>
                <span class="up-3">累计在线学习人数</span>
            </p>
            <p>
                <img src="${pageContext.request.contextPath }/data/imges/453254312.png">${items}<br>
                <span class="up-3">学员已经找到满意工作</span>
            </p>
        </div>
    </div>

    <!--第二部分开始-->
    <div class="main-b row">
        <h3 class="text-center main-tab">如何学习</h3>
        <ul class="list-unstyled text-center">
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">1</span>
                <p class="up-2">匹配你现在的个人情况寻找适合自己的岗位</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">2</span>
                <p class="up-2">了解职业前景薪金待遇，竞争压力等</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">3</span>
                <p class="up-2">掌握行业内顶级技能</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">4</span>
                <p class="up-2">查看职业目标任务</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">5</span>
                <p class="up-2">参考学习资料，掌握技能点，逐个完成任务</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">6</span>
                <p class="up-2">加入班级，和小伙伴们互帮互动，一块学习</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">7</span>
                <p class="up-2">选择导师，一路引导，加速自己成长</p>
                <span class="up-3"></span>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <span class="up-1 text-center">8</span>
                <p class="up-2">完成职业 技能，升级业界大牛</p>
                <span class="up-3 invisible"></span>
            </li>
        </ul>
    </div>

    <!--第三部分开始-->
    <div class="main-c row">
        <h3 class="text-center main-tab">优秀学员展示</h3>
        <ul class="list-unstyled text-center">
            <c:forEach items=" ${items2}" var="items">
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
            <div>
                <img src="${pageContext.request.contextPath }/data/imges/242424.png">
                <span>技术顾问:${items.name}</span>
                <p class="text-left">${items.position}：${items.introduce}</p>
            </div>
        </li>
            <%--<li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <div>
                    <img src="${pageContext.request.contextPath }/data/imges/242424.png">
                    <span>技术顾问:罗大佑</span>
                    <p class="text-left">百度技术总监：互联网基础服务领域，从事虚拟主机，云主机，域名。
                        曾任新网高级技术经理，负责技术研发，团队管理与建设。</p>
                </div>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <div>
                    <img src="${pageContext.request.contextPath }/data/imges/242424.png">
                    <span>技术顾问:罗大佑</span>
                    <p class="text-left">百度技术总监：互联网基础服务领域，从事虚拟主机，云主机，域名。
                        曾任新网高级技术经理，负责技术研发，团队管理与建设。</p>
                </div>
            </li>
            <li class="col-xs-12 col-sm-6 col-md-6 col-lg-3">
                <div>
                    <img src="${pageContext.request.contextPath }/data/imges/242424.png">
                    <span>技术顾问:罗大佑</span>
                    <p class="text-left">百度技术总监：互联网基础服务领域，从事虚拟主机，云主机，域名。
                        曾任新网高级技术经理，负责技术研发，团队管理与建设。</p>
                </div>
            </li>--%>
            </c:forEach>
        </ul>
    </div>

    <!--第四部分开始-->
    <div class="row main-bottom">
        <h3 class="text-center">战略合作企业</h3>
        <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
            <ul class="logo">
                <li>
                    <a href=""><img src="${pageContext.request.contextPath }/data/imges/123132.png"></a>
                </li>
                <li>
                    <a href=""> <img src="${pageContext.request.contextPath }/data/imges/1549865.png"></a>
                </li>
                <li>
                    <a href=""> <img src="${pageContext.request.contextPath }/data/imges/785345.png"></a>
                </li>
                <li>
                    <a href=""> <img src="${pageContext.request.contextPath }/data/imges/1471.png"></a>
                </li>
                <li>
                    <a href="">  <img src="${pageContext.request.contextPath }/data/imges/7861.png"></a>
                </li>
            </ul>
        </div>
    </div>
</div>

<div class="main-e">
    <h3 class="text-center main-tab ">友情链接</h3>
    <div class="container">
        <ul class="text-justify">
            <li><a href="#">手机软件</a></li>
            <li><a href="#">教师招聘</a></li>
            <li><a href="#">找工作</a></li>
            <li><a href="#">教师招聘</a></li>
            <li><a href="#">找工作</a></li>
            <li><a href="#">手机软件</a></li>
            <li><a href="#">教师招聘</a></li>
            <li><a href="#">手机软件</a></li>
            <li><a href="#">手机软件</a></li>
            <li><a href="#">找工作</a></li>
            <li><a href="#">手机软件</a></li>
            <li><a href="#">教师招聘</a></li>
            <li><a href="#">找工作</a></li>
            <li><a href="#">教师招聘</a></li>
            <li><a href="#">找工作</a></li>
            <li><a href="#">手机软件</a></li>
            <li><a href="#">教师招聘</a></li>
            <li><a href="#">手机软件</a></li>
            <li><a href="#">手机软件</a></li>
            <li><a href="#">找工作</a></li>
        </ul>
    </div>
</div>

该问题已被官方收录

pom中引入的插件无法使用

0

1

maven

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

nginx安装的时候进行make install 时报错

0

1

Nginx

class="cursor-pointer"> 详细描述

该问题已被官方收录

关于在servlet中创建了cookie，但在jsp中无法读取到该cookie的

0

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

//servlet中的代码
Cookie c=new Cookie(“userlogin”, ul.toString());
c.setMaxAge(60);
c.setPath(“/”);//此处添加了一句
response.addCookie(c);
response.sendRedirect(“../shopPage.jsp”);//此处改为重定向方式跳转至shopPage.jsp页面

//jsp中的代码
if(cookies!=null&& cookies.length>0){
for(Cookie c:cookies){
if(c.getName().equals(“userlogin”)){
userlogin=c.getValue();
String[] uLogin=userlogin.split(“,”);
username=uLogin[0];
password=uLogin[1];
}

该问题已被官方收录

shell脚本里想用正则表达式提取关键词不成功

0

1

linux命令

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

#!/bin/bash
dailyPath=/root/data/HYH-home/allDEBUG.log
dailyDB=/root/data/HYH-home/dailyDB.txt
dailyController=/root/data/HYH-home/dailyController.txt
#echo"">${dailyDB}
#echo"">${dailyController}
#cat ${dailyPath} | sed -rn'/database listTime/p'>${dailyDB}
#cat ${dailyPath} | sed -rn'/method getStudentTime/p'>${dailyController}
case $1 in
database)
echo"统计访问DB的时间范围分布"
#统计0-20ms
cat ${dailyPath} | awk 'BEGIN { sum=0; } {if($7>=0 && $7<20) sum++;} END{print"访问DB时间在(0-20ms)之间
的次数：",sum}'

该问题已被官方收录

压测完毕之后访问页面出现这个提示

0

1

压测

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图