前端——JS 第17页

Result 和自定义异常在前后端交互中的作用

在前端和后端的交互中，Result的作用主要体现在以下几个方面：统一返回格式：通过Result类，后端可以将请求的结果统一封装成一个固定的格式返回给前端，这样前端可以更容易地解析和处理

Tdm_888·2024-09-07 06:33

Java12 Excel和Json文件解析

Excel文件解析：Excel文件解析(EasyExcel框架解析)Excel文件解析(ApachePOl框架解析)（1）Excel文件对象创建：POI《1》创建工作簿对象:XSSFWorkbookworkbook=newXSSFWorkbook（）；《2》创建工作表对象：XSSFSheetsheet=workbook.createSheet();《3》创建行对象：Rowrow=sheet.cre

Stringzhua·2024-09-07 06:01

华为OD机试C卷-- 计算三叉搜索树的高度（Java & JS & Python & C）

获取题库不需要订阅专栏，可直接私信我进入CSDN领军人物top1博主的华为OD交流圈观看完整题库、最新面试实况、考试报告等内容以及大佬一对一答疑。题目描述定义构造三叉搜索树规则如下：每个节点都存有一个数，当插入一个新的数时，从根节点向下寻找，直到找到一个合适的空节点插入。查找的规则是：1。如果数小于节点的数减去500，则将数插入节点的左子树2.如果数大于节点的数加上500，则将数插入节点的右子树3

飞码创造者·2024-09-07 06:29

计算三叉搜索树的高度【华为OD机试】(JAVA&Python&C++&JS题解)

一.题目-计算三叉搜索树的高度定义构造三叉搜索树规则如下：每个节点都存有一个数，当插入一个新的数时，从根节点向下寻找，直到找到一个合适的空节点插入。查找的规则是：1.如果数小于节点的数减去500，则将数插入节点的左子树2.如果数大于节点的数加上500，则将数插入节点的右子树3.否则，将数插入节点的中子树给你一系列数，请按以上规则，按顺序将数插入树中，构建出一棵三叉搜索树，最后输出树的高度。输入描述

我拥向宇宙吹来的风·2024-09-07 06:59

【jQuery】前端八股文面试题

jQuery这个问的没有那么多，暂时我被问到的就这几个。大家可以直接订阅专栏。文章目录jQuery1.jQuery常见的方法有哪几个？2.在jQuery中，常见使用委托的事件有哪些？1）点击事件（click）2）鼠标悬停事件（mouseenter和mouseleave）3）表单提交事件（submit）4）输入框变化事件（change）3.在jQuery中，常见的鼠标事件方法有哪些？1）click（

菜鸟una·2024-09-07 06:58

LAMT架构

滕佳不聪明·2024-09-07 05:25

生成一个完整的游戏商城代码是一个复杂的任务，因为它涉及到前端设计、后端逻辑、数据库管理、安全性等多个方面。不过，我可以为您提供一些用不同编程语言编写的代码片段作为起点或示例。

前端(HTML/CSS/JavaScript)meimiaomeimo.cn前端部分通常负责用户界面和交互。

PrimoRosal·2024-09-07 05:54

生成一个完整的游戏商城代码是一个相当复杂的任务，因为它涉及到前端界面、后端逻辑、数据库设计等多个方面。不过，我可以为您提供一个简单的示例，展示如何在不同编程语言中构建游戏商城的基本框架。

前端（HTML/CSS/JavaScript）cztaihubay.com.cn前端主要负责展示商城界面和处理用户交互。

HaydenDryden·2024-09-07 05:54

生成一个完整的App代码涉及到多个组件和不同的编程语言，这通常包括前端（用户界面）、后端（服务器逻辑和数据存储）以及可能的数据库。由于直接在回答中提供完整的应用代码是不现实的，我将为你概述一个简单Ap

假设的App:简单的待办事项列表tcjmbj.cn前端（移动应用）iOS(Swift/SwiftUI)swift//假设的ContentView.swiftimportSwiftUIstructContentView

EugeneBecher·2024-09-07 05:24

创建一个完整的游戏商城代码示例会相当复杂，因为它涉及到前端展示、后端逻辑处理、数据库交互等多个方面。不过，我可以为你提供一个简化的概念性示例，分别用几种流行的编程语言和技术栈来概述这个过程。

前端（HTML+CSS+JavaScript）gwygov.cnHTML(结构)html游戏商城欢迎来到游戏商城CSS(样式)cssbody{font-family:Arial,sans-serif;}

EugeneBecher·2024-09-07 05:24

由于一个完整的购物商城代码涉及多个方面（如前端、后端、数据库等），并且由于篇幅限制，这里我将给出各种语言中一些核心部分的简化示例。 1. HTML (前端) HTML 负责页面的结构。 html

由于一个完整的购物商城代码涉及多个方面（如前端、后端、数据库等），并且由于篇幅限制，这里我将给出各种语言中一些核心部分的简化示例。HTML(前端)HTML负责页面的结构。

代码小狂热者·2024-09-07 05:53

exceljs操作手册

ExcelJS读取，操作并写入电子表格数据和样式到XLSX和JSON文件。一个Excel电子表格文件逆向工程项目。安装npminstallexceljs新的功能!

Baiychenvip·2024-09-07 05:53

采用python打开json数据，再全部写入到MySQL中

其实有点呆，MySQL似乎是可以直接读取json数据类型的，MySQL精通建议直接划过。但是还是稍有一些可取之处的（起码对我来说是的）循环遍历一个文件夹中的多个文件读取相关数据。

echo751·2024-09-07 04:21

十七、新增、修改--功能优化总结

十四章介绍了新增功能，该功能可以进行优化，本节以角色(t_role)进行讲解，主要是在新增的时候先校验该角色的名称(name)是否已经存在JS代码如下：//新增角色$("#insertBtn").click

荒--·2024-09-07 04:19

java计算机毕业设计生产管理系统源代码+数据库+系统+lw文档

计算机毕业设计生产管理系统源代码+数据库+系统+lw文档java计算机毕业设计生产管理系统源代码+数据库+系统+lw文档本源码技术栈：项目架构：B/S架构开发语言：Java语言开发软件：ideaeclipse前端技术

影伴设计·2024-09-07 04:18

2. Fabric 简介

1.介绍Fabric.js—一个功能强大的Javascript库，使使用HTML5canvas的工作变得轻而易举。

Lanwarf-前端开发·2024-09-07 04:48

vue前端实现打印功能

方案一：window.print()这个命令默认打印整个页面的内容，所以，如果想要实现局部打印功能的话，就要重新给body赋值，并且后续执行完之后再还原回去，这样的话会造成一些非预期的结果，很麻烦，并且在当前也操作，window.document.body的内容重新渲染，打印完会有刷新，影响用户的体验，所以不推荐方案二：利用iframe，iframe.contentDocument.execCom

是小芳芳呀·2024-09-07 04:17

浅谈一下前后端分离（什么是前后端分离以及前后端分离的原理）

1前后端分离简单来说，就是一个前端，一个后端，前端主要负责就是页面部分，比如htmlcssvue等，而后端主要就是与数据库打交道，实现对数据库的增删改查，你也可以这样理解，后端就是从数据中取值生成一个数值传递给前端

java_upp·2024-09-07 04:46

第三章：发送AJAX请求的几种方式

复制script标签放到目标html文件head标签中添加跨源的属性的设置crossorigin="anonymous"1.2jQuery发送请求的四个参数：url参数（可以没有）函数响应体类型（一般为json

Muko_0x7d2·2024-09-07 04:44

计算机毕业设计springboot健身中心前台信息管理系统qotli源码+系统+程序+lw文档+部署

lw文档+部署计算机毕业设计springboot健身中心前台信息管理系统qotli源码+系统+程序+lw文档+部署本源码技术栈：项目架构：B/S架构开发语言：Java语言开发软件：ideaeclipse前端技术

呦呦网络·2024-09-07 03:11

基于JAVA家庭记账系统计算机毕业设计源码+系统+mysql数据库+lw文档+部署

mysql数据库+lw文档+部署基于JAVA家庭记账系统计算机毕业设计源码+系统+mysql数据库+lw文档+部署本源码技术栈：项目架构：B/S架构开发语言：Java语言开发软件：ideaeclipse前端技术

丽扬科技·2024-09-07 02:09

Java面试题

Java面试题文章目录1、抽象类和接口的区别2、重载和重写的区别3、==和equals的区别4、讲一讲什么是map、set、list5、HashMap原理6、什么是JSP？

路飞Fly了·2024-09-07 02:08

基于JAVA智能推荐二手车交易网站计算机毕业设计源码+系统+数据库+lw文档+部署

+系统+数据库+lw文档+部署基于JAVA智能推荐二手车交易网站计算机毕业设计源码+系统+数据库+lw文档+部署本源码技术栈：项目架构：B/S架构开发语言：Java语言开发软件：ideaeclipse前端技术

光光网络·2024-09-07 02:07

html如何嵌套页面？标签告诉你答案</h4> </div> <div class="article-excerpt"> web<em>前端</em>全栈资料粉丝福利（面试题、视频、资料笔记、进阶路线）在这里小编首先介绍的是HTML中iframe标签的用法：怎么在一个网页中嵌入另一个网页呢，我们可以用html中的iframe标签搞定 </div> </a> <div class="newsitem-meta"> <span class=" votes-operation"> <span class="wrap"> <i class="glyphicon glyphicon-thumbs-up hot"></i> </span> <span class="author pr20"> PHP9年架构师<span class="dot">·</span>2024-09-07 02:06 </span> </span> <ul class="taglist--inline inline-block articletitle--tag"> </ul> </div> </div> </div> <div class="news-item streamitem clearfix mt15"> <div class="newsitem-info clearfix"> <a href="/article/1832106466694230016.htm" ></a> <a target="_blank" href="/article/1832106466694230016.htm"> <div class="mb5 mt5"> <h4 class="newsitem-title mt0">h5 调用手机摄像头/相册</h4> </div> <div class="article-excerpt"> html部分<em>js</em>部分getBase64:function(file,callback){varmaxWidth=640if(file.files&&file.files[0]){varthisFile= </div> </a> <div class="newsitem-meta"> <span class=" votes-operation"> <span class="wrap"> <i class="glyphicon glyphicon-thumbs-up hot"></i> </span> <span class="author pr20"> 苦茶_12138<span class="dot">·</span>2024-09-07 01:55 </span> </span> <ul class="taglist--inline inline-block articletitle--tag"> </ul> </div> </div> </div> <div class="news-item streamitem clearfix mt15"> <div class="news__item-info clearfix"> <a href="/article/1832097811273969664.htm" ></a> <a target="_blank" href="/article/1832097811273969664.htm"> <div class="mb5 mt5"> <h4 class="newsitem-title mt0">JavaBean</h4> </div> <div class="article-excerpt"> JavaBean的使用场景：1）项目中用到的实体对象2）EL表达式中用到的访问对象的属性3）<em>js</em>p标签张的属性赋值<em>js</em>p中创建对象以及给对象属性赋值以及获取属性值的usebean也 </div> </a> <div class="newsitem-meta"> <span class=" votes-operation"> <span class="wrap"> <i class="glyphicon glyphicon-thumbs-up hot"></i> </span> <span class="author pr20"> 我是邱邱<span class="dot">·</span>2024-09-07 00:32 </span> </span> <ul class="taglist--inline inline-block articletitle--tag"> </ul> </div> </div> </div> <div class="news-item streamitem clearfix mt15"> <div class="news__item-info clearfix"> <a href="/article/1832089847431524352.htm" ></a> <a target="_blank" href="/article/1832089847431524352.htm"> <div class="mb5 mt5"> <h4 class="newsitem-title mt0">python pdf-pythonPDF书籍十三本</h4> </div> <div class="article-excerpt"> pythonPDF书籍十三本闯客网技术论坛部分Python资料合集，闯客网还有很多关于编程语言的学习资料和项目案例等免费下载，还有c++，c语言，java，Android和<em>前端</em>等等等的编程资料，应有尽有 </div> </a> <div class="newsitem-meta"> <span class=" votes-operation"> <span class="wrap"> <i class="glyphicon glyphicon-thumbs-up hot"></i> </span> <span class="author pr20"> weixin_37988176<span class="dot">·</span>2024-09-07 00:53 </span> </span> <ul class="taglist--inline inline-block articletitle--tag"> </ul> </div> </div> </div> <div class="news-item streamitem clearfix mt15"> <div class="news__item-info clearfix"> <a href="/article/1832087365871562752.htm" ></a> <a target="_blank" href="/article/1832087365871562752.htm"> <div class="mb5 mt5"> <h4 class="newsitem-title mt0">设置contenteditable的非表单元素限制字数时设置光标位置</h4> </div> <div class="article-excerpt"> html:请输入选项内容<em>js</em>:$("#optionA").on({input:function(e){limited(e.target.id,30);},click:function(e){write( </div> </a> <div class="newsitem-meta"> <span class=" votes-operation"> <span class="wrap"> <i class="glyphicon glyphicon-thumbs-up hot"></i> </span> <span class="author pr20"> Jerry379<span class="dot">·</span>2024-09-07 00:01 </span> </span> <ul class="taglist--inline inline-block articletitle--tag"> </ul> </div> </div> </div> <div class="news-item streamitem clearfix mt15"> <div class="news__item-info clearfix"> <a href="/article/1832076363109068800.htm" ></a> <a target="_blank" href="/article/1832076363109068800.htm"> <div class="mb5 mt5"> <h4 class="newsitem-title mt0">最长回文子序列<em>js</em></h4> </div> <div class="article-excerpt"> 题目：给你一个字符串s，找出其中最长的回文子序列，并返回该序列的长度。子序列定义为：不改变剩余字符顺序的情况下，删除某些字符或者不删除任何字符形成的一个序列。示例1：输入：s="bbbab"输出：4解释：一个可能的最长回文子序列为"bbbb"。示例2：输入：s="cbbd"输出：2解释：一个可能的最长回文子序列为"bb"。提示：1<=s.length<=1000s仅由小写英文字母组成解题思路：对于 </div> </a> <div class="newsitem-meta"> <span class=" votes-operation"> <span class="wrap"> <i class="glyphicon glyphicon-thumbs-up hot"></i> </span> <span class="author pr20"> G1useppE<span class="dot">·</span>2024-09-06 23:18 </span> </span> <ul class="taglist--inline inline-block articletitle--tag"> <li class="tagPopup mb5"> <a class="tag" href="/search/%E7%AE%97%E6%B3%95/1.htm"> 算法 </a> </li> <li class="tagPopup mb5"> <a class="tag" href="/search/%E7%AE%97%E6%B3%95/1.htm"> 算法 </a> </li> <li class="tagPopup mb5"> <a class="tag" href="/search/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/1.htm"> 动态规划 </a> </li> <li class="tagPopup mb5"> <a class="tag" href="/search/javascript/1.htm"> javascript </a> </li> <li class="tagPopup mb5"> <a class="tag" href="/search/leetcode/1.htm"> leetcode </a> </li> </ul> </div> </div> </div> <div class="news-item streamitem clearfix mt15"> <div class="news__item-info clearfix"> <a href="/article/1832076110892986368.htm" ></a> <a target="_blank" href="/article/1832076110892986368.htm"> <div class="mb5 mt5"> <h4 class="newsitem-title mt0">【Leetcode 2418 】按身高排序 —— <em>JS</em>的操作</h4> </div> <div class="article-excerpt"> 给你一个字符串数组names，和一个由互不相同的正整数组成的数组heights。两个数组的长度均为n。对于每个下标i，names[i]和heights[i]表示第i个人的名字和身高。请按身高降序顺序返回对应的名字数组names。示例1：输入：names=["Mary","John","Emma"],heights=[180,165,170]输出：["Mary","Emma","John"]解释：M </div> </a> <div class="newsitem-meta"> <span class=" votes-operation"> <span class="wrap"> <i class="glyphicon glyphicon-thumbs-up hot"></i> </span> <span class="author pr20"> 自学前端_又又<span class="dot">·</span>2024-09-06 23:18 </span> </span> <ul class="taglist--inline inline-block articletitle--tag"> <li class="tagPopup mb5"> <a class="tag" href="/search/%E5%89%8D%E7%AB%AF%E5%88%B7leetCode/1.htm"> 前端刷leetCode </a> </li> <li 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对象解构：基本；有剩余值运算符...rest；有默认值；解析对象不分顺序（变量名要和键名一致）；解构对象.png【对象】1.对象的简写（变量名和对象的键一致的时候才可以）；2.对象属性表达式[]；3.对象的拷贝合并Object.assign()；4.对象扩展...{...a,...b}复制与合并对象；【对象数据类型的弱点】1.对象的键名只能是字符串或者symbol；2.对象没有顺序；3.对象的长度 </div> </a> <div class="newsitem-meta"> <span class=" votes-operation"> <span class="wrap"> <i class="glyphicon glyphicon-thumbs-up hot"></i> </span> <span class="author pr20"> 含含要暴怒<span class="dot">·</span>2024-09-06 22:17 </span> </span> <ul class="taglist--inline inline-block articletitle--tag"> </ul> </div> </div> </div> <div class="news-item streamitem clearfix mt15"> <div class="news__item-info clearfix"> <a href="/article/1832064646488616960.htm" ></a> <a target="_blank" href="/article/1832064646488616960.htm"> <div class="mb5 mt5"> <h4 class="newsitem-title mt0">使用CSS、JavaScript、jQuery三种方式实现手风琴效果</h4> </div> <div class="article-excerpt"> 我试着用css、<em>js</em>、jQuery三种方式实现了这种效果，最终效果差不多，美中不足的是，css方式当鼠标离开后，会恢复到初始状态，也就是显示第一张大图片的状态。 </div> </a> <div class="newsitem-meta"> <span class=" 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