<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qq_45302640的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qq_45302640</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_45302640]]></copyright><item><title><![CDATA[运行前端项目步骤]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/162738291</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/162738291</guid><author>qq_45302640</author><pubDate>Thu, 09 Jul 2026 20:22:42 +0800</pubDate><description><![CDATA[文件夹里能看到 package.json 文件就是根目录。官网下载：https://nodejs.org/3.安装项目依赖（首次拉代码必做）1.安装 Node.js（必须）2.打开终端 cd 到项目文件夹。浏览器直接打开即可预览页面。能输出版本号即安装成功。启动成功后终端会打印地址。如果项目用 yarn。4.启动本地开发服务。]]></description><category></category></item><item><title><![CDATA[史上最简单的Seurat安装教程（搞生信的真的不是疯子吗？）]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/156400440</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/156400440</guid><author>qq_45302640</author><pubDate>Mon, 29 Dec 2025 23:51:17 +0800</pubDate><description><![CDATA[R环境是世界上最恶心的环境。搞了几天几夜终于找到了正途。下载R包真的是环环相扣。]]></description><category></category></item><item><title><![CDATA[POI处理EXCEL]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/147754229</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/147754229</guid><author>qq_45302640</author><pubDate>Wed, 07 May 2025 13:49:10 +0800</pubDate><description><![CDATA[ClassLoader 提供了 getResourceAsStream() 方法，用于将类路径中的资源作为输入流打开。返回 ServletOutputStream 对象，用于向客户端发送二进制数据（如文件、图片、PDF 等）。// 相对路径（相对于当前类的包）各种业务系统导出Excel报表。开头，相对于类路径根目录）银行网银系统导出交易明细。]]></description><category></category></item><item><title><![CDATA[leetcode 跳跃游戏Ⅱ]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/143246351</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/143246351</guid><author>qq_45302640</author><pubDate>Sat, 26 Oct 2024 00:09:39 +0800</pubDate><description><![CDATA[睡前最后一道题，虽然完全靠自己，但是感觉自己的弱点是思考和敲的速度都贼慢了…]]></description><category></category></item><item><title><![CDATA[字节青训营题解（Java版）]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/143236263</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/143236263</guid><author>qq_45302640</author><pubDate>Fri, 25 Oct 2024 16:00:13 +0800</pubDate><description><![CDATA[【代码】字节青训营题解（Java版）]]></description><category></category></item><item><title><![CDATA[Spring Cache]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/143176556</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/143176556</guid><author>qq_45302640</author><pubDate>Wed, 23 Oct 2024 13:05:20 +0800</pubDate><description><![CDATA[要使用哪一个缓存就导入哪个缓存的坐标，不用在配置里写。]]></description><category></category></item><item><title><![CDATA[微信小程序]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/143168627</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/143168627</guid><author>qq_45302640</author><pubDate>Tue, 22 Oct 2024 21:18:10 +0800</pubDate><description><![CDATA[调用wx.login获得授权码code（一个授权码只能使用一次，使用后失效）用授权码请求服务器获得openid（微信用户唯一标识）]]></description><category></category></item><item><title><![CDATA[Bean命名冲突]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/143105767</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/143105767</guid><author>qq_45302640</author><pubDate>Mon, 21 Oct 2024 10:25:44 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[HttpClient]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/143096290</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/143096290</guid><author>qq_45302640</author><pubDate>Sun, 20 Oct 2024 19:02:24 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[Redis-3]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/143079986</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/143079986</guid><author>qq_45302640</author><pubDate>Sun, 20 Oct 2024 00:17:37 +0800</pubDate><description><![CDATA[database配置不是必须，默认是0号数据库。]]></description><category></category></item><item><title><![CDATA[Redis-2]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/143027062</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/143027062</guid><author>qq_45302640</author><pubDate>Fri, 18 Oct 2024 00:30:35 +0800</pubDate><description><![CDATA[有序集合sorted set / zset。]]></description><category></category></item><item><title><![CDATA[Redis-1]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/143021881</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/143021881</guid><author>qq_45302640</author><pubDate>Thu, 17 Oct 2024 17:00:59 +0800</pubDate><description><![CDATA[Redis的Windows版属于绿色软件，直接解压即可使用。Redis是一个基于内存的key-value结构数据库。适合存储热点数据（热点商品，咨讯，新闻）连接的时候输入-a 在输入密码。在解压后的文件路径输入cmd。基于内存存储，读写性能高。设置密码：打开配置文件。打开一个新的命令窗口。默认情况下不需要密码。]]></description><category></category></item><item><title><![CDATA[苍穹外卖--分页查询]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/142834709</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/142834709</guid><author>qq_45302640</author><pubDate>Fri, 11 Oct 2024 00:25:53 +0800</pubDate><description><![CDATA[方式二：在WebMvcConfiguration中扩展Spring MVC的消息转换器，统一对日期类型进行格式化处理。利用pagehelper动态拼接limit语句。方式一：在属性上加入注解，对日期进行格式化。底层利用localthread来传递数据。不用在mapper中写limit。重点代码：service层。pagehelper插件。]]></description><category></category></item><item><title><![CDATA[苍穹外卖P20--ThreadLocal]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/142832804</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/142832804</guid><author>qq_45302640</author><pubDate>Thu, 10 Oct 2024 21:46:35 +0800</pubDate><description><![CDATA[ThreadLocal为每个线程提供单独一份存储空间，具有线程隔离的效果，只有在线程内才能获取到对应的值，线程外则不能访问。public void set(T value) 设置当前线程的线程局部变量的值。public void remove() 移除当前线程的线程局部变量。客户端发起的每一次请求，tomcat服务器都会分配一个单独的线程。public T get() 返回当前线程所对应的线程局部变量的值。一般将ThreadLocal封装成工具类来使用。可以将需要的数据进行存储，在相应的位置再取出。]]></description><category></category></item><item><title><![CDATA[苍穹外卖P19--异常处理]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/142831988</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/142831988</guid><author>qq_45302640</author><pubDate>Thu, 10 Oct 2024 21:16:00 +0800</pubDate><description><![CDATA[以上传数据库数据重复为例，进行异常处理。]]></description><category></category></item><item><title><![CDATA[Spring Framework P4]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/141677965</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/141677965</guid><author>qq_45302640</author><pubDate>Thu, 29 Aug 2024 14:29:01 +0800</pubDate><description><![CDATA[Spring Framework 是Spring生态圈中最基础的项目，是其他项目的根基。]]></description><category></category></item><item><title><![CDATA[win11找环境变量]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/141649121</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/141649121</guid><author>qq_45302640</author><pubDate>Wed, 28 Aug 2024 20:27:25 +0800</pubDate><description><![CDATA[第一步：win＋i第二步：第三步：第四步：]]></description><category></category></item><item><title><![CDATA[苍穹外卖day2--员工管理、分类管理]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/138414787</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/138414787</guid><author>qq_45302640</author><pubDate>Sat, 04 May 2024 01:27:50 +0800</pubDate><description><![CDATA[注意：当前端提交的数据和实体类中对应的属性差别比较大时，建议使用DTO来封装数据。]]></description><category></category></item><item><title><![CDATA[苍穹外卖day1--开发环境搭建]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/137722726</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/137722726</guid><author>qq_45302640</author><pubDate>Sat, 20 Apr 2024 22:25:02 +0800</pubDate><description><![CDATA[启动nginx：双击nginx.exe即可启动nginx服务，访问端口号为80。后端工程基于maven进行项目构建，并且进行分模块开发。前端：管理端（Web） 用户端（小程序）后端环境搭建 - 使用Git进行版本控制。通过数据库建表语句创建数据库表结构。将本地文件推送到Git远程仓库。后端：后端服务（Java）前端工程基于ngnix运行。记得改成自己设置的账号密码。先启动mysql服务。]]></description><category></category></item><item><title><![CDATA[Maven高级]]></title><link>https://blog.youkuaiyun.com/qq_45302640/article/details/136803211</link><guid>https://blog.youkuaiyun.com/qq_45302640/article/details/136803211</guid><author>qq_45302640</author><pubDate>Mon, 18 Mar 2024 18:51:30 +0800</pubDate><description><![CDATA[将项目按照功能拆分成若干个子模块，方便项目的管理维护、扩展，也方便模块间的相互调用，资源共享。分模块开发需要先针对模块功能进行设计，再进行编码。不会先将工程开发完毕，然后进行拆分。]]></description><category></category></item></channel></rss>