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<!DOCTYPE html> < html lang = "zh-CN" data-theme = "light" > < head > < meta charset = "UTF-8" > < meta http-equiv = "X-UA-Compatible" content = "IE=edge" > < meta name = "viewport" content = "width=device-width, initial-scale=1.0,viewport-fit=cover" > < title > 常见问题和细节知识 | The Blog< / title > < meta name = "author" content = "Jason" > < meta name = "copyright" content = "Jason" > < meta name = "format-detection" content = "telephone=no" > < meta name = "theme-color" content = "#ffffff" > < meta name = "description" content = "一.常见问题1.前后端时间格式的问题配置文件中设置时间的格式和时区 2.MyBatis分页插件统计总记录数total失效的问题检查一下分页插件的配置 选择以下正确的分页插件配置 1234567891011121314151617181920212223242526272829303132package com.atguigu.common.config.mp;import com.baomid" >
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< meta property = "og:type" content = "article" >
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< meta property = "og:title" content = "常见问题和细节知识" >
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< meta property = "og:url" content = "https://qingling.icu/posts/14438.html" >
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< meta property = "og:site_name" content = "The Blog" >
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< meta property = "og:description" content = "一.常见问题1.前后端时间格式的问题配置文件中设置时间的格式和时区 2.MyBatis分页插件统计总记录数total失效的问题检查一下分页插件的配置 选择以下正确的分页插件配置 1234567891011121314151617181920212223242526272829303132package com.atguigu.common.config.mp;import com.baomid" >
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< meta property = "article:published_time" content = "2023-05-06T04:54:37.000Z" >
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< meta property = "article:modified_time" content = "2024-04-02T02:54:28.390Z" >
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< meta property = "article:author" content = "Jason" >
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})(window)< / script > < script src = "https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js" > < / script > < script type = "text/javascript" src = "/js/welcome.js" > < / script > < script src = "/js/sweetalert.js" > < / script > < link rel = "stylesheet" href = "/css/sweetalert.css" > <!-- hexo injector head_end start --> < link rel = "stylesheet" href = "https://npm.elemecdn.com/hexo-butterfly-swiper/lib/swiper.min.css" media = "print" onload = "this.media='all'" > < link rel = "stylesheet" href = "https://npm.elemecdn.com/hexo-butterfly-swiper/lib/swiperstyle.css" media = "print" onload = "this.media='all'" > <!-- hexo injector head_end end --> < meta name = "generator" content = "Hexo 6.3.0" > < / head > < body > < div id = "sidebar" > < div id = "menu-mask" > < / div > < div id = "sidebar-menus" > < div class = "avatar-img is-center" > < img src = "/img/avatar.jpg" onerror = "onerror=null;src='/img/loading.gif'" alt = "avatar" / > < / div > < div class = "sidebar-site-data site-data is-center" > < a href = "/archives/" > < div class = "headline" > 文章< / div > < div class = "length-num" > 60< / div > < / a > < a href = "/tags/" > < div class = "headline" > 标签< / div > < div class = "length-num" > 39< / div > < / a > < a href = "/categories/" > < div class = "headline" > 分类< / div > < div class = "length-num" > 10< / div > < / a > < / div > < br / > < div class = "menus_items" > < div class = "menus_item" > < a class = "site-page" target = "_blank" rel = "noopener" href = "https://www.tutorialspoint.com/compile_java8_online.php" > < i class = "fa-fw fas fa-code" > < / i > < span > 代码< / span > < / a > < / div > < div class = "menus_item" > < a class = "site-page" href = "/notice/" > < i class = "fa-fw fas fa-stream" > < / i > < span > 公告< / span > < / a > < / div > < div class = "menus_item" > < a class = "site-page" href = "/website/" > < i class = "fa-fw fas fa-list" > < / i > < span > 网址< / span > < / a > < / div > < div class = "menus_item" > < a class = "site-page" href = "/" > < i class = "fa-fw fas fa-home" > < / i > < span > 主页< / span > < / a > < / div > < / div > < / div > < / div > < div class = "post" id = "body-wrap" > < header class = "not-top-img" id = "page-header" > < nav id = "nav" > < span id = "blog-info" > < a href = "/" title = "The Blog" > < img class = "site-icon" src = "/img/logo.png" / > < span class = "site-name" > The Blog< / span > < / a > < / span > < div id = "menus" > < div id = "search-button" > < a class = "site-page social-icon search" href = "javascript:void(0);" > < i class = "fas fa-search fa-fw" > < / i > < span > 搜索< / span > < / a > < / div > < div class = "menus_items" > < div class = "menus_item" > < a class = "site-page" target = "_blank" rel = "noopener" href = "https://www.tutorialspoint.com/compile_java8_online.php" > < i class = "fa-fw fas fa-code" > < / i > < span > 代码< / span > < / a > < / div > < div class = "menus_item" > < a class = "site-page" href = "/notice/" > < i class = "fa-fw fas fa-stream" > < / i > < span > 公告< / span > < / a > < / div > < div class = "menus_item" > < a class = "site-page" href = "/website/" > < i class = "fa-fw fas fa-list" > < / i > < span > 网址< / span > < / a > < / div > < div class = "menus_item" > < a class = "site-page" href = "/" > < i class = "fa-fw fas fa-home" > < / i > < span > 主页< / span > < / a > < / div > < / div > < div id = "toggle-menu" > < a class = "site-page" href = "javascript:void(0);" > < i class = "fas fa-bars fa-fw" > < / i > < / a > < / div > < / div > < / nav > < / header > < main class = "layout" id = "content-inner" > < div id = "post" > < div id = "post-info" > < h1 class = "post-title" > 常见问题和细节知识< / h1 > < div id = "post-meta" > < div class = "meta-firstline" > < span class = "post-meta-date" > < i class = "far fa-calendar-alt fa-fw post-meta-icon" > < / i > < span class = "post-meta-label" > 发表于< / span > < time class = "post-meta-date-created" datetime = "2023-05-06T04:54:37.000Z" title = "发表于 2023-05-06 12:54:37" > 2023-05-06< / time > < span class = "post-meta-separator" > |< / span > < i class = "fas fa-history fa-fw post-meta-icon" > < / i > < span class = "post-meta-label" > 更新于< / span > < time class = "post-meta-date-updated" datetime = "2024-04-02T02:54:28.390Z" title = "更新于 2024-04-02 10:54:28" > 2024-04-02< / time > < / span > < span class = "post-meta-categories" > < span class = "post-meta-separator" > |< / span > < i class = "fas fa-inbox fa-fw post-meta-icon" > < / i > < a class = "post-meta-categories" href = "/categories/%E5%90%8E%E7%AB%AF/" > 后端< / a > < / span > < / div > < div class = "meta-secondline" > < span class = "post-meta-separator" > |< / span > < span class = "post-meta-wordcount" > < i class = "far fa-file-word fa-fw post-meta-icon" > < / i > < span class = "post-meta-label" > 字数总计:< / span > < span class = "wo
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< p > < img src = "/pictures/image-20230506130238222.png" alt = "image-20230506130238222" > < / p >
< h2 id = "2-MyBatis分页插件统计总记录数total失效的问题" > < a href = "#2-MyBatis分页插件统计总记录数total失效的问题" class = "headerlink" title = "2.MyBatis分页插件统计总记录数total失效的问题" > < / a > 2.MyBatis分页插件统计总记录数total失效的问题< / h2 > < p > 检查一下分页插件的配置 选择以下正确的分页插件配置< / p >
< figure class = "highlight java" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < span class = "line" > 20< / span > < br > < span class = "line" > 21< / span > < br > < span class = "line" > 22< / span > < br > < span class = "line" > 23< / span > < br > < span class = "line" > 24< / span > < br > < span class = "line" > 25< / span > < br > < span class = "line" > 26< / span > < br > < span class = "line" > 27< / span > < br > < span class = "line" > 28< / span > < br > < span class = "line" > 29< / span > < br > < span class = "line" > 30< / span > < br > < span class = "line" > 31< / span > < br > < span class = "line" > 32< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "keyword" > package< / span > com.atguigu.common.config.mp;< / span > < br > < span class = "line" > < / span > < br > < span class = "line" > < span class = "keyword" > import< / span > com.baomidou.mybatisplus.annotation.DbType;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > com.baomidou.mybatisplus.autoconfigure.ConfigurationCustomizer;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > org.mybatis.spring.annotation.MapperScan;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > org.springframework.context.annotation.Bean;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > org.springframework.context.annotation.Configuration;< / span > < br > < span class = "line" > < / span > < br > < span class = "line" > < span class = "comment" > /**< / span > < / span > < br > < span class = "line" > < span class = "comment" > * mp的分页插件< / span > < / span > < br > < span class = "line" > < span class = "comment" > */< / span > < / span > < br > < span class = "line" > < span class = "meta" > @Configuration< / span > < / span > < br > < span class = "line" > < span class = "meta" > @MapperScan(" com.atguigu.auth.mapper" )< / span > < / span > < br > < span class = "line" > < span class = "keyword" > public< / span > < span class = "keyword" > class< / span > < span class = "title class_" > MybatisPlusConfig< / span > { < / span > < br > < span class = "line" > < / span > < br > < span class = "line" > < span class = "comment" > /**< / span > < / span > < br > < span class = "line" > < span class = "comment" > * 新的分页插件,一缓和二缓遵循mybatis的规则,需要设置 MybatisConfiguration#useDeprecatedExecutor = false 避免缓存出现问题(该属性会在旧插件移除后一同移除)< / span > < / span > < br > < span class = "line" > < span class = "comment" > */< / span > < / span > < br > < span class = "line" > < span class = "meta" > @Bean< / span > < / span > < br > < span class = "line" > < span class = "keyword" > public< / span > MybatisPlusInterceptor < span class = "title function_" > mybatisPlusInterceptor< / span > < span class = "params" > ()< / span > { < / span > < br > < span class = "line" > < span class = "type" > MybatisPlusInterceptor< / span > < span class = "variable" > interceptor< / span > < span class = "operator" > =< / span > < span class = "keyword" > new< / span > < span class = "title class_" > MybatisPlusInterceptor< / span > ();< / span > < br > < span class = "line" > interceptor.addInnerInterceptor(< span class = "keyword" > new< / span > < span class = "title class_" > PaginationInnerInterceptor< / span > (DbType.MYSQL));< / span > < br > < span class = "line" > < span class = "keyword" > return< / span > interceptor;< / span > < br > < span class = "line" > } < / span > < br > < span class = "line" > < / span > < br > < span class = "line" > < span class = "meta" > @Bean< / span > < / span > < br > < span class = "line" > < span class = "keyword" > public< / span > ConfigurationCustomizer < span class = "title function_" > c
< figure class = "highlight java" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < span class = "line" > 20< / span > < br > < span class = "line" > 21< / span > < br > < span class = "line" > 22< / span > < br > < span class = "line" > 23< / span > < br > < span class = "line" > 24< / span > < br > < span class = "line" > 25< / span > < br > < span class = "line" > 26< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "keyword" > package< / span > com.atguigu.config;< / span > < br > < span class = "line" > < / span > < br > < span class = "line" > < span class = "keyword" > import< / span > com.baomidou.mybatisplus.core.injector.ISqlInjector;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > com.baomidou.mybatisplus.extension.injector.LogicSqlInjector;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > org.springframework.context.annotation.Bean;< / span > < br > < span class = "line" > < span class = "keyword" > import< / span > org.springframework.context.annotation.Configuration;< / span > < br > < span class = "line" > < / span > < br > < span class = "line" > < span class = "comment" > /**< / span > < / span > < br > < span class = "line" > < span class = "comment" > * < span class = "doctag" > @author< / span > GongChangjiang< / span > < / span > < br > < span class = "line" > < span class = "comment" > * < span class = "doctag" > @version< / span > 1.0< / span > < / span > < br > < span class = "line" > < span class = "comment" > * < span class = "doctag" > @Date< / span > 2023/3/4< / span > < / span > < br > < span class = "line" > < span class = "comment" > * < span class = "doctag" > @Description< / span > mybatis-plus的配置文件< / span > < / span > < br > < span class = "line" > < span class = "comment" > */< / span > < / span > < br > < span class = "line" > < span class = "meta" > @Configuration< / span > < / span > < br > < span class = "line" > < span class = "keyword" > public< / span > < span class = "keyword" > class< / span > < span class = "title class_" > MpConfig< / span > { < / span > < br > < span class = "line" > < / span > < br > < span class = "line" > < span class = "comment" > /**< / span > < / span > < br > < span class = "line" > < span class = "comment" > * 分页插件< / span > < / span > < br > < span class = "line" > < span class = "comment" > */< / span > < / span > < br > < span class = "line" > < span class = "meta" > @Bean< / span > < / span > < br > < span class = "line" > < span class = "keyword" > public< / span > PaginationInterceptor < span class = "title function_" > paginationInterceptor< / span > < span class = "params" > ()< / span > { < / span > < br > < span class = "line" > < span class = "keyword" > return< / span > < span class = "keyword" > new< / span > < span class = "title class_" > PaginationInterceptor< / span > ();< / span > < br > < span class = "line" > } < / span > < br > < span class = "line" > } < / span > < br > < span class = "line" > < / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h2 id = "3-网关中的路由问题" > < a href = "#3-网关中的路由问题" class = "headerlink" title = "3.网关中的路由问题" > < / a > 3.网关中的路由问题< / h2 > < p > 网关中的路由匹配问题,模糊的路由放在精确的路由前面,容易是精确的路由配置失效< / p >
< figure class = "highlight yaml" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < span class = "line" > 12< / span > < br > < span class = "line" > 13< / span > < br > < span class = "line" > 14< / span > < br > < span class = "line" > 15< / span > < br > < span class = "line" > 16< / span > < br > < span class = "line" > 17< / span > < br > < span class = "line" > 18< / span > < br > < span class = "line" > 19< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "attr" > spring:< / span > < / span > < br > < span class = "line" > < span class = "attr" > cloud:< / span > < / span > < br > < span class = "line" > < span class = "attr" > gateway:< / span > < / span > < br > < span class = "line" > < span class = "attr" > routes:< / span > < / span > < br > < span class = "line" > < span class = "comment" > #这个是精确的路由,下面的路由在前,特定的请求就不会转发到这个请求中来< / span > < / span > < br > < span class = "line" > < span class = "bullet" > -< / span > < span class = "attr" > id:< / span > < span class = "string" > product_route< / span > < / span > < br > < span class = "line" > < span class = "attr" > uri:< / span > < span class = "string" > lb://gulimall-product< / span > < / span > < br > < span class = "line" > < span class = "attr" > predicates:< / span > < / span > < br > < span class = "line" > < span class = "bullet" > -< / span > < span class = "string" > Path=/api/product/**< / span > < / span > < br > < span class = "line" > < span class = "attr" > filters:< / span > < / span > < br > < span class = "line" > < span class = "bullet" > -< / span > < span class = "string" > RewritePath=/api/(?< segment> .*),/$\{ segment} < / span > < / span > < br > < span class = "line" > < / span > < br > < span class = "line" > < span class = "comment" > #这个是模糊的路由,如果放在上面的那个路由配置的前面,会导致上面的那个路由配置失效< / span > < / span > < br > < span class = "line" > < span class = "bullet" > -< / span > < span class = "attr" > id:< / span > < span class = "string" > admin_route< / span > < / span > < br > < span class = "line" > < span class = "attr" > uri:< / span > < span class = "string" > lb://renren-fast< / span > < / span > < br > < span class = "line" > < span class = "attr" > predicates:< / span > < / span > < br > < span class = "line" > < span class = "bullet" > -< / span > < span class = "string" > Path=/api/**< / span > < / span > < br > < span class = "line" > < span class = "attr" > filters:< / span > < / span > < br > < span class = "line" > < span class = "bullet" > -< / span > < span class = "string" > RewritePath=/api/(?< segment> .*),/renren-fast/$\{ segment} < / span > < / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
2024-04-02 11:00:46 +08:00
< h2 id = "4-Docker中部署mysql后SpringBoot连接时提示表不存在" > < a href = "#4-Docker中部署mysql后SpringBoot连接时提示表不存在" class = "headerlink" title = "4.Docker中部署mysql后SpringBoot连接时提示表不存在" > < / a > 4.Docker中部署mysql后SpringBoot连接时提示表不存在< / h2 > < p > 使用Docer启动容器的时候设置忽略大小写, 表不存在是因为表名大小写的原因。< / p >
2023-09-22 21:57:28 +08:00
< p > < strong > 方案一:启动的时候加上– lower_case_table_names= 1< / strong > < / p >
< figure class = "highlight shell" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > docker run -p 3306:3306 --name mysql -v /usr/local/docker/mysql/conf:/etc/mysql -v /usr/local/docker/mysql/logs:/var/log/mysql -v /usr/local/docker/mysql/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 -d mysql:5.7 --lower_case_table_names= 1< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< p > < strong > 方案二: 修改mysql挂载在宿主机的配置文件< / strong > < / p >
< figure class = "highlight properties" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "comment" > # 在配置文件中添加如下的配置< / span > < / span > < br > < span class = "line" > < span class = "attr" > lower_case_table_names< / span > =< span class = "string" > 1< / span > < / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
2024-04-02 11:00:46 +08:00
< h1 id = "二-细节知识" > < a href = "#二-细节知识" class = "headerlink" title = "二.细节知识" > < / a > 二.细节知识< / h1 > < h2 id = "1-Linux开启-关闭防火墙的命令" > < a href = "#1-Linux开启-关闭防火墙的命令" class = "headerlink" title = "1.Linux开启/关闭防火墙的命令" > < / a > 1.Linux开启/ 关闭防火墙的命令< / h2 > < figure class = "highlight shell" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "meta prompt_" > # < / span > < span class = "language-bash" > 检查防火墙状态:< / span > < / span > < br > < span class = "line" > systemctl status firewalld< / span > < br > < span class = "line" > < span class = "meta prompt_" > # < / span > < span class = "language-bash" > 开启防火墙< / span > < / span > < br > < span class = "line" > systemctl start firewalld< / span > < br > < span class = "line" > < span class = "meta prompt_" > # < / span > < span class = "language-bash" > 关闭防火墙(有时间限制)< / span > < / span > < br > < span class = "line" > systemctl stop firewalld< / span > < br > < span class = "line" > < span class = "meta prompt_" > # < / span > < span class = "language-bash" > 设置开机禁用防火墙(先执行上面一条命令之后执行此命令,即可永久关闭)< / span > < / span > < br > < span class = "line" > systemctl disable firewalld.service< / span > < br > < span class = "line" > < span class = "meta prompt_" > # < / span > < span class = "language-bash" > 设置开机启用防火墙< / span > < / span > < br > < span class = "line" > systemctl enable firewalld.service< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h2 id = "2-windows查看端口占用情况-杀死端口的命令" > < a href = "#2-windows查看端口占用情况-杀死端口的命令" class = "headerlink" title = "2.windows查看端口占用情况,杀死端口的命令" > < / a > 2.windows查看端口占用情况,杀死端口的命令< / h2 > < figure class = "highlight shell" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "meta prompt_" > # < / span > < span class = "language-bash" > 查询被占用的端口号的信息< / span > < / span > < br > < span class = "line" > netstat -ano | findstr " 8080" < / span > < br > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 根据端口号的PID杀死该端口的进程 其中 17156 是8080端口的PID值< / span > < / span > < br > < span class = "line" > taskkill /pid 17156 /f< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h2 id = "3-Linux开启关闭键盘背光灯" > < a href = "#3-Linux开启关闭键盘背光灯" class = "headerlink" title = "3.Linux开启关闭键盘背光灯" > < / a > 3.Linux开启关闭键盘背光灯< / h2 > < figure class = "highlight shell" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 不是永久有效的< / span > < / span > < br > < span class = "line" > < span class = "meta prompt_" > # < / span > < span class = "language-bash" > 开启键盘背光灯< / span > < / span > < br > < span class = "line" > xset led named " Scroll Lock" < / span > < br > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 关闭键盘背光灯< / span > < / span > < br > < span class = "line" > xset -led named " Scroll Lock" < / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h2 id = "4-关闭Mysql的服务" > < a href = "#4-关闭Mysql的服务" class = "headerlink" title = "4.关闭Mysql的服务" > < / a > 4.关闭Mysql的服务< / h2 > < figure class = "highlight shell" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 查找是否安装了mysql的服务< / span > < / span > < br > < span class = "line" > rpm -qa | grep -i mysql< / span > < br > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 查看mysql服务的状态< / span > < / span > < br > < span class = "line" > service mysqld status< / span > < br > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 关闭mysql的服务< / span > < / span > < br > < span class = "line" > service mysqld stop< / span > < br > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 重启的命令< / span > < / span > < br > < span class = "line" > service mysqld restart< / span > < br > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 关闭开机自启动< / span > < / span > < br > < span class = "line" > systemctl disable mysqld< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h2 id = "5-前端向后端传递对象数据" > < a href = "#5-前端向后端传递对象数据" class = "headerlink" title = "5.前端向后端传递对象数据" > < / a > 5.前端向后端传递对象数据< / h2 > < p > 传递普通对象参数的写法< / p >
< p > params: searchObj< / p >
< figure class = "highlight javascript" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "title function_" > getPageList< / span > (< span class = "params" > current,limit,searchObj< / span > ){ < / span > < br > < span class = "line" > < span class = "keyword" > return< / span > < span class = "title function_" > request< / span > ({ < / span > < br > < span class = "line" > < span class = "attr" > url< / span > : < span class = "string" > `< span class = "subst" > ${ api_name} < / span > /< span class = "subst" > ${ current} < / span > /< span class = "subst" > ${ limit} < / span > `< / span > ,< / span > < br > < span class = "line" > < span class = "attr" > method< / span > : < span class = "string" > ' get' < / span > ,< / span > < br > < span class = "line" > < span class = "attr" > params< / span > : searchObj < span class = "comment" > //使用这种方式进行传递< / span > < / span > < br > < span class = "line" > } )< / span > < br > < span class = "line" > } < / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< figure class = "highlight java" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < span class = "line" > 9< / span > < br > < span class = "line" > 10< / span > < br > < span class = "line" > 11< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "meta" > @GetMapping(" /{ page} /{ limit} " )< / span > < / span > < br > < span class = "line" > < span class = "keyword" > public< / span > Result < span class = "title function_" > pageQueryRole< / span > < span class = "params" > (< span class = "meta" > @PathVariable< / span > Long page,< / span > < / span > < br > < span class = "line" > < span class = "params" > < span class = "meta" > @PathVariable< / span > Integer limit,< / span > < / span > < br > < span class = "line" > < span class = "params" > SysRoleQueryVo sysRoleQueryVo)< / span > { < span class = "comment" > //普通的对象进行接收 没有添加注解< / span > < / span > < br > < span class = "line" > < / span > < br > < span class = "line" > Page< SysRole> pageParam = < span class = "keyword" > new< / span > < span class = "title class_" > Page< / span > < > (page, limit);< / span > < br > < span class = "line" > LambdaQueryWrapper< SysRole> queryWrapper = < span class = "keyword" > new< / span > < span class = "title class_" > LambdaQueryWrapper< / span > < > ();< / span > < br > < span class = "line" > queryWrapper.like(!StringUtils.isEmpty(sysRoleQueryVo.getRoleName()),SysRole::getRoleName, sysRoleQueryVo.getRoleName());< / span > < br > < span class = "line" > Page< SysRole> sysRolePage = sysRoleService.page(pageParam, queryWrapper);< / span > < br > < span class = "line" > < span class = "keyword" > return< / span > Result.ok(sysRolePage);< / span > < br > < span class = "line" > } < / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< p > json格式的传递< / p >
< p > data: searchObj< / p >
< figure class = "highlight javascript" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "title function_" > add< / span > (< span class = "params" > sysRole< / span > ){ < / span > < br > < span class = "line" > < span class = "keyword" > return< / span > < span class = "title function_" > request< / span > ({ < / span > < br > < span class = "line" > < span class = "attr" > url< / span > : < span class = "string" > `< span class = "subst" > ${ api_name} < / span > /save`< / span > ,< / span > < br > < span class = "line" > < span class = "attr" > method< / span > : < span class = "string" > ' post' < / span > ,< / span > < br > < span class = "line" > < span class = "attr" > data< / span > : sysRole < span class = "comment" > //使用这种方式进行传递< / span > < / span > < br > < span class = "line" > } )< / span > < br > < span class = "line" > } < / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< figure class = "highlight java" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "meta" > @PostMapping(" /save" )< / span > < / span > < br > < span class = "line" > < span class = "keyword" > public< / span > Result < span class = "title function_" > save< / span > < span class = "params" > (< span class = "meta" > @RequestBody< / span > SysRole sysRole)< / span > { < span class = "comment" > //JSON格式对象的传递 需要使用注解@RequestBody< / span > < / span > < br > < span class = "line" > < span class = "type" > boolean< / span > < span class = "variable" > isSave< / span > < span class = "operator" > =< / span > sysRoleService.save(sysRole);< / span > < br > < span class = "line" > < span class = "keyword" > return< / span > isSave? Result.ok() : Result.fail();< / span > < br > < span class = "line" > } < / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h2 id = "6-调整日志的级别" > < a href = "#6-调整日志的级别" class = "headerlink" title = "6.调整日志的级别" > < / a > 6.调整日志的级别< / h2 > < figure class = "highlight yaml" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "attr" > logging:< / span > < / span > < br > < span class = "line" > < span class = "attr" > level:< / span > < / span > < br > < span class = "line" > < span class = "comment" > # 注意这里包的路径, 要根据实际情况t< / span > < / span > < br > < span class = "line" > < span class = "attr" > com.atguigu.gulimall:< / span > < span class = "string" > debug< / span > < / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h2 id = "7-JsonInclude注解" > < a href = "#7-JsonInclude注解" class = "headerlink" title = "7.@JsonInclude注解" > < / a > 7.@JsonInclude注解< / h2 > < figure class = "highlight java" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "meta" > @JsonInclude(JsonInclude.Include.NON_EMPTY)< / span > < span class = "comment" > //这里是当children为空的时候, 向前端传递数据就不带这个< / span > < / span > < br > < span class = "line" > < span class = "keyword" > private< / span > List< CategoryEntity> children;< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
< h2 id = "8-node相关的问题" > < a href = "#8-node相关的问题" class = "headerlink" title = "8.node相关的问题" > < / a > 8.node相关的问题< / h2 > < figure class = "highlight shell" > < table > < tr > < td class = "gutter" > < pre > < span class = "line" > 1< / span > < br > < span class = "line" > 2< / span > < br > < span class = "line" > 3< / span > < br > < span class = "line" > 4< / span > < br > < span class = "line" > 5< / span > < br > < span class = "line" > 6< / span > < br > < span class = "line" > 7< / span > < br > < span class = "line" > 8< / span > < br > < / pre > < / td > < td class = "code" > < pre > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 查看node的版本< / span > < / span > < br > < span class = "line" > node -v< / span > < br > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 查看npm的版本< / span > < / span > < br > < span class = "line" > npm -v< / span > < br > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 查看npm使用的镜像源(npm镜像源)< / span > < / span > < br > < span class = "line" > npm get registry< / span > < br > < span class = "line" > < span class = "meta prompt_" > #< / span > < span class = "language-bash" > 设置淘宝镜像源< / span > < / span > < br > < span class = "line" > npm config set registry http://registry.npm.taobao.org< / span > < br > < / pre > < / td > < / tr > < / table > < / figure >
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< / article > < div class = "tag_share" > < div class = "post-meta__tag-list" > < a class = "post-meta__tags" href = "/tags/Java/" > Java< / a > < / div > < div class = "post_share" > < div class = "social-share" data-image = "/img/7.png" data-sites = "wechat,weibo,qq" > < / div > < link rel = "stylesheet" href = "/cdn/css/share.min.css" media = "print" onload = "this.media='all'" > < script src = "/cdn/js/social-share.min.js" defer > < / script > < / div > < / div > < div class = "post-reward" > < div class = "reward-button" > < i class = "fas fa-qrcode" > < / i > 打赏< / div > < div class = "reward-main" > < ul class = "reward-all" > < li class = "reward-item" > < a href = "/img/wechat.jpg" target = "_blank" > < img class = "post-qr-code-img" src = "/img/wechat.jpg" alt = "微信" / > < / a > < div class = "post-qr-code-desc" > 微信< / div > < / li > < li class = "reward-item" > < a href = "/img/alipay.jpg" target = "_blank" > < img class = "post-qr-code-img" src = "/img/alipay.jpg" alt = "支付宝" / > < / a > < div class = "post-qr-code-desc" > 支付宝< / div > < / li > < / ul > < / div > < / div > < br / > < div id = "post-comment" > < div class = "comment-head" > < div class = "comment-headline" > < i class = "far fa-comment-alt fa-fw" > < / i > < span > 评论< / span > < / div > < / div > < div class = "comment-wrap" > < div > < div id = "gitalk-container" > < / div > < / div > < / div > < / div > < / div > < div class = "aside-content" id = "aside-content" > < div class = "card-widget card-info" > < div class = "is-center" > < div class = "avatar-img" > < img src = "/img/avatar.jpg" onerror = "this.onerror=null;this.src='/img/loading.gif'" alt = "avatar" / > < / div > < div class = "author-info__name" > Jason< / div > < div class = "author-info__description" > Debug the World! < / div > < / div > < div class = "card-info-data site-data is-center" > < a href = "/archives/" > < div class = "headline" > 文章< / div > < div class = "length-num" > 60< / div > < / a > < a href = "/tags/" > < div class = "headline" > 标签< / div > < div class = "length-num" > 39< / div > < / a > < a href = "/categories/" > < div class = "headline" > 分类< / div > < div class = "length-num" > 10< / div > < / a > < / div > < a id = "card-info-btn" > < i class = "fab fa-microsoft" > < / i > < span > Ctrl + D 收藏< / span > < / a > < div class = "card-info-social-icons is-center" > < a class = "social-icon" href = "https://github.com/JasonsGong" target = "_blank" title = "Github" > < i class = "fab fa-github" > < / i > < / a > < a class = "social-icon" href = "tencent://AddContact/?fromId=45&fromSubId=1&subcmd=all&uin=2602183349&website=www.oicqzone.com" target = "_blank" title = "QQ" > < i class = "fab fa-qq" > < / i > < / a > < a class = "social-icon" href = "mailto:2602183349@qq.com" target = "_blank" title = "Email" > < i class = "fas fa-envelope-open-text" > < / i > < / a > < a class = "social-icon" href = "https://github.com/JasonsGong?tab=repositories" target = "_blank" title = "代码仓库" > < i class = "fas fa-database" > < / i > < / a > < / div > < / div > < div class = "card-widget card-announcement" > < div class = "item-headline" > < i class = "fas fa-bullhorn fa-shake" > < / i > < span > 公告< / span > < / div > < div class = "announcement_content" > 本网站是静态网站,更新页面资源请使用Ctrl+F5;若网站内文章对你有帮助,请使用Ctrl+D收藏该网站! < / div > < / div > < div class = "sticky_layout" > < div class = "card-widget" id = "card-toc" > < div class = "item-headline" > < i class = "fas fa-stream" > < / i > < span > 目录< / span > < span class = "toc-percentage" > < / span > < / div > < div class = "toc-content is-expand" > < ol class = "toc" > < li class = "toc-item toc-level-1" > < a class = "toc-link" href = "#%E4%B8%80-%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98" > < span class = "toc-text" > 一.常见问题< / span > < / a > < ol class = "toc-child" > < li class = "toc-item toc-level-2" > < a class = "toc-link" href = "#1-%E5%89%8D%E5%90%8E%E7%AB%AF%E6%97%B6%E9%97%B4%E6%A0%BC%E5%BC%8F%E7%9A%84%E9%97%AE%E9%A2%98" > < span class = "toc-text" > 1.前后端时间格式的问题< / span > < / a > < / li > < li class = "toc-item toc-level-2" > < a class = "toc-link" href = "#2-MyBatis%E5%88%86%E9%A1%B5%E6%8F%92%E4%BB%B6%E7%BB%9F%E8%AE%A1%E6%80%BB%E8%AE%B0%E5%BD%95%E6%95%B0total%E5%A4%B1%E6%95%88%E7%9A%84%E9%97%AE%E9%A2%98" > < span class = "toc-text" > 2.MyBatis分页插件统计总记录数total失效的问题< / span > < / a > < / li > < li class = "toc-item toc-level-2" > < a class = "toc-link" href = "#3-%E7%BD%91%E5%85%B3%E4%B8%AD%E7%9A%84%E8%B7%AF%E7%94%B1%E9%97%AE%E9%A2%98" > < span class = "toc-text" > 3.网关中的路由问题< / span > < / a > < / li > < li class = "toc-item toc-level-2" > < a class = "toc-link" h
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function initGitalk () {
var gitalk = new Gitalk(Object.assign({
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repo: 'BlogComment',
owner: 'JasonsGong',
admin: ['JasonsGong'],
id: 'efbec6632bb909eeaa5e1cfaecaa9253',
updateCountCallback: commentCount
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gitalk.render('gitalk-container')
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if (typeof Gitalk === 'function') initGitalk()
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getCSS('/cdn/css/gitalk.min.css')
getScript('/cdn/js/gitalk.min.js').then(initGitalk)
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}
function commentCount(n){
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isCommentCount.textContent= n
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if (true) btf.loadComment(document.getElementById('gitalk-container'), loadGitalk)
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loadGitalk()
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}< / script > < / div > < script async data-pjax src = "//busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js" > < / script > < div id = "local-search" > < div class = "search-dialog" > < nav class = "search-nav" > < span class = "search-dialog-title" > 搜索< / span > < span id = "loading-status" > < / span > < button class = "search-close-button" > < i class = "fas fa-times" > < / i > < / button > < / nav > < div class = "is-center" id = "loading-database" > < i class = "fas fa-spinner fa-pulse" > < / i > < span > 数据库加载中< / span > < / div > < div class = "search-wrap" > < div id = "local-search-input" > < div class = "local-search-box" > < input class = "local-search-box--input" placeholder = "搜索文章" type = "text" / > < / div > < / div > < br / > < div class = "no-result" id = "local-search-results" > < / div > < div id = "local-search-stats-wrap" > < / div > < / div > < / div > < div id = "search-mask" > < / div > < script src = "/js/search/local-search.js" > < / script > < / div > < / div > <!-- hexo injector body_end start --> < script data-pjax >
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function butterfly_swiper_injector_config(){
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var parent_div_git = document.getElementById('recent-posts');
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var item_html = '< div class = "recent-post-item" style = "height: auto;width: 100%" > < div class = "blog-slider swiper-container-fade swiper-container-horizontal" id = "swiper_container" > < div class = "blog-slider__wrp swiper-wrapper" style = "transition-duration: 0ms;" > < div class = "blog-slider__item swiper-slide" style = "width: 750px; opacity: 1; transform: translate3d(0px, 0px, 0px); transition-duration: 0ms;" > < a class = "blog-slider__img" href = "posts/19306.html" alt = "" > < img width = "48" height = "48" src = "/img/1.png" alt = "" onerror = "this.src=https://unpkg.zhimg.com/akilar-candyassets/image/loading.gif; this.onerror = null;" / > < / a > < div class = "blog-slider__content" > < span class = "blog-slider__code" > 2023-04-21< / span > < a class = "blog-slider__title" href = "posts/19306.html" alt = "" > Docker容器化技术< / a > < div class = "blog-slider__text" > Docker< / div > < a class = "blog-slider__button" href = "posts/19306.html" alt = "" > 详情 < / a > < / div > < / div > < div class = "blog-slider__item swiper-slide" style = "width: 750px; opacity: 1; transform: translate3d(0px, 0px, 0px); transition-duration: 0ms;" > < a class = "blog-slider__img" href = "posts/47003.html" alt = "" > < img width = "48" height = "48" src = "/img/5.png" alt = "" onerror = "this.src=https://unpkg.zhimg.com/akilar-candyassets/image/loading.gif; this.onerror = null;" / > < / a > < div class = "blog-slider__content" > < span class = "blog-slider__code" > 2023-03-10< / span > < a class = "blog-slider__title" href = "posts/47003.html" alt = "" > 常用正则表达式大全< / a > < div class = "blog-slider__text" > 正则表达式< / div > < a class = "blog-slider__button" href = "posts/47003.html" alt = "" > 详情 < / a > < / div > < / div > < div class = "blog-slider__item swiper-slide" style = "width: 750px; opacity: 1; transform: translate3d(0px, 0px, 0px); transition-duration: 0ms;" > < a class = "blog-slider__img" href = "posts/20683.html" alt = "" > < img width = "48" height = "48" src = "/img/8.png" alt = "" onerror = "this.src=https://unpkg.zhimg.com/akilar-candyassets/image/loading.gif; this.onerror = null;" / > < / a > < div class = "blog-slider__content" > < span class = "blog-slider__code" > 2023-06-05< / span > < a class = "blog-slider__title" href = "posts/20683.html" alt = "" > Linux中开发环境的搭建< / a > < div class = "blog-slider__text" > 环境搭建< / div > < a class = "blog-slider__button" href = "posts/20683.html" alt = "" > 详情 < / a > < / div > < / div > < div class = "blog-slider__item swiper-slide" style = "width: 750px; opacity: 1; transform: translate3d(0px, 0px, 0px); transition-duration: 0ms;" > < a class = "blog-slider__img" href = "posts/63333.html" alt = "" > < img width = "48" height = "48" src = "/img/10.png" alt = "" onerror = "this.src=https://unpkg.zhimg.com/akilar-candyassets/image/loading.gif; this.onerror = null;" / > < / a > < div class = "blog-slider__content" > < span class = "blog-slider__code" > 2023-06-03< / span > < a class = "blog-slider__title" href = "posts/63333.html" alt = "" > 开发环境的搭建< / a > < div class = "blog-slider__text" > 环境搭建< / div > < a class = "blog-slider__button" href = "posts/63333.html" alt = "" > 详情 < / a > < / div > < / div > < / div > < div class = "blog-slider__pagination swiper-pagination-clickable swiper-pagination-bullets" > < / div > < / div > < / div > ';
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if (parent_div_git !== null & & typeof parent_div_git !== 'undefined') {
parent_div_git.insertAdjacentHTML("afterbegin",item_html)
}
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}
var elist = 'undefined'.split(',');
var cpage = location.pathname;
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var epage = 'all';
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var flag = 0;
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if ((epage ==='all')& & (flag == 0)){
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butterfly_swiper_injector_config();
}
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< / script > < script defer src = "https://npm.elemecdn.com/hexo-butterfly-swiper/lib/swiper.min.js" > < / script > < script defer data-pjax src = "https://npm.elemecdn.com/hexo-butterfly-swiper/lib/swiper_init.js" > < / script > <!-- hexo injector body_end end --> < / body > < / html >