<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[xplan5的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/xplan5</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; xplan5]]></copyright><item><title><![CDATA[信号量是什么]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/135044498</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/135044498</guid><author>xplan5</author><pubDate>Sun, 17 Dec 2023 14:28:40 +0800</pubDate><description><![CDATA[什么是信号量]]></description><category></category></item><item><title><![CDATA[实现定时任务的分布式控制]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/135044391</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/135044391</guid><author>xplan5</author><pubDate>Sun, 17 Dec 2023 14:20:07 +0800</pubDate><description><![CDATA[定时任务的分布式实现]]></description><category></category></item><item><title><![CDATA[关于 GC]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/129638870</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/129638870</guid><author>xplan5</author><pubDate>Sat, 18 Mar 2023 16:28:44 +0800</pubDate><description><![CDATA[jvm gc]]></description><category></category></item><item><title><![CDATA[一个页面从输入URL到页面加载完成，都做了什么？]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/127793615</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/127793615</guid><author>xplan5</author><pubDate>Thu, 10 Nov 2022 19:30:27 +0800</pubDate><description><![CDATA[http请求过程]]></description><category></category></item><item><title><![CDATA[Maven核心概念 pom.xml]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/125473646</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/125473646</guid><author>xplan5</author><pubDate>Sat, 20 Aug 2022 13:13:05 +0800</pubDate><description><![CDATA[maven的坐标与依赖]]></description><category></category></item><item><title><![CDATA[mybatis字段映射的容错性]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/126431763</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/126431763</guid><author>xplan5</author><pubDate>Fri, 19 Aug 2022 20:55:42 +0800</pubDate><description><![CDATA[mybatis字段映射的容错性]]></description><category></category></item><item><title><![CDATA[maven仓库说明]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/125473618</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/125473618</guid><author>xplan5</author><pubDate>Fri, 15 Jul 2022 22:16:01 +0800</pubDate><description><![CDATA[maven]]></description><category></category></item><item><title><![CDATA[maven插件与目标]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/125473633</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/125473633</guid><author>xplan5</author><pubDate>Fri, 15 Jul 2022 22:14:39 +0800</pubDate><description><![CDATA[maven的插件和命令]]></description><category></category></item><item><title><![CDATA[Maven 生命周期]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/125473585</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/125473585</guid><author>xplan5</author><pubDate>Mon, 11 Jul 2022 11:54:14 +0800</pubDate><description><![CDATA[maven的生命周期]]></description><category></category></item><item><title><![CDATA[Maven 简介与安装]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/125473530</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/125473530</guid><author>xplan5</author><pubDate>Mon, 11 Jul 2022 10:29:43 +0800</pubDate><description><![CDATA[maven安装]]></description><category></category></item><item><title><![CDATA[spring boot 集成swagger3]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/122438633</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/122438633</guid><author>xplan5</author><pubDate>Tue, 11 Jan 2022 18:22:17 +0800</pubDate><description><![CDATA[swagger3整合，spring boot2.6集成swagger]]></description><category></category></item><item><title><![CDATA[log4j2中Pattern Layout 对消息体转义]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/121778570</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/121778570</guid><author>xplan5</author><pubDate>Tue, 07 Dec 2021 20:57:28 +0800</pubDate><description><![CDATA[log4j对消息体进行转义]]></description><category></category></item><item><title><![CDATA[Elasticsearch SQL]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/119903438</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/119903438</guid><author>xplan5</author><pubDate>Mon, 18 Oct 2021 15:06:45 +0800</pubDate><description><![CDATA[Elasticsearch SQL 是一个X-Pack组件，允许对Elasticsearch实时执行类似SQL的查询，为Elasticsearch提供一个强大而轻量的SQL接口。
无论使用REST接口，命令行还是JDBC,任何客户机都可以使用SQL对EsasticSearch进行查询。Elasticsearch SQL是一个将SQL转换为DQL的转换器。主要针对于查询操作。
约定
很多人习惯地把ElasticSerach和数据库进行类比，如 一个ES索引等同于一张数据库表，一条Document记录等同于一行]]></description><category></category></item><item><title><![CDATA[脱离spring cloud使用feign]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/120703889</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/120703889</guid><author>xplan5</author><pubDate>Mon, 11 Oct 2021 15:17:03 +0800</pubDate><description><![CDATA[spring-cloud-feign是spring cloud微服务之间调用封装的功能，由于feign的封装和解耦做的比较好，因此脱离spring cloud也能使用。
Spring boot项目使用feign
项目背景:spring boot 2.2.5.RELEASE
引入Maven
        &lt;dependency&gt;
            &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
            &lt]]></description><category></category></item><item><title><![CDATA[When allowCredentials is true, allowedOrigins cannot contain the special value “*“ since that cannot]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/120293015</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/120293015</guid><author>xplan5</author><pubDate>Tue, 14 Sep 2021 18:00:38 +0800</pubDate><description><![CDATA[springboot + html 项目
后端启动项目之后，前端页面访问，前端页面500，后端报错，核心报错内容如下：

2021-09-14 17:48:49.275  INFO 14196 --- [nio-9000-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2021-09-14 17:48:49.276  INFO 14196.]]></description><category></category></item><item><title><![CDATA[MySQL]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/119983772</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/119983772</guid><author>xplan5</author><pubDate>Sun, 29 Aug 2021 18:40:46 +0800</pubDate><description><![CDATA[MySQL

Structured Query Language：结构化查询语言,用于定义操作关系型数据库的规则。

常见数据类型
整型

TINYINT
SMALLINT
MEDIUMINT
INT
BIGINT

浮点型

FLOAT(n,m)
DOUBLE(n,m)
DECIMAL(n,m)

n:整数部位+小数部位的最大长度
m:小数部位的最大长度
字符型

CHAR(n)

n为字符的最大个数,可选，默认是1，固定长度的字符。


VARCHAR(n)

n为字符的最大个数，必写，可变长度的字符。]]></description><category></category></item><item><title><![CDATA[常用SQL命令]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/119981614</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/119981614</guid><author>xplan5</author><pubDate>Sun, 29 Aug 2021 16:08:24 +0800</pubDate><description><![CDATA[SQL

Structured Query Language：结构化查询语言,用于定义操作关系型数据库的规则。

常用SQL命令


SELECT - 从数据库中提取数据

SELECT * FROM table_name;
SELECT column_name,column_name FROM table_name;



UPDATE - 更新数据库中的数据

UPDATE table_name SET column1=value1,column2=value2,… WHERE some_column=]]></description><category></category></item><item><title><![CDATA[ElasticSearch安装]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/118975076</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/118975076</guid><author>xplan5</author><pubDate>Tue, 17 Aug 2021 17:23:18 +0800</pubDate><description><![CDATA[ElasticSearch安装
elasticsearch安装比较简单，如果是本地使用，则拆箱即用。
处安装的es为7.13.1版本
下载地址：https://www.elastic.co/cn/downloads/elasticsearch
Windows安装
下载地址：https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.13.1-windows-x86_64.zip
下载完成后，安排好目录，随后解压即可。
运行
进入解]]></description><category></category></item><item><title><![CDATA[elasticsearch常用综述]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/119386479</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/119386479</guid><author>xplan5</author><pubDate>Wed, 04 Aug 2021 16:06:51 +0800</pubDate><description><![CDATA[快速入门
1. 基础概念-快速入门

Elasticsearch是一个基于Lucene的搜索服务器。它提供了一个分布式多用户能力的全文搜索引擎，基于RESTful web接口。Elasticsearch是用Java语言开发的，并作为Apache许可条款下的开放源码发布，是一种流行的企业级搜索引擎。Elasticsearch用于云计算中，能够达到实时搜索，稳定，可靠，快速，安装使用方便。官方客户端在Java、.NET（C#）、PHP、Python、Apache Groovy、Ruby和许多其他语言中都是可用的]]></description><category></category></item><item><title><![CDATA[lombok基本使用]]></title><link>https://blog.youkuaiyun.com/xplan5/article/details/118657474</link><guid>https://blog.youkuaiyun.com/xplan5/article/details/118657474</guid><author>xplan5</author><pubDate>Wed, 21 Jul 2021 20:35:03 +0800</pubDate><description><![CDATA[lomnok
idea安装lombok插件

pom.xml
   &lt;dependency&gt;
      &lt;groupId&gt;org.projectlombok&lt;/groupId&gt;
      &lt;artifactId&gt;lombok&lt;/artifactId&gt;
      &lt;version&gt;1.18.20&lt;/version&gt;
    &lt;/dependency&gt;

@Setter

自动产生 setter
static ]]></description><category></category></item></channel></rss>