<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[java_Waaangzy的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/java_Waaangzy</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; java_Waaangzy]]></copyright><item><title><![CDATA[Error response from daemon: Get “https://index.docker.io/v1/search?q=redis&n=5“: dial tcp 173.255.20]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/155347665</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/155347665</guid><author>java_Waaangzy</author><pubDate>Fri, 28 Nov 2025 11:30:17 +0800</pubDate><description><![CDATA[摘要 使用docker search命令搜索镜像时出现报错，排查步骤如下： 配置阿里云镜像加速器并重启Docker服务 发现问题仍未解决，咨询得知阿里云加速不支持search命令 建议直接使用pull命令或更换其他镜像加速器 终极解决方案是前往Docker Hub官网手动下载镜像 该问题源于镜像加速器功能限制，并非配置错误所致。]]></description><category></category></item><item><title><![CDATA[502 Bad Gateway]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/154851179</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/154851179</guid><author>java_Waaangzy</author><pubDate>Sat, 15 Nov 2025 00:36:40 +0800</pubDate><description><![CDATA[摘要 本文记录了部署服务时出现502 Bad Gateway问题的排查过程。问题出现在Nginx反向代理配置中，访问特定路径时返回502错误。经过检查网络连通性和防火墙状态后，通过查看Nginx日志发现&quot;SELinux权限拒绝&quot;的错误。最终通过执行setsebool -P httpd_can_network_connect 1命令开启SELinux的网络连接权限解决了问题。文章详细记录了错误现象、排查思路和解决方法，为类似问题提供了参考案例。]]></description><category></category></item><item><title><![CDATA[Linux下配置SSH免密登录]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/141558522</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/141558522</guid><author>java_Waaangzy</author><pubDate>Mon, 26 Aug 2024 11:32:18 +0800</pubDate><description><![CDATA[【代码】Linux下配置SSH免密登录。]]></description><category></category></item><item><title><![CDATA[failed to restart mysql.service: unit not found]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/134835593</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/134835593</guid><author>java_Waaangzy</author><pubDate>Wed, 06 Dec 2023 16:48:09 +0800</pubDate><description><![CDATA[ps: 我这里面有两个是因为之前换过mysql的版本，可能没有删除干净导致重启MySQL服务不好使。如果你有两个以上的话，保留最新的。1、查看此路径下有没有对应的mysql.service文件，有且只能有一个对应的文件名称。2、如果没有mysql.service。在第一步的路径下面添加一个，有且只有一个。3、再次尝试重启MySQL服务命令。]]></description><category></category></item><item><title><![CDATA[通用元数据简介]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/134004821</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/134004821</guid><author>java_Waaangzy</author><pubDate>Tue, 24 Oct 2023 09:42:25 +0800</pubDate><description><![CDATA[type：该字段的属性，dest（属于目标表的，得再模型中存在的）、grouptemp（用来和主表关联的字段）、bigtemp（中间过渡的字段，不体现再目标表中）groupName：分组表表名，来源表通过过滤条件（filterCondition）和分组字段（groupBy）执行sql后，填充的数据。a、别名，当且仅当interfaceType为DB的时候可以填写，如果不填写，默认别名是来源表表名。c、如果同一张DB的来源表被引入多次，别名必须填写，每一张别名表引入的字段可以不一样。]]></description><category></category></item><item><title><![CDATA[minio单点安装和相关api操作]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/128948456</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/128948456</guid><author>java_Waaangzy</author><pubDate>Thu, 09 Feb 2023 10:32:30 +0800</pubDate><description><![CDATA[启动：./minio server /home/deploy/minIO/data。账号密码为：minioadmin/minioadmin。]]></description><category></category></item><item><title><![CDATA[离线安装gitlab]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/128221469</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/128221469</guid><author>java_Waaangzy</author><pubDate>Wed, 07 Dec 2022 16:05:09 +0800</pubDate><description><![CDATA[地址：https://packages.gitlab.com/gitlab/gitlab-ce
rpm -ivh gitlab-ce-15.6.2-ce.0.el7.x86_64.rpm  此处解压的包名需要换成你自己的解压过程中遇到的问题！！！！

出现如上报错信息：需要切换root用户分别执行yum -y install perlyum -y install policycoreutils-python   （8版本可能不缺）注意：8版本可能会缺少 policycoreutils-python-util]]></description><category></category></item><item><title><![CDATA[windows监控并重启进程脚本]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/128116249</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/128116249</guid><author>java_Waaangzy</author><pubDate>Wed, 30 Nov 2022 16:03:44 +0800</pubDate><description><![CDATA[windows监控并重启进程脚本]]></description><category></category></item><item><title><![CDATA[Linux下安装卸载jdk8.x版本]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/127666123</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/127666123</guid><author>java_Waaangzy</author><pubDate>Fri, 04 Nov 2022 00:00:00 +0800</pubDate><description><![CDATA[jdk的下载
linux 下jdk的卸载、安装、查看]]></description><category></category></item><item><title><![CDATA[大数据技术之Hadoop概述集群环境搭建常见错误解决等]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/127678492</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/127678492</guid><author>java_Waaangzy</author><pubDate>Thu, 03 Nov 2022 23:54:54 +0800</pubDate><description><![CDATA[hadoop简介系统推荐及环境搭建，超详细]]></description><category></category></item><item><title><![CDATA[大数据简介与概论]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/127643256</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/127643256</guid><author>java_Waaangzy</author><pubDate>Wed, 02 Nov 2022 00:17:44 +0800</pubDate><description><![CDATA[大数据(Big Data):指**无法在一定时间范围**内用常规软件工具进行捕捉、管理和处理的海量数据集合，是需要全新处理模式才能具有更强的决策力、洞察发现力、及流程优化能力的**海量、高增长率和多样化的信息资产**
大数据主要解决，**海量的数据采集、存储和分析计算问题
数据量可达 **TB、PB、EB 级别**]]></description><category></category></item><item><title><![CDATA[MySQL经典50道练习题]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/126933965</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/126933965</guid><author>java_Waaangzy</author><pubDate>Mon, 19 Sep 2022 15:01:38 +0800</pubDate><description><![CDATA[MySQL经典50道练习题]]></description><category></category></item><item><title><![CDATA[Msql生成随机数]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/124293511</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/124293511</guid><author>java_Waaangzy</author><pubDate>Wed, 20 Apr 2022 11:31:39 +0800</pubDate><description><![CDATA[mysql插入随机数]]></description><category></category></item><item><title><![CDATA[Idea右上角Maven按钮各个作用]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123901207</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123901207</guid><author>java_Waaangzy</author><pubDate>Fri, 01 Apr 2022 16:21:20 +0800</pubDate><description><![CDATA[clean
清理，在进行真正的构建之前进行一些清理工作，移除所有上一次构建生成的文件。执行该命令会删除项目路径下的target文件，但是不会删除本地的maven仓库已经生成的jar文件
validate
验证，验证工程是否正确，所需的信息是否完整
compile
编译源码，编译生成class文件，编译命令，只编译选定的目标，不管之前是否已经编译过，会在你的项目路径下生成一个target目录，在该目录中包含一个classes文件夹，里面全是生成的class文件及字节码文件
test
单元测试，测试
pack.]]></description><category></category></item><item><title><![CDATA[java代码实现掩码转标准掩码，掩码取反之间的相互转换]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123900797</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123900797</guid><author>java_Waaangzy</author><pubDate>Fri, 01 Apr 2022 16:12:35 +0800</pubDate><description><![CDATA[//掩码转标准掩码
    private String ConvertStdMask(String mask) {
        String stdMask = "";
        String[] masks = mask.split("\\.");
        for (String item : masks) {
            String temp = Integer.toBinaryString(Integer.parseInt(item));
            s.]]></description><category></category></item><item><title><![CDATA[idea版本控制忽略.idea文件和.iml文件的问题]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123654898</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123654898</guid><author>java_Waaangzy</author><pubDate>Tue, 22 Mar 2022 10:48:35 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[idea中将项目转换为Maven项目]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123652577</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123652577</guid><author>java_Waaangzy</author><pubDate>Tue, 22 Mar 2022 09:43:03 +0800</pubDate><description><![CDATA[第一步:项目右键-&gt;Add Framework…
选择maven

OK

这样就成功转换成了一个maven项目

]]></description><category></category></item><item><title><![CDATA[java 单例模式(饿汉模式和懒汉模式)]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123583396</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123583396</guid><author>java_Waaangzy</author><pubDate>Fri, 18 Mar 2022 20:15:17 +0800</pubDate><description><![CDATA[单例设计模式(懒汉式、饿汉式)]]></description><category></category></item><item><title><![CDATA[Java 时间格式化及静态方法]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123329669</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123329669</guid><author>java_Waaangzy</author><pubDate>Mon, 07 Mar 2022 14:41:13 +0800</pubDate><description><![CDATA[// 1.8 之前
public static final String DATETIME_PATTERN = "yyyy-MM-dd HH:mm:ss";
// 1.8 之后
private static final String formatDate = "yyyy-MM-dd HH:mm:ss";

    // 1.8 之前
    @Test
    public void dateTest(){
        Date date = new Date();
        SimpleDate]]></description><category></category></item><item><title><![CDATA[Java Block代码块]]></title><link>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123327973</link><guid>https://blog.youkuaiyun.com/java_Waaangzy/article/details/123327973</guid><author>java_Waaangzy</author><pubDate>Mon, 07 Mar 2022 13:18:30 +0800</pubDate><description><![CDATA[以实际代码和简明释义的方式帮助大家快速了解Abstract关键字的理解和使用

  1、代码块的作用：用来初始类，对象
  2、代码块如果有修饰的话只能有static
  3、代码块分两种：静态代码块、非静态代码块
  
静态代码块：
     &gt;类内部可以有输出语句
     &gt;随着类的 加载 而 执行 ,且执行一次(明显区别)
     &gt;作用：初始化类的信息
     &gt;如果一个类中定义了多个静态代码块，则按照声明的先后顺序执行
     &gt;静态代码块的执行要优先与非静态]]></description><category></category></item></channel></rss>