<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[吾生有涯，而知无涯。]]></title><description><![CDATA[志在峰巅的攀登者，不会陶醉在沿途的某个脚印之中。]]></description><link>https://blog.youkuaiyun.com/j59580</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; j59580]]></copyright><item><title><![CDATA[Spring boot 集成 RocketMQ 测试]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/126995367</link><guid>https://blog.youkuaiyun.com/j59580/article/details/126995367</guid><author>j59580</author><pubDate>Thu, 22 Sep 2022 17:15:09 +0800</pubDate><description><![CDATA[Spring Boot 集成 RocketMQ 测试]]></description><category></category></item><item><title><![CDATA[Linux 安装 RocketMQ 4.9.2]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/126988769</link><guid>https://blog.youkuaiyun.com/j59580/article/details/126988769</guid><author>j59580</author><pubDate>Thu, 22 Sep 2022 16:38:26 +0800</pubDate><description><![CDATA[Linux 安装 RocketMQ]]></description><category></category></item><item><title><![CDATA[Parameter ‘MP_OPTLOCK_VERSION_ORIGINAL‘ not found. Available parameters are [param1, et]]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/125480994</link><guid>https://blog.youkuaiyun.com/j59580/article/details/125480994</guid><author>j59580</author><pubDate>Mon, 27 Jun 2022 11:40:17 +0800</pubDate><description><![CDATA[mybatis plus  mybatis plus 新版乐观锁的问题解决]]></description><category></category></item><item><title><![CDATA[能注册到nacos 却读取不到相应的配置文件]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/123903293</link><guid>https://blog.youkuaiyun.com/j59580/article/details/123903293</guid><author>j59580</author><pubDate>Fri, 01 Apr 2022 17:42:57 +0800</pubDate><description><![CDATA[1、可能你只添加了这个依赖


&lt;dependency&gt;
    &lt;groupId&gt;com.alibaba.cloud&lt;/groupId&gt;
    &lt;artifactId&gt;spring-cloud-starter-alibaba-nacos-discovery&lt;/artifactId&gt;
&lt;/dependency&gt;

2、但是未添加以下依赖


&lt;dependency&gt;
    &lt;groupId&gt;com.aliba]]></description><category></category></item><item><title><![CDATA[xxl-job 集成nacos 的两种方式]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/123234698</link><guid>https://blog.youkuaiyun.com/j59580/article/details/123234698</guid><author>j59580</author><pubDate>Wed, 02 Mar 2022 18:08:14 +0800</pubDate><description><![CDATA[前言：

    百度了很久，看了很多博客，按照上面的来，都没能跑成功，最后根据各种异常去查询问题，根据问题说明，按照里面说的再去修改配置，折腾了不少时间，终于成功了，感谢！！


一、准备环境省略

二、xxl-job 源码下载

https://github.com/xuxueli/xxl-job.git

三、修改配置文件

1、方式一

1.1 xxl-job-admin 下的pom配置文件加入以下配置：


&lt;!-- 启用 nacos --&gt;
&lt;dependency&...]]></description><category></category></item><item><title><![CDATA[Linux 安装nfs共享文件资源]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/108005314</link><guid>https://blog.youkuaiyun.com/j59580/article/details/108005314</guid><author>j59580</author><pubDate>Tue, 18 Aug 2020 14:05:44 +0800</pubDate><description><![CDATA[1、服务器和客户端都需要安装


[root@iZ8vb409m8717ruqk6uowlZ ~]# yum -y install nfs-utils

2、创建共享目录


[root@iZ8vb409m8717ruqk6uowlZ ~]# mkdir app
[root@iZ8vb409m8717ruqk6uowlZ ~]# cd app
[root@iZ8vb409m8717ruqk6uowlZ app]# mkdir cdn    #共享目录
[root@iZ8vb409m8717ruqk6uowl]]></description><category></category></item><item><title><![CDATA[Nginx 添加 https 模块并配置 https]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/108001105</link><guid>https://blog.youkuaiyun.com/j59580/article/details/108001105</guid><author>j59580</author><pubDate>Fri, 14 Aug 2020 14:17:45 +0800</pubDate><description><![CDATA[1、没有安装Nginx，先去：安装Nginx，已安装Nginx请忽略第一步

2、去到你的nginx安装包解压目录下，安装ssl模块，也就是https模块


[root@iZ8vb409m8717ruqk6uowlZ ~]# cd /usr/local/nginx-1.16.1/
[root@iZ8vb409m8717ruqk6uowlZ nginx-1.16.1]# ./configure --with-http_stub_status_module --with-http_ssl_module    ]]></description><category></category></item><item><title><![CDATA[org.springframework.dao.DataIntegrityViolationException: Error attempting to get column ‘blood_press]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/107990887</link><guid>https://blog.youkuaiyun.com/j59580/article/details/107990887</guid><author>j59580</author><pubDate>Thu, 13 Aug 2020 20:41:41 +0800</pubDate><description><![CDATA[org.springframework.dao.DataIntegrityViolationException: Error attempting to get column 'blood_pressure_last_alert_time' from result set. Cause: java.sql.SQLDataException: Unsupported conversion from TIMESTAMP to java.lang.Integer
; Unsupported conversion.]]></description><category></category></item><item><title><![CDATA[Linux Centos 7 安装 SVN]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/107955790</link><guid>https://blog.youkuaiyun.com/j59580/article/details/107955790</guid><author>j59580</author><pubDate>Wed, 12 Aug 2020 18:02:19 +0800</pubDate><description><![CDATA[1、使用yun安装svn


[root@iZ8vb409m8717ruqk6uowlZ ~]# yum -y install subversion

2、创建目录和仓库


[root@iZ8vb409m8717ruqk6uowlZ ~]# mkdir /var/svnrepos    #创建目录
[root@iZ8vb409m8717ruqk6uowlZ ~]# svnadmin create /var/svnrepos/project    #创建仓库

3、修改svnserve.conf 文件
..]]></description><category></category></item><item><title><![CDATA[Linux Centos7 安装 Redis]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/107686130</link><guid>https://blog.youkuaiyun.com/j59580/article/details/107686130</guid><author>j59580</author><pubDate>Thu, 30 Jul 2020 13:52:01 +0800</pubDate><description><![CDATA[前言：可去官网，按照官网的安装，我的是稍微改了一下，官网地址：https://redis.io/download

1、下载Redis安装包


[root@iZ8vb409m8717ruqk6uowlZ ~]# cd /usr/local
[root@iZ8vb409m8717ruqk6uowlZ local]# wget http://download.redis.io/releases/redis-6.0.6.tar.gz

2、下载完成后进行解压并安装


[root@iZ8vb409m8717ru]]></description><category></category></item><item><title><![CDATA[Linux Centos7 停止、启动、重启MySQL的三种方式]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/107613274</link><guid>https://blog.youkuaiyun.com/j59580/article/details/107613274</guid><author>j59580</author><pubDate>Mon, 27 Jul 2020 15:58:36 +0800</pubDate><description><![CDATA[1、方法一


[root@iZ8vb409m8717ruqk6uowlZ ~]# service mysql stop    #停止
Shutting down MySQL..                                      [  OK  ]
[root@iZ8vb409m8717ruqk6uowlZ ~]# service mysql start    #启动
Starting MySQL.                                            ]]></description><category></category></item><item><title><![CDATA[Linux Centos7 开放端口]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/107612425</link><guid>https://blog.youkuaiyun.com/j59580/article/details/107612425</guid><author>j59580</author><pubDate>Mon, 27 Jul 2020 15:32:03 +0800</pubDate><description><![CDATA[1、检查防火墙是否有开启


[root@iZ8vb409m8717ruqk6uowlZ ~]# firewall-cmd --state
not running    #防火墙关闭状态


2、如果防火墙是关闭状态去开放端口会提示：FirewallD is not running


[root@iZ8vb409m8717ruqk6uowlZ ~]# firewall-cmd --zone=public --add-port=9090/tcp --permanent
FirewallD is not ru]]></description><category></category></item><item><title><![CDATA[Linux Centos7 安装 Nginx]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/107514323</link><guid>https://blog.youkuaiyun.com/j59580/article/details/107514323</guid><author>j59580</author><pubDate>Wed, 22 Jul 2020 15:58:05 +0800</pubDate><description><![CDATA[1、Nginx 下载链接

2、下载自己所需的Nginx版本，我以1.16.1为例



3、先安装gcc、pcre-devel、zlib-devel、openssl-devel


[root@iZ8vb409m8717ruqk6uowlZ ~]# yum -y install gcc pcre-devel zlib-devel openssl openssl-devel

4、使用Xftp 6上传下载的tar.gz包至刚创建的/usr/local目录下并解压


[root@iZ8vb409m87...]]></description><category></category></item><item><title><![CDATA[Linux Centos7 安装 JDK1.8]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/107510211</link><guid>https://blog.youkuaiyun.com/j59580/article/details/107510211</guid><author>j59580</author><pubDate>Wed, 22 Jul 2020 15:05:09 +0800</pubDate><description><![CDATA[手动安装jdk

1、jdk官网下载连接

2、下载tar.gz 包




]]></description><category></category></item><item><title><![CDATA[could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarExcept]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/89511983</link><guid>https://blog.youkuaiyun.com/j59580/article/details/89511983</guid><author>j59580</author><pubDate>Thu, 25 Apr 2019 11:13:02 +0800</pubDate><description><![CDATA[org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute statement
...]]></description><category></category></item><item><title><![CDATA[java.lang.ClassCastException: java.lang.Double cannot be cast to java.lang.Integer]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/89511385</link><guid>https://blog.youkuaiyun.com/j59580/article/details/89511385</guid><author>j59580</author><pubDate>Thu, 25 Apr 2019 11:02:26 +0800</pubDate><description><![CDATA[1、数据类型转换异常

2、如果是数值类型转换，大的数值类型转小的数值类型则必须强制转换；


double a = 11.02;
// 数据精度会丢失
int b = (int)a;

3、小的数值类型转大的数值类型则会进行自动转换，向上兼容；


int a = 100;
// 小的数值类型转大的数值，则自动转换，无需强制转换
double b = a;

4、如果是SQL查询报此异样：1.要...]]></description><category></category></item><item><title><![CDATA[javax.servlet.ServletException: File [&#47;admin&#47;integral&#47;getIntegralList.jsp] not found]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/89489972</link><guid>https://blog.youkuaiyun.com/j59580/article/details/89489972</guid><author>j59580</author><pubDate>Wed, 24 Apr 2019 12:00:20 +0800</pubDate><description><![CDATA[springMvc框架，action请求不返回页面，忘记在@RequestMapping("/integral/getIntegralList")下增加@ResponseBody注解，所以控制台显示异常，在@RequestMapping 下加上@ResponseBody注解即可
...]]></description><category></category></item><item><title><![CDATA[hibernate.hbm2ddl.auto 配置详解]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/89403234</link><guid>https://blog.youkuaiyun.com/j59580/article/details/89403234</guid><author>j59580</author><pubDate>Fri, 19 Apr 2019 16:36:21 +0800</pubDate><description><![CDATA[hibernate.cfg.xml 中hibernate.hbm2ddl.auto配置节点如下：
&lt;properties&gt;
&lt;property name="hibernate.show_sql" value="true" /&gt;
&lt;property name="hibernate.hbm2ddl.auto" value="create" /&gt;
&lt;...]]></description><category></category></item><item><title><![CDATA[js 格式化时间  年月日]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/89402619</link><guid>https://blog.youkuaiyun.com/j59580/article/details/89402619</guid><author>j59580</author><pubDate>Fri, 19 Apr 2019 16:14:43 +0800</pubDate><description><![CDATA[// 对Date的扩展，将 Date 转化为指定格式的String
// 月(M)、日(d)、小时(h)、分(m)、秒(s)、季度(q) 可以用 1-2 个占位符， 
// 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字) 
// 例子： 
// (new Date()).Format("yyyy-MM-dd hh:mm:ss.S") ==&gt; 200...]]></description><category></category></item><item><title><![CDATA[hibernate 的实体类某些字段与数据库不映射和映射自动更新数据库字段]]></title><link>https://blog.youkuaiyun.com/j59580/article/details/89402413</link><guid>https://blog.youkuaiyun.com/j59580/article/details/89402413</guid><author>j59580</author><pubDate>Fri, 19 Apr 2019 16:12:26 +0800</pubDate><description><![CDATA[如果实体类的某个字段不想映射数据库字段则在字段上加上@Transient注解即可


@Transient
private String company;

如果实体类增加了某个字段，忘记了修改数据库字段，则在配置文件加上以下配置即可


 &lt;property name="hibernateProperties"&gt;
			&lt;props&gt;
			    &lt;prop ke...]]></description><category></category></item></channel></rss>