<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[J_com的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/J_com</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; J_com]]></copyright><item><title><![CDATA[u-textarea 自适应高度后输入框显示框小解决方案]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/138846913</link><guid>https://blog.youkuaiyun.com/J_com/article/details/138846913</guid><author>J_com</author><pubDate>Tue, 14 May 2024 11:22:04 +0800</pubDate><description><![CDATA[在设置自适应高度autoHeight 后显示输入框小。直接定义class属性，定义最小高度。]]></description><category></category></item><item><title><![CDATA[uview Collapse折叠面板无法动态设置展开问题]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/138667272</link><guid>https://blog.youkuaiyun.com/J_com/article/details/138667272</guid><author>J_com</author><pubDate>Fri, 10 May 2024 15:17:56 +0800</pubDate><description><![CDATA[uView 折叠面板无法动态展开问题]]></description><category></category></item><item><title><![CDATA[MYSQL 5.7 bat脚本备份报[Warning] Using a password on the command line interface can be insecure]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/132743378</link><guid>https://blog.youkuaiyun.com/J_com/article/details/132743378</guid><author>J_com</author><pubDate>Thu, 07 Sep 2023 18:05:10 +0800</pubDate><description><![CDATA[MYSQL 5.7 本地备份报错[Warning] Using a password on the command line interface can be insecure。]]></description><category></category></item><item><title><![CDATA[Swagger API 信息泄露漏洞解决方案]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/129197536</link><guid>https://blog.youkuaiyun.com/J_com/article/details/129197536</guid><author>J_com</author><pubDate>Fri, 24 Feb 2023 11:36:17 +0800</pubDate><description><![CDATA[Swagger API 信息泄露漏洞解决方案]]></description><category></category></item><item><title><![CDATA[Alibaba Druid 未授权访问解决方案]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/129197256</link><guid>https://blog.youkuaiyun.com/J_com/article/details/129197256</guid><author>J_com</author><pubDate>Fri, 24 Feb 2023 11:28:19 +0800</pubDate><description><![CDATA[Alibaba Druid 未授权访问解决方案]]></description><category></category></item><item><title><![CDATA[@Scheduled定时重复执行两次]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/125740100</link><guid>https://blog.youkuaiyun.com/J_com/article/details/125740100</guid><author>J_com</author><pubDate>Tue, 12 Jul 2022 11:53:27 +0800</pubDate><description><![CDATA[@Scheduled重复执行]]></description><category></category></item><item><title><![CDATA[mybatisplus：该模式不能应用于非数据库字段!]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/125283886</link><guid>https://blog.youkuaiyun.com/J_com/article/details/125283886</guid><author>J_com</author><pubDate>Tue, 14 Jun 2022 18:36:40 +0800</pubDate><description><![CDATA[com.baomidou.mybatisplus.core.exceptions.MybatisPlusException: 该模式不能应用于非数据库字段!]]></description><category></category></item><item><title><![CDATA[mysql 时间格式转换]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/124704680</link><guid>https://blog.youkuaiyun.com/J_com/article/details/124704680</guid><author>J_com</author><pubDate>Wed, 11 May 2022 10:43:59 +0800</pubDate><description><![CDATA[mysql
时间转字符串
DATE_FORMAT(date,'%Y-%m-%d %H:%i:%s')

获取当前时间
now() 
CURRENT_TIMESTAMP()
CURRENT_TIMESTAMP

时间加减间隔函数
-- date 是指定的日期 INTERVAL 为关键词 expr 是具体的时间间隔 type 是时间单位
DATE_ADD(date,INTERVAL expr type)
DATE_SUB(date,INTERVAL expr type)

两个时间的相减
-- 减去两个日期，比]]></description><category></category></item><item><title><![CDATA[Spring Boot 内置工具类]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/124688310</link><guid>https://blog.youkuaiyun.com/J_com/article/details/124688310</guid><author>J_com</author><pubDate>Tue, 10 May 2022 15:10:52 +0800</pubDate><description><![CDATA[断言是一个逻辑判断，用于检查不应该发生的情况
Assert 关键字在 JDK1.4 中引入，可通过 JVM 参数-enableassertions开启
ringBoot 中提供了 Assert 断言工具类，通常用于数据合法性检查// 要求参数 object 必须为非空（Not Null），否则抛出异常，不予放行

// 参数 message 参数用于定制异常信息。
void notNull(Object object, String message)
// 要求参数必须空（Null），否则抛出异常，不予『.]]></description><category></category></item><item><title><![CDATA[mysql使用mybatisplus自增长id无效的问题]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/121992067</link><guid>https://blog.youkuaiyun.com/J_com/article/details/121992067</guid><author>J_com</author><pubDate>Fri, 17 Dec 2021 11:18:29 +0800</pubDate><description><![CDATA[异常
在实体类中加入@TableId(type= IdType.AUTO)注解后，本应该按照数据库自增长id7，但是得到的确是1471670686374723691，原因是使用MybatisPlus的insert()方法插入导致自增id值变大导致自增长时根据新的增长值增长
解决方法：
在表中设计表，查看表自增长值，修改值保存，再次运行新增方法就可以了


...]]></description><category></category></item><item><title><![CDATA[nginx代理配置]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/121794649</link><guid>https://blog.youkuaiyun.com/J_com/article/details/121794649</guid><author>J_com</author><pubDate>Wed, 08 Dec 2021 16:45:21 +0800</pubDate><description><![CDATA[最简反向代理配置

upstream my_server {                                                         
    server 10.0.0.2:8080;                                                
    keepalive 2000; 
}
server {
    listen       80;                                         .]]></description><category></category></item><item><title><![CDATA[Map转换实体类生成LambdaQueryWrapper（包含条件构造器）]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/121384024</link><guid>https://blog.youkuaiyun.com/J_com/article/details/121384024</guid><author>J_com</author><pubDate>Wed, 17 Nov 2021 17:59:32 +0800</pubDate><description><![CDATA[// 将 Map 转换为 实体类
        ScmAppointment scmAppointment = JSON.parseObject(JSON.toJSONString(params), ScmAppointment.class);
        // 根据实体类创建
        new QueryWrapper(scmAppointment ).lambda();
        // 直接new LambdaQueryWrapper
        LambdaQue...]]></description><category></category></item><item><title><![CDATA[itext PdfPCell单元格隐藏边设置]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/121376635</link><guid>https://blog.youkuaiyun.com/J_com/article/details/121376635</guid><author>J_com</author><pubDate>Wed, 17 Nov 2021 13:59:58 +0800</pubDate><description><![CDATA[链接地址

]]></description><category></category></item><item><title><![CDATA[帆软计算扩展列某两列相除]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/121284945</link><guid>https://blog.youkuaiyun.com/J_com/article/details/121284945</guid><author>J_com</author><pubDate>Fri, 12 Nov 2021 11:50:28 +0800</pubDate><description><![CDATA[帆软绝对层次坐标计算某扩展列的值
根据月份纵向扩展并计算最近一年和上一年的比
绝对层次
针对图片展示计算M1卡数量比率插入公式：((c4[b4:-1])-(c4[b4:-2]))/(c4[b4:-2])（计算c4列倒数第一列与倒数第二列的值：c4倒数第一列数值-c4倒数第二列数值/c4倒数第二列数值）需要注意的是，参照的列需为与数值列同位数的列，不然会把所有列的数值获取到




属性
说明




c4
需要获取的数据列


b4
参照数据列


-1
倒数第1位


-2
倒数第2位


c4[b4:-]]></description><category></category></item><item><title><![CDATA[avue crud操作按钮页面打开前回调]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/121146809</link><guid>https://blog.youkuaiyun.com/J_com/article/details/121146809</guid><author>J_com</author><pubDate>Thu, 04 Nov 2021 17:15:08 +0800</pubDate><description><![CDATA[&lt;avue-crud :option="modulesOption" :before-open="beforeOpen" :data="modulesData" v-model="modulesForm" ref="crud"
            @row-update="modulesRowUpdate"&gt;
   &lt;template slot-scope="{row,index}" slot="menu"&gt;
     &lt;el-button type="primary" s]]></description><category></category></item><item><title><![CDATA[MyBatisPlus中使用 @TableField完成字段自动填充]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/121032560</link><guid>https://blog.youkuaiyun.com/J_com/article/details/121032560</guid><author>J_com</author><pubDate>Fri, 29 Oct 2021 13:27:46 +0800</pubDate><description><![CDATA[本意是为了自动填充创建时间以及编辑时间，查看个网上的文档之后写上去竟然无效（不是文档有问题，而是我理解错误）


根据网上的介绍添加jar包

&lt;dependency&gt;
    &lt;groupId&gt;com.baomidou&lt;/groupId&gt;
    &lt;artifactId&gt;mybatis-plus-boot-starter&lt;/artifactId&gt;
    &lt;version&gt;3.1.1&lt;/version&gt;
&lt;/dep.]]></description><category></category></item><item><title><![CDATA[IDEA 项目结构旁边出现 0%classes,0% lines covered]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/120947412</link><guid>https://blog.youkuaiyun.com/J_com/article/details/120947412</guid><author>J_com</author><pubDate>Mon, 25 Oct 2021 10:29:21 +0800</pubDate><description><![CDATA[IDEA 项目结构旁边出现 0%classes,0% lines covered


]]></description><category></category></item><item><title><![CDATA[Caused by java.time.zone.ZoneRulesException Unknown time-zone ID CTT]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/120946664</link><guid>https://blog.youkuaiyun.com/J_com/article/details/120946664</guid><author>J_com</author><pubDate>Mon, 25 Oct 2021 09:58:20 +0800</pubDate><description><![CDATA[Caused by java.time.zone.ZoneRulesException Unknown time-zone ID CTT
高版本的MySQL已经不需要填写serverTimezone=CTT，去掉就可以了！

]]></description><category></category></item><item><title><![CDATA[springboot 启动报错(Failed to configure a DataSource: ‘url‘ attribute is not specified and no embedded )]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/120946519</link><guid>https://blog.youkuaiyun.com/J_com/article/details/120946519</guid><author>J_com</author><pubDate>Mon, 25 Oct 2021 09:56:26 +0800</pubDate><description><![CDATA[springboot 启动报错
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
09:49:59 [main] ERROR o.s.b.d.LoggingFailureAnalysisReporter - 

***************************
APPLICATION FAILED TO START
*****]]></description><category></category></item><item><title><![CDATA[Cron表达式]]></title><link>https://blog.youkuaiyun.com/J_com/article/details/120333836</link><guid>https://blog.youkuaiyun.com/J_com/article/details/120333836</guid><author>J_com</author><pubDate>Thu, 16 Sep 2021 17:29:39 +0800</pubDate><description><![CDATA[在线生成定时表达式

无意间发现了一个在线的定时表达式生成器，分享出来，再也不用每次百度了 https://cron.qqe2.com/


]]></description><category></category></item></channel></rss>