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Links to the original text: https://my.oschina.net/zipu888/blog/549762 General Function and Module Customization System (cfcmms) - 023 Custom grid Column (7 Submodule Records) ...

Links to the original text: https://www.jianshu.com/p/ceb1df475021 Preface: Mybatis is still popular in the persistence layer framework, and most projects are based on ssm. Although mybatis can operate database directly in xml through S ...

I recently received a task, to climb a data, the data in a web page table, the amount of data hundreds. Open debugging mode and find that the interface returns an html page, as long as it is treated as string. (xpath crawler is troublesome for parsing html files) The scheme uses regular matching of all cell rows and extracting cell content, whi ...

Preface Recently, when Baidu wants to learn Spark's newer Structured Streaming, all of them are monotonous wordcount s, which are quite speechless.You have to figure out for yourself what you can do with the Select and Filter operations of the Dataframe.Because of using Python, using Pandas, and trying to turn Pandas to process, readStream doe ...

Links to the original text: https://www.mk2048.com/blog/blog.php?id=ic00hjiib&title=java-%E7%BB%93%E5%AF%B9%E7%BC%96%E7%A8%8B%EF%BC%9A%E5%88%86%E6%95%B0%E6%95%B4%E6%95%B0%EF%BC%8C%E8%BF%90%E7%AE%97%E7%AC%A6%E4%B8%AA%E6%95%B0%EF%BC%8C%E8%BF%90%E7%AE%97%E8%8C%83%E5%9B%B4%EF%BC%8C%E5%8 ...

brief introduction Dependency injection is mainly a structural model, focusing on the structure between classes. Its purpose is to achieve the principle of minimum knowledge and composite reuse in design principles, reduce internal dependency, perform a single responsibility, and ultimately strong decoupling. The best implementation of Depen ...

Author: Hong Bin background When backup tools such as xtrabackup are used for backup, there will be global lock. Normally, lock occupancy time is very short, but occasionally long lock occupancy will lead to system write blocking. The phenomenon is that show process list sees many sessions showing wait global read lock, which may have a great ...

Preface Integrating Mybtis is very simple for Spring Boot. Through this article, you can get started quickly without pressure, but before I start, I want to talk about my version information: maven 3.2.5 jdk 1.8 Spring Boot 2.1.6 Create a project The automated configuration of idea is still used, but here we need to check the following depen ...

Monitoring tool DPA found a DB Commit Time indicator alarm on an Oracle database server overseas, which exceeded the red alarm line (about 40 milliseconds, yellow alarm 10 milliseconds, red alarm line 20 milliseconds). As shown in the following screenshot, the AWR report for the corresponding period was generated, and log file sync waited insid ...

tail-30/data/mysql/localhost.localdomain.err (log file path depends on the situation), ----------------------------------------- 161108 11:36:45 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/var 2017-08-15 11:3 ...