LangInteger

Since joining one of the most renowned technology companies in 2021, my journey has been a whirlwind of challenges and triumphs. While it’s an honor to work for such a prestigious organization, I soon discovered that it came with a price. In this article, I want to share with you the up and downs of my adventure.

接触 PlantUML 好一阵子了，一直以来也经常向周围的朋友安利。每次都会丢出去一堆链接和教程，于是想着整理整理,这样下次再安利的时候就直接把博客甩出去就好，便有了这篇手摸手教程，讲一讲日常工作中使用 PlantUML 的方法。PlantUML 基础语法相关内容在本文中先按下不表，大家可以自行前往官网或者 REAL WORLD PlantUML 学习。

This Stackoverflow Topic
comes up with two questions.

• Q1: how to distinguish exceptions between
  • data binding when conversion http request body to object
  • customized validation defined as annotation on that object
• Q2: how to display valuable information when data binding fails

There are embarassing situations when developing a mono project with multiple environments.

Like git for code repository, flyway aims to take version control to database. This article introduces how to use flyway in a spring boot project environment with existing dataset.

• 本文分析基于 JDK 11
• Picture from iOS Tech Set

读 Concurrent Patterns and Best Practices，遇到两篇参考文章

• 写于 2001 年的 Double-checked locking: Clever, but broken，对 DCL 实现懒加载单例模式存在的问题进行了深刻的探讨，同时阐述了 synchronize 关键字的作用
• 写于 2018 年的博客 Java Volatile Keyword，详细阐述了 volatile 关键字的作用

一番阅读之后，撰写此文备忘。

百度/必应/谷歌一下，使用 Java 生成 PDF 文档的常用工具为

• iText

但是最新的 iText7 使用 AGPL 协议，需要购买 license 才能够合理合法的在商业项目中使用。本着省钱的原则，使用 iText5 进行开发。