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jojoldu/blog-code
http://jojoldu.tistory.com/ 에서 제공하는 예제 code
A companion code repository for jojoldu's Korean tech blog, covering Java, Spring Boot, JPA, Spring Batch, and related tooling through worked examples. The audience is Korean-speaking Java/Spring developers looking for practical code that matches specific blog posts. It is not a library or framework — it is a reference collection.
The Spring Batch examples are unusually good: paging gotchas, lazy-loading exceptions in processors, passing List to ItemWriter, and @StepScope misuse are exactly the kind of issues that only surface in production. The JPA content hits real pain points too — N+1, mass-delete performance, and GeneratedValue behavior changes in Boot 2.0. The repo has been pushed to as recently as yesterday, so it has not been abandoned despite being years old. The CTO retrospective essays (2021–2025) are a bonus if you want candid writing from someone who ran engineering at a Korean startup through real growth.
Nearly all documentation is in Korean — code comments, directory names, and READMEs — so readers who don't read Korean will get the code but miss the explanation that makes the examples useful. The repo mixes runnable Spring Boot projects with prose essays (회고) in the same tree, making navigation awkward and the directory listing misleading about what is actually code. Some examples target Spring Boot 1.4 and older JPA behaviors that are no longer accurate; there is no clear signal at the file level about which examples are stale. There is no root-level build file or setup guide, so you have to find the right subdirectory yourself before anything runs.