This article demonstrates how to use the H2 database with Java 1.8, covering embedded (file and memory) modes, server modes (Web, TCP, PG), mixed mode configurations, required dependencies, and provides complete JUnit test code examples for creating, accessing, and managing tables.
A developer recounts how a newly written SpringBoot unit test unintentionally deleted all data in the test database, explores the root causes—including H2 configuration, automatic SQL script execution, and permission issues—and shares concrete steps to prevent similar disasters.
This guide walks through setting up GraalVM on Ubuntu, configuring environment variables, handling native-image agent pitfalls, fixing H2 database class‑loading issues, and finally producing a compact native executable for a Solon‑based Java service with memory‑optimisation tips.
This article explains the lightweight features of the pure‑Java H2 embedded database, demonstrates its various modes—including in‑memory, file‑based, and standalone server—and provides step‑by‑step integration with SpringBoot and MyBatis for rapid development and testing.
This article explains Youzan’s layered unit‑testing framework for microservice applications, outlines typical pain points such as massive test‑case rewrites, unstable test data, and missing result verification, and demonstrates how tools like DbUnit, H2, springockito, spring‑test and PowerMock are combined to provide data preparation, mock injection, automatic cleanup, and declarative result checks.
