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Code Ape Tech Column

Former Ant Group P8 engineer, pure technologist, sharing full‑stack Java, job interview and career advice through a column. Site: java-family.cn

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Latest from Code Ape Tech Column

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Code Ape Tech Column

Dec 19, 2025 · Backend Development

Boost SpringBoot Log Management: Step‑by‑Step Integration with Hera

This article explains why traditional SpringBoot logging falls short, introduces the Hera log platform’s three core benefits, outlines a layered integration architecture, and provides a detailed five‑step guide—including Maven dependencies, YAML configuration, custom field providers, log output, traceability, and console usage—plus performance, high‑availability, security tips and common pitfalls.

HeraLog ManagementSpringBoot

0 likes · 14 min read

Boost SpringBoot Log Management: Step‑by‑Step Integration with Hera

Code Ape Tech Column

Dec 18, 2025 · Backend Development

How to Co‑exist Multiple DataSources in Spring Without Switching?

This guide explains the concept of multi‑DataSource coexistence, when it is appropriate, step‑by‑step configuration for MySQL and TDengine, transaction manager handling, custom annotations, mapper scanning, differences from dynamic routing, common pitfalls, and best‑practice usage in a Spring‑MyBatis backend.

JavaMulti-DataSourceMyBatis

0 likes · 13 min read

How to Co‑exist Multiple DataSources in Spring Without Switching?

Code Ape Tech Column

Dec 8, 2025 · Operations

Master Log Searching with grep, tail, and less: Real‑World Tips for Developers

This guide walks you through practical command‑line techniques—using grep, tail, less, and related options—to efficiently locate Java exceptions in log files, view surrounding context, monitor live logs, search compressed archives, and quickly count occurrences, all without opening files manually.

command linedebugginggrep

0 likes · 6 min read

Master Log Searching with grep, tail, and less: Real‑World Tips for Developers

Code Ape Tech Column

Dec 5, 2025 · Big Data

Optimizing 100K Record Retrieval from 10M‑Row Pools: ClickHouse, ES Scroll, ES+HBase, RediSearch

This article examines several engineering solutions for extracting up to 100,000 records from a ten‑million‑row pool, comparing multi‑threaded ClickHouse pagination, Elasticsearch scroll‑scan, an ES‑plus‑HBase hybrid, and RediSearch + RedisJSON, and presents performance measurements and practical trade‑offs.

Big DataClickHouseElasticsearch

0 likes · 12 min read

Optimizing 100K Record Retrieval from 10M‑Row Pools: ClickHouse, ES Scroll, ES+HBase, RediSearch

Code Ape Tech Column

Dec 4, 2025 · Backend Development

How JSON Schema Eliminates Duplicate Form Validation in SpringBoot

This article explains how using JSON Schema as a single source of truth can drive both front‑end rendering and back‑end validation in Java SpringBoot applications, eliminating duplicated validation logic, reducing maintenance costs, and enabling dynamic, versioned forms with real‑time user feedback.

Form ValidationJSON SchemaSpringBoot

0 likes · 12 min read

How JSON Schema Eliminates Duplicate Form Validation in SpringBoot

Code Ape Tech Column

Dec 1, 2025 · Backend Development

How to Auto‑Encrypt Sensitive Fields in Spring Boot with MyBatis Using Annotations

This article explains a Spring Boot and MyBatis solution that automatically encrypts and decrypts sensitive database fields via an @Encrypted annotation, eliminating manual cryptographic code, reducing maintenance overhead, and preserving performance while ensuring strong data protection.

AnnotationDatabase SecurityJava

0 likes · 10 min read

How to Auto‑Encrypt Sensitive Fields in Spring Boot with MyBatis Using Annotations

Code Ape Tech Column

Nov 22, 2025 · Backend Development

What’s New in Spring Boot 4? A Deep Dive into the Latest Spring Ecosystem Overhaul

Spring Boot 4 launches alongside Spring Framework 7, Spring Data 2025.1 and Spring AI 1.1, introducing Jakarta EE 11, JSpecify null‑safety, build‑time optimizations with Project Leyden, a declarative HTTP client, Jackson 3 support, native API versioning, integrated OpenTelemetry, and a dual‑track AI strategy.

AIJakarta EEJava

0 likes · 8 min read

What’s New in Spring Boot 4? A Deep Dive into the Latest Spring Ecosystem Overhaul

Code Ape Tech Column

Nov 20, 2025 · Backend Development

Build a Millisecond‑Scale Sensitive Word Filter with DFA and Trie in Java

This article explains why traditional string matching and regex struggle with large keyword sets, introduces a DFA‑based solution using a Trie tree for linear‑time detection, provides full Java implementations, shows real‑world integration scenarios, and explores advanced optimizations such as double‑array tries, Aho‑Corasick automata, and sharding with Bloom filters.

DFAJavaSensitive Word Filtering

0 likes · 17 min read

Build a Millisecond‑Scale Sensitive Word Filter with DFA and Trie in Java

Code Ape Tech Column

Nov 11, 2025 · Backend Development

Pass User Info from Filter to Controller via Spring MVC Argument Resolver

This article explains how to transfer the current user ID extracted from a JWT token in a filter to Spring MVC controller methods using a custom HandlerMethodArgumentResolver, highlighting drawbacks of ThreadLocal and request attributes, and demonstrating a type‑safe, extensible solution with code examples.

HandlerMethodArgumentResolverJavaSpring MVC

0 likes · 11 min read

Pass User Info from Filter to Controller via Spring MVC Argument Resolver

Code Ape Tech Column

Nov 10, 2025 · Databases

How to Quickly Identify and Optimize MySQL Slow Queries

This guide explains how to enable MySQL slow‑query logging, set appropriate thresholds, locate problematic SQL statements, analyze execution plans with EXPLAIN, and apply index or query rewrites to dramatically improve performance.

EXPLAINMySQLSQL optimization

0 likes · 10 min read

How to Quickly Identify and Optimize MySQL Slow Queries