项目优化，构建文件Lombok异常问题修复

system-dynamic-datasource/CLAUDE.md

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+# CLAUDE.md - system-dynamic-datasource
+
+This file provides guidance to Claude Code when working in the system-dynamic-datasource module.
+
+## Purpose
+
+Provides dynamic multi-datasource switching at runtime using Spring's `AbstractRoutingDataSource`. This module has no main class and is not runnable on its own.
+
+## Architecture
+
+```
+@DataSource (annotation)
+    ↓ triggers
+DataSourceAspect (AOP around advice)
+    ↓ sets/clears
+DynamicContextHolder (ThreadLocal<Deque<String>>)
+    ↓ peek() returns key to
+DynamicDataSource (extends AbstractRoutingDataSource)
+    ↓ routes to
+Multiple DataSources (configured in DynamicDataSourceProperties)
+```
+
+## Key Classes
+
+### `@DataSource` annotation
+
+Apply to methods or classes to specify which datasource to use. Takes a datasource name string.
+
+### `DataSourceAspect`
+
+AOP aspect that intercepts `@DataSource`-annotated methods. Before invocation, pushes the datasource name onto `DynamicContextHolder`. After invocation (finally block), pops it back off.
+
+### `DynamicContextHolder`
+
+Thread-safe holder using `ThreadLocal<Deque<String>>`. Uses a deque (stack) to support nested `@DataSource` calls -- each method restores the previous datasource on exit.
+- `push(String ds)` -- set current datasource
+- `poll()` -- restore previous
+- `peek()` -- get current (used by DynamicDataSource)
+
+### `DynamicDataSource extends AbstractRoutingDataSource`
+
+`determineCurrentLookupKey()` returns `DynamicContextHolder.peek()`. If the holder is empty, falls back to the default datasource.
+
+### `DynamicDataSourceFactory`
+
+Creates Druid datasource instances from configuration properties.
+
+### Configuration Properties
+
+`DynamicDataSourceProperties`: Maps to YAML `spring.datasource.dynamic.*` with multiple named datasource configs.
+`DataSourceProperties`: Individual datasource config (url, username, password, driver-class-name, etc.).
+
+## Usage
+
+```java
+@Service
+public class SomeService {
+    @DataSource("oracle")
+    public List<Data> queryFromOracle() {
+        // queries run against the "oracle" datasource
+    }
+}
+```
+
+When no `@DataSource` is present, queries use the default (primary) datasource configured in `application-*.yml`.