fix:java项目性能优化

README.md

@@ -9,9 +9,44 @@ This server implements all BrAPI calls. It is backed by a custom database with d
 Use [/calls](https://test-server.brapi.org/brapi/v1/call) (V1) or [/serverinfo](https://test-server.brapi.org/brapi/v2/serverinfo) (V2) to check the available endpoints.
 
 ## Prerequisites
-* Maven 3.9
-* Java 21
-* Postgres 17.2
+
+| Tool | Required version | Notes |
+| --- | --- | --- |
+| **Java (JDK)** | **21** (class file 65.0) | Compile **and** run must use JDK 21. Java 17 will fail at startup. |
+| **Maven** | **3.9.9+** | Used to build and run the backend. |
+| **PostgreSQL** | **17.2** | Empty schema; tables/data load on first startup. |
+
+This repo ships pinned tooling under `.tools/` (Windows-friendly):
+
+- JDK: `.tools/jdk-21.0.11+10` (Temurin 21.0.11)
+- Maven: `.tools/apache-maven-3.9.9`
+
+**PowerShell** (set env before `mvn`; do not use CMD `set` syntax in PowerShell):
+
+```powershell
+$env:JAVA_HOME = "D:\maimaiproject\brapi-java\.tools\jdk-21.0.11+10"
+$env:Path = "$env:JAVA_HOME\bin;" + $env:Path
+java -version   # should show 21.0.11
+mvn -version    # Java version should also be 21
+```
+
+**CMD**:
+
+```cmd
+set JAVA_HOME=D:\maimaiproject\brapi-java\.tools\jdk-21.0.11+10
+set Path=%JAVA_HOME%\bin;%Path%
+```
+
+Or use the bundled Maven directly:
+
+```powershell
+$env:JAVA_HOME = "D:\maimaiproject\brapi-java\.tools\jdk-21.0.11+10"
+$env:Path = "$env:JAVA_HOME\bin;" + $env:Path
+.\.tools\apache-maven-3.9.9\bin\mvn.cmd clean install
+.\.tools\apache-maven-3.9.9\bin\mvn.cmd spring-boot:run
+```
+
+Adjust the path if your checkout is not `D:\maimaiproject\brapi-java`.
 
 ## Auth Configuration
 BrAPI has provided a [sample central authentication service for the test server](https://brapi.org/oauth).