JDK8 升级至 JDK21 与 Spring Cloud 版本迁移

升级效果

内存占用率降低 50%，启动速度提升 40%。

升级清单

• Spring Boot: 3.5.5
• Spring Cloud: 2025.0.0 和 4.3.0
• Spring Cloud Alibaba: 2023.0.3.3
• Knife4j: 4.5.0
• MyBatis Plus Boot Starter: 3.5.14
• MyBatis Spring: 3.0.5
• Servlet API: javax 改为 jakarta

依赖配置

<!-- 依赖版本管理 -->
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<maven.compiler.source>21</maven.compiler.source>
<maven.compiler.target>21</maven.compiler.target>
<skipTests>true</skipTests>
<!-- custom variable -->
<profile.env>local</profile.env>
<!-- Dependency version -->
<spring.boot.version>3.5.5</spring.boot.version>
<nacos.version>2.2.3</nacos.version>
<lombok.version>1.18.30</lombok.version>
<slf4j.version>2.0.17</>
5.8.24
3.8


2025.0.0
2023.0.3.3
4.5.0
5.5
1.2.27
3.5.14
2.2.41
2.20.0
1.6.3
2.2.0
5.12.2
5.12.2

13.0.2
2.9.3
1.10.0
3.3.0

3.5.5
3.6.0
3.1.0
3.3.0
3.0.2
2.22.1
2.5.2
2.8.2
3.1.1
1.4.13
0.11.0
2.2.6
1.7
2.6.4
8.11.0
3.0.5





org.springframework.boot
spring-boot-dependencies
${spring.boot.version}
pom
import


com.alibaba.cloud
spring-cloud-alibaba-dependencies
${spring-cloud-alibaba-dependencies.version}
pom
import


org.springframework.cloud
spring-cloud-dependencies
${spring-cloud-dependencies.version}
pom
import


org.springframework.cloud
spring-cloud-starter-openfeign
4.3.0


org.springframework.cloud