hellyguohellyguo/self-ai-spec/skills/java-env/SKILL.md

java-env

Skill8 starsChanged 16 days agoApache-2.0View on GitHub

提供本机 Java 开发环境信息：JDK、mvnd/mvn 路径与版本、环境变量与别名。适用于编译、运行、性能分析前确认 Java 环境。

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SKILL.md

Java 环境信息

本机 Java 工具链的查找路径与版本切换方式。工具路径为机器事实，迁移到其他机器时以实际探测结果为准。

JDK 查找路径

范围	路径	说明
系统	`/usr/lib/jvm`	系统安装的多个 JDK
用户	`${HOME}/lang`	用户自装的多个 JDK

构建工具路径

工具	路径	优先级
mvnd	`${HOME}/app/maven-mvnd`	首选
mvn	`${HOME}/app/apache-maven`	次选

环境确认

# 加载 shell 配置以获取 alias 与 JAVA_HOME
source ~/.bashrc

# 查看 Java 相关环境变量
env | grep JAVA

# 查看 Java 相关 alias
alias | grep java

# 查看可用 JDK
ls /usr/lib/jvm
ls "${HOME}/lang"

版本选择原则

以项目 pom.xml 的 maven.compiler.*、java.version 或 toolchain 配置为准选择 JDK。
构建优先使用 mvnd，mvnd 不可用时回退 mvn。
同一任务内不得混用不同 JDK 版本；编译、测试、性能分析必须使用同一版本。

版本切换别名

以下别名依赖预先导出的 JAVA_HOME* 与 NOJAVA_HOME_PATH：

java7='JAVA_HOME=$JAVA_HOME7 PATH=$JAVA_HOME7/bin:$NOJAVA_HOME_PATH java'
java8='JAVA_HOME=$JAVA_HOME8 PATH=$JAVA_HOME8/bin:$NOJAVA_HOME_PATH java'
java11='JAVA_HOME=$JAVA_HOME11 PATH=$JAVA_HOME11/bin:$NOJAVA_HOME_PATH java'
java17='JAVA_HOME=$JAVA_HOME17 PATH=$JAVA_HOME17/bin:$NOJAVA_HOME_PATH java'
java21='JAVA_HOME=$JAVA_HOME21 PATH=$JAVA_HOME21/bin:$NOJAVA_HOME_PATH java'
java23='JAVA_HOME=$JAVA_HOME23 PATH=$JAVA_HOME23/bin:$NOJAVA_HOME_PATH java'
java25='JAVA_HOME=$JAVA_HOME25 PATH=$JAVA_HOME25/bin:$NOJAVA_HOME_PATH java'

诊断与分析工具路径

工具路径为机器事实，迁移到其他环境时以实际探测结果为准。

工具	路径	用途
SpotBugs	`${HOME}/app/spotbugs`	字节码缺陷扫描
PMD	`${HOME}/app/pmd`	源码规范扫描
Arthas	`${HOME}/app/arthas`	运行时诊断与挂载分析
async-profiler	`${HOME}/app/async-profiler`	CPU/内存采样与火焰图
aspfit / aspfitn / aspflist	`${HOME}/bin/`	按 PID/进程名采样、列出支持的采集模式
jitwatch	`${HOME}/app/jitwatch`	JIT 编译分析
jarScanMax325	`${HOME}/bin/jarScanMax325`	扫描超过 325 字节、无法被 JIT 内联的方法
hprof-slurp / jhh	`${HOME}/.cargo/bin/`	堆转储解析，命令行方式，速度快于 GUI

验证

java -version、mvnd -version、mvn -version 均可正常输出。
JAVA_HOME 指向的版本与项目要求一致。
别名切换后 which java 指向目标 JDK。

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