运行 "mvn clean javadoc:jar package" 上的错误 "the JAVA_HOME environment variable is not defined correctly"

Question

当我尝试执行命令时

mvn clean javadoc:jar package

显示

the JAVA_HOME environment variable is not defined correctly. This environment variable is needed to run this program.

NB: JAVA_HOME should point to a JDK, not a JRE.

我查看了已经提出的问题Unable to find javadoc command - maven，我上面尝试的解决方案仅取自此解决方案。我是 Ubuntu 的新手。我该如何解决这个问题？

而当我运行 echo $JAVA_HOME 它打印：

/usr/lib/jvm/java-11-openjdk-amd64

我还尝试将 JAVA_HOME 设置为：

/etc/launchd.conf/java-11-openjdk-amd64
/usr/libexec/java-11-openjdk-amd64
/usr/libexec/java-11-openjdk-amd64/

当我运行 mvn -v 时，它打印：

Apache Maven 3.6.3
Maven home: /usr/share/maven
Java version: 11.0.10, vendor: Ubuntu, runtime: /usr/lib/jvm/java-11-openjdk-amd64
Default locale: en_IN, platform encoding: UTF-8
OS name: "linux", version: "5.8.0-45-generic", arch: "amd64", family: "unix"

当我运行 echo $JAVA_HOME 它打印：

/usr/lib/jvm/java-11-openjdk-amd64

Answer 1

我会删除 with pattern openjdk-11-.* (see this question) and install Java 。

Answer 2

嗯...，可能运行 javadoc 的文件不存在。文件 /usr/lib/jvm/java-11-openjdk-amd64/bin/javadoc 是否存在？

请尝试：

sudo apt install openjdk-11-jdk

Answer 3

在我的 Mac（大苏尔）上，我遇到了同样的问题。看完这篇 article ;此命令适用于我的环境：

export JAVA_HOME=$(/usr/libexec/java_home)

运行 "mvn clean javadoc:jar package" 上的错误 "the JAVA_HOME environment variable is not defined correctly"

Error "the JAVA_HOME environment variable is not defined correctly" on running "mvn clean javadoc:jar package"

java

ubuntu

javadoc

maven

maven-javadoc-plugin