Log4j2/Slf4j 和 Java 11

Question

我目前正在尝试使用 log4j/slf4j 和 java 11 构建一个应用程序，但我在运行时遇到了这个问题：

2018-12-10 22:09:27,225 main INFO Cannot initialize scripting support because this JRE does not support it. java.lang.NoClassDefFoundError: javax/script/ScriptEngineManager
    at org.apache.logging.log4j.core@2.11.1/org.apache.logging.log4j.core.script.ScriptManager.<init>(ScriptManager.java:69)
    at org.apache.logging.log4j.core@2.11.1/org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:216)
    at org.apache.logging.log4j.core@2.11.1/org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:250)
    at org.apache.logging.log4j.core@2.11.1/org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:547)
    at org.apache.logging.log4j.core@2.11.1/org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:619)
    at org.apache.logging.log4j.core@2.11.1/org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:636)
    at org.apache.logging.log4j.core@2.11.1/org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:231)
    at org.apache.logging.log4j.core@2.11.1/org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:153)
    at org.apache.logging.log4j.core@2.11.1/org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
    at org.apache.logging.log4j/org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
    at org.apache.logging.log4j/org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:121)
    at org.apache.logging.log4j.slf4j@2.11.1/org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:49)
    at org.apache.logging.log4j/org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:46)
    at org.apache.logging.log4j.slf4j@2.11.1/org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:29)
    at org.slf4j/org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:355)
    at org.slf4j/org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:380)
    at fr.mrcraftcod.nameascreated/fr.mrcraftcod.nameascreated.NameAsCreated.<clinit>(NameAsCreated.java:39)
Caused by: java.lang.ClassNotFoundException: javax.script.ScriptEngineManager
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    ... 17 more

起源于此的代码是我的记录器的初始化：

private static final Logger LOGGER = LoggerFactory.getLogger(NameAsCreated.class);

我依赖于：

• org.apache.logging.log4j:log4j-api:2.11.1
• org.apache.logging.log4j:log4j-core:2.11.1
• org.apache.logging.log4j:log4j-slf4j18-impl:2.11.1
• 一个依赖 org.slf4j:slf4j-api:1.8.0-beta2 的 maven 项目

我在 OSX Mojave 上使用 Java 版本：

openjdk version "11" 2018-09-25
OpenJDK Runtime Environment AdoptOpenJDK (build 11+28-201810021910)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11+28-201810021910, mixed mode)

有人知道我做错了什么以及我如何解决这个问题吗？

Answer 1

根据Log4j 文档：

Log4j 支持在其某些组件中使用 JSR 223 脚本语言。

并且如Alan BatemanJava 9的评论中所述，您必须使用--add-modules java.scripting或 in显式添加 java 脚本模块module-info.java。

还要注意的是，模块jdk.scripting.nashorn是在Java中11弃用，并会在将来的版本中删除。