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비슷한 질문을 많이했기 때문에 내 오류에 대한 해결책을 찾으려고했지만 결과가 너무 많아서 내 질문에 대한 답을 찾지 못했습니다.slf4j log4j 안녕하세요 세계 문제
기본적으로 log4j가 작동하는 slf4j에서 간단한 "Hello World"를 얻으려고하므로 나중에 사용자 정의 할 수 있습니다.
App.java :
내 프로젝트는 기본적으로 약간 조정 받는다는 안녕하세요 세계 프로젝트입니다
package xx.xxxx.logging;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class App {
private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
public static void main(String[] args) {
System.out.println("Hello World!");
LOGGER.info("Hello Logger!");
}
}
log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<Appenders>
<Console name="STDOUT" target="System.out">
<PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n"/>
</Console>
</Appenders>
<Loggers>
<Root level="ALL">
<AppenderRef ref="STDOUT"/>
</Root>
</Loggers>
</Configuration>
의 pom.xml :
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>xx.xxxx.logging</groupId>
<artifactId>logging-test</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>logging-test</name>
<properties>
<jdk.version>1.8</jdk.version>
<java.version>1.8</java.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
<sonar.java.source>${java.version}</sonar.java.source>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<version.sl4j>1.7.21</version.sl4j>
<version.sl4j.log4j>2.0.1</version.sl4j.log4j>
</properties>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${version.sl4j}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${version.sl4j.log4j}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${version.sl4j.log4j}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${version.sl4j.log4j}</version>
</dependency>
</dependencies>
</project>
시도 중 App.java를 실행하면 다음 오류가 발생합니다.
2017-12-07 11:14:33,263 ERROR catching java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:133)
at org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:744)
at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:683)
at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:675)
at org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:349)
at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:150)
at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:364)
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:422)
at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:146)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:75)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:37)
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:263)
at org.apache.logging.slf4j.Log4jLoggerFactory$PrivateManager.getContext(Log4jLoggerFactory.java:98)
at org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:84)
at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:44)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:358)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:383)
at xx.xxxx.logging.App.<clinit>(App.java:8)
Caused by: java.lang.IllegalArgumentException: No enum constant org.apache.logging.log4j.core.appender.ConsoleAppender.Target.System.out
at java.lang.Enum.valueOf(Enum.java:238)
at org.apache.logging.log4j.core.appender.ConsoleAppender$Target.valueOf(ConsoleAppender.java:57)
at org.apache.logging.log4j.core.appender.ConsoleAppender.createAppender(ConsoleAppender.java:98)
... 22 more
2017-12-07 11:14:33,268 ERROR Unable to invoke factory method in class class org.apache.logging.log4j.core.appender.ConsoleAppender for element Console.
2017-12-07 11:14:33,269 ERROR Null object returned for Console in Appenders.
2017-12-07 11:14:33,275 ERROR Unable to locate appender STDOUT for logger
Hello World!
이 문제를 해결하는 방법에 대한 모든 리드는 크게 감사하겠습니다.
'에 따라 log4j에 구문을 따라하려고하지 않음 열거 상수 org.apache.logging.log4j.core.appender.ConsoleAppender.Target.System합니다. out'로 바꾸십시오.'SYSTEM_OUT'으로 바꾸십시오. – Touniouk
감사합니다. 이것은 정확하게 오류였습니다. – Michel