java-如何正确配置gradle build以避免从生成的jar中包含log4j和slf4j？
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我的spring-boot应用程序出现问题：我可以在Eclipse中运行它,但无法运行jar文件(使用gradle构建).
我运行以下命令来构建我的项目：
gradle buid
构建成功：
gradle build
:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:findMainClass
:jar
:bootRepackage
:assemble
:compileTestJava UP-TO-DATE
:processTestResources UP-TO-DATE
:testClasses UP-TO-DATE
:test UP-TO-DATE
:check UP-TO-DATE
:build
BUILD SUCCESSFUL
Total time: 1.214 secs
这是生成的jar文件的一部分：
jar -tvf build/libs/springboot-receiver-api-0.1.0.jar | grep log
9988 Mon Apr 04 20:37:48 CDT 2016 BOOT-INF/lib/slf4j-log4j12-1.7.21.jar
2308 Wed Sep 21 07:11:50 CDT 2016 BOOT-INF/lib/spring-boot-starter-logging-1.4.1.RELEASE.jar
66802 Thu May 28 09:49:34 CDT 2015 BOOT-INF/lib/jboss-logging-3.3.0.Final.jar
304075 Tue Mar 29 22:24:50 CDT 2016 BOOT-INF/lib/logback-classic-1.1.7.jar
23646 Mon Apr 04 20:39:02 CDT 2016 BOOT-INF/lib/log4j-over-slf4j-1.7.21.jar
470782 Tue Mar 29 22:23:42 CDT 2016 BOOT-INF/lib/logback-core-1.1.7.jar
489884 Sun May 06 13:24:48 CDT 2012 BOOT-INF/lib/log4j-1.2.17.jar
当我尝试运行此jar文件时,出现以下错误：
java -jar build/libs/springboot-receiver-api-0.1.0.jar
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/Users/eugene/.Trash/springboot-receiverapi/build/libs/springboot-receiver-api-0.1.0.jar!/BOOT-INF/lib/slf4j-log4j12-1.7.21.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/eugene/.Trash/springboot-receiverapi/build/libs/springboot-receiver-api-0.1.0.jar!/BOOT-INF/lib/logback-classic-1.1.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Detected both log4j-over-slf4j.jar AND bound slf4j-log4j12.jar on the class path, preempting StackOverflowError.
Exception in thread "main" 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.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:58)
Caused by: java.lang.ExceptionInInitializerError
at org.slf4j.impl.StaticLoggerBinder.<init>(StaticLoggerBinder.java:72)
Caused by: java.lang.IllegalStateException: Detected both log4j-over-slf4j.jar AND bound slf4j-log4j12.jar on the class path, preempting StackOverflowError. See also http://www.slf4j.org/codes.html#log4jDelegationLoop for more details.
at org.slf4j.impl.Log4jLoggerFactory.<clinit>(Log4jLoggerFactory.java:54)
... 19 more
这是我的build.gradle文件：
apply plugin: 'java'
apply plugin: 'maven'
group = 'uptake'
version = '0.0.1-snapshot'
description = """Spring-Boot-ReceiverAPI"""
sourceCompatibility = 1.8
targetCompatibility = 1.8
tasks.withType(JavaCompile) {
options.encoding = 'UTF-8'
}
repositories {
maven { url "http://repo.maven.apache.org/maven2" }
}
dependencies {
compile(group: 'org.springframework.boot', name: 'spring-boot-starter-web', version:'1.2.3.RELEASE') {
exclude(module: 'log4j-over-slf4j')
}
compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version:'1.2.3.RELEASE'
compile group: 'org.postgresql', name: 'postgresql', version:'9.3-1102-jdbc41'
compile group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-hibernate4', version:'2.8.1'
compile group: 'com.fasterxml.jackson.core', name: 'jackson-core', version:'2.8.3'
compile group: 'org.apache.kafka', name: 'kafka_2.10', version:'0.9.0.0'
compile group: 'org.springframework.integration', name: 'spring-integration-kafka', version:'2.0.1.RELEASE'
compile group: 'org.apache.zookeeper', name: 'zookeeper', version:'3.4.5'
compile(group: 'commons-beanutils', name: 'commons-beanutils', version:'1.9.2') {
exclude(module: 'commons-logging')
}
compile group: 'org.json', name: 'json', version:'20090211'
compile group: 'org.codehaus.jackson', name: 'jackson-mapper-asl', version:'1.5.0'
compile(group: 'org.springframework', name: 'spring-core', version:'4.3.3.RELEASE') {
exclude(module: 'commons-logging')
}
compile group: 'com.spotify', name: 'docker-maven-plugin', version:'0.4.13'
}
configurations.all {
exclude group: "org.slf4j", module: "slf4j-log4j12"
exclude group: "log4j", module: "log4j"
}
我该怎么办,以避免日志库的冲突,并能够独立运行我的jar文件？
解决方法:
几件事,在我看来您的build.gradle应该声明：
> Spring Boot Gradle插件
>应用Spring Boot插件
>让Spring Boot管理您的大多数依赖版本
该脚本对我有用：
apply plugin: 'java'
apply plugin: 'maven'
apply plugin: 'spring-boot'
group = 'uptake'
version = '0.0.1-snapshot'
description = """Spring-Boot-ReceiverAPI"""
sourceCompatibility = 1.8
targetCompatibility = 1.8
tasks.withType(JavaCompile) {
options.encoding = 'UTF-8'
}
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'org.springframework.boot:spring-boot-gradle-plugin:1.4.1.RELEASE'
}
}
repositories {
maven { url "http://repo.maven.apache.org/maven2" }
}
dependencies {
compile 'org.springframework.boot:spring-boot-starter'
compile 'org.springframework.boot:spring-boot-starter-logging'
compile 'org.springframework.boot:spring-boot-starter-web'
compile 'org.springframework.boot:spring-boot-starter-data-jpa'
compile 'org.postgresql:postgresql'
compile 'com.fasterxml.jackson.datatype:jackson-datatype-hibernate4'
compile 'com.fasterxml.jackson.core:jackson-core'
compile 'org.apache.kafka:kafka_2.10:0.9.0.0'
compile 'org.springframework.integration:spring-integration-kafka:2.0.1.RELEASE'
compile 'org.apache.zookeeper:zookeeper:3.4.5'
compile 'commons-beanutils:commons-beanutils'
compile 'org.json:json'
compile 'org.codehaus.jackson:jackson-mapper-asl:1.5.0'
compile 'org.springframework:spring-core'
compile 'com.spotify:docker-maven-plugin:0.4.13'
}
configurations.all {
exclude module: 'slf4j-log4j12'
exclude module: 'jms'
exclude module: 'jmxtools'
exclude module: 'jmxri'
}
现在,如果您使用gradledependencyInsight检查两个模块,则只会找到log4j-over-slf4j：
$gradle dependencyInsight --dependency slf4j-log4j12
$No dependencies matching given input were found...
$gradle dependencyInsight --dependency log4j-over-slf4j
:dependencyInsight
org.slf4j:log4j-over-slf4j:1.7.21 (selected by rule)
\--- org.springframework.boot:spring-boot-starter-logging:1.4.1.RELEASE
+--- compile
\--- org.springframework.boot:spring-boot-starter:1.4.1.RELEASE
+--- compile
+--- org.springframework.boot:spring-boot-starter-web:1.4.1.RELEASE
| \--- compile
+--- org.springframework.boot:spring-boot-starter-data-jpa:1.4.1.RELEASE
| \--- compile
+--- org.springframework.boot:spring-boot-starter-aop:1.4.1.RELEASE
| \--- org.springframework.boot:spring-boot-starter-data-jpa:1.4.1.RELEASE (*)
\--- org.springframework.boot:spring-boot-starter-jdbc:1.4.1.RELEASE
\--- org.springframework.boot:spring-boot-starter-data-jpa:1.4.1.RELEASE (*)
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