引起:java.lang.ClassNotFoundException:org.slf4j.LoggerFactory [英] Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
问题描述
java和slf4j的一些问题
使用idea创建项目并且没问题。但是,如果我尝试使用gradle制作jar,我遇到了一些问题。
build.gradle
group'test.test'
version'1.0-SNAPSHOT'
apply plugin:'java'
sourceCompatibility = 1.8
存储库{
mavenCentral()
}
依赖关系{
testCompile组:'junit',名称:'junit',版本:' 4.11'
compile'org.slf4j:slf4j-api:1.7.20'
compile'ch.qos.logback:logback-classic:1.1.7'
}
$ b $ jar {
manifest {
属性'Main-Class':'Test'
}
}
Test.java
import org.slf4j.Logger;
导入org.slf4j.LoggerFactory;
public class Test {
private static final Logger LOGGER = LoggerFactory.getLogger(Test.class);
public static void main(String [] args){
LOGGER.info(info);
$ / code $ / pre
$ b $终端:
gradle build
java -jar target / HttpServer-1.0-SNAPSHOT.jar
输出:
线程main中的异常java.lang.NoClassDefFoundError: org / slf4j / LoggerFactory
at HttpServerHH.Main。< clinit>(Main.java:15)
导致:java.lang.ClassNotFoundException:org.slf4j.LoggerFactory $ b $在java。 net.URLClassLoader.findClass(URLClassLoader.java:381)$ b $在java.lang.ClassLoader.loadClass(ClassLoader.java:424)
在sun.misc.Launcher $ AppClassLoader.loadClass(Launcher.java: 331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 1 more
我试图使用gradle / maven(mvn package)相同的问题。在classpath中找不到Logger和LoggerFactory的一些原因。
解决方案感谢Michael回忆有关胖子的事情。在您的评论尝试谷歌:gradle构建脂肪罐,并修改后我的build.gradle
jar {
来自{
configurations.compile.collect {
it.isDirectory()?它:zipTree(它)
}
}
清单{
属性'Main-Class':'Test'
}
}
some problems with java and slf4j
Made project using idea and it is ok. But in case I try to make jar with gradle I have some problems.
build.gradle
group 'test.test'
version '1.0-SNAPSHOT'
apply plugin: 'java'
sourceCompatibility = 1.8
repositories {
mavenCentral()
}
dependencies {
testCompile group: 'junit', name: 'junit', version: '4.11'
compile 'org.slf4j:slf4j-api:1.7.20'
compile 'ch.qos.logback:logback-classic:1.1.7'
}
jar {
manifest {
attributes 'Main-Class': 'Test'
}
}
Test.java
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Test {
private static final Logger LOGGER = LoggerFactory.getLogger(Test.class);
public static void main(String[] args) {
LOGGER.info("info");
}
}
Terminal:
gradle build
java -jar target/HttpServer-1.0-SNAPSHOT.jar
Output:
Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at HttpServerHH.Main.<clinit>(Main.java:15)
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 1 more
I tried to use gradle/maven (mvn package) the same problem. Some reasons it cannot find Logger and LoggerFactory in classpath.
解决方案 Thanks Michael for remembering about fat jar. After your comment tried to google: "gradle build fat jar" and after it modified my build.gradle
jar {
from {
configurations.compile.collect {
it.isDirectory() ? it : zipTree(it)
}
}
manifest {
attributes 'Main-Class': 'Test'
}
}
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