当我尝试创建新的 Spring Boot 项目时，无法实例化 SLF4J LoggerFactory

Question

我是使用Spring开发Web项目的新手。我正在尝试创建一个新的 Spring 引导项目，但我无法运行我正在创建的应用程序。我已经尝试了与此主题相关的所有建议答案，但没有任何运气。这是我的错误：

 Failed to instantiate SLF4J LoggerFactory
   Reported exception:
java.lang.NoClassDefFoundError: ch/qos/logback/core/spi/LifeCycle
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.slf4j.impl.StaticLoggerBinder.<init>(StaticLoggerBinder.java:59)
    at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:50)
    at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
    at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
    at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:412)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:357)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:132)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:273)
    at org.springframework.boot.SpringApplication.<clinit>(SpringApplication.java:179)
    at com.example.demo.DemoApplication.main(DemoApplication.java:10)
Caused by: java.lang.ClassNotFoundException: ch.qos.logback.core.spi.LifeCycle
    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)
    ... 23 more
Exception in thread "main" java.lang.NoClassDefFoundError: ch/qos/logback/core/spi/LifeCycle
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.slf4j.impl.StaticLoggerBinder.<init>(StaticLoggerBinder.java:59)
    at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:50)
    at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
    at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
    at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:412)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:357)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:132)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:273)
    at org.springframework.boot.SpringApplication.<clinit>(SpringApplication.java:179)
    at com.example.demo.DemoApplication.main(DemoApplication.java:10)
Caused by: java.lang.ClassNotFoundException: ch.qos.logback.core.spi.LifeCycle
    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)
    ... 23 more
Process finished with exit code 1

知道吗？谢谢。

Answer 1

将以下库添加到pom.xml

   <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>

也试试这个：

mvn dependency:purge-local-repository

并做一个maven update