Question

我是Spring Boot的新手，我想将默认记录器更改为log4j2，因为它的吞吐率比logback高。

这是我的Gradle脚本。如您所见，我正在使用Spring Boot 2.0.3，并禁用了Spring Boot Web之后使用的排除模块（logback和spring boot starter logger）的默认记录器。我正在脚本底部编译log4j。

buildscript {
    ext {
        springBootVersion = '2.0.3.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}



apply plugin: 'java'
apply plugin: 'war'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

group = 'app'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8



repositories {
    mavenCentral()
    jcenter()
}


ext {
    vaadinVersion = '8.4.1'
}

dependencies {
    compile('org.springframework.boot:spring-boot-starter-data-rest')
    providedCompile 'javax.servlet:javax.servlet-api:3.1.0'
    compile('org.springframework.boot:spring-boot-starter-security')
    compile('org.springframework.boot:spring-boot-starter-thymeleaf')
    compile('org.springframework.boot:spring-boot-starter-web') {
        exclude module: "spring-boot-starter-logging"
        exclude module: "logback-classic"
    }
    compile('org.springframework.boot:spring-boot-starter-webflux')
    compile('org.springframework.boot:spring-boot-starter-jdbc')
    compile('org.springframework.boot:spring-boot-starter-log4j2')
    compile('com.vaadin:vaadin-spring-boot-starter')
    runtime('org.springframework.boot:spring-boot-devtools')
    compileOnly('org.springframework.boot:spring-boot-configuration-processor')
    compileOnly('org.projectlombok:lombok')
    testCompile('org.springframework.boot:spring-boot-starter-test')
    testCompile('io.projectreactor:reactor-test')
    testCompile('org.springframework.security:spring-security-test')
    testCompile 'junit:junit:4.12'


    compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.1'
    compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.1'
    // https://mvnrepository.com/artifact/com.h2database/h2
    //compile group: 'com.h2database', name: 'h2', version: '1.0.60'
    testCompile group: 'com.h2database', name: 'h2', version: '1.3.148'





}

dependencyManagement {
    imports {
        mavenBom "com.vaadin:vaadin-bom:${vaadinVersion}"
    }
}

这是我的Spring Boot应用程序。

package app.clothapp;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ClothappApplication {

    public static void main(String[] args) {
        SpringApplication.run(ClothappApplication.class, args);
    }
}

但是，当我运行Spring Boot应用程序时，它为我提供了AbstractMethodError。我还阅读了其他一些SO问题，并且自上次编译以来，显然某些类已进行了不适当的更改。有人可以提供帮助吗？

Exception in thread "main" java.lang.AbstractMethodError: org.apache.logging.log4j.core.config.ConfigurationFactory.getConfiguration(Lorg/apache/logging/log4j/core/config/ConfigurationSource;)Lorg/apache/logging/log4j/core/config/Configuration;
    at org.apache.logging.log4j.core.config.ConfigurationFactory$Factory.getConfiguration(ConfigurationFactory.java:472)
    at org.apache.logging.log4j.core.config.ConfigurationFactory$Factory.getConfiguration(ConfigurationFactory.java:442)
    at org.apache.logging.log4j.core.config.ConfigurationFactory.getConfiguration(ConfigurationFactory.java:254)
    at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:419)
    at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:138)
    at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:147)
    at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:41)
    at org.apache.logging.log4j.LogManager.getContext(LogManager.java:175)
    at org.apache.commons.logging.LogFactory$Log4jLog.<clinit>(LogFactory.java:199)
    at org.apache.commons.logging.LogFactory$Log4jDelegate.createLog(LogFactory.java:166)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:109)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:99)
    at org.springframework.boot.SpringApplication.<clinit>(SpringApplication.java:198)
    at app.clothapp.ClothappApplication.main(ClothappApplication.java:10)

谢谢。

Answer 1

对from operator import add result = reduce(add, l) print(result)的传递依赖将不止一个。例如：

spring-boot-starter-logging取决于spring-boot-starter-security
spring-boot-starter取决于spring-boot-starter

您可以运行spring-boot-starter-logging进行确认。

为了从任何地方消除依赖性，请使用：

gradle dependencies

Spring suggest，包括对configurations { all*.exclude group: 'org.springframework.boot', module: 'spring-boot-starter-logging' }的依赖性，然后从此处排除记录器，例如：

spring-boot-starter

但是我发现并不是所有的Spring依赖关系都表现得如此出色，因此当在其他地方对Spring日志有明确的依赖关系时，上述有时会失败。

我尝试将Spring的默认记录器更改为log4j2有什么问题？

1 个答案: