spring boot jar包冲突的解决办法

Question

log4j和logback的jar包冲突怎么解决?
项目使用gradle构建的

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/Users/ezreally/.gradle/caches/modules-2/files-2.1/ch.qos.logback/logback-classic/1.1.5/92353eb144695bba80b31f7bec4f36d871f230ac/logback-classic-1.1.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/ezreally/.gradle/caches/modules-2/files-2.1/org.slf4j/slf4j-log4j12/1.7.16/54c6dd23a7c420e40b8848e962d5f2a3534260af/slf4j-log4j12-1.7.16.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]

build.gradle配置文件:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.3.3.RELEASE")
    }
}

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'spring-boot'

jar {
    baseName = 'wanjubang-api'
    version = '0.1.0'
}

repositories {
    mavenCentral()
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

dependencies {
    compile("org.springframework.boot:spring-boot-starter-web")
    compile("org.springframework.boot:spring-boot-starter-jetty")
    compile("org.springframework.boot:spring-boot-starter-log4j")
    testCompile("junit:junit")
}

task wrapper(type: Wrapper) {
    gradleVersion = '2.3'
}

Answer 1

现查找一下哪些包引用了，
然后配置一下 exclusions

Answer 2

gradle dependencies查看依赖关系
然后再exclude冲突的类库。

Answer 3

版本太多了留一种就够了

Answer 4

找到冲突类库，排除掉.spring-boot-starter-web 默认log日志为logback

configurations {
    compile.exclude module: 'spring-boot-starter-logback'
}