Spring Boot / Gradle / Querydsl项目具有相同的依赖关系，依赖于另一个依赖关系的不同版本

Question

我在将Querydsl添加到我的Spring Boot项目时遇到问题。我的build.gradle文件中具有以下依赖项：

dependencies {
    annotationProcessor 'com.querydsl:querydsl-apt:4.1.3:jpa'
    annotationProcessor 'org.springframework.boot:spring-boot-starter-data-jpa'

    implementation 'com.querydsl:querydsl-jpa:4.1.3'

    implementation 'org.springframework.boot:spring-boot-starter-web'
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    implementation 'org.springframework.boot:spring-boot-starter-security'
    implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'
    implementation 'org.springframework.security.oauth.boot:spring-security-oauth2-autoconfigure:2.1.3.RELEASE'
    implementation 'org.springframework.cloud:spring-cloud-config-client:2.1.0.RELEASE'

    implementation 'mysql:mysql-connector-java'

    implementation 'io.springfox:springfox-swagger2:2.9.2'
    implementation 'io.springfox:springfox-swagger-ui:2.9.2'
    implementation 'io.springfox:springfox-bean-validators:2.9.2'
    implementation group: 'org.latencyutils', name: 'LatencyUtils', version: '2.0.3'

    testImplementation 'org.springframework.boot:spring-boot-starter-test'
    testImplementation 'org.springframework.security:spring-security-test'
    testImplementation 'junit:junit:4.12'
    testImplementation 'org.mockito:mockito-inline:2.23.4'
}

该项目构建良好，但是当我运行它时，出现以下错误：

An attempt was made to call the method com.google.common.collect.FluentIterable.concat(Ljava/lang/Iterable;Ljava/lang/Iterable;)Lcom/google/common/collect/FluentIterable; but it does not exist. Its class, com.google.common.collect.FluentIterable, is available from the following locations:

    jar:file:/C:/Users/me/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/18.0/cce0823396aa693798f8882e64213b1772032b09/guava-18.0.jar!/com/google/common/collect/FluentIterable.class
    jar:file:/C:/Users/me/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/20.0/89507701249388e1ed5ddcf8c41f4ce1be7831ef/guava-20.0.jar!/com/google/common/collect/FluentIterable.class

It was loaded from the following location:

    file:/C:/Users/me/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/18.0/cce0823396aa693798f8882e64213b1772032b09/guava-18.0.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of com.google.common.collect.FluentIterable

IntelliJ中的Gradle窗口显示以下内容：

为什么com.querydsl:querydsl-core:4.2.1的每个实例都依赖于不同版本的番石榴？

Answer 1

Guava版本18.0来自querydsl，版本20.0来自spring-fox swagger。

spring-fox库期望调用番石榴20.0版的方法。但从18.0开始。 （因为在类路径中有两个具有不同版本的番石榴库）

您可以使用以下代码来避免番石榴的冲突版本。

// QueryDsl
implementation("com.querydsl:querydsl-jpa:${querydslVersion}")
annotationProcessor("org.hibernate.javax.persistence:hibernate-jpa-2.1-api:1.0.2.Final")
annotationProcessor("com.querydsl:querydsl-apt:${querydslVersion}:jpa") {
    exclude group: "come.google.guava"
}
annotationProcessor("com.google.guava:guava:20.0")