我需要在 gradle.properties 中保留依赖项的版本。gradle.properties:springBootVersion = '2.1.9.RELEASE'构建.gradle：plugins {    id 'io.spring.dependency-management' version '1.0.8.RELEASE'    id 'org.springframework.boot' version '2.1.9.RELEASE'}subprojects {    repositories {        mavenCentral()    }    configurations.all {        resolutionStrategy {            failOnVersionConflict()        }    }    apply plugin: 'java'    apply plugin: 'io.spring.dependency-management'    dependencyManagement {        dependencies {            dependency "org.springframework.boot:spring-boot-starter-web:${springBootVersion}"            dependency "org.springframework.boot:spring-boot-starter-test:${springBootVersion}"        }    }    sourceCompatibility = 11    targetCompatibility = 11    tasks.withType(JavaCompile){        options.encoding = 'UTF-8'    }}设置.gradle：include 'api'api/build.gradle：apply plugin: 'org.springframework.boot'archivesBaseName = 'phone-gift-processing-api'dependencies {    implementation 'org.springframework.boot:spring-boot-starter-web'    testImplementation 'org.springframework.boot:spring-boot-starter-test'}输出./gradlew clean build：> Task :api:compileJava FAILEDFAILURE: Build failed with an exception.* What went wrong:Execution failed for task ':api:compileJava'.> Could not resolve all files for configuration ':api:compileClasspath'.   > Could not find org.springframework.boot:spring-boot-starter-web:'2.1.9.RELEASE'.     Required by:         project :api即，Gradle 使用springBootVersion，但由于某种原因无法绑定依赖项。当我替换${springBootVersion}为时${springBootVersion}，构建成功。