无法解析com.android.tools.build.gradle:3.0.1

Question

distributionUrl=http\://services.gradle.org/distributions/gradle-4.3-all.zip

buildscript {
repositories {
    //jcenter()
    //google()
    maven { url "http://jcenter.bintray.com"}     
    }
dependencies {
    classpath 'com.android.tools.build:gradle:3.0.1'

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}}

allprojects {
repositories {
    jcenter()
    maven { url 'http://maven.google.com' }
    maven { url "http://jitpack.io" }
}}

> Could not resolve all files for configuration ':classpath'.
> Could not find com.android.tools.build:gradle:3.0.1.
Searched in the following locations:
http://jcenter.bintray.com/com/android/tools/build/gradle/3.0.1/gradle-3.0.1.pom
http://jcenter.bintray.com/com/android/tools/build/gradle/3.0.1/gradle-3.0.1.jar
Required by:
     project :* Try:

       > Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.0.1/gradle-3.0.1.pom'.
        > Could not GET 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.0.1/gradle-3.0.1.pom'.

buildscript {
repositories {
    //jcenter()
    //google()
    maven { url "http://jcenter.bintray.com"}
    maven { url "http://maven.google.com"}

    }

      > Could not resolve com.android.tools.build:gradle:3.0.1.
     > Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.0.1/gradle-3.0.1.pom'.
        > Could not GET 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.0.1/gradle-3.0.1.pom'.
           > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  > Could not resolve com.android.tools.build:gradle:3.0.1.
     > Could not get resource 'http://maven.google.com/com/android/tools/build/gradle/3.0.1/gradle-3.0.1.pom'.
        > Could not GET 'http://maven.google.com/com/android/tools/build/gradle/3.0.1/gradle-3.0.1.pom'.
           > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Answer 1

allprojects {
    repositories {
        google()

        // If you're using a version of Gradle lower than 4.1, you must instead use:
        // maven {
        //     url 'https://maven.google.com'
        // }
        // An alternative URL is 'https://dl.google.com/dl/android/maven2/'
    }
}

buildscript 
{

    repositories {
        jcenter()
        google()
        maven { url "http://jcenter.bintray.com"}     
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'

    }
}

allprojects 
{
    repositories {
        jcenter()
        maven { url "https://jitpack.io" }
        google()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}