spring源码编译问题，证书文件找不到

在cmd中执行gradlew :spring-oxm:compileTestJava命令后，就会报错，报错如下：

D:\Project\spring-framework-5.2.21.RELEASE>gradlew :spring-oxm:compileTestJava
> Task :buildSrc:compileJava FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':buildSrc:compileJava'.
> Could not resolve all files for configuration ':buildSrc:compileClasspath'.
   > Could not resolve me.champeau.gradle:japicmp-gradle-plugin:0.2.8.
     Required by:
         project :buildSrc
      > Could not resolve me.champeau.gradle:japicmp-gradle-plugin:0.2.8.
         > Could not get resource 'https://repo.maven.apache.org/maven2/me/champeau/gradle/japicmp-gradle-plugin/0.2.8/japicmp-gradle-plugin-0.2.8.pom'.
            > Could not GET 'https://repo.maven.apache.org/maven2/me/champeau/gradle/japicmp-gradle-plugin/0.2.8/japicmp-gradle-plugin-0.2.8.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 me.champeau.gradle:japicmp-gradle-plugin:0.2.8.
         > Could not get resource 'https://plugins.gradle.org/m2/me/champeau/gradle/japicmp-gradle-plugin/0.2.8/japicmp-gradle-plugin-0.2.8.pom'.
            > Could not GET 'https://plugins.gradle.org/m2/me/champeau/gradle/japicmp-gradle-plugin/0.2.8/japicmp-gradle-plugin-0.2.8.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.谷歌.guava:guava:28.2-jre.
     Required by:
         project :buildSrc
      > Could not resolve com.谷歌.guava:guava:28.2-jre.
         > Could not get resource 'https://repo.maven.apache.org/maven2/com/谷歌/guava/guava/28.2-jre/guava-28.2-jre.pom'.
            > Could not GET 'https://repo.maven.apache.org/maven2/com/谷歌/guava/guava/28.2-jre/guava-28.2-jre.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.谷歌.guava:guava:28.2-jre.
         > Could not get resource 'https://plugins.gradle.org/m2/com/谷歌/guava/guava/28.2-jre/guava-28.2-jre.pom'.
            > Could not GET 'https://plugins.gradle.org/m2/com/谷歌/guava/guava/28.2-jre/guava-28.2-jre.pom'.
               > sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 8s

报的证书的错误，证书文件找不到，我这边通过网上的一些指导，导入https://repo.maven.apache.org、https://plugins.gradle.org、https://maven.aliyun.com/nexus/content/groups/public/三个网站的证书文件到E:\develop\jdk_1.8\jre\lib\security目录下，但是在运行还是还报证书文件找不到，请教各位大神，是什么原因？

这篇好文章是转载于：学新通技术网