将服务器端导入JAVA出错

哦，看到了，是用一个命令实现，可我执行这个命令时，报如下错误：
Exception in thread "main" java.lang.RuntimeException: javax.net.ssl.SSLHandshak
eException: sun.security.validator.ValidatorException: PKIX path building failed
: sun.security.provider.certpath.SunCertPathBuilderException: unable to find val
id certification path to requested target

怎么得到所依赖的所有jar包呢，这个方法也不行呀： gradlew.bat distZip

报错：F:\workspace\WEBIM>gradlew.bat distZip
Downloading https://services.gradle.org/distributions/gradle-1.12-bin.zip

Exception in thread "main" java.lang.RuntimeException: javax.net.ssl.SSLHandshak
eException: sun.security.validator.ValidatorException: PKIX path building failed
: sun.security.provider.certpath.SunCertPathBuilderException: unable to find val
id certification path to requested target
是我哪里没设置好吗？

解决了，原来是我的文件夹多了一层。

https://github.com/easemob/emchat-server-examples/tree/master/emchat-server-java

gradle构建