抓取葡萄错误– [下载失败：commons-logging＃commons-logging; 1.2！commons-logging.jar]

Question

我开始学习常规。我喜欢使用httpbuilder。我发现我应该使用@Grab，所以我写了这个例子

// https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient
@Grapes(
        @Grab(group='org.apache.httpcomponents', module='httpclient', version='4.5.7')
)


import org.apache.http.client.methods.*
import org.apache.http.entity.*
import org.apache.http.impl.client.*
import groovy.json.*
// build JSON

def map = [:]
map["name"] = "Maritime DevCon"
map["address"] = "Fredericton"
map["handle"] = "maritimedevcon"

def jsonBody = new JsonBuilder(map).toString()

// build HTTP POST

def url = 'http://jsonplaceholder.typicode.com/posts'
def post = new HttpPost(url)

post.addHeader("content-type", "application/json")
post.setEntity(new StringEntity(jsonBody))

// execute

def client = HttpClientBuilder.create().build()
def response = client.execute(post)

def bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()))
def jsonResponse = bufferedReader.getText()
println "response: \n" + jsonResponse

def slurper = new JsonSlurper()
def resultMap = slurper.parseText(jsonResponse)

assert "Maritime DevCon" == resultMap["name"]
assert resultMap["id"] != null

我的互联网连接正常，但是我得到了

Information:Groovyc: While compiling groovyWItholdJava: java.lang.RuntimeException: Error grabbing Grapes -- [download failed: commons-logging#commons-logging;1.2!commons-logging.jar]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
...

这可能是什么原因？我什至可以在浏览器中打开mvn中央存储库。