java.lang.NoClassDefFoundError : org/apache/http/concurrent/FutureCallback 错误

Question

我正在尝试使用 Unirest-Mashape 构建 Java 应用程序。

这是我的代码:

import com.mashape.unirest.http.*;
public class PAskMe
{
  public static void main(String args[]) throws Exception
  {
        HttpResponse<JsonNode> response = Unirest.get("https://montanaflynn-dictionary.p.mashape.com/define?word=irony").
                                                                                header("X-Mashape-Key", "KEY").
                                                                                asJson();
        System.out.println(response.toString());
  }
}

当我编译我的代码时，它没有显示任何错误。但是当我运行它时，它显示以下运行时错误:

java.lang.NoClassDefFoundError: org/apache/http/concurrent/FutureCallback
at com.mashape.unirest.request.BaseRequest.asJson(BaseRequest.java:68)
at PAskMe.PAskMe.main(PAskMe.java:14)
at PAskMe.__SHELL0.run(__SHELL0.java:6)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at bluej.runtime.ExecServer$3.run(ExecServer.java:725)

Caused by: java.lang.ClassNotFoundException: org.apache.http.concurrent.FutureCallback
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
... 8 more

我已将这些 jar 包含在我的项目中:

但我仍然收到错误。请帮助我。

Answer 1

下载 httpcore-4.2.3.jar 并将其添加到您的类路径中。