httpclient jar冲突。如何解决？

//这是我的代码，我在代理后面工作…

import org.apache.commons.io.IOUtils; import org.apache.http.HttpHost; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.impl.conn.DefaultProxyRoutePlanner; { HttpHost proxy = new HttpHost("proxyhost", 8082); DefaultProxyRoutePlanner routePlanner = new DefaultProxyRoutePlanner(proxy); HttpClient client = HttpClients.custom().setRoutePlanner(routePlanner).build(); HttpResponse response = client.execute(request);} 

//我的控制台上出现以下错误

  Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/ssl/SSLContexts at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:966) at TwitterFeeds.main(TwitterFeeds.java:40) Caused by: java.lang.ClassNotFoundException: org.apache.http.ssl.SSLContexts at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 2 more 

我正在使用以下jar子

 httpclient-4.5.2.jar httpcore-4.3.jar 

Answer 1

SSLContexts类已重新定位到httpclient 4.4中的另一个包。

自4.4

将您的httpcore版本升级到至少4.4以解决该问题。

Answer 2

请看一下答案 – 线程“main”中的exceptionjava.lang.NoClassDefFoundError：org / apache / http / ConnectionReuseStrategy : .

将httpcore版本更新为4.4。 它应该适合你。