Java 无法创建新的 PoolingHttpClientConnectionManager
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/19641910/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Failing to create new PoolingHttpClientConnectionManager
提问by user2816029
My program contains the following line, and just hangs at this point, and I'm not quite sure why.
我的程序包含以下行，此时挂起，我不太确定为什么。
PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager();
When debugging in Eclipse, if I try to evaluate "new PoolingHttpClientConnectionManager()" in the Display view I get these errors:
在 Eclipse 中调试时，如果我尝试在 Display 视图中评估“new PoolingHttpClientConnectionManager()”，我会收到以下错误：
java.lang.NoClassDefFoundError: org/apache/http/config/Lookup
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
...omitted - referring to specific lines in code...
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.apache.http.config.Lookup
at java.net.URLClassLoader.run(Unknown Source)
at java.net.URLClassLoader.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)
... 10 more
I am using httpclient.jar version 4.3.1 from org.apache.httpcomponents.
我正在使用来自 org.apache.httpcomponents 的 httpclient.jar 版本 4.3.1。
Anyone else experience this problem? Any solution? Or am I doing something silly?
还有其他人遇到过这个问题吗？有什么解决办法吗？还是我在做傻事？
采纳答案by Luciano
回答by Wouter
回答by Ken Lin
The org.apache.http.config.Lookupclass is not in httpclient-4.3.1.jar. It is in httpcore-4.3.jar.
org.apache.http.config。查找类不在 httpclient-4.3.1.jar 中。它在 httpcore-4.3.jar 中。
If you are not using Maven, to understand the httpclient dependencies, see http://hc.apache.org/httpcomponents-client-4.3.x/httpclient/dependencies.html
如果您没有使用 Maven，要了解 httpclient 依赖项，请参阅http://hc.apache.org/httpcomponents-client-4.3.x/httpclient/dependencies.html
