java NoClassDefFoundError: HttpClient 4 (APACHE)
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NoClassDefFoundError: HttpClient 4 (APACHE)
提问by Pujan Srivastava
I am using apache http commons 4.I have added both httpcore-4.0.1.jar and httpclient-4.0.1.jar in the classpath of netbeans. I am getting error:
java.lang.NoClassDefFoundError: org/apache/http/impl/client/DefaultHttpClient
我正在使用 apache http commons 4.我在 netbeans 的类路径中添加了 httpcore-4.0.1.jar 和 httpclient-4.0.1.jar。我收到错误：
java.lang.NoClassDefFoundError: org/apache/http/impl/client/DefaultHttpClient
My Code is as follows. Please help.
我的代码如下。请帮忙。
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
public class HttpClientManager {
public HttpClient httpclient;
public HttpClientManager() {
this.init();
}
public void init() {
try {
httpclient = new DefaultHttpClient();
} catch (Exception e) {
e.printStackTrace();
}
}
public void getCourseList() {
String url = "http://exnet.in.th/api.php?username=demoinst&ha=2b62560&type=instructor";
HttpGet httpget = new HttpGet(url);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
try {
String responseBody = httpclient.execute(httpget, responseHandler);
System.out.println(responseBody);
} catch (Exception e) {
}
}
}
采纳答案by Pujan Srivastava
This exception happened because of Felix did not find the actual class as it was not included the import. Thanks all for answering this.
发生此异常是因为 Felix 没有找到实际的类，因为它没有包含在导入中。感谢大家回答这个问题。
OK I got it work by adding path of DefaultHttpClient to felix.properties –
好的，我通过将 DefaultHttpClient 的路径添加到 felix.properties 使其工作 -
回答by Adeel Ansari
Just to point out NoClassDefFoundErrorand NoClassFoundExceptionare not the one and the same thing?
只是要指出NoClassDefFoundError和NoClassFoundException是不是一回事？
You might want to look into Demystified class loading problem series.
您可能想查看Demystified 类加载问题系列。
All the best.
一切顺利。
回答by stacker
httpclient-4.0.1.jarcontains org.apache.http.impl.client.DefaultHttpClientcheck your classpath for typos.
httpclient-4.0.1.jar包含org.apache.http.impl.client.DefaultHttpClient检查您的类路径是否有拼写错误。
