java - org.apache.http.ssl.TrustStrategy 上的 ClassNotFoundException

Question

我正在尝试运行一个发出 HTTP/HTTPS POST 请求的插件。它声明了所需的依赖项，即 httpclient 和 httpcore。我分别使用版本 4.5.3 和 4.4.6。尽管全部正确导入(我的意思是)，但我在执行时遇到了这个错误:

Caused by: java.lang.NoClassDefFoundError: 
org/apache/http/ssl/TrustStrategy
25.06 19:59:12 [Server] INFO at 
com.b5team.postrequest.Main.onCommand(Main.java:77) ~[?:?]
25.06 19:59:12 [Server] INFO at 
org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~
[Spigot.jar:git-Spigot-3fb9445-6e3cec8]
25.06 19:59:12 [Server] INFO ... 10 more
25.06 19:59:12 [Server] INFO Caused by: 
java.lang.ClassNotFoundException: org.apache.http.ssl.TrustStrategy

这是我的代码:

package com.b5team.postrequest;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;

public class SocketPOSTRequest {

    public void sendRequest(String myurl, String hash, String args[]) throws KeyManagementException, NoSuchAlgorithmException, KeyStoreException, ClientProtocolException, IOException {

        HttpClientBuilder b = HttpClientBuilder.create();

        SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {

            public boolean isTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
                return true;
            }
        }).build();

        b.setSSLContext(sslContext);

        HostnameVerifier hostnameVerifier = NoopHostnameVerifier.INSTANCE;

        SSLConnectionSocketFactory sslSocketFactory = new SSLConnectionSocketFactory(sslContext, hostnameVerifier);
        Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory> create()
                .register("http", PlainConnectionSocketFactory.getSocketFactory())
                .register("https", sslSocketFactory)
                .build();

        PoolingHttpClientConnectionManager connMgr = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
        b.setConnectionManager(connMgr);

        HttpClient client = b.build();
        HttpPost post = new HttpPost(myurl);

        List<NameValuePair> params = new ArrayList<NameValuePair>(args.length);
        params.add(new BasicNameValuePair("hash", hash));

        for(int i = 0; i < args.length; i++) {
            params.add(new BasicNameValuePair("arg"+i, args[i]));
        }

        post.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));
        HttpResponse response = client.execute(post);
        HttpEntity entity = response.getEntity();

        if (entity != null) {

            InputStream in = entity.getContent();
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));
            String line;

            System.out.println("[POSTRequest] Data sent successfully!");

            while ((line = reader.readLine()) != null) {
                System.out.println("[POSTRequest] Report: "+line);
            }
        }
    }
}

编辑: 我正在使用 Ant 进行构建，并且正确添加了依赖项。我也用 Maven 进行了测试，添加了依赖项，但错误仍然存​​在。

EDIT2:切换到 Maven，添加了 maven-shade-plugin 和 maven-compile-plugin。错误消失了，但现在得到了这个 java.lang.NoSuchMethodError: org.apache.http.impl.client.HttpClientBuilder.setSSLContext。使用 junit 运行时，不会出现任何错误。它仅在服务器上运行时发生，即 Spigot 1.11.2 Minecraft 服务器。

Answer 1

如果您使用的是 Maven 项目，请在您的 pom.xml 文件中添加以下依赖项。

 <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.3</version>
</dependency>