java - JsonFactory 未找到 Java 类异常
问题描述
所以我对 Java 还是很陌生，我的意思是我刚接触 Java 一周，所以很多对我来说仍然是个谜。基本上，我正在使用 Google API 制作一个 SpigotMC 插件，以从实时流中获取数据。我正在使用 Maven，当我在那里运行程序时，它似乎工作正常。但是，在实际服务器上运行它时，我收到一个奇怪的错误。
这是整个错误消息：
org.bukkit.command.CommandException: Unhandled exception executing command 'chatcontrol' in plugin MinecraftButChatRuinsEverything v0.1
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at org.bukkit.craftbukkit.v1_14_R1.CraftServer.dispatchCommand(CraftServer.java:710) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.PlayerConnection.handleCommand(PlayerConnection.java:1641) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.PlayerConnection.a(PlayerConnection.java:1481) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.PacketPlayInChat.a(PacketPlayInChat.java:47) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.TickTask.run(SourceFile:18) [spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.executeTask(SourceFile:144) [spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) [spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.executeNext(SourceFile:118) [spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.MinecraftServer.aX(MinecraftServer.java:909) [spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.MinecraftServer.executeNext(MinecraftServer.java:902) [spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.awaitTasks(SourceFile:127) [spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.MinecraftServer.sleepForTick(MinecraftServer.java:886) [spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:819) [spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.NoClassDefFoundError: com/google/api/client/json/JsonFactory
at Commands.ChatControl.onCommand(ChatControl.java:33) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
... 17 more
Caused by: java.lang.ClassNotFoundException: com.google.api.client.json.JsonFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:471) ~[?:?]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:135) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:81) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
at java.lang.ClassLoader.loadClass(ClassLoader.java:588) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[?:?]
at Commands.ChatControl.onCommand(ChatControl.java:33) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[spigot-1.14.4.jar:git-Spigot-56f8471-eafd742]
我见过人们有同样的问题，但我从来没有看到一个好的或明确的解决方案。我试着自己修修补补，但没有太大的成功。我认为问题是由于以某种方式加载类，但我不知道如何处理这些信息。
这是调用 getChatId 方法后出现问题的类：
package Commands;
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.LiveBroadcastListResponse;
import java.io.*;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Timer;
import java.util.TimerTask;
public class YouTubeLiveStreamAPI {
static String streamID;
private static final String CLIENT_SECRETS = "client_secret.json";
private static final Collection<String> SCOPES =
Arrays.asList("https://www.googleapis.com/auth/youtube.readonly");
private static final String APPLICATION_NAME = "API code samples";
private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
/**
* Create an authorized Credential object.
*
* @return an authorized Credential object.
* @throws IOException
*/
public static Credential authorize(final NetHttpTransport httpTransport) throws IOException {
// Load client secrets.
File test = new File("src/main/resources/client_secret.json");
System.out.println(test.exists());
FileInputStream in = new FileInputStream(test);
// InputStream in = YouTubeLiveStreamAPI.class.getResourceAsStream(CLIENT_SECRETS);
GoogleClientSecrets clientSecrets =
GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
// Build flow and trigger user authorization request.
GoogleAuthorizationCodeFlow flow =
new GoogleAuthorizationCodeFlow.Builder(httpTransport, JSON_FACTORY, clientSecrets, SCOPES)
.build();
Credential credential =
new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()).authorize("user");
return credential;
}
/**
* Build and return an authorized API client service.
*
* @return an authorized API client service
* @throws GeneralSecurityException, IOException
*/
public static YouTube getService() throws GeneralSecurityException, IOException, GoogleJsonResponseException {
final NetHttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
Credential credential = authorize(httpTransport);
return new YouTube.Builder(httpTransport, JSON_FACTORY, credential)
.setApplicationName(APPLICATION_NAME)
.build();
}
/**
* Call function to create API service object. Define and
* execute API request. Print API response.
*
* @throws GeneralSecurityException, IOException, GoogleJsonResponseException
*/
public static void getChatId(String videoId)
throws GeneralSecurityException, IOException, GoogleJsonResponseException {
YouTube youtubeService = getService();
// Define and execute the API request
YouTube.LiveBroadcasts.List request = youtubeService.liveBroadcasts()
.list("snippet");
LiveBroadcastListResponse response = request.setId(videoId).execute();
YouTubeNormalChatAPI.chatId = response.getItems().get(0).getSnippet().getLiveChatId();
YouTubeNormalChatAPI.getService();
Timer timer = new Timer();
TimerTask task = new NormalChatTask();
timer.schedule(task, 0, 5000);
}
}
这是我的依赖项：
<dependency>
<groupId>org.spigotmc</groupId>
<artifactId>spigot-api</artifactId>
<version>1.12.2-R0.1-SNAPSHOT</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.google.api-client</groupId>
<artifactId>google-api-client</artifactId>
<version>1.30.6</version>
</dependency>
<dependency>
<groupId>com.google.oauth-client</groupId>
<artifactId>google-oauth-client-jetty</artifactId>
<version>1.30.4</version>
</dependency>
<dependency>
<groupId>com.google.apis</groupId>
<artifactId>google-api-services-youtube</artifactId>
<version>v3-rev212-1.25.0</version>
</dependency>
我知道这是一件漫长而复杂的事情，但非常感谢您的帮助！