无法使用 Morphia 连接到 MongoDb

Question

我正在尝试使用 Morphia 从 MongoDb.Im 中读取，使用 Mongo v3.6.4。我添加了 Morphia 依赖项：

<dependencies>
    <dependency>
        <groupId>org.mongodb.morphia</groupId>
        <artifactId>morphia</artifactId>
        <version>1.3.1</version>
    </dependency>
</dependencies>

现在我尝试连接到我的 MongoDb：

final Morphia morphia = new Morphia();
morphia.mapPackage("org.mongodb.morphia.example");
final Datastore datastore = morphia.createDatastore(new MongoClient("localhost", 27017), "redmatter");

但我得到了错误：

Exception in thread "pool-1-thread-1" java.lang.NoClassDefFoundError: org/bson/conversions/Bson
    at org.mongodb.morphia.Morphia.createDatastore(Morphia.java:90)
    at com.ie.pereda.server.GraphHandler.handle(GraphHandler.java:44)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
    at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:83)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:82)
    at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:675)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
    at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:647)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: org.bson.conversions.Bson
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

我连接到同一个 Mondo 数据库时没有问题：

MongoClient mongoClient = new MongoClient(new MongoClientURI("mongodb://localhost:27017"));
DB database = mongoClient.getDB("redmatter");

那连接没问题。 Morphia 的问题可能是什么？

编辑

@Victor 的解决方案似乎已经解决了这个问题，但提出了一个新问题：

Exception in thread "pool-1-thread-1" java.lang.NoSuchMethodError: com.mongodb.MongoClient.getDatabase(Ljava/lang/String;)Lcom/mongodb/client/MongoDatabase;
    at org.mongodb.morphia.DatastoreImpl.<init>(DatastoreImpl.java:114)
    at org.mongodb.morphia.DatastoreImpl.<init>(DatastoreImpl.java:99)
    at org.mongodb.morphia.Morphia.createDatastore(Morphia.java:90)
    at com.ie.pereda.server.GraphHandler.handle(GraphHandler.java:44)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
    at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:83)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:82)
    at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:675)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
    at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:647)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)    

Mongo 肯定是作为我之前用于连接工作的代码运行的......

Answer 1

尝试添加maven依赖

<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>bson</artifactId>
    <version>3.6.3</version>
</dependency>