java mongodb连接source是用户所在表admin

代码：

import com.mongodb.Block;
import com.mongodb.MongoClientSettings;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.client.ListDatabasesIterable;
import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoDatabase;
import com.mongodb.connection.ClusterSettings;
import org.bson.Document;

import java.util.Arrays;

public class test {
    public static void main(String[] args) {
        String user="root";     // the user name
        String source="admin";   // the source where the user is defined
        char[] password="kfz@kfz".toCharArray(); // the password as a character array
// ...
        MongoCredential credential = MongoCredential.createScramSha1Credential(user, source, password);
        MongoClient mongoClient = MongoClients.create(
                MongoClientSettings.builder()
                        .applyToClusterSettings(new Block<ClusterSettings.Builder>() {
                            public void apply(ClusterSettings.Builder builder) {
                                builder.hosts(Arrays.asList(new ServerAddress("114.213.146.34", 27017)));
                            }
                        })
                        .credential(credential)
                        .build());
        MongoDatabase syslog = mongoClient.getDatabase("syslog");
        syslog.createCollection("nlsj");
    }
}