我在 Ubuntu 18.04 中安装了 mongodb 4.0。 我正在使用 java-mongo-driver 3.12.1 我正在上传我的代码,您可以看到我已经检查了不同类型的连接,但它不起作用。
如何解决这个问题?
最佳答案
尝试一下,让我知道你的想法......
package test;
public class Main {
public static void main(String[] args) {
com.mongodb.client.MongoClient client = connectToStandAlone();
com.mongodb.client.MongoDatabase db = client.getDatabase("javatest");
QueryData(db);
}
private static com.mongodb.client.MongoClient connectToStandAlone() {
// STANDALONE STILL REQUIRES HOSTS LIST WITH ONE ELEMENT...
java.util.ArrayList<com.mongodb.ServerAddress> hosts = new java.util.ArrayList<com.mongodb.ServerAddress>();
hosts.add(new com.mongodb.ServerAddress("127.0.0.1", 27017));
com.mongodb.MongoCredential mongoCredential = com.mongodb.MongoCredential.createScramSha1Credential("testuser", "admin", "mysecret".toCharArray());
com.mongodb.MongoClientSettings mongoClientSettings = com.mongodb.MongoClientSettings.builder()
.applyToClusterSettings(clusterSettingsBuilder -> clusterSettingsBuilder.hosts(hosts))
.credential(mongoCredential)
.writeConcern(com.mongodb.WriteConcern.W1)
.readConcern(com.mongodb.ReadConcern.MAJORITY)
.readPreference(com.mongodb.ReadPreference.nearest())
.retryWrites(true)
.build();
com.mongodb.client.MongoClient client = com.mongodb.client.MongoClients.create(mongoClientSettings);
return client;
}
private static void QueryData(com.mongodb.client.MongoDatabase db) {
// DRIVER DOES NOT HAVE collection.findOne().
com.mongodb.client.MongoCollection<org.bson.Document> collection = db.getCollection("people");
com.mongodb.client.MongoCursor<org.bson.Document> cursor = collection.find(com.mongodb.client.model.Filters.eq("testfield", true))
.sort(new org.bson.Document("review_date", -1))
.skip(5)
.limit(20)
.iterator();
while(cursor.hasNext()) {
org.bson.Document document = cursor.next();
String json = document.toJson();
System.out.println(json);
boolean testfieldValue = document.getBoolean("testfield");
String ssnValue = document.getString("ssn");
}
}
}
关于java - Mongodb java 驱动程序 3.12.1 中的 MongoDB java 连接,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60215489/