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Help & Documentation>TencentDB for MongoDB>SDK Reference>Java Connection Sample

Java Connection Sample

Last updated: 2025-02-08 11:18:44

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Related Description

TencentDB for MongoDB default provides two usernames, rwuser and mongouser, which support two authentication methods, MONGODB-CR and SCRAM-SHA-1. For these two authentication methods, the connection URI requires different handling. For details, see Connect Instances.
Java JAR package download, please choose version 3.2 or later.

Quick Start

Native Java sample code

package mongodbdemo;

import org.bson.*;
import com.mongodb.*;
import com.mongodb.client.*;

public class MongodbDemo {

    public static void main(String[] args) {
        String mongoUri = "mongodb://mongouser:thepasswordA1@10.66.187.127:27017/admin"; // Multiple IP instances URI can refer to: mongodb://mongouser:******@172.xx.xx.124:27017,172.xx.xx.27:27017,172.xx.xx.136:27017/test?authSource=admin&replicaSet=cmgo-fsstfgob_0
        MongoClientURI connStr = new MongoClientURI(mongoUri);
        MongoClient mongoClient = new MongoClient(connStr);
        try {
            // Use the database someonedb
            MongoDatabase database = mongoClient.getDatabase("someonedb");
            // Get the handle of the collection/table someonetable
            MongoCollection<Document> collection = database.getCollection("someonetable");

            // Prepare to write data
            Document doc = new Document();
            doc.append("key", "value");
            doc.append("username", "jack");
            doc.append("age", 31);

            // Write data
            collection.insertOne(doc);
            System.out.println("insert document: " + doc);

            // Read data
            BsonDocument filter = new BsonDocument();
            filter.append("username", new BsonString("jack"));
            MongoCursor<Document> cursor = collection.find(filter).iterator();
            while (cursor.hasNext()) {
                System.out.println("find document: " + cursor.next());
            }
        } finally {
            // Close the connection
            mongoClient.close();
        }
    }
}
Output:
INFO: Opened connection [connectionId{localValue:2, serverValue:67621}] to 10.66.122.28:27017
insert document: Document{{key=value, username=jack, age=31, _id=56a6ebb565b33b771f9826dd}}
find document: Document{{_id=56a3189565b33b2e7ca150ba, key=value, username=jack, age=31}}
Jan 26, 2016 11:44:53 AM com.mongodb.diagnostics.logging.JULLogger log
INFO: Closed connection [connectionId{localValue:2, serverValue:67621}] to 10.66.122.28:27017 because the pool has been closed.

Configuration sample for Spring Data MongoDB

This sample demonstrates how to configure the authentication database admin, which depends on the versions of Spring and Spring Data MongoDB you use.
<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
</bean>
<bean id="mongoDbFactory" class="org.springframework.data.mongodb.core.SimpleMongoDbFactory">
    <constructor-arg name="mongo" ref="mongo" />
    <constructor-arg name="databaseName" value="your target database" />
    <constructor-arg name="credentials" ref="userCredentials" />
    <constructor-arg name="authenticationDatabaseName" value="admin" />
</bean>
<bean id="userCredentials" class="org.springframework.data.authentication.UserCredentials">
    <constructor-arg name="username" value="username" />
    <constructor-arg name="password" value="password" />
</bean>
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