MongoClient连接数据库

水深无声 2024-03-24 06:16 3阅读 0赞

public class DbManager {
        
        private static volatile DbManager instance;
    
        private static final Logger logger = LoggerFactory.getLogger(DbManager.class);
    
        private MongoClient mongoClient;
    
        private DbManager() {
        
    
        }
    
        public static DbManager getInstance() {
        
    
            if (null == instance) {
        
                synchronized (DbManager.class) {
        
                    if (null == instance) {
        
                        instance = new DbManager();
                        instance.init();
                    }
    
                }
            }
    
            return instance;
        }
    
        private void init() {
        
    
            // 连接池选项
         
            // 选项构建者
            com.mongodb.MongoClientOptions.Builder builder = new MongoClientOptions.Builder();
            
            // 每个地址最大请求数
            builder.connectionsPerHost(8);
            builder.threadsAllowedToBlockForConnectionMultiplier(4);
            
            // 设置连接超时时间
            builder.connectTimeout(10000);
            
            // 设置最大等待时间
            builder.maxWaitTime(120000);
            
            // 读取数据的超时时间
            builder.socketTimeout(1500);
    
            MongoClientOptions options = builder.build();
    
            List<ServerAddress> hosts = new ArrayList<ServerAddress>();
    
            String host = "127.0.0.1";
            logger.info("dbhost:"+host);
            int port = 27017;
            ServerAddress serverAddress = new ServerAddress(host, port);
            hosts.add(serverAddress);
    
            List<MongoCredential> credentials = new ArrayList<MongoCredential>();
    
            MongoCredential credential = MongoCredential.createCredential("admin","admin","123456".toCharArray());  // 需要验证
            credentials.add(credential);
    　　　　　//不使用用户名密码
           // mongoClient = new MongoClient(hosts);　　　　　　　　　//使用用户名密码
             mongoClient=new MongoClient(serverAddress, Arrays.asList(credential));
    
        }
    
        public MongoClient getMongoClient() {
        
            return mongoClient;
        }
        
        public DB getDataDb() {
        
            DB db = mongoClient.getDB("data");
    
            return db;
        }
    }