MongoDBConfig

public class MongoDBConfig extends AbstractMongoConfiguration {    @Value("${mongo.databaseName}")    private String databaseName;    @Value("${mongo.user}")    private String username;    @Value("${mongo.password}")    private String password;    @Value("${mongo.host}")    private String host;    @Value("${mongo.port}")    private Integer port;    @Bean    public Mongo mongo() {        LOG.debug("MongoClient开始初始化,host:{},port:{}",host,port);        MongoClient mongoClient = new MongoClient(Arrays.asList(new ServerAddress(host, port)),                Arrays.asList(MongoCredential.createCredential(username, databaseName, password.toCharArray())),                MongoClientOptions.builder().writeConcern(WriteConcern.ACKNOWLEDGED).build());        LOG.debug("MongoClient初始化完成,host:{},port:{}",host,port);        return mongoClient;    }    @Override    protected String getDatabaseName() {        // TODO Auto-generated method stub        return databaseName;    }    @Bean    public GridFsTemplate gridFsTemplate() throws Exception {        return new GridFsTemplate(mongoDbFactory(), mappingMongoConverter());    }    //DefaultMongoTypeMapper(null)     @Bean     public DefaultMongoTypeMapper typeMapper() throws ClassNotFoundException{        DefaultMongoTypeMapper mapper=new DefaultMongoTypeMapper(null);        return mapper;    }    @Override    public CustomConversions customConversions() {        // TODO Auto-generated method stub        return super.customConversions();    }    @Bean    @Override    public MappingMongoConverter mappingMongoConverter() throws Exception {        MappingMongoConverter converter=super.mappingMongoConverter();        converter.setTypeMapper(typeMapper());        return converter;    }    private static final Logger LOG = LoggerFactory.getLogger(MongoDBConfig.class);}