SpringBoot中使用MongoDB，无废话超简洁

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>

spring: 
    data:
      # MongoDB数据库
      mongodb:
        host: 127.0.0.1 # 连接地址
        port: 27017 # 端口
        database: test # 连接数据库
        username: root # 用户名
        password: "123456" # 密码
        authentication-database: admin # 验证数据库（可选）

@Autowired
private MongoTemplate mongoTemplate;

Criteria criteria = Criteria.where("key").is("测试");
Query query = Query.query(criteria);
MongoTest one = mongoTemplate.findOne(query, MongoTest.class);

Query query = Query.query(new Criteria()).skip(0).limit(10);
List<MongoTest> mongoTests = mongoTemplate.find(query, MongoTest.class);

MongoTest test = new MongoTest();
test.setKey("测试1");
test.setValue("值1");
MongoTest test1 = mongoTemplate.insert(test, "test");

Criteria criteria = new Criteria();
criteria.orOperator(Criteria.where("key").is("测试"), Criteria.where("key").is("测试1"));
Query query = Query.query(criteria);
Update update1 = Update.update("value", "批量更新");
UpdateResult test = mongoTemplate.updateMulti(query, update1, "test");

Criteria criteria = Criteria.where("key").is("测试").and("value").is("批量更新");
Query query = Query.query(criteria);
DeleteResult remove = mongoTemplate.remove(query,"test");

mongoTemplate.createCollection("createCollection");

mongoTemplate.dropCollection("createCollection");

boolean exists = mongoTemplate.collectionExists("createCollection");

long count = mongoTemplate.count(new Query(), "test");