题干:importcom.mongodb.MongoClient;……//这里省略其他需要导入的包publicclassMongoDBJDBC{publicstaticvoidmain(Stringargs[]){try{//连接到mongodb服务MongoClientmongoClient=new1.("localhost",27017);//连接到数据库DBdb=mongoClient.2.("test");System.out.println("Connecttodatabasesuccessfully");boolean...