转自：https://blog.csdn.net/u010523770/article/details/54585883
新版本的mongodb的驱动包是依赖bson.jar和mongodb_driver_core.jar的 官网上有提示：
Note: mongodb-driver requires the following dependencies: bson and mongodb-driver-core
去看一下 ，然后对应的地方有两个包的下载，导进你的方法就ok了
下载地址：
mongodb-driver-3.0.1.jar
mongodb-driver-core-3.0.1.jar
bson-3.0.1.jar
https://oss.sonatype.org/content/repositories/releases/org/mongodb/mongodb-driver/3.0.1/
https://oss.sonatype.org/content/repositories/releases/org/mongodb/mongodb-driver-core/3.0.1/
https://oss.sonatype.org/content/repositories/releases/org/mongodb/bson/3.0.1/