ArcSde SDK java开发所用到的四个jar包，分别是jpe_sdk.jar，jsde_sdk.jar，concurrent.jar，icu4j_3_2.jar。

jsde_sdk.jar Contains the ArcSDE Client, and Geometry Java API class files. jpe_sdk.jar Contains the ArcSDE Projection Engine Java API class files. concurrent.jar Provides standardized, efficient versions of utility classes commonly encountered in c