GIS related java jar packages

java develops recent projects that require gis-related functions, as follows:

  • determine whether the point is within the polygon
  • conversion between different coordinate systems

are there any related jar packages that can achieve related functions? it seems that there is a jts jar package, but it is said that the speed is very slow. Are there any other related jar packages?

Mar.21,2021
The speed of

JTS is not slow. Others are libraries written in CPP and encapsulated by JAVA


it is recommended that you do it directly in spatialite, c, not slow. Just need to find the corresponding interface, cross-platform, and do not need too many additional files.
in addition, this is basically done in gdal encapsulation. If you want pure java, you can refer to the following geoserver

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