Keane Jarvi publishes a LGPL licensed Linux and cross-platform COMM API at http://www.rxtx.org/.
An excellently performing package for a large variety of platforms is the SerialPort package from Solutions Consulting at http://www.serialio.com. Using this package, poll cycles of less than 10 ms can be achieved!
Perhaps jSSC is a good javax.comm implementation too.
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您可以尝试 Jamod。我从未使用过它，但我的一位同事前段时间使用过它，他对此感到满意。
You can try Jamod. I never used it, but a colleague of mine used it sometime ago and he was pleased with it.
试试这个：
http://sourceforge.net/projects/jamod/files/jamod/ 1.2/
顺便说一句，您可以使用JDGUI查看任何jar文件的来源。
Try this one:
http://sourceforge.net/projects/jamod/files/jamod/1.2/
By the way, you can use JDGUI to see the sources of any jar file.
FieldKit 是付费且开源的，支持包括 Java 在内的多种语言
jModbus 项目
j2mod 是 jamod 的一个分支
如果您使用的是 Modbus RTU（串行）Java 通信 API 是必需的；从 FieldKit 文档 中窃取：
也许 jSSC 也是一个很好的 javax.comm 实现。
FieldKit is paid and open source, and haves support for several languages including Java
jModbus Project
j2mod is a fork of jamod
If you are using Modbus RTU (Serial) Java Communications API is needed; stolen from FieldKit documentation:
Perhaps jSSC is a good javax.comm implementation too.
最近还有另一个解决方案 modbus4j。
There is another one recent solution modbus4j.