udp可以用Java Net实现 示例在这里https://github.com/kavahub/learnjava/tree/main/core-java/core-java-net/src/main/java/io/github/kavahub/learnjava/udp ,也可以用Java NIO实现,示例在这里https://github.com/kavahub/learnjava/tree/main/core-java/core-java-nio/src/main/java/io/github/kavahub/learnjava/server/udp
我自己写的,希望对你有帮助https://blog.csdn.net/huangluyang123/article/details/120945469