下载Java应用服务器SDK和例子
https://docs.agora.io/cn/2.1.1/download
http://download.agora.io/sdk/release/Agora_Signaling_Server_SDK_Java_1_2_1_beta.zip
安装jdk8，
还有ideaIU-2018.1.1.win
https://download.jetbrains.8686c.com/idea/ideaIU-2018.1.1.win.zip
双击idea64，点Import，选中 Agora_Signaling_Server_SDK_Java\samples\Agora-Signaling-Tutorial-Java\build.gradle
刷新之后，右键点lib菜单选择“Add As Library ...”,"Add To Module:"选择“signal_main”
然后选择菜单build
然后到文件SingleSignalObjectMain.java里main方法里，鼠标右键点“Run SingleSignalOb....main()”
打包jar直接运行的方法参考 https://blog.csdn.net/asd1098626303/article/details/60868123#t2