It is better to teach people how to fish than to teach people how to fish If the activation is unsuccessful, you can use the online GUID website mentioned above to generate a new GUID and try again. Then click the Change license button to activate. Then enter an email address in the second input box (any email address that conforms to the format is fine). Then select the first option, Connect to online licensing service, enter the spliced online activation service in the first input box, (If the activation fails, you can change to a GUID and try again) How to useįirst, you need to install Jrebel in IDEA, the installation steps (Windows): File->Settings->Plugins, then search for Jrebel at the online installation plug-in, and then install it, and restart IDEA to take effect. After installing JRebel, activate it, Help->Jrebel->Activation. GUID online generation URL: Create GUIDS online . JRebel is very easy to use, and it is inseparable from everyone's support, so if conditions permit, it is recommended that you buy a genuine lisence. Because the usual development tool is IntelliJ IDEA, Jrebel is used when hot deploying project code. Because Jrebel charges a fee, it used to find a cracking method on the Internet (a common practice for Chinese people).The method found on the Internet is to enter an online activation service to activate it. Because of its simplicity and convenience, it has been used in this way.After opening IDEA this morning, I found that Jrebel activation is invalid. Later, I found out that the online activation service I found on the Internet was down, and the ping failed. Later, I searched various ways on the Internet, although I found another available online activation service. But through this problem that emerged this time. I also feel that I always rely on other people's services.After all, it is not a solution, so I thought about my own research and then made my own activation service.