Recently, I am doing mail sending services. Normally SpringBoot integrates mail is very convenient, but there are new requirements: A request is sent by mailbox C, and B request is sent by mailbox D. That is to say, we need to configure two sets of sending services. .
Single instance
First, let's look at the configuration of a single service:
Don't worry about the others, we just need to inject the following when we use it:
If you are interested in how to load the configuration and initialize, you can understand the principle of spring-boot-autoconfigure.
Multi-instance
Since mail does not provide multiple data sources like a database, here we can only obtain it manually:
Here, by the way, a small feature, how to customize the display of the sender's name when sending mail:
Finally, when we use it, we only need to use different senders according to different requests.
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