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How SpringBoot uses RocketMQ gracefully

MQ is a cross-process communication mechanism for upstream and downstream messaging.In traditional Internet architecture, MQ is often used to decouple upstream and downstream. For example, when system A communicates with system B, such as a system announcement issued by system A, system B can subscribe to the channel for system announcement synchronization. During the whole process, system A does not relate to whether system B...

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Basic knowledge of json

Basic knowledge of json: JavaScript Object natation -js Object Representation json basically says: 1. Representation object: {} wraps key-value pairs 2. Represents arrays: [] General wrapped objects 3. Traverse: for...in.. Give an example: var user1 = {"username":"Li Bai","password":"123456"}; var user2 = {"username":"Du Fu","password":"123456"}; var users = [user1,user2]; java–>json: 1. steps 2. notes 3. Other...