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This article mainly explains "using Mapper to add, delete, modify and check a single table". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "use Mapper to add, delete, modify and check a single table".

Need to introduce dependencies in the pom file

Mysql mysql-connector-java runtime tk.mybatis mapper-spring-boot-starter 1.2.3 Org.springframework.boot spring-boot-starter-jdbc

Mode of use:

1. Inherit Mapper in the mapper interface class

Note: normally, when we use mapper.xml to perform an insert operation, we will have the following configuration:

But these are not available in generic mapper, and we need to make additional configuration:

Public class UmsMembers {@ Id @ GeneratedValue (strategy= GenerationType.IDENTITY) / / Primary key return policy? @ Column (name = "id") private String id

Note: replace the previously used mapper scanner

A scanner using tk mapper (generic mapper) is required, otherwise an error that cannot find the generic mmaper method will be reported when the generic mapper method is called

Replace the original mapperscan package

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