How should the keyproperty attribute be configured in mybatis?

In MyBatis, the keyProperty attribute is typically used to specify a property name that will be used as the primary key field value in the insert statement, so that the generated primary key value can be set to that property after inserting data.

For example, let’s say you have an entity class called User, which includes a primary key attribute id. You can specify the id field as the primary key field value by setting keyProperty=”id” in the mapping file, as shown below:

<insert id="insertUser" parameterType="User" keyProperty="id">
    INSERT INTO user (id, username, password) VALUES (#{id}, #{username}, #{password})
</insert>

In the example above, keyProperty=”id” specifies the id field as the primary key field value. After inserting the data, MyBatis will set the generated primary key value to the id property of the User object.