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This article mainly explains "how to operate Mybatis/Mybatis-Plus". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to operate Mybatis/Mybatis-Plus.

1. When the table field is set to varchar type, and all the int data are stored, the result set is not accurate when using this field as the query condition.

If the domain mapping object is set to String, an error will occur when you make a conditional query on this field.

The table structure is as follows:

I want to get a structure set like this.

However, when the input parameter is of type String, the following result occurs:

Solution

Solution 1: change the domain class->

Change to Integer mapping to solve the problem->

Option 2: change sql and use the CAST function to get the desired result->

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