Could not set unknown property 'mainClassName' for extension 'springBoot' of type org.springframework.boot.gradle.dsl.SpringBootExtension

Question

I have build.gradle like this and it works :

plugins {
    id 'org.springframework.boot' version '2.5.8' apply false
    ...
}
...
    springBoot {
        mainClassName = 'com.mir3.service.contactfileparser.Main'
    }

but if I upgrade spring boot version to 2.6.2 it fails with error:

plugins {
    id 'org.springframework.boot' version '2.6.2' apply false
    ...
}
...
    springBoot {
        mainClassName = 'com.mir3.service.contactfileparser.Main'
    }

Error text is:

A problem occurred evaluating root project 'myProject'.
> Could not set unknown property 'mainClassName' for extension 'springBoot' of type org.springframework.boot.gradle.dsl.SpringBootExtension.

How can I fix it ? What is the proper way to migrate from 2.5.8 to 2.6.2 ?

Answer 1

使用：

springBoot {
    mainClass = 'com.mir3.service.contactfileparser.Main'
}

SpringBootExtension有：

springBoot {
    mainClass = 'com.mir3.service.contactfileparser.Main'
}

mainClassName在 2.4.0 中已被弃用mainClass，并计划在 2.6.0 中删除。它已通过此提交删除：删除已标记为删除的已弃用代码