Unable to find a single main class from the following candidates

关于start-class，spring boot官方手册是这么说明的：

The plugin rewrites your manifest, and in particular it manages the Main-Class and Start-Class entries, so if the defaults don't work you have to configure those there (not in the jar plugin). The Main-Class in the manifest is actually controlled by the layout property of the boot plugin, e.g.

<build>
  ...
  <plugins>
    ...
    <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <version>1.4.0.RELEASE</version> <configuration> <mainClass>${start-class}</mainClass> <layout>ZIP</layout> </configuration> <executions> <execution> <goals> <goal>repackage</goal> </goals> </execution> </executions> </plugin> ... </plugins> ... </build>

所以，当你的默认方式不好用的时候，在properties中，加入一个start-class的属性，用于告诉spring boot maven plugin哪个类是入口类即可。