Error deploying my Spring boot project on Heroku (invalid target release)
问题 // Pom.xml file 4.0.0 org.springframework.boot spring-boot-starter-parent 2.3.3.RELEASE com.SpringBootJavaProject LearningProject 0.0.1-SNAPSHOT LearningProject Demo project for Spring Boot <properties> <java.version>14</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId