曾饺

摘要： 首先，先了解向上转型和向下转型： public class Person { private Integer age; private String name; } public class Student extends Person { private String student_no; } 阅读全文

摘要： docker-compose.yml 和项目目录同级 version: '2' services: parking-client-mng: build: context: ./ dockerfile: ./parking-client-mng/Dockerfile restart: always v 阅读全文