在 Spring Boot 框架中,要创建一个非Web应用程序(纯Java程序)
main方法运行,不启动tomcat,main方法执行结束,程序就退出了;
方式一
1、SpringBoot开发纯Java程序,应该采用如下的起步依赖:
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| <!-- Springboot开发java项目的起步依赖 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> |
2、直接在main方法中,根据SpringApplication.run()方法获取返回的Spring容器对象,再获取业务bean进行调用;
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| public static void main(String[] args) { ConfigurableApplicationContext context = SpringApplication.run(Application.class, args); UserService userService = (UserService)context.getBean("userService"); String hello = userService.getMessage("Hello, Spring Boot"); System.out.println(hello); } |
方式二
1、SpringBoot开发纯Java程序,应该采用如下的起步依赖:
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| <!-- Springboot开发java项目的起步依赖 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> |
2、Spring Boot 的入口类实现CommandLineRunner接口;
3、覆盖CommandLineRunner接口的run()方法,run方法中编写具体的处理逻辑即可;
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| @Autowired private UserService userService; @Override public void run(String... args) throws Exception { String msg = userService.getMessage("zhangshan"); System.out.println(msg); } |