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SpringBootApplication不会自动连接我的服务

spring-boot spring java

Genaut · 技术社区 · 7 年前

我的Spring Boot初始化有问题。我在一个简单的Spring Boot项目中使用了这种结构。

com.project.name
|----App.java (Annoted with @SpringBootApplication and Autowire MyCustomService)
|----com.project.name.service
     |----MyCustomService.java (Annoted with @Service)

scanBasePackages 属性,但不起作用。不管怎样,我有一个 @Bean 注释,我看到Spring Boot在应用程序中正确地注入了它,因为我可以在这样运行应用程序时看到日志:

2019-03-09 15:23:47.917  INFO 21764 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'jobLauncherTaskExecutor'
...
2019-03-09 15:23:51.775  INFO 21764 --- [       Thread-3] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'jobLauncherTaskExecutor'

my AppClass.java的基本方案

@SpringBootApplication(
        exclude = { DataSourceAutoConfiguration.class }
        //,scanBasePackages  = {"com.project.name.service"}
)

public class App{

    private static Logger logger = LoggerFactory.getLogger(App.class);

    @Autowired
    private static MyCustomService myCustomService;

    public static void main(String[] args) {
        SpringApplication.run(App.class, args);

        ...

        myCustomService.anyMethod();//NullPointerException
    }
}

@Bean
public ThreadPoolTaskExecutor jobLauncherTaskExecutor() {
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize(10);
    executor.setMaxPoolSize(20);
    executor.setQueueCapacity(25);
    return executor;
}

我想我遗漏了一些东西,但我正在阅读一些指南,没有找到任何关于这方面的内容。

1 回复 | 直到 7 年前

Genaut 7 年前

春天不能 @Autowire 静态字段,使用 ApplicationContext

@SpringBootApplication(
    exclude = { DataSourceAutoConfiguration.class }
    //,scanBasePackages  = {"com.project.name.service"}
)

public class App{

    private static Logger logger = LoggerFactory.getLogger(App.class);

    public static void main(String[] args) {
        ApplicationContext context = SpringApplication.run(App.class, args);

        MyCustomService myCustomService = (MyCustomService)context.getBean("myCustomService");
        ...

        myCustomService.anyMethod();
    }
}

或者你可以使用 CommandLineRunner

 @SpringBootApplication(
    exclude = { DataSourceAutoConfiguration.class }
    //,scanBasePackages  = {"com.project.name.service"}
)

public class App implements CommandLineRunner {

    private static Logger logger = LoggerFactory.getLogger(App.class);

    @Autowired
    private MyCustomService myCustomService;

    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
    public void run(String... args){
        myCustomService.anyMethod();
    }     
}