java - 来自命令行的 Spring Boot 参数

Question

我有带有参数的 SpringBootApplication

public class RocksdbBootApp {
    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(RocksdbBootApp.class);
        app.setDefaultProperties(Collections.singletonMap("server.port", args[0]));
        app.run(args);
    }
}

如何访问 RestController 中的参数？

@Slf4j
@RestController
@RequestMapping("/api/rocks")
public class RocksApi {
    public RocksApi(KeyValueRepository<String, String> rocksDB) {
        System.out.println(args[0]);
    }
}

Answer 1

要访问传递给应用程序的参数，您可以使用 ApplicationArguments并将其注入(inject)到您的 Controller 中:

@Slf4j
@RestController
@RequestMapping("/api/rocks")
public class RocksApi {

    private final ApplicationArguments arguments;

    @Autowired //can be ommited in new versions of Spring
    public RocksApi(final ApplicationArguments arguments) {
        this.arguments = arguments;
    }

    public RocksApi(KeyValueRepository<String, String> rocksDB) {
        String[] args = arguments.getSourceArgs();
        System.out.println(args[0]);
    }
}