23.6 23.7 web environment web environment variable reading

One SpringApplication Will try to create the correct type ApplicationContext . By default, it will depend on whether you are developing a web Application and use AnnotationConfigApplicationContext or AnnotationConfigEmbeddedWebApplicationContext . Decide to use web The algorithm of environment is actually very simple （ Based on the existence of several classes ）, To override this default mechanism, use setWebEnvironment(boolean webEnvironment) .

in addition , It can also be taken by calling setApplicationContextClass(…​) What is used ApplicationContext Type to fully control . Usually in JUnit Use in test SpringApplication Called when setWebEnvironment(false) .

Add project parameters args1 234

New registration bean

@Component
public class MyBean {

    @Autowired
    public MyBean(ApplicationArguments args){
        boolean debug = args.containsOption("debug");
        List<String> files = args.getNonOptionArgs();
        // if run with "--debug logfile.txt" debug=true, files=["logfile.txt"]
    }
}

debug Run in mode