我是Spring的新手,最近几天一直在学习。现在我正在尝试使用它做些事情。似乎在Spring Boot中,一切都已经改变了。 没有applicationContext文件,我应该使用@Bean。好吧,在教程中这段代码可以工作,但是对于我来说却失败了。我错过了什么?
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
控制器:
@RestController
public class GreetingController {
private final Test test;
@Autowired
public GreetingController(Test test){
this.test = test;
}
@RequestMapping("/greeting")
public String greeting(@RequestParam(value = "name", defaultValue = "World") String name) {
return "greeting" + test.getTest();
}
}
class Test {
public String getTest() {
return "tetst";
}
}
错误:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [hello.Test] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1301)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1047)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
... 18 more
我假设Bean必须被定义...但在教程中没有Bean的定义...或者我没看到它。
Application
和GreetingController
在哪个包中?@SpringBootApplication
扫描控制器和组件,但它们必须在同一个包或更低级别的包中。 - spencergibb