你能给我一个弹簧启动中基元类型依赖注入的例子吗？我已经尝试过一次，但是作为我的自定义 Bean 定义类的 TestConfiguration 无法检测到或无法被 Spring 引导应用程序识别。这是我的代码，
引擎类
package com.test2.projectTest;
import org.springframework.stereotype.Component;
@Component
public class Engine {
private String msg;
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}
测试配置
package com.test2.projectTest;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class TestConfiguration {
@Bean("engine")
public Engine engine(){
Engine engine = new Engine();
engine.setMsg("Message is injected");
return engine;
}
}
弹簧主要应用
package com.test2.projectTest;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
public class ProjectTestApplication {
public static void main(String[] args) {
SpringApplication.run(ProjectTestApplication.class, args);
}
}
/JUnit Test
package com.test2.projectTest;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.context.TestConfiguration;
import org.springframework.context.ApplicationContext;
import
org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class ProjectTestApplicationTests {
@Test
public void contextLoads() {
ApplicationContext apc = new
AnnotationConfigApplicationContext(TestConfiguration.class);
Engine e = (Engine) apc.getBean("engine");
e.getMsg();
}
}
// Output - org.springframework.beans.factory.NoSuchBeanDefinitionException:
No bean named 'engine' available
请提出上述问题的任何解决方案
在主类中添加@componentscan注释并提供引擎类包，它应该可以工作