SpringBoot注入Bean的四种方式总结

目录

• 统一测试类与config类
• 1. 启动类注入Bean
• 2.启动类扫描@ComponentScan
• 3.启动类@EnableConfigurationProperties
• 4.启动类@Import

统一测试类与config类

yml

student:
  red: dou

config 

@Configuration注解 与 @Component注解都可以。

@Data
@Configuration
@ConfigurationProperties(prefix = "student")  // 文件上传 配置前缀file.oss
public class MinIOConfigProperties implements Serializable {
 
    private String red;
 
}

@Data
@Component
@ConfigurationProperties(prefix = "student")  // 文件上传 配置前缀file.oss
public class MinIOConfigProperties implements Serializable {
 
    private String red;
 
}

test

@SpringBootTest
class SpringBoojavascripttTest01ApplicationTests {
 
    @Autowired
    private MinIOConfigProperties minIOConfhttp://www.devze.comigProperties;
 
 
    @Test
    void contextLoads() {
        // 获取AccessKey值
        String accessKey = minIOConfigProperties.getRed();
        System.out.println(accessKey);
    }
 
}

1. 启动类注入Bean

@SpringBootApplication
public class SpringBootTest01Application {
 
    public static void main(String[] args) {
        SpringApplication.run(SpringBootTest01Application.class, args);
    }
 
 
    @Bean
    public MinIOConfigProperties minIOConfigProperties() {
        return new MinIOConfigProperties();
    }
 
 
}
 

2.启动类扫描@ComponentScan

@ComponentScan(basePackages = "com.ma.config")
@SpringBootApplication
public class SpjsringBootTest01Application {
 
    public static void main(String[] args) {
        SpringApplication.run(SpringBootTest01Application.class, args);
    }
 
}
 

3.启动类@EnableConfigurationProperties

@SpringBootApplication
js@EnableConfigurationProperties(MinIOConfigProperties.class)
public class SpringBoohttp://www.devze.comtTest01Application {
 
    public static void main(String[] args) {
        SpringApplication.run(SpringBootTest01Application.class, args);
    }
 
}

4.启动类@Import

@SpringBootApplication
@Import(MinIOConfigProperties.class)
public class SpringBootTest01Application {
 
    public static void main(String[] args) {
        SpringApplication.run(SpringBootTest01Application.class, args);
    }
 
}

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