我在Spring上配置课。我尝试用依赖注入的配置Map来替换硬编码的字符串。

@Configuration
@Component
public class BwlConfiguration {

    @Resource(name="loadParameters")
    private Map<ConfigEnum, String> conf;

    private String address;

    public BwlConfiguration() {
        address = conf.get(SPI_BL);
    }
...
}

提供confMap的类：

@Configuration
@Component
public class ConfigLoader {

    @Resource(name="returnEnv")
    private Map<String, String> env;

    @Bean
    public Map<ConfigEnum, String> loadParameters() throws ParameterNotSetException{
        ....
        return parameterMap;
    }

提供环境Map的类：

@Configuration
public class EnvConf {

    @Bean
    public Map<String, String> returnEnv(){
        return System.getenv();
    }   
}

当我运行程序时，nullpointerexception被抛出 address = conf.get(SPI_BL); 线路。我试着替换 @Component 由 @Import(...class) ，同样的结果，它失去了注射点。我是不是用错了这些注解？谢谢