Question

我是Spring-Boot应用程序的新手，并尝试在Spring Boot应用程序中读取外部属性文件，该应用程序位于我的资源文件夹中，除了application.properties 之外，但是会出现以下异常，

#include<stdio.h>
#include<cs50.h>
#include<math.h>
int main()
{
 float n;
  do{ printf("change owed?\n");
  n = get_float();
  }while (n<0);
 int z,a,b,c,d;
 z = n*100;
 a = z/25;
 b = (z%25)/10;
 c = ((z%25)%10)/5;
 d = (((z%25)%10)%5)/1;


if(z>25)
{
printf("you will have %i quarter's'\n",a);
}

else if(z>10)
{printf("you will have %i dime's'\n",b);
}

 else if(z>5)
 {printf("you will have %i nickel's'\n",c);
 }

 else if(z>1)
 {printf("you will have %i pennie's'\n",d);
 }

{if(a>10)
{
 printf("you will have %i dime's'\n",b);
}
else if(a>5)
{printf("you will have %i nickel's'\n",c);
}
else if(a>1)
{printf("you will have %i pennie's'\n",d);
}
{if(b>5)
{printf("you will have %i nickel's'\n",c);
}
else if(b>1)
{printf("you will have %i pennie's'\n",d);
}
{if(c>1)
{printf("you will have %i pennie's'\n",d);
}}}}


printf("you will get %i coin's'\n",a+b+c+d);
}

我的Config类如下，

Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.test.config.MyInetgrationApplicationConfig]; nested exception is java.io.FileNotFoundException: Could not open ServletContext resource [/myIntegration.properties]
2017-09-06 17:27:04.866 ERROR 10512 --- [ost-startStop-1] o.s.b.f.s.DefaultListableBeanFactory     : Destroy method on bean with name 'org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory' threw an exception

java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@225fa519: startup date [Wed Sep 06 17:27:04 IST 2017]; root of context hierarchy
    at org.springframework.context.support.AbstractApplicationContext.getApplicationEventMulticaster(AbstractApplicationContext.java:414) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.context.support.ApplicationListenerDetector.postProcessBeforeDestruction(ApplicationListenerDetector.java:97) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:253) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]

我的应用类，

@Configuration
@PropertySource(name="myIntegrationProperties", value ="myIntegration.properties")
public class MyInetgrationApplicationConfig {

    /**
     * Rest template.
     *
     * @return the rest template
     */
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }

    @Value("${datasource.name}")
    private String dataSourceName;

    @Value("${datasource.driver}")
    private String dataSourceDriver;

    @Value("${datasource.url}")
    private String dataSourceUrl;

    @Value("${datasource.username}")
    private String dataSourceUserName;

    @Value("${datasource.password}")
    private String dataSourcePassword;

    @Bean
    @Primary
    public DataSource dataSource() {
        DataSource dataSource = new DataSource();
        dataSource.setName(dataSourceName);
        dataSource.setUrl(dataSourceUrl);
        dataSource.setDriverClassName(dataSourceDriver);
        dataSource.setUsername(dataSourceUserName);
        dataSource.setPassword(dataSourcePassword);

        return dataSource;
    }
}

Answer 1

您需要添加claapath：

@PropertySource("classpath:myIntegration.properties")

myIntegration.properties文件应放在/ src / main / resources下，以便在运行时classpath上可用。

Answer 2

尝试为您的资源文件路径提供类路径引用，如下所示：

Answer 3

我无法使用@Value("${datasource.name}")获取值，所以我在自动装配Environment之后尝试使用environment.getProperty("datasource.name")它为我工作。以下是示例代码

    @Configuration
    @PropertySource("classpath:myIntegration.properties")
    public class MyInetgrationApplicationConfig {

        @Autowired
        private Environment environment;

        @Bean
        @Primary
        public DataSource dataSource() {
            DataSource dataSource = new DataSource();
            dataSource.setName(environment.getProperty("datasource.name"));
            dataSource.setUrl(environment.getProperty("datasource.url"));
            .
            .
            .
            .
            return dataSource;
        }
   }

在spring boot中使用@PropertySource读取属性文件时出错

3 个答案: