问题在Java application.properties文件

问题描述：

我想从性能，读取数据库中值，所以出于同样的原因，我在春天用@PropertySource，但它抛出FileNotFoundException异常问题在Java application.properties文件

@Configuration 
@EnableJpaRepositories(basePackages = { 
     "com.manju.springdata.repository" 
}) 
@EnableTransactionManagement 
@EnableWebMvc 
@ComponentScan(basePackages = "com.manju.springdata.*") 
@PropertySource("classpath:/application.properties") 
public class PersistenceContext { 

    @Value("${db.driver}") 
    private String dbDriver; 

    @Value("${db.url}") 
    private String dbURL; 

    @Value("${db.username}") 
    private String dbUserName; 

    @Value("${db.password}") 
    private String dbPassword; 

    @Bean(destroyMethod = "close") 
    DataSource dataSource(Environment env){ 
     BoneCPDataSource dataSource = new BoneCPDataSource(); 
     //dataSource.setDriverClass(env.getRequiredProperty("db.driver")); 
     dataSource.setDriverClass(dbDriver); 
     dataSource.setJdbcUrl(dbURL); 
     dataSource.setUsername(dbUserName); 
     dataSource.setPassword(dbPassword); 
     return dataSource; 
    } 

    @Bean 
    public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() { 
      return new PropertySourcesPlaceholderConfigurer(); 
    } 
    }

我的项目结构如下，

我收到以下错误，

Caused by: java.io.FileNotFoundException: class path resource [application.properties] cannot be opened because it does not exist 
     at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:172) ~[spring-core-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.core.io.support.EncodedResource.getInputStream(EncodedResource.java:153) ~[spring-core-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.core.io.support.PropertiesLoaderUtils.fillProperties(PropertiesLoaderUtils.java:98) ~[spring-core-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.core.io.support.PropertiesLoaderUtils.fillProperties(PropertiesLoaderUtils.java:72) ~[spring-core-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.core.io.support.PropertiesLoaderUtils.loadProperties(PropertiesLoaderUtils.java:58) ~[spring-core-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.core.io.support.ResourcePropertySource.<init>(ResourcePropertySource.java:84) ~[spring-core-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.context.annotation.ConfigurationClassParser.processPropertySource(ConfigurationClassParser.java:360) ~[spring-context-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:254) ~[spring-context-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:231) ~[spring-context-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:198) ~[spring-context-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:167) ~[spring-context-4.2.0.RELEASE.jar:4.2.0.RELEASE] 
     ... 57 common frames omitted

如何访问我的属性文件值，我的代码出了什么问题？任何建议

从您的'@PropertySource（“classpath：/application.properties”）中移除'/'，尝试它。 – Blank

最初我只是试过。它不工作@Reno – Vinod

进入发生异常的代码，并逐步调试它为文件路径的实际值。 – Blank

答

问题是与您的文件夹结构。 resource文件夹应该在main之下，而不是java。有关maven项目的默认结构，请参阅this。请移动资源文件夹或将值更改为classpath:/resources/application.properties。

问题在Java application.properties文件

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