我有一个使用Spring Boot 0.5.0.M5的项目设置。
在我尝试的一个配置文件中,@Autowire Environment
但失败并带有NullPointerException
.
这是我到目前为止所拥有的:
应用程序.java
@EnableAutoConfiguration
@Configuration
@ComponentScan
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
我正在尝试的JpaConfig.java@Autowire Environment
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(basePackages = "com.ui.persistence.repository")
public class JpaConfig {
private static final String DATABASE_DRIVER = "db.driver";
private static final String DATABASE_PASSWORD = "db.password";
private static final String DATABASE_URL = "db.url";
private static final String DATABASE_USERNAME = "db.username";
private static final String HIBERNATE_DIALECT = "hibernate.dialect";
private static final String HIBERNATE_SHOW_SQL = "hibernate.show_sql";
private static final String ENTITYMANAGER_PACKAGES_TO_SCAN
= "entitymanager.packages.to.scan";
@Autowired
private Environment env;
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty(DATABASE_DRIVER));
dataSource.setUrl(env.getProperty(DATABASE_URL));
dataSource.setUsername(env.getProperty(DATABASE_USERNAME));
dataSource.setPassword(env.getProperty(DATABASE_PASSWORD));
return dataSource;
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean
= new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(dataSource());
entityManagerFactoryBean.setPersistenceProviderClass(
HibernatePersistence.class);
entityManagerFactoryBean.setPackagesToScan(
env.getProperty(ENTITYMANAGER_PACKAGES_TO_SCAN));
entityManagerFactoryBean.setJpaProperties(hibernateProperties());
return entityManagerFactoryBean;
}
}
我正在尝试加载在属性文件中配置的数据库属性。但是,Environment
没有注入 并且代码失败并显示NullPointerException
. 我在 XML 文件中没有任何配置。
对于我这样配置的属性文件PropertySourcesPlaceholderConfigurer
:
@Configuration
@PropertySource("classpath:database.properties")
public class PropertyConfig {
@Bean
public static PropertySourcesPlaceholderConfigurer propertyPlaceHolderConfigurer() {
return new PropertySourcesPlaceholderConfigurer();
}
}
我试过 swapping @Autowired
,@Resource
但@Inject
到目前为止没有任何效果。将不胜感激任何帮助。谢谢。