本文将介绍两种Spring读取property配置文件的方法,接下来看看具体内容。
一、通过Spring工厂读取
示例:
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public class PropertyConfig { private static AbstractBeanFactory beanFactory = null ; private static final Map<String,String> cache = new oncurrentHashMap<>(); @Inject public PropertyConfig(AbstractBeanFactory beanFactory) { this .beanFactory = beanFactory; } /** * 根据key获取配置文件的Value * @param key * @return */ public static String getProperty(String key) { String propValue = "" ; if (cache.containsKey(key)){ propValue = cache.get(key); } else { try { propValue = beanFactory.resolveEmbeddedValue( "${" + key.trim() + "}" ); cache.put(key,propValue); } catch (IllegalArgumentException ex) { ex.printStackTrace(); } } return propValue; } } |
Spring xml的配置
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< property name = "systemPropertiesModeName" value = "SYSTEM_PROPERTIES_MODE_OVERRIDE" /> < property name = "ignoreResourceNotFound" value = "true" /> < property name = "locations" > < list > < value >classpath:props/${property-path}.properties</ value > < value >classpath:important.properties</ value > </ list > </ property > </ bean > |
在项目中使用
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String maxTimeInSecondsProp = PropertyConfig.getProperty( "maxTimeInSeconds" ); |
二、直接使用spirng程序代码读取项目的配置文件方法
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import org.springframework.core.io.ClassPathResource; import org.springframework.core.io.Resource; import org.springframework.core.io.support.PropertiesLoaderUtils; import org.springframework.core.io.FileSystemResource; public class Test { /** * @param args */ public static void main( String[] args ) { String configFile = "D:/test/application.properties" ; //如果配置文件在classpath目录下可以使用ClassPathResource对象 //Resource resource = new ClassPathResource("/application.properties"); Resource resource = new FileSystemResource( configFile ); try { Properties property = PropertiesLoaderUtils.loadProperties(resource); String driver = property.getProperty( "jdbc.driver" ); String url = property.getProperty( "jdbc.url" ); String userName = property.getProperty( "jdbc.username" ); String password = property.getProperty( "jdbc.password" ); } catch (IOException e1) { //log.error("read config file failed", e1); } } } |
如果配置文件在classpath目录下可以使用ClassPathResource对象
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Resource resource = new ClassPathResource( "/application.properties" ); |
总结
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原文链接:http://www.cnblogs.com/ywqbj/p/5644657.html