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( "${" + key.trim() + "}" );
cache.put(key,propValue);
}
catch (IllegalArgumentException ex) {
ex.printStackTrace();
}
}
return propValue;
}
}
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Spring xml的配置
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< property name = "systemPropertiesModeName" value = "SYSTEM_PROPERTIES_MODE_OVERRIDE" />
< property name = "ignoreResourceNotFound" value = "true" />
< property name = "locations" >
< list >
< value >classpath:props/${property-path}.properties</ value >
< value >classpath:important.properties</ value >
</ list >
</ property >
</ bean >
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在项目中使用
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String maxTimeInSecondsProp = PropertyConfig.getProperty( "maxTimeInSeconds" );
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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);
}
}
}
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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" );
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总结
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原文链接:http://www.cnblogs.com/ywqbj/p/5644657.html