使用spring工厂读取property配置文件示例代码

时间:2021-12-16 02:33:48

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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<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
  <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