设置properties的加载策略

动态加载:

1.需要configuration包:

    <!-- https://mvnrepository.com/artifact/commons-configuration/commons-configuration -->  
            <dependency>  
                <groupId>commons-configuration</groupId>  
                <artifactId>commons-configuration</artifactId>  
                <version>1.10</version>  
            </dependency>  

 2.示例:

    package cn.raysun.demo.shiro.other;  
      
    import java.io.File;  
      
    import org.apache.commons.configuration.ConfigurationException;  
    import org.apache.commons.configuration.PropertiesConfiguration;  
    import org.apache.commons.configuration.reloading.FileChangedReloadingStrategy;  
      
    /** 
     * {@code FileChangedReloadingStrategy}的测试类 
     * @author ray.sun 
     *  
     */  
    public class FileChangedReloadingStrategyTest {  
          
        //加载文件的频率  
        private static final long RELOAD_PERIOD = 10L;  
        private static PropertiesConfiguration config;  
          
        public static void main(String[] args) {  
              
            //获得当前类运行的classpath路径  
            String currentClassPath = ClassLoader.getSystemResource("").getPath();  
            initialize(currentClassPath + "reloadstrategy-test.properties");  
              
            while(true){  
                try {  
                    System.out.println("user=" + config.getString("user.loginName"));  
                    Thread.sleep(5000);  
                } catch (InterruptedException e) {  
                    e.printStackTrace();  
                }  
            }  
        }  
          
        //初始化配置文件和文件加载策略  
        private static void initialize(String filePath){  
            try {             
                FileChangedReloadingStrategy fileChangedReloadingStrategy = new FileChangedReloadingStrategy();  
                //设置扫描文件的最小时间间隔  
                fileChangedReloadingStrategy.setRefreshDelay(RELOAD_PERIOD);  
                  
                //设置加载策略  
                config = new PropertiesConfiguration(new File(filePath));  
                config.setReloadingStrategy(fileChangedReloadingStrategy);  
                  
            } catch (ConfigurationException e) {  
                e.printStackTrace();  
            }         
        }  
          
    }