FileChangedReloadingStrategy的简单使用

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需求：当采用配置与代码分离时，如果只是修改配置文件（比如properties文件），无需重启服务器

方案：采用commons-configuration-1.10.jar的org.apache.commons.configuration.reloading.FileChangedReloadingStrategy

来实现动态加载配置文件的问题

测试：step1: 启动main方法

step2: 修改当前类的class文件所在的目录下的reloadstrategy-test.properties文件里面的属性user.loginName

的值并保存文件，可以看到输出已更新为最新的值

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示例代码采用Maven依赖:

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

代码：

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();}}}

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