Java日志组件logback使用：加载非类路径下的配置文件并设置定时更新

logback加载非类路径下的logback配置文件并设置定时更新

定时重新加载logback配置文件

logback.xml

<configuration  scan="true" scanPeriod="30 seconds">  
....  
configuration>

配置说明：
- scan: 设置为true,代表会在指定的时间内重新加载日志配置文件
- scanPeriod:当scan=true时，日志配置文件会在指定的单位时间内重新加载，默认是每分钟会重载一次。
- scanPeriod的配置说明:
时间单位：milliseconds, seconds, minutes , hours

eg:

5分钟： <configuration  scan="true" scanPeriod="5 minutes">
1小时:  <configuration  scan="true" scanPeriod="1 hours">

加载非类路径下的logback.xml配置文件

主方法中调用如下代码:

//logback.xml的路径名
File file = new File(System.getProperty("user.dir") + "/conf/logback.xml");
LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
JoranConfigurator joranConfigurator = new JoranConfigurator();
joranConfigurator.setContext(loggerContext);
loggerContext.reset();
try {
    joranConfigurator.doConfigure(file);
} catch (Exception e) {
    System.out.println(String.format("Load logback config file error. Message: ", e.getMessage()));
}
StatusPrinter.printInCaseOfErrorsOrWarnings(loggerContext);

剥离代码为一个类:

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.joran.JoranConfigurator;
import ch.qos.logback.core.util.StatusPrinter;
import org.slf4j.LoggerFactory;

import java.io.File;

/**
 * Created by xuyh at 2017/11/20 14:32.
 */
public class LogbackInit {
    /**
     * 设置logback.xml配置文件并加载
     *
     * @param configFilepathName 配置文件路径名
     */
    public static void initLogback(String configFilepathName) {
        File file = new File(configFilepathName);
        LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
        JoranConfigurator joranConfigurator = new JoranConfigurator();
        joranConfigurator.setContext(loggerContext);
        loggerContext.reset();
        try {
            joranConfigurator.doConfigure(file);
        } catch (Exception e) {
            System.out.println(String.format("Load logback config file error. Message: ", e.getMessage()));
        }
        StatusPrinter.printInCaseOfErrorsOrWarnings(loggerContext);
    }
}

调用

//初始化logback日志配置文件
LogbackInit.initLogback(System.getProperty("user.dir") + "/conf/logback.xml");