在运行时更改Log4J2输出文件

<Appenders>
    <File name="FileAppender" fileName="logs/application.log">
        <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5level %logger{36} - %msg%n" />
    </File>
</Appenders>

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class MyClass {
    private static final Logger logger = LogManager.getLogger(MyClass.class);
    // ...
}

import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.Configurator;

public class MyClass {
    private static final Logger logger = LogManager.getLogger(MyClass.class);
    
    public static void main(String[] args) {
        // 获取LoggerContext和Configuration
        LoggerContext context = (LoggerContext) LogManager.getContext(false);
        Configuration config = context.getConfiguration();
        
        // 修改输出文件路径
        config.getAppender("FileAppender").getConfiguration().removeAppender("FileAppender");
        config.getAppender("FileAppender").getConfiguration().addAppender(
            FileAppender.newBuilder()
                .withName("FileAppender")
                .withFileName("logs/another.log")
                .withLayout(PatternLayout.newBuilder().withPattern("%d{yyyy-MM-dd HH:mm:ss} [%t] %-5level %logger{36} - %msg%n").build())
                .build()
        );
        
        // 重新配置LoggerContext
        context.updateLoggers(config);
        
        // 记录日志
        logger.info("This log message will be written to another.log");
    }
}