Log4j2:以编程方式创建在文件名中带有时间戳的文件附加器

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.appender.FileAppender;
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.core.LayoutFactory;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy;
import org.apache.logging.log4j.core.appender.rolling.RollingFileAppender;
import org.apache.logging.log4j.core.appender.rolling.TimeBasedTriggeringPolicy;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.ConfigurationFactory;
import org.apache.logging.log4j.core.config.ConfigurationSource;
import org.apache.logging.log4j.core.config.Configurator;
import org.apache.logging.log4j.core.config.builder.api.AppenderComponentBuilder;
import org.apache.logging.log4j.core.config.builder.api.ComponentBuilder;
import org.apache.logging.log4j.core.config.builder.api.ConfigurationBuilder;
import org.apache.logging.log4j.core.config.builder.api.LayoutComponentBuilder;
import org.apache.logging.log4j.core.config.builder.api.RootLoggerComponentBuilder;
import org.apache.logging.log4j.core.config.builder.impl.BuiltConfiguration;
import org.apache.logging.log4j.core.layout.PatternLayout;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Properties;

public class Log4j2Example {

    private static final Logger LOGGER = LogManager.getLogger(Log4j2Example.class);

    public static void main(String[] args) {
        // 加载Log4j2配置文件
        configureLog4j2();

        // 记录日志
        LOGGER.info("This is a log message.");
    }

    private static void configureLog4j2() {
        // 创建Log4j2配置
        ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();

        // 创建文件附加器
        AppenderComponentBuilder appenderBuilder = builder.newAppender("fileAppender", "File")
                .addAttribute("fileName", "logs/mylog_" + System.currentTimeMillis() + ".log")
                .addAttribute("append", true);

        // 创建日志布局
        LayoutComponentBuilder layoutBuilder = builder.newLayout("PatternLayout")
                .addAttribute("pattern", "%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n");

        // 将日志布局添加到文件附加器
        appenderBuilder.add(layoutBuilder);

        // 将文件附加器添加到根日志记录器
        builder.add(appenderBuilder);

        // 设置根日志记录器的日志级别
        builder.add(builder.newRootLogger(org.apache.logging.log4j.Level.INFO)
                .add(builder.newAppenderRef("fileAppender")));

        // 构建Log4j2配置
        Configuration configuration = builder.build();

        // 初始化Log4j2
        LoggerContext context = Configurator.initialize(configuration);

        // 更新Log4j2配置
        context.updateLoggers(configuration);
    }
}