log4j2参数从springboot配置文件中读取

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    public static void main(String[] args) {
//        ConfigurableApplicationContext ac =
//                SpringApplication.run(Main.class, args); // 使用下一行代码替换
        ConfigurableApplicationContext ac = new SpringApplicationBuilder(Main.class)
                .web(false)
                .initializers((ConfigurableApplicationContext context) -> {
                    System.setProperty("serverId", context.getEnvironment().getProperty("serverId"));
                })
                .run(args);
    }

<Property name="logdir">/logs/server_${sys:serverId}</Property>

<Routing name="Routing">
<RollingFile></RollingFile> <!-- Routing里不能加RollingFile 会报错-->
</Routing>

转载于:https://my.oschina.net/corleone/blog/2236757