Spring Boot动态修改日志级别_springboot2.x logging.level 动态刷新

一 点睛

1 loggers端点

该端点将为我们提供动态修改Spring Boot应用日志级别的强大功能。该功能的使用非常简单，它依然延续了Spring Boot自动化配置的实现，所以只需要在引入了spring-boot-starter-actuator依赖的条件下就会自动开启该端点的功能。

二 实战

1 引入依赖包

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
 
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

2 配置application.properties

关闭安全认证校验

management.security.enabled=false

3 启动类

package com.didispace;
 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
@SpringBootApplication
public class DemoApplication {
 
    private Logger logger = LoggerFactory.getLogger(getClass());
 
    @RequestMapping(value = "/test", method = RequestMethod.GET)
    public String testLogLevel() {
        logger.debug("Logger Level ：DEBUG");
        logger.info("Logger Level ：INFO");
        logger.error("Logger Level ：ERROR");
        return "";
    }
 
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

三 测试

1 启动应用程序

2 浏览器输入：http://localhost:8080/test

3 控制台输出——由于默认的日志级别为INFO，所以并没有输出DEBUG级别的内容。

2018-11-03 15:13:50.655  INFO 59148 --- [nio-8080-exec-1] ication$$EnhancerBySpringCGLIB$$302a5f35 : Logger Level ：INFO
2018-11-03 15:13:50.655 ERROR 59148 --- [nio-8080-exec-1] ication$$EnhancerBySpringCGLIB$$302a5f35 : Logger Level ：ERROR

4 postman发送如下消息配置DEBUG

发送POST请求到/loggers/com.didispace端点

{
    "configuredLevel": "DEBUG"
}

5 浏览器输入：http://localhost:8080/test

6 控制台输出——从日志输出，可知动态修改生效了

2018-11-03 15:17:46.718 DEBUG 59148 --- [nio-8080-exec-7] ication$$EnhancerBySpringCGLIB$$302a5f35 : Logger Level ：DEBUG
2018-11-03 15:17:46.718  INFO 59148 --- [nio-8080-exec-7] ication$$EnhancerBySpringCGLIB$$302a5f35 : Logger Level ：INFO
2018-11-03 15:17:46.718 ERROR 59148 --- [nio-8080-exec-7] ication$$EnhancerBySpringCGLIB$$302a5f35 : Logger Level ：ERROR