一 點睛

1 loggers端點

該端點將為我們提供動態修改Spring Boot應用日誌級別的強大功能。該功能的使用非常簡單，它依然延續了Spring Boot自動化配置的實現，所以只需要在引入了spring-boot-starter-actuator依賴的條件下就會自動開啟該端點的功能。

二 實戰

1 引入依賴包

<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

關閉安全認證校驗

management.security.enabled=false

3 啟動類

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 測試

1 啟動應用程式

3 控制檯輸出——由於預設的日誌級別為INFO，所以並沒有輸出DEBUG級別的內容。

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傳送如下訊息配置DEBUG

傳送POST請求到/loggers/com.didispace端點

{
    "configuredLevel": "DEBUG"
}

6 控制檯輸出——從日誌輸出，可知動態修改生效了

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