SpringBoot项目配置放项目外部【4】

项目运行日志打印等级实现外部配置

日志等级配置项不能直接通过外部方式注入，由于加载顺序的问题会导致读取不到

• No enum constant org.springframework.boot.logging.LogLevel.${config.out.log-level}

1. 按前面配置外部配置文件的流程，配置日志等级

• 

#SpringBoot项目外部配置过渡文件

#项目Main方法运行端口
server.port=${config.out.server-port:8002}
#运行日志打印级别
logging.level.com.skxe=${config.out.log-level}

• 

#springboot-configout项目外部配置文件

#项目Main方法运行端口
config.out.server-port=8003
#项目名称
config.out.server-name=项目外部文件测试
#运行日志打印级别
config.out.log-level=debug

2. 通过Java代码，在读取配置文件属性的同时，实现日志级别的切换

取消上面中的logging.level配置项

package com.skxe.demo.config;


import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.logging.LogLevel;
import org.springframework.boot.logging.LoggingSystem;

@ConfigurationProperties("config.out")
public class ApplicationOutConfig {

    private LoggingSystem loggingSystem;

    public ApplicationOutConfig(LoggingSystem loggingSystem) {
        this.loggingSystem = loggingSystem;
    }

    private Integer serverPort;
    private String serverName;
    private String[] logLevels;                         //项目运行日志打印级别

    public Integer getServerPort() {
        return serverPort;
    }

    public void setServerPort(Integer serverPort) {
        this.serverPort = serverPort;
        System.out.println("-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
        System.out.println("                           ------->>> 项目Main方法运行端口: " + serverPort +" <<<-------");
        System.out.println("-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");

    }

    public String getServerName() {
        return serverName;
    }

    public void setServerName(String serverName) {
        this.serverName = serverName;
        System.out.println("-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
        System.out.println("                           ------->>> 项目名称: "+ serverName +" <<<-------");
        System.out.println("-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");

    }

    public String[] getLogLevels() {
        return logLevels;
    }

    public void setLogLevels(String[] logLevels) {
        this.logLevels = logLevels;
        if (null != logLevels){
            for (String logLevel : logLevels) {
                String[] ll = logLevel.split("=");
                System.out.println("--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                System.out.println("       ------->>>项目日志记录级别 | "+ ll[0] + " | " + ll[1] + "            ");
                System.out.println("--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                LogLevel level = LogLevel.valueOf(ll[1].trim().toUpperCase());
                loggingSystem.setLogLevel(ll[0], level);
            }
        }
    }
}

org.springframework.boot.logging.LoggingSystem支持的日志类型：

• org.springframework.boot.logging.logback.LogbackLoggingSystem
• org.springframework.boot.logging.log4j2.Log4J2LoggingSystem
• org.springframework.boot.logging.java.JavaLoggingSystem

日志的设置这里使用了字符串数组，是为了更好的自定义自己的不同包/类的日志级别

• 

#springboot-configout项目外部配置文件

#项目Main方法运行端口
config.out.server-port=8003
#项目名称
config.out.server-name=项目外部文件测试
#运行日志打印级别
config.out.log-levels=com.skxe=debug

3. 通过接口测试日志等级的设置是否生效

通过加载顺序可以知道，我们的设置只是在对应的配置生效以后，之前的不会生效，
项目可以在 中先配置默认值，这里的配置主要是应对生产运行日志

package com.skxe.demo.api;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RequestMapping("/log")
@RestController
public class LogTest {

    private Logger log = LoggerFactory.getLogger(this.getClass());

    @RequestMapping("/test/level")
    public String testConfig(){
        log.debug("当前运行日志级别 | debug");
        log.info("当前运行日志级别 | info");
        log.warn("当前运行日志级别 | warn");
        log.error("当前运行日志级别 | error");
        String logLevel = null;
        if (log.isDebugEnabled()) {
            logLevel = "debug";
        }
        else if (log.isInfoEnabled()) {
            logLevel = "info";
        }
        else if (log.isWarnEnabled()) {
            logLevel = "warn";
        }
        else if (log.isErrorEnabled()) {
            logLevel = "error";
        }

        return "log-level  | " + logLevel;
    }

}

• 项目打印日志：

2020-03-07 19:10:34.678 DEBUG 5224 --- [nio-8003-exec-1] com.skxe.demo.api.LogTest                : 当前运行日志级别 | debug
2020-03-07 19:10:34.679  INFO 5224 --- [nio-8003-exec-1] com.skxe.demo.api.LogTest                : 当前运行日志级别 | info
2020-03-07 19:10:34.679  WARN 5224 --- [nio-8003-exec-1] com.skxe.demo.api.LogTest                : 当前运行日志级别 | warn
2020-03-07 19:10:34.679 ERROR 5224 --- [nio-8003-exec-1] com.skxe.demo.api.LogTest                : 当前运行日志级别 | error

接口返回参数：

GET http://localhost:8003/log/test/level

HTTP/1.1 200 
Content-Type: application/json
Content-Length: 18
Date: Sat, 07 Mar 2020 11:10:34 GMT
Keep-Alive: timeout=60
Connection: keep-alive

log-level  | debug

打完收工！！！