Springboot2整合logback.xml动态修改日志打印级别-蒲公英云

今天找bug烦到了，生产上的日志级别不能修改，非常不利于排查问题，于是想到了动态修改日志打印级别，因为上一周把项目升级成springboot2，并且使用logback.xml管理日志打印，所以修改也很方便。

在pom.xml引入日志依赖

org.springframework.boot
spring-boot-starter-logging

注意：如果引入了starter依赖，则不用再引入以上依赖，因为starter模块中已经集成日志模块

logback.xml文件配置如下

<?xml version=”1.0” encoding=”UTF-8”?>

logback

ss.SSS}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>

debug

${CONSOLE_LOG_PATTERN}

UTF-8

${log.path}/debug.log

%d{yyyy-MM-dd HHss.SSS} [%thread] %-5level %logger{50} - %msg%n
UTF-8

${log.path}/debug-%d{yyyy-MM-dd}.%i.log

100MB

15

debug

${log.path}/info.log

%d{yyyy-MM-dd HHss.SSS} [%thread] %-5level %logger{50} - %msg%n
UTF-8

${log.path}/info-%d{yyyy-MM-dd}.%i.log

100MB

15

info
ACCEPT
DENY

${log.path}/warn.log

%d{yyyy-MM-dd HHss.SSS} [%thread] %-5level %logger{50} - %msg%n
UTF-8

${log.path}/warn-%d{yyyy-MM-dd}.%i.log

100MB

15

warn
ACCEPT
DENY

${log.path}/error.log

%d{yyyy-MM-dd HHss.SSS} [%thread] %-5level %logger{50} - %msg%n
UTF-8

${log.path}/error-%d{yyyy-MM-dd}.%i.log

100MB

15

ERROR
ACCEPT
DENY

接口

import ch.qos.logback.classic.LoggerContext;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * 使用lombok日志管理框架
 */
@Slf4j
@RestController
public class LogController {
    @GetMapping("update/logLevel")
    public String updateLogLevel() {
        LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
        // 将项目日志打印级别设置成debug级别，还可以根据包路径进行日志级别设置
        loggerContext.getLogger("root").setLevel(ch.qos.logback.classic.Level.toLevel("debug"));
        return "success";
    }
    /**
     * 测试代码
     */
    @GetMapping("/printLog")
    public void testLogPrint() {
        log.debug("debug");
        log.info("info");
        log.warn("warn");
        log.error("error");
    }
}

启动springboot项目

springboot默认的日志级别是INFO

测试

调用接口，将项目日志级别改成debug

然后再调用测试接口

再看一下debug日志文件

-———————————————————————————————————————————————————————————————————————————————————————————————————————————————

example2：

package com.chinasofti.cloudeasy.api.web;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.LoggerContext;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
@Api(tags = "动态修改日志级别")
@RequestMapping("api/v1/monitor")
@RestController
@Slf4j
public class LogController {
    /**
     * 修改项目日志输出级别
     *
     * @param allLevel 全局日志级别
     * @param singleLevel 某个类日志级别
     * @param singlePath 需要单独设置日志输出级别的类的全限定名（例:com.chinasofti.cloudeasy.api.web.LogController）
     * @return
     */
    @ApiOperation(value = "changeLogLevel")
    @GetMapping("changeLevel")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "rootLevel",
                    value = "root,全局级别:ALL,TRACE,DEBUG,INFO,WARN,ERROR,OFF", required = false),
            @ApiImplicitParam(name = "singleLevel",
                    value = "单独设置类日志级别:ALL,TRACE,DEBUG,INFO,WARN,ERROR,OFF", required = false),
            @ApiImplicitParam(name = "singlePath",
                    value = "单独类路径:com.chinasofti.cloudeasy.api.web.LogController",
                    required = false)})
    public String changeLevel(String rootLevel, String singleLevel, String singlePath) {
        LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
        log.warn("set log rootLevel:{},singleLevel:{},singlePath:{}", rootLevel, singleLevel,
                singlePath);
        if (!StringUtils.isEmpty(rootLevel)) {
            // 设置全局日志级别
            ch.qos.logback.classic.Logger logger = loggerContext.getLogger("root");
            logger.setLevel(Level.toLevel(rootLevel));
        }
        if (!StringUtils.isEmpty(singleLevel)) {
            // 设置某个类日志级别-可以实现定向日志级别调整
            ch.qos.logback.classic.Logger vLogger = loggerContext.getLogger(singlePath);
            if (vLogger != null) {
                vLogger.setLevel(Level.toLevel(singleLevel));
            }
        }
        return "success";
    }
}