教育项目--统一日志处理【7】

╰半夏微凉° 2023-10-05 17:55 47阅读 0赞

#### 日志处理 ####

*   *  一、日志
     *   *  配置日志级别
         *  设置日志级别
     *  二、Logback日志
     *   *  1、配置logback日志
         *  2、将错误日志输出到文件
         *  3、将日志堆栈信息输出到文件

### 一、日志 ###

#### 配置日志级别 ####

日志记录器（Logger）的行为是分等级的。  
如下表所示：

> 分为：OFF、FATAL、ERROR、WARN、INFO、DEBUG、ALL  
> 默认情况下，spring boot从控制台打印出来的日志级别只有INFO及以上级别，可以配置日志级别

#### 设置日志级别 ####

> logging.level.root=WARN  
> 这种方式只能将日志打印在控制台上

### 二、Logback日志 ###

spring boot内部使用Logback作为日志实现的框架。

> Logback和log4j非常相似，如果你对log4j很熟悉，那对logback很快就会得心应手。  
> logback相对于log4j的一些优点：https://blog.csdn.net/caisini\_vc/article/details/48551287

#### 1、配置logback日志 ####

删除application.properties中的日志配置  
resources 中创建 logback-spring.xml 【这个名字在SpringBoot中可以优先加载】

<?xml version="1.0" encoding="UTF-8"?>
    <configuration  scan="true" scanPeriod="10 seconds">
        
        
        
        
    
        <contextName>logback</contextName>
        
        <property name="log.path" value="C:/Users/lenovo/Desktop/science_source_education_log/edu" />
        
        
        
        
        
        
        
        <property name="CONSOLE_LOG_PATTERN"
                  value="%boldMagenta(%date{yyyy-MM-dd HH:mm:ss})|%cyan(%-5level)|%blue(%thread)|%blue(%file:%line)|%green(%logger) |%cyan(%msg%n)"/>
    
    
        
        <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
            
            
            <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
                <level>INFO</level>
            </filter>
            <encoder>
                <Pattern>${CONSOLE_LOG_PATTERN}</Pattern>
                
                <charset>UTF-8</charset>
            </encoder>
        </appender>
    
    
        
    
        
        <appender name="INFO_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
            
            <file>${log.path}/log_info.log</file>
            
            <encoder>
                <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
                <charset>UTF-8</charset>
            </encoder>
            
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <fileNamePattern>${log.path}/info/log-info-%d{yyyy-MM-dd}.%i.log</fileNamePattern>
                <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                    <maxFileSize>100MB</maxFileSize>
                </timeBasedFileNamingAndTriggeringPolicy>
                
                <maxHistory>15</maxHistory>
            </rollingPolicy>
            
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                <level>INFO</level>
                <onMatch>ACCEPT</onMatch>
                <onMismatch>DENY</onMismatch>
            </filter>
        </appender>
    
        
        <appender name="WARN_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
            
            <file>${log.path}/log_warn.log</file>
            
            <encoder>
                <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
                <charset>UTF-8</charset> 
            </encoder>
            
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                <fileNamePattern>${log.path}/warn/log-warn-%d{yyyy-MM-dd}.%i.log</fileNamePattern>
                <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                    <maxFileSize>100MB</maxFileSize>
                </timeBasedFileNamingAndTriggeringPolicy>
                
                <maxHistory>15</maxHistory>
            </rollingPolicy>
            
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                <level>warn</level>
                <onMatch>ACCEPT</onMatch>
                <onMismatch>DENY</onMismatch>
            </filter>
        </appender>
    
    
        
        <appender name="ERROR_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
            
            <file>${log.path}/log_error.log</file>
            
            <encoder>
                <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
                <charset>UTF-8</charset> 
            </encoder>
            
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                <fileNamePattern>${log.path}/error/log-error-%d{yyyy-MM-dd}.%i.log</fileNamePattern>
                <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                    <maxFileSize>100MB</maxFileSize>
                </timeBasedFileNamingAndTriggeringPolicy>
                
                <maxHistory>15</maxHistory>
            </rollingPolicy>
            
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                <level>ERROR</level>
                <onMatch>ACCEPT</onMatch>
                <onMismatch>DENY</onMismatch>
            </filter>
        </appender>
    
        
        
        
        <springProfile name="dev">
            
            <logger name="com.guli" level="INFO" />
    
            
            <root level="INFO">
                <appender-ref ref="CONSOLE" />
                <appender-ref ref="INFO_FILE" />
                <appender-ref ref="WARN_FILE" />
                <appender-ref ref="ERROR_FILE" />
            </root>
        </springProfile>
    
    
        
        <springProfile name="pro">
    
            <root level="INFO">
                <appender-ref ref="CONSOLE" />
                <appender-ref ref="DEBUG_FILE" />
                <appender-ref ref="INFO_FILE" />
                <appender-ref ref="ERROR_FILE" />
                <appender-ref ref="WARN_FILE" />
            </root>
        </springProfile>
    
    </configuration>

#### 2、将错误日志输出到文件 ####

GlobalExceptionHandler.java 中  
类上添加注解

@Slf4j

异常输出语句

log.error(e.getMessage());

#### 3、将日志堆栈信息输出到文件 ####

定义工具类  
**guli-framework-common下创建util包，创建ExceptionUtil.java工具类**

package com.guli.common.util;
    
    public class ExceptionUtil {
        
    
        public static String getMessage(Exception e) {
        
            StringWriter sw = null;
            PrintWriter pw = null;
            try {
        
                sw = new StringWriter();
                pw = new PrintWriter(sw);
                // 将出错的栈信息输出到printWriter中
                e.printStackTrace(pw);
                pw.flush();
                sw.flush();
            } finally {
        
                if (sw != null) {
        
                    try {
        
                        sw.close();
                    } catch (IOException e1) {
        
                        e1.printStackTrace();
                    }
                }
                if (pw != null) {
        
                    pw.close();
                }
            }
            return sw.toString();
        }
    }

调用

log.error(ExceptionUtil.getMessage(e));

MyselfException中创建toString方法

@Override
    public String toString() {
        
        return "MyselfException{" +
            "message=" + this.getMessage() +
            ", code=" + code +
            '}';
    }