spring boot 让日志带上颜色

Posted 福州-司马懿

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代码

SLF4J——Simple Logging Facade For Java,它是一个针对于各类Java日志框架的统一Facade抽象。Java日志框架众多——常用的有java.util.logging, log4j, logback,commons-logging, Spring框架使用的是Jakarta Commons Logging API (JCL)。而SLF4J定义了统一的日志抽象接口,而真正的日志实现则是在运行时决定的——它提供了各类日志框架的binding。

Logback是log4j框架的作者开发的新一代日志框架,它效率更高、能够适应诸多的运行环境,同时天然支持SLF4J。

默认情况下,Spring Boot会用Logback来记录日志

private static final String TAG = "test";
private Logger log = LoggerFactory.getLogger(TAG);
public void test(String str) {
	log.debug(str);
	log.info(str);
	log.warn(str);
	log.error(str);
}

无效的方法

IntelliJ IDEA 的版本是当前最新版

网上最容易搜到的方法,就是点击 “Edit Configurations…”,在确保运行模式为 “Spring Boot” 的情况下,将 “Environment” 的 “VM options” 设置为 -Dspring.output.ansi.enabled=ALWAYS


上面的这个方法,等价于在 application.properties
中配置

spring.output.ansi.enabled

  • always
  • never
  • detect

或者在 application.yml 中配置

spring:
  output:
    ansi:
      enabled: always


但是,上面的方法输出的结果还是一样灰蒙蒙的。根本无效。

使用ansi颜色控制代码

下面是控制颜色的代码

    // Reset
    public static final String RESET = "\\033[0m";  // Text Reset

    // Regular Colors
    public static final String WHITE = "\\033[0;30m";   // WHITE
    public static final String RED = "\\033[0;31m";     // RED
    public static final String GREEN = "\\033[0;32m";   // GREEN
    public static final String YELLOW = "\\033[0;33m";  // YELLOW
    public static final String BLUE = "\\033[0;34m";    // BLUE
    public static final String PURPLE = "\\033[0;35m";  // PURPLE
    public static final String CYAN = "\\033[0;36m";    // CYAN
    public static final String GREY = "\\033[0;37m";   // GREY

    // Bold
    public static final String WHITE_BOLD = "\\033[1;30m";  // WHITE
    public static final String RED_BOLD = "\\033[1;31m";    // RED
    public static final String GREEN_BOLD = "\\033[1;32m";  // GREEN
    public static final String YELLOW_BOLD = "\\033[1;33m"; // YELLOW
    public static final String BLUE_BOLD = "\\033[1;34m";   // BLUE
    public static final String PURPLE_BOLD = "\\033[1;35m"; // PURPLE
    public static final String CYAN_BOLD = "\\033[1;36m";   // CYAN
    public static final String GREY_BOLD = "\\033[1;37m";  // GREY

    // Underline
    public static final String WHITE_UNDERLINED = "\\033[4;30m";  // WHITE
    public static final String RED_UNDERLINED = "\\033[4;31m";    // RED
    public static final String GREEN_UNDERLINED = "\\033[4;32m";  // GREEN
    public static final String YELLOW_UNDERLINED = "\\033[4;33m"; // YELLOW
    public static final String BLUE_UNDERLINED = "\\033[4;34m";   // BLUE
    public static final String PURPLE_UNDERLINED = "\\033[4;35m"; // PURPLE
    public static final String CYAN_UNDERLINED = "\\033[4;36m";   // CYAN
    public static final String GREY_UNDERLINED = "\\033[4;37m";  // GREY

    // Background
    public static final String WHITE_BACKGROUND = "\\033[40m";  // WHITE
    public static final String RED_BACKGROUND = "\\033[41m";    // RED
    public static final String GREEN_BACKGROUND = "\\033[42m";  // GREEN
    public static final String YELLOW_BACKGROUND = "\\033[43m"; // YELLOW
    public static final String BLUE_BACKGROUND = "\\033[44m";   // BLUE
    public static final String PURPLE_BACKGROUND = "\\033[45m"; // PURPLE
    public static final String CYAN_BACKGROUND = "\\033[46m";   // CYAN
    public static final String GREY_BACKGROUND = "\\033[47m";  // GREY

    // High Intensity
    public static final String WHITE_BRIGHT = "\\033[0;90m";  // WHITE
    public static final String RED_BRIGHT = "\\033[0;91m";    // RED
    public static final String GREEN_BRIGHT = "\\033[0;92m";  // GREEN
    public static final String YELLOW_BRIGHT = "\\033[0;93m"; // YELLOW
    public static final String BLUE_BRIGHT = "\\033[0;94m";   // BLUE
    public static final String PURPLE_BRIGHT = "\\033[0;95m"; // PURPLE
    public static final String CYAN_BRIGHT = "\\033[0;96m";   // CYAN
    public static final String GREY_BRIGHT = "\\033[0;97m";  // GREY

    // Bold High Intensity
    public static final String WHITE_BOLD_BRIGHT = "\\033[1;90m"; // WHITE
    public static final String RED_BOLD_BRIGHT = "\\033[1;91m";   // RED
    public static final String GREEN_BOLD_BRIGHT = "\\033[1;92m"; // GREEN
    public static final String YELLOW_BOLD_BRIGHT = "\\033[1;93m";// YELLOW
    public static final String BLUE_BOLD_BRIGHT = "\\033[1;94m";  // BLUE
    public static final String PURPLE_BOLD_BRIGHT = "\\033[1;95m";// PURPLE
    public static final String CYAN_BOLD_BRIGHT = "\\033[1;96m";  // CYAN
    public static final String GREY_BOLD_BRIGHT = "\\033[1;97m"; // GREY

    // High Intensity backgrounds
    public static final String WHITE_BACKGROUND_BRIGHT = "\\033[0;100m";// WHITE
    public static final String RED_BACKGROUND_BRIGHT = "\\033[0;101m";// RED
    public static final String GREEN_BACKGROUND_BRIGHT = "\\033[0;102m";// GREEN
    public static final String YELLOW_BACKGROUND_BRIGHT = "\\033[0;103m";// YELLOW
    public static final String BLUE_BACKGROUND_BRIGHT = "\\033[0;104m";// BLUE
    public static final String PURPLE_BACKGROUND_BRIGHT = "\\033[0;105m"; // PURPLE
    public static final String CYAN_BACKGROUND_BRIGHT = "\\033[0;106m";  // CYAN
    public static final String GREY_BACKGROUND_BRIGHT = "\\033[0;107m";   // GREY

在打印日志函数的 message 前面加上颜色定义字符串,在 message 后面加上重置颜色的字符串。为了方便观察,日志改色的效果,这里进行了两次打印来作对比。

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Console {
    public static Log getInstance(String name) {
        return new Log(name);
    }

    public static class Log {
//        private org.apache.commons.logging.Log log;
        private Logger log;

        public Log(String name) {
//            log = LogFactory.getLog(name);
            log = LoggerFactory.getLogger(name);
        }
        public void debug(String str) {
            log.debug(BLUE + str + RESET);
            log.debug(str);
        }
        public void info(String str) {
            log.info(GREEN + str + RESET);
            log.info(str);
        }
        public void warn(String str) {
            log.warn(YELLOW + str + RESET);
            log.warn(str);
        }
        public void error(String str) {
            log.error(RED + str + RESET);
            log.error(str);
        }
    }
    //此处省略颜色代码的定义
}

通过打印可以看到,并不是整行日志的颜色都会改变。仅有message部分的颜色变了

使用插件

Settings ——> Plugins 中下载 “Grep Console” 插件

下载完后,会提示 “重启” ,重启之后,需要在设置中配置字体颜色。
这里可以根据 “亮色” 和 “暗色” 的主题进行分别配色

配置后重新运行程序,可以看到输出的日志已经全部变色了

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