Eclipse中输出带颜色的log4j日志信息

先上个效果:

0、原理：

核心就是让Eclipse的控制台支持ANSI Escape Color——一种国际标准，使用特定字符表示颜色。即让Eclipse的Console对表示颜色的特定字符进行转义（Escape），而不要直接输出。例如：

[java]  view plain  copy

1. public class HelloColor {  
2.     public static void main(String [] args) {  
3.         System.out.println("Hello \u001b[1;31mred\u001b[0m world!");  
4.     }  
5. }  

1、为Eclipse/MyEclipse安装 ANSI Escape in Console 插件：

可以去eclipse的marketplace搜索下载,如果搜索不到的话,可以用我编译的插件,与eclipse目录下的plugins目录合并即可,下载地址:http://download.youkuaiyun.com/download/leiyong0326/10112547

2、重启IDE，如下所示则表示成功

3、自己编写一个ANSIConsoleAppender ：

import org.apache.log4j.ConsoleAppender;
 import org.apache.log4j.Level;
 import org.apache.log4j.Priority;
 import org.apache.log4j.spi.LoggingEvent;   
 
 /**
  * Colour-coded console appender for Log4J.
  */
 public class ANSIConsoleAppender extends ConsoleAppender
{
    private static final String NORMAL = "0";//无
    private static final String BRIGHT = "1";//高亮
    private static final String UNDER = "4";//下划线,无效
    private static final String BLINK = "5";//闪烁
    private static final String REVERSE = "7";//反显
    private static final String HIDE = "8";//消隐
    private static final String FOREGROUND_BLACK = "30";
    private static final String FOREGROUND_RED = "31";
    private static final String FOREGROUND_GREEN = "32";
    private static final String FOREGROUND_YELLOW = "33";
    private static final String FOREGROUND_BLUE = "34";
    private static final String FOREGROUND_MAGENTA = "35";
    private static final String FOREGROUND_CYAN = "36";
    private static final String FOREGROUND_WHITE = "37";   
 
    private static final String PREFIX = "\u001b[";
    private static final String SUFFIX = "m";
    private static final String SEPARATOR = ";";
    private static final String END_COLOUR = PREFIX + SUFFIX;   
 
    private static final String FATAL_COLOUR = getColor(BRIGHT,FOREGROUND_RED);
    private static final String ERROR_COLOUR = getColor(BRIGHT,FOREGROUND_MAGENTA);
    private static final String WARN_COLOUR = getColor(NORMAL,FOREGROUND_YELLOW);
    private static final String INFO_COLOUR = getColor(NORMAL,FOREGROUND_GREEN);
    private static final String DEBUG_COLOUR = getColor(NORMAL,FOREGROUND_CYAN);
    private static final String TRACE_COLOUR = getColor(BRIGHT,FOREGROUND_BLUE);
 
    private static String getColor(CharSequence... style){
    	String s = PREFIX;
    	s += String.join(SEPARATOR, style);
    	s += SUFFIX;
    	return s;
    }
    /**
     * Wraps the ANSI control characters around the
     * output from the super-class Appender.
     */
    protected void subAppend(LoggingEvent event)
    {
        this.qw.write(getColour(event.getLevel()));
        super.subAppend(event);
        this.qw.write(END_COLOUR);   
 
        if(this.immediateFlush)
        {
            this.qw.flush();
        }
    }   
 
    /**
     * Get the appropriate control characters to change
     * the colour for the specified logging level.
     */
    private String getColour(Level level)
    {
        switch (level.toInt())
        {
            case Priority.FATAL_INT: return FATAL_COLOUR;
            case Priority.ERROR_INT: return ERROR_COLOUR;
            case Priority.WARN_INT: return WARN_COLOUR;
            case Priority.INFO_INT: return INFO_COLOUR;
            case Priority.DEBUG_INT:return DEBUG_COLOUR;
            default: return TRACE_COLOUR;
        }
    }
}

更多方式轻看这个:http://www.javatang.com/archives/2015/03/16/17361179.html

4、修改src下的log4j.properties：

log4j.appender.stdout=com.vst.base.common.log.ANSIConsoleAppender

log4j.appender.stdout.Target=System.info

log4j.appender.stdout.layout=org.apache.log4j.SimpleLayout

参考资料:

http://blog.youkuaiyun.com/javawinner/article/details/41548259  

让Eclipse/MyEclipse的控制台和log4j日志支持多种颜色

http://www.javatang.com/archives/2015/03/16/17361179.html

Eclipse中输出带颜色的log4j日志信息