log4j:WARN No appenders could be found for logger 解决方案

逃离我推掉我的手 2022-05-26 11:42 112阅读 0赞

### [log4j:WARN No appenders could be found for logger 解决方案][log4j_WARN No appenders could be found for logger]*（[转载地址][Link 1]）* ###

我们在使用Log4j的时候，总是出现：

Java代码 ![收藏代码][icon_star.png]

1.  log4j:WARN No appenders could be found **for** logger (org.apache.ibatis.logging.LogFactory). 
2.  log4j:WARN Please initialize the log4j system properly.

这个问题是因为我们的log4j.properties文件配置不够完整，所以我们给它配置齐了就不会再出现这个问题。  
log4j.properties不完整配置如下：

Java代码 ![收藏代码][icon_star.png]

1.  log4j.rootLogger=DEBUG, stdout 
2.  
3.  log4j.appender.stdout=org.apache.log4j.ConsoleAppender 
4.  log4j.appender.stdout.layout=org.apache.log4j.PatternLayout 
5.  log4j.appender.stdout.layout.ConversionPattern=%c\{ 1\} - %m%n 
6.  
7.  log4j.logger.java.sql.PreparedStatement=DEBUG

完整配置如下：

Java代码 ![收藏代码][icon_star.png]

1.  log4j.rootLogger=CONSOLE,FILE 
2.  log4j.addivity.org.apache=**true**
3.  
4.  \# 应用于控制台 
5.  log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender 
6.  log4j.appender.CONSOLE.Threshold=INFO 
7.  log4j.appender.CONSOLE.Target=System.out 
8.  log4j.appender.CONSOLE.Encoding=GBK 
9.  log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout 
10. log4j.appender.CONSOLE.layout.ConversionPattern=\[framework\] %d - %c -%-4r \[%t\] %-5p %c %x - %m%n 
11. 
12. \# 每天新建日志 
13. log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender 
14. log4j.appender.A1.File=C:/log4j/log 
15. log4j.appender.A1.Encoding=GBK 
16. log4j.appender.A1.Threshold=DEBUG 
17. log4j.appender.A1.DatePattern='.'yyyy-MM-dd 
18. log4j.appender.A1.layout=org.apache.log4j.PatternLayout 
19. log4j.appender.A1.layout.ConversionPattern=%d\{ABSOLUTE\} %5p %c\{ 1\}:%L : %m%n 
20. 
21. \#应用于文件 
22. log4j.appender.FILE=org.apache.log4j.FileAppender 
23. log4j.appender.FILE.File=C:/log4j/file.log 
24. log4j.appender.FILE.Append=**false**
25. log4j.appender.FILE.Encoding=GBK 
26. log4j.appender.FILE.layout=org.apache.log4j.PatternLayout 
27. log4j.appender.FILE.layout.ConversionPattern=\[framework\] %d - %c -%-4r \[%t\] %-5p %c %x - %m%n 
28. 
29. \# 应用于文件回滚 
30. log4j.appender.ROLLING\_FILE=org.apache.log4j.RollingFileAppender 
31. log4j.appender.ROLLING\_FILE.Threshold=ERROR 
32. log4j.appender.ROLLING\_FILE.File=rolling.log 
33. log4j.appender.ROLLING\_FILE.Append=**true**
34. log4j.appender.CONSOLE\_FILE.Encoding=GBK 
35. log4j.appender.ROLLING\_FILE.MaxFileSize=10KB 
36. log4j.appender.ROLLING\_FILE.MaxBackupIndex=1
37. log4j.appender.ROLLING\_FILE.layout=org.apache.log4j.PatternLayout 
38. log4j.appender.ROLLING\_FILE.layout.ConversionPattern=\[framework\] %d - %c -%-4r \[%t\] %-5p %c %x - %m%n 
39. 
40. \#自定义Appender 
41. log4j.appender.im = net.cybercorlin.util.logger.appender.IMAppender 
42. log4j.appender.im.host = mail.cybercorlin.net 
43. log4j.appender.im.username = username 
44. log4j.appender.im.password = password 
45. log4j.appender.im.recipient = yyflyons@163.com 
46. log4j.appender.im.layout=org.apache.log4j.PatternLayout 
47. log4j.appender.im.layout.ConversionPattern =\[framework\] %d - %c -%-4r \[%t\] %-5p %c %x - %m%n 
48. 
49. \#应用于socket 
50. log4j.appender.SOCKET=org.apache.log4j.RollingFileAppender 
51. log4j.appender.SOCKET.RemoteHost=localhost 
52. log4j.appender.SOCKET.Port=5001
53. log4j.appender.SOCKET.LocationInfo=**true**
54. \# Set up **for** Log Facter 5
55. log4j.appender.SOCKET.layout=org.apache.log4j.PatternLayout 
56. log4j.appender.SOCET.layout.ConversionPattern=\[start\]%d\{DATE\}\[DATE\]%n%p\[PRIORITY\]%n%x\[NDC\]%n%t\[THREAD\]%n%c\[CATEGORY\]%n%m\[MESSAGE\]%n%n 
57. \# Log Factor 5 Appender 
58. log4j.appender.LF5\_APPENDER=org.apache.log4j.lf5.LF5Appender 
59. log4j.appender.LF5\_APPENDER.MaxNumberOfRecords=2000
60. 
61. \# 发送日志给邮件 
62. log4j.appender.MAIL=org.apache.log4j.net.SMTPAppender 
63. log4j.appender.MAIL.Threshold=FATAL 
64. log4j.appender.MAIL.BufferSize=10
65. log4j.appender.MAIL.From=yyflyons@163.com 
66. log4j.appender.MAIL.SMTPHost=www.wusetu.com 
67. log4j.appender.MAIL.Subject=Log4J Message 
68. log4j.appender.MAIL.To=yyflyons@126.com 
69. log4j.appender.MAIL.layout=org.apache.log4j.PatternLayout 
70. log4j.appender.MAIL.layout.ConversionPattern=\[framework\] %d - %c -%-4r \[%t\] %-5p %c %x - %m%n

再次运行你的程序，你会发现Log4j的警告消失了。不过发现以前的Log4j控制台信息也没有了，其实只要把上面详细配置的log4j.rootLogger=CONSOLE,FILE改为log4j.rootLogger=DEBUG,CONSOLE,FILE，你就发现，控制台信息又回来了。

Java代码 ![收藏代码][icon_star.png]

1.  log4j.rootLogger=CONSOLE,FILE 
2.  \#log4j.rootLogger=DEBUG,CONSOLE,FILE 
3.  log4j.addivity.org.apache=**true**

[log4j_WARN No appenders could be found for logger]: http://javapub.iteye.com/blog/866664
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