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Log4j日志文件輸出為相對路徑的解決方法

方法一：將日志文件輸出到tomcat自身的日志文件夾logs中

# console is set to be a ConsoleAppender using a PatternLayout.

log4j.appender.console=org.apache.log4j.ConsoleAppender

log4j.appender.console.Threshold=info

log4j.appender.console.layout=org.apache.log4j.PatternLayout

log4j.appender.console.layout.ConversionPattern=- %m%n

# R is set to be a File appender using a PatternLayout.

log4j.appender.R=org.apache.log4j.RollingFileAppender

log4j.appender.R.Append=true

log4j.appender.R.Threshold=info

log4j.appender.R.MaxFileSize=1024KB

log4j.appender.R.MaxBackupIndex=10

log4j.appender.R.File=../logs/abc.log

log4j.appender.R.layout=org.apache.log4j.PatternLayout

log4j.appender.R.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} [%c]-[%p] %m%n

方法二：將日志文件輸出到自己程序WEB-INF\logs目錄中

1.<servlet>
2

2. <servlet-name>lo4jInit</servlet-name>
3

3. <servlet-class>com.linder.util.log4j.init.Lo4jInit</servlet-class>
4

4. <init-param>
5

5. <param-name>log4j_init_path</param-name>
6

6. <param-value>WEB-INF\classes\log4j.properties</param-value>
7

7. </init-param>
8

8. <init-param>
9

9. <param-name>log4j_file_path</param-name>
10

10. <param-value>WEB-INF\logs\</param-value>
11

11. </init-param>
12

12. <load-on-startup>0</load-on-startup>
13

13. </servlet>
14

2、編寫一個初始化log4j的Servlet

1.package com.linder.util.log4j.init;

3.import java.io.FileInputStream;

4.import java.io.IOException;

5.import java.util.Properties;

7.import javax.servlet.ServletException;

8.import javax.servlet.http.HttpServlet;

9.import javax.servlet.http.HttpServletRequest;

10.import javax.servlet.http.HttpServletResponse;

11.

12.import org.apache.log4j.Logger;

13.import org.apache.log4j.PropertyConfigurator;

14.

15.

16.public class Lo4jInit extends HttpServlet {

17.

18. /**

19. *

20. */

21. private static final long serialVersionUID = 1L;

22. private static Logger logger=Logger.getLogger(Lo4jInit.class);

23.

24. public void init(){

25. String path=this.getServletContext().getRealPath("/");

26. String file=this.getInitParameter("log4j_init_path");

27. String logFile=this.getInitParameter("log4j_file_path");

28. if(file!=null)

29. {

30. Properties prop = new Properties();

31. try{

32. prop.load(new FileInputStream(path+file)); //加載log4j.properties

33. prop.setProperty("log4j.appender.R.File", path+logFile+ prop.getProperty("log4j.appender.R.File")); //設(shè)置日志文件的輸出路徑

34. PropertyConfigurator.configure(prop); //加載配置項

35. }catch(Exception e)

36. {

37. logger.info("初始化log4j日志輸入路徑異常，請檢查web.xml參數(shù)配置是否正常，異常發(fā)生在"+this.getClass().getName()+"類的public void init()方法，異常的愿意是："+e.getMessage(), e.fillInStackTrace());

38. }

39. }

40.

41.

42. }

43. protected void service(HttpServletRequest request, HttpServletResponse response)

44. throws ServletException, IOException {

45.

46. }

47.

48.}

3、log4j.properties的配置信息

1.# Set root category priority to info and its only appender to console.

2.log4j.rootCategory=info,console,R

3.#log4j.debug=true

5.# console is set to be a ConsoleAppender using a PatternLayout.

6.log4j.appender.console=org.apache.log4j.ConsoleAppender

7.log4j.appender.console.Threshold=info

8.log4j.appender.console.layout=org.apache.log4j.PatternLayout

9.log4j.appender.console.layout.ConversionPattern=- %m%n

10.

11.# R is set to be a File appender using a PatternLayout.

12.log4j.appender.R=org.apache.log4j.RollingFileAppender

13.log4j.appender.R.Append=true

14.log4j.appender.R.Threshold=info

15.log4j.appender.R.MaxFileSize=1024KB

16.log4j.appender.R.MaxBackupIndex=10

17.log4j.appender.R.File=abc.log

18.log4j.appender.R.layout=org.apache.log4j.PatternLayout

19.log4j.appender.R.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} [%c]-[%p] %m%n

posted on 2010-11-02 22:05 麟德閱讀(9583) 評論(1) 編輯收藏所屬分類: java

# re: Log4j日志文件輸出為相對路徑的解決方法[未登錄] 2014-04-28 16:47 ds

Log4j日志文件輸出為相對路徑的解決方法

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