1.棣栧厛鏄厤緗畝鍗昷ava project
鐜板湪鏉ョ湅log4j.propertise
#綰у埆涓篋EBUG錛屼簩涓緭鍑虹錛屽垎鍒負stdout,R
log4j.logger.helloappLogger=DEBUG, stdout, R
#鎺у埗鍙拌緭鍑?BR>log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p (%F:%L) - %m%n
#淇濆瓨鍒癶elloappLoggerlog.txt鏃ュ織涓紝澶у皬涓?00KB
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=F:/code/eclipse/workspace/TestLo4j/log/helloappLoggerlog.txt
log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d{yyyy MMM dd HH:mm:ss} %-5p %c - %m%n
java鏂囦歡涓敤鍒版棩蹇?BR>package com;
import org.apache.log4j.*;
public class TestLog4j {
static Logger logger = Logger.getLogger("helloappLogger");
public static void main(String[] args) {
// PropertyConfigurator.configure("log4j.properties");
// 濡傛灉.properties鍦ㄥ綋鍓嶇洰褰曚笅鍙互鐪佺暐錛屾垜鏀懼湪欏圭洰鏍圭洰褰曚笅錛屽拰com鍖呭悓鐩綍
logger.debug("Debug ...");
logger.info("Info ...");
logger.warn("Warn ...");
logger.error("Error ...");
}
}
2.web project涓厤緗甽og4j
榪樻槸鍏堟潵鐪媗og4j.perproties
#綰у埆涓篋EBUG錛屼笁涓緭鍑虹錛屽垎鍒負stdout,FILE,R
log4j.logger.hello=DEBUG, stdout, FILE, R
#stdout鏄湪鎺у埗鍙拌緭鍑?BR>log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p (%F:%L) - %m%n
#淇濆瓨鍦╮olling_log_file.log鏃ュ織涓紝appender鏄疪ollingFileAppender
#闇瑕佹敞鎰忕殑鏄疐ile=F:/code/...錛屼笉瑕佸啓鎴怽錛岃繖灝變竴鐐瑰姝繪垜浜?BR>log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=F:/code/eclipse/workspace/TestCvs/WebRoot/WEB-INF/rolling_log_file.log
log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d{yyyy MMM dd HH:mm:ss} %-5p %c - %m%n
#淇濆瓨鍦╨og_file.log鏃ュ織涓紝appender鏄疐ileAppender
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=F:/code/eclipse/workspace/TestCvs/WebRoot/WEB-INF/log_file.log
log4j.appender.FILE.Append=false
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=%d{yyyy MMM dd HH:mm:ss} %-5p %c - %m%n
涔嬪悗瑕佹妸瀹冨姞鍏erlet涓紝鍜屾湇鍔″櫒涓璧峰惎鍔紝鏂逛究鍏朵粬紼嬪簭浣跨敤
public class Log4jServlet extends HttpServlet {
public void init() throws ServletException {
ServletContext sct = getServletContext();
System.out.println("[Log4j]: The Root Path: " + sct.getRealPath("/"));
System.out.println("[Log4j]: InitServlet init start...");
PropertyConfigurator.configure(sct.getRealPath("/")
+getServletConfig().getInitParameter("propfile"));
System.out.println("[Log4j]: InitServlet init over.");
}
}
<servlet>
<description>init log4j of servlet</description>
<display-name>log4j servlet</display-name>
<servlet-name>Log4jServlet</servlet-name>
<servlet-class>com.testCvs.Log4jServlet</servlet-class>
<init-param>
<param-name>propfile</param-name>
<param-value>/WEB-INF/log4j.properties</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
娉細log4j.properties鏀懼湪/WEB-INF涓嬶紝servlet鑷姩鍔犺澆榪欎釜鏂囦歡
鑷蟲鎵鏈夐厤緗簲璇ユ垚鍔熶簡錛屼笉榪囪繕鏄湁浜涢棶棰樻病鏈夎В鍐沖ソ錛岄棶浜嗗嚑涓湅鍙嬩篃娌℃湁寰楀埌濂界殑絳斿錛屼絾鏄幇鍦ㄥ彲浠ュ湪鎺у埗鍙板拰鏂囦歡涓緭鍑烘棩蹇楋紝鍩烘湰鍔熻兘杈懼埌浜嗐傝繕璇峰悇浣嶆湁絀虹粰鎴戠湅鐪嬭繖涓敊璇紝嬈㈣繋鎸囨銆?/P>
閿欒濡備笅錛?BR>log4j:WARN No appenders could be found for logger (org.apache.jasper.compiler.JspRuntimeContext).
log4j:WARN Please initialize the log4j system properly.
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