示例代码：此示例从控制台输入日志，设置了输出等级。
# # Log4J Settings for log4j 1.2.x (via jakarta-commons-logging) # # The five logging levels used by Log are (in order): # # 1. DEBUG (the least serious) # 2. INFO # 3. WARN # 4. ERROR # 5. FATAL (the most serious) # Set root logger level to WARN and append to stdout log4j.rootLogger=INFO, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.Target=System.out log4j.appender.stdout.layout=org.apache.log4j.PatternLayout # Pattern to output the caller's file name and line number. log4j.appender.stdout.layout.ConversionPattern=%d %5p (%c:%L) - %m%n # Print only messages of level ERROR or above in the package noModule. log4j.logger.noModule=FATAL log4j.logger.com.opensymphony.xwork2=INFO log4j.logger.org.apache.springMVC=INFO
示例2
log4j.rootCategory=info, stdout , R log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n log4j.appender.R=org.apache.log4j.DailyRollingFileAppender log4j.appender.R.File=D:/my_log.log log4j.appender.R.layout=org.apache.log4j.PatternLayout log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%n log4j.logger.com.ibatis=debug log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug log4j.logger.java.sql.Connection=debug log4j.logger.java.sql.Statement=debug log4j.logger.java.sql.PreparedStatement=debug,stdout