Under normal circumstances, the info log of log4j will be printed to a unified log file. When you need to view the execution of a specific function, print a specific function to a specific log file as follows

log4j.properties

### set log levels ###
log4j.rootLogger = INFO , C , D , E
 
### console ###
log4j.appender.C = org.apache.log4j.ConsoleAppender
log4j.appender.C.Target = System.out
log4j.appender.C.layout = org.apache.log4j.PatternLayout
log4j.appender.C.layout.ConversionPattern = [%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n
 
### log file ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File =../logs/IvaDubboWeb-info.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = INFO 
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = [%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n
 
### exception ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File = ../logs/IvaDubboWeb-error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR 
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = [%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %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.org.mybatis=DEBUG
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG
log4j.logger.java.sql.ResultSet=DEBUG
 
# Output liveness log
log4j.logger.liveness = INFO, liveness
# Whether to output the log in the parent log
log4j.additivity.liveness = false
# Daily production log file
log4j.appender.liveness = org.apache.log4j.DailyRollingFileAppender
# Generate log to separate file
log4j.appender.liveness.File =../logs/liveness.log
# Supplemental Log 
log4j.appender.liveness.Append = true
# log level
log4j.appender.liveness.Threshold = INFO
log4j.appender.liveness.layout = org.apache.log4j.PatternLayout
# Log format

import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
 
/**
 * Created by Administrator on 2018\1\30 0030.
 */
public class LogTest {
 
    private static final Logger log = LoggerFactory.getLogger(LogTest.class);
    private static final Logger log2 = LoggerFactory.getLogger("liveness");
 
    @Test
    public void testLog() {
   // Test print general log
        log.info("test info");
    }
 
    @Test
    public void testLog2() {
   // Test printing liveness Module log to specified log file
        log2.info("test liveness");
    }
}

 1 log4j.rootLogger=DEBUG,LogFileCometd,Console
 2 
 3 # console output 
 4 log4j.appender.Console=org.apache.log4j.ConsoleAppender
 5 log4j.appender.Console.Target=System.out
 6 log4j.appender.Console.layout=org.apache.log4j.PatternLayout
 7 
 8 # cometd log file output
 9 log4j.appender.LogFileCometd=org.apache.log4j.DailyRollingFileAppender
10 log4j.appender.LogFileCometd.file=./logs/cometdpush.log
11 log4j.appender.LogFileCometd.append=true
12 log4j.appender.LogFileCometd.layout=org.apache.log4j.PatternLayout
13 log4j.appender.LogFileCometd.layout.ConversionPattern=%d{ISO8601} %5p %c{1}:%L - %m%n
14 log4j.appender.LogFileCometd.Threshold=INFO
15 
16 
17 
18 # Output push log
19 log4j.logger.push =DEBUG,LogFile,ErrorFile
20 # Output only the logs specified by yourself
21 log4j.additivity.push=false
22 # Daily production log file
23 log4j.appender.LogFile=org.apache.log4j.DailyRollingFileAppender
24 # Generate log to separate file
25 log4j.appender.LogFile.File=./logs/push.log
26 # Supplemental Log 
27 log4j.appender.LogFile.Append=true
28 # log level
29 log4j.appender.LogFile.Threshold=DEBUG
30 log4j.appender.LogFile.layout =org.apache.log4j.PatternLayout
31 # Log format
32 log4j.appender.LogFile.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%5p] - %c - %F(%L) | %m%n  
33 
34 
35 log4j.appender.ErrorFile=org.apache.log4j.DailyRollingFileAppender
36 log4j.appender.ErrorFile.File=./logs/push_error.log
37 log4j.appender.ErrorFile.Append=true
38 log4j.appender.ErrorFile.Threshold=ERROR
39 log4j.appender.ErrorFile.layout =org.apache.log4j.PatternLayout
40 log4j.appender.ErrorFile.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%5p] - %c - %F(%L) | %m%n

package cn.com.cfets.cfib.tbs.main;
import org.apache.log4j.Logger;public class StartServer {

    private final static Logger logger = Logger.getLogger("push");
public static void main(String[] args) throws Exception {
        org.apache.log4j.PropertyConfigurator.configure("./cfg/log4j.properties");
        logger.info("=================DSP_TBS_PLUGIN version: " + Version.getVersion() + " =================");
        logger.debug("=================DSP_TBS_PLUGIN version: " + Version.getVersion() + " =================");
        logger.info("Start server...");
        StartServer.instance.initAndStartImt();
        StartServer.instance.startServer();  //Start service
    }
}