log4j的使用和log4j過(guò)時(shí)問(wèn)題的解決

1.添加依賴

在pom.xml文件中的<dependencies>下添加log4j依賴:

        
        <!--log4j 依賴-->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.12</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

2.添加log4j.properties

在resources目錄下添加log4j的配置文件, 內(nèi)容如下:

#---- global logging configuration
#---- level: FATAL,ERROR,WARN,INFO,DEBUG
#---- appender: console, file, mail
### set log levels ###
log4j.rootLogger = DEBUG,console

### 輸出到控制臺(tái) ###
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern =  %d{ABSOLUTE} %5p %c{1}:%L - %m%n

### 輸出到日志文件 ###
log4j.appender.file = org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.File = ${uplat.root}/WEB-INF/logs/platform.log
log4j.appender.file.DatePattern=_yyyyMMdd'.log'
#log4j.appender.file.Append = true
#log4j.appender.file.Threshold = INFO
log4j.appender.file.layout = org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern =%-d{yyyy-MM-dd HH\:mm\:ss}  [ %t\:%r ] - [ %p ]  %m%n

### 打印SQL ###
#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
#log4j.logger.java.sql.ResultSet=DEBUG

3.指定log4j配置文件和監(jiān)聽(tīng)器

在web.xml中指定log4j的配置文件,并添加監(jiān)聽(tīng)器

<!-- 指定監(jiān)聽(tīng)器加載的log4j配置文件 -->
  <context-param>
      <param-name>log4j</param-name>
      <param-value>classpath:log4j.properties</param-value>
  </context-param>

  <listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
  </listener>

支持原創(chuàng)-來(lái)自CSDN作者:wei542657623

log4j2的使用

但在我們使用的時(shí)候會(huì)遇到這樣的問(wèn)題:

mark

spring建議使用log4j2來(lái)替換這個(gè)類.

Deprecated. 
as of Spring 4.2.1, in favor of Apache Log4j 2 (following Apache's EOL declaration for log4j 1.x)

@Deprecated
public class Log4jConfigListener
extends java.lang.Object
implements ServletContextListener

1.引入log4j2的依賴jar包

     <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>2.10.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>2.10.0</version>
    </dependency>

    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-web</artifactId>
      <version>2.9.1</version>
    </dependency>

2.web.xml中的配置

     <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>2.10.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>2.10.0</version>
    </dependency>

    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-web</artifactId>
      <version>2.9.1</version>
    </dependency>

3.resources目錄下新增log4j2.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="OFF" monitorInterval="1800">
    <properties>
        <property name="LOG_HOME">/WEB-INF/logs</property>
        <property name="FILE_NAME">finance-pay</property>
    </properties>


    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
        </Console>

        <RollingFile name="running-log" fileName="${LOG_HOME}/${FILE_NAME}.log"
            filePattern="${LOG_HOME}/$${date:yyyy-MM}/${FILE_NAME}-%d{yyyy-MM-dd}-%i.log.gz"
            immediateFlush="true">
            <PatternLayout
                pattern="%date{yyyy-MM-dd HH:mm:ss.SSS} %level [%thread][%file:%line] - %msg%n" />
            <Policies>
                <TimeBasedTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="10 MB" />
            </Policies>
            <DefaultRolloverStrategy max="20" />
        </RollingFile>
    </Appenders>
    <Loggers>

        <Root level="info">
               <!-- 這里是輸入到文件，很重要-->
            <AppenderRef ref="running-log" />
            <!-- 這里是輸入到控制臺(tái)-->
            <AppenderRef ref="Console" />
        </Root>
    </Loggers>
</Configuration>

編寫測(cè)試

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;


public class TestLog4j2 {
     static Logger logger = LogManager.getLogger(LogManager.ROOT_LOGGER_NAME);

 public static void main(String[] args) {
         logger.trace("trace message");
         logger.debug("debug message");
         logger.info("info message");
         logger.warn("warn message");
         logger.error("error message");
         logger.fatal("fatal message");
         System.out.println("Hello World!");
     }

}

支持原創(chuàng)-來(lái)自CSDN作者:HeatDeath