Java项目中使用日志

ゞ浴缸里的玫瑰 2022-02-16 13:53 191阅读 0赞

本文介绍两种方式：logback和log4j，注意它们都要完整实现slf4j API。

1.logback

依赖：

<dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-core</artifactId>
                <version>1.2.3</version>
            </dependency>
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-classic</artifactId>
                <version>1.2.3</version>
            </dependency>
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>1.7.30</version>
            </dependency>

Java代码调用：

import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    public class Test {
        private static final Logger log= LoggerFactory.getLogger(Test.class.getName());
        public void method(){
            log.info("打印日志");
        }
    }

2.log4j

依赖如下：

<properties>
            <log4jVersion>1.2.17</log4jVersion>
            <loggingVersion>1.2</loggingVersion>
        </properties>
        <dependencies>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4jVersion}</version>
            </dependency>
            
            <dependency>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
                <version>${loggingVersion}</version>
            </dependency>
        </dependencies>

properties文件：

log4j.rootLogger=info,console,dailyFile
    log4j.additivity.org.apache=true
    log4j.appender.A1.Encoding=UTF-8
    
    log4j.appender.console=org.apache.log4j.ConsoleAppender
    log4j.appender.console.Threshold=DEBUG
    log4j.appender.console.ImmediateFlush=true
    log4j.appender.console.Target=System.out
    log4j.appender.console.layout=org.apache.log4j.PatternLayout
    log4j.appender.console.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n
    
    
    log4j.appender.logFile=org.apache.log4j.FileAppender
    log4j.appender.logFile.Threshold=DEBUG
    log4j.appender.logFile.ImmediateFlush=true
    log4j.appender.logFile.Append=true
    log4j.appender.logFile.File=/top/yunduo2018/raft/raft.log4j
    log4j.appender.logFile.layout=org.apache.log4j.PatternLayout
    log4j.appender.logFile.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n
    
    log4j.appender.rollingFile=org.apache.log4j.RollingFileAppender
    log4j.appender.rollingFile.Threshold=DEBUG
    log4j.appender.rollingFile.ImmediateFlush=true
    log4j.appender.rollingFile.Append=true
    log4j.appender.rollingFile.File=/top/yunduo2018/raft/raft.log4j
    log4j.appender.rollingFile.MaxFileSize=200KB
    log4j.appender.rollingFile.MaxBackupIndex=50
    log4j.appender.rollingFile.layout=org.apache.log4j.PatternLayout
    log4j.appender.rollingFile.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n
    
    log4j.appender.dailyFile=org.apache.log4j.DailyRollingFileAppender
    log4j.appender.dailyFile.Threshold=DEBUG
    log4j.appender.dailyFile.ImmediateFlush=true
    log4j.appender.dailyFile.Append=true
    log4j.appender.dailyFile.File=/top/yunduo2018/raft/raft.log4j
    log4j.appender.dailyFile.DatePattern='.'yyyy-MM-dd
    log4j.appender.dailyFile.layout=org.apache.log4j.PatternLayout
    log4j.appender.dailyFile.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n
    
    log4j.appender.socket=org.apache.log4j.RollingFileAppender
    log4j.appender.socket.RemoteHost=localhost
    log4j.appender.socket.Port=5001
    log4j.appender.socket.LocationInfo=true
    # Set up for Log Factor 5
    log4j.appender.socket.layout=org.apache.log4j.PatternLayout
    log4j.appender.socket.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n
    # Log Factor 5 Appender
    log4j.appender.LF5_APPENDER=org.apache.log4j.lf5.LF5Appender
    log4j.appender.LF5_APPENDER.MaxNumberOfRecords=2000
    
    log4j.appender.mail=org.apache.log4j.net.SMTPAppender
    log4j.appender.mail.Threshold=FATAL
    log4j.appender.mail.BufferSize=10
    log4j.appender.mail.From = xxx@mail.com
    log4j.appender.mail.SMTPHost=mail.com
    log4j.appender.mail.Subject=Log4J Message
    log4j.appender.mail.To= xxx@mail.com
    log4j.appender.mail.layout=org.apache.log4j.PatternLayout
    log4j.appender.mail.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n
    log4j.appender.database=org.apache.log4j.jdbc.JDBCAppender
    log4j.appender.database.URL=jdbc:mysql://localhost:3306/test
    log4j.appender.database.driver=com.mysql.jdbc.Driver
    log4j.appender.database.user=root
    log4j.appender.database.password=
    log4j.appender.database.sql=INSERT INTO LOG4J (Message) VALUES('=[%-5p] %d(%r) --> [%t] %l: %m %x %n')
    log4j.appender.database.layout=org.apache.log4j.PatternLayout
    log4j.appender.database.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n
    
    
    log4j.appender.im = net.cybercorlin.util.logger.appender.IMAppender
    log4j.appender.im.host = mail.cybercorlin.net
    log4j.appender.im.username = username
    log4j.appender.im.password = password
    log4j.appender.im.recipient = corlin@cybercorlin.net
    log4j.appender.im.layout=org.apache.log4j.PatternLayout
    log4j.appender.im.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l\: %m %x %n

Java代码调用：

import org.apache.log4j.Logger;
    
    //声明对象
    private static final Logger log=Logger.getLogger(DefaultRocksDBUtil.class);
    
    //其它代码
    
    //调用info等方法
    log.info("对象创建成功");