【Java】Log4j日志

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

# 2. 输出格式
## log4j.appender.名称=输出位置（固定值，由log4j提供）
## log4j.appender.名称.Target=方式
## log4j.appender.名称.layout=布局（固定值）
## log4j.appender.名称.layout.ConversionPattern=格式

# 2.1 将日志输出到控制台
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c:%L - %m%n

# 2.2 将日志输出到文件
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=d:/file.log
log4j.appender.file.Append=false
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c:%L - %m%n

#1.log4j.rootLogger=日志级别, 输出方式1, 输出方式2, ...
## 日志级别：debug、info、warn、error
log4j.rootLogger=trace, stdout, file

# 3 自定义日志级别
## log4j.logger.包=日志级别

#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

log4j.logger.org.apache.ibatis.transaction = info
log4j.logger.org.apache.ibatis.io = info
log4j.logger.org.apache.ibatis.datasource = info
log4j.logger.org.apache.ibatis.logging = info

package com.czxy.log;

import org.apache.log4j.Logger;

/**
 * @author 桐叔
 * @email liangtong@itcast.cn
 * @description
 */
public class TestLog4j {
    private static Logger logger = Logger.getLogger(TestLog4j.class);

    public static void main(String[] args) {
        logger.trace("追踪");
        logger.debug("调试");
        logger.info("信息");
        logger.warn("警告");
        logger.error("错误");
        logger.fatal("致命");
    }
}

#log4j.rootLogger=日志级别, 输出源1, 输出源2, ...
log4j.rootLogger=trace, stdout, file

# 将日志输出到控制台
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c:%L - %m%n

# 将日志输出到文件
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=d:/file.log
log4j.appender.file.Append=false
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c:%L - %m%n

# 每日输出到一个新文件
log4j.appender.daily=org.apache.log4j.DailyRollingFileAppender
log4j.appender.daily.File=d:/daily.log
log4j.appender.daily.Append=true
log4j.appender.daily.DatePattern='-'yyyy-MM-dd-HH-mm'.log'
log4j.appender.daily.layout=org.apache.log4j.PatternLayout
log4j.appender.daily.layout.ConversionPattern=%d{ABSOLUTE} %5p %c:%L - %m%n

CREATE TABLE `log` (
	`log_id` INT(11) NOT NULL AUTO_INCREMENT,
	`project_name` VARCHAR(255) DEFAULT NULL COMMENT '目项名',
	`create_date` VARCHAR(255) DEFAULT NULL COMMENT '创建时间',
	`level` VARCHAR(255) DEFAULT NULL COMMENT '优先级',
	`category` VARCHAR(255) DEFAULT NULL COMMENT '所在类的全名',
	`file_name` VARCHAR(255) DEFAULT NULL COMMENT '输出日志消息产生时所在的文件名称 ',
	`thread_name` VARCHAR(255) DEFAULT NULL COMMENT '日志事件的线程名',
	`line` VARCHAR(255) DEFAULT NULL COMMENT '号行',
	`all_category` VARCHAR(255) DEFAULT NULL COMMENT '日志事件的发生位置',
	`message` VARCHAR(4000) DEFAULT NULL COMMENT '输出代码中指定的消息',
	PRIMARY KEY (`log_id`)
);

   <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.32</version>
        </dependency>

# 2.4 输出到数据库
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=1234
log4j.appender.database.Sql=INSERT INTO log(project_name,create_date,level,category,file_name,thread_name,line,all_category,message) values('czxy','%d{yyyy-MM-dd HH:mm:ss}','%p','%c','%F','%t','%L','%l','%m')
log4j.appender.database.layout=org.apache.log4j.PatternLayout

# 2.5 将日志以html输出到控制台
log4j.appender.html=org.apache.log4j.ConsoleAppender
log4j.appender.html.Target=System.out
log4j.appender.html.layout=org.apache.log4j.HTMLLayout
log4j.appender.html.layout.title=这是页面标题
log4j.appender.html.layout.locationInfo=false

log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c:%L - %m%n

# 2.6 增强版自定义布局
log4j.appender.enhanced=org.apache.log4j.ConsoleAppender
log4j.appender.enhanced.Target=System.out
log4j.appender.enhanced.layout=org.apache.log4j.EnhancedPatternLayout
log4j.appender.enhanced.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1.}:%L - %m%n

#自定义日志级别
log4j.logger.包=日志级别

package com.czxy.log.demo.mapper;

import org.apache.log4j.Logger;

/**
 * @author 桐叔
 * @email liangtong@itcast.cn
 * @description
 */
public class DemoMapper {

    private static Logger logger = Logger.getLogger(DemoMapper.class);

    public void find() {
        logger.debug("mapper debug");
        logger.info("mapper info");
        logger.warn("mapper warn");
        logger.error("mapper error");
        System.out.println("查询 mapper");
    }
}

package com.czxy.log.demo.service;

import com.czxy.log.demo.mapper.DemoMapper;
import org.apache.log4j.Logger;

/**
 * @author 桐叔
 * @email liangtong@itcast.cn
 * @description
 */
public class DemoService {
    private DemoMapper demoMapper = new DemoMapper();

    private static Logger logger = Logger.getLogger(DemoService.class);

    public void find() {
        logger.debug("service debug");
        logger.info("service info");
        logger.warn("service warn");
        logger.error("service error");
        System.out.println("查询service");
        demoMapper.find();
    }
}

package com.czxy.log.demo;

import com.czxy.log.demo.service.DemoService;

/**
 * @author 桐叔
 * @email liangtong@itcast.cn
 * @description
 */
public class TestDemo {
    public static void main(String[] args) {
        DemoService demoService = new DemoService();
        demoService.find();
    }
}

#log4j.logger.包=日志级别
log4j.logger.com.czxy.log.demo.mapper = warn
log4j.logger.com.czxy.log.demo.service = info