1、引入依赖(pom.xml)

<dependencies>
    <dependency>
	    <groupId>org.springframework.boot</groupId>
	    <artifactId>spring-boot-starter-web</artifactId>
	    <exclusions>
		    <!-- 排除自带的logback依赖 -->
		    <exclusion>
			    <groupId>org.springframework.boot</groupId>
			    <artifactId>spring-boot-starter-logging</artifactId>
		    </exclusion>
	    </exclusions>
    </dependency>

    <dependency>
	    <groupId>org.springframework.boot</groupId>
	    <artifactId>spring-boot-starter-log4j</artifactId>
	    <version>1.3.8.RELEASE</version>
    </dependency>
</dependencies>

2、创建log4j.properties文件

#定义根节点
log4j.rootLogger=info,error,CONSOLE,info

#设置控制台打印
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender     
#设置为格式化打印 PatternLayout
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout     
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n    


#设置info级别的日志
#log4j.logger.info=info
#输出到日志文件
log4j.appender.info=org.apache.log4j.DailyRollingFileAppender
log4j.appender.info.layout=org.apache.log4j.PatternLayout     
log4j.appender.info.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n  
#日期文件名格式化
log4j.appender.info.datePattern='.'yyyy-MM-dd
log4j.appender.info.Threshold = info   
#是否追加
log4j.appender.info.append=true
#文件存放位置
log4j.appender.info.File=E:/dance/demo/log/info.log

#log4j.logger.error=error
log4j.appender.error=org.apache.log4j.DailyRollingFileAppender
log4j.appender.error.layout=org.apache.log4j.PatternLayout     
log4j.appender.error.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n  
log4j.appender.error.datePattern='.'yyyy-MM-dd
log4j.appender.error.Threshold = error
log4j.appender.error.append=true
log4j.appender.error.File=E:/dance/demo/log/error.log

#log4j.logger.DEBUG=DEBUG
log4j.appender.DEBUG=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DEBUG.layout=org.apache.log4j.PatternLayout     
log4j.appender.DEBUG.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n  
log4j.appender.DEBUG.datePattern='.'yyyy-MM-dd
log4j.appender.DEBUG.Threshold = DEBUG   
log4j.appender.DEBUG.append=true
log4j.appender.DEBUG.File=E:/dance/demo/log/dubug.log

3、使用

package com.supreme.supreme_api.controller;


import com.supreme.supreme_api.SupremeApiApplication;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;
import java.util.Map;

@Controller
@RequestMapping("/test")
public class TestController {
    @Autowired
    private JdbcTemplate jdbcTemplate;
    private static final Logger logger = Logger.getLogger(TestController.class);
    @GetMapping("/index")
    @ResponseBody
    public List<Map<String,Object>> test() {
        logger.info("哈哈DemoApplication start!!!");

        String sql = "select * from manager";
        List<Map<String,Object>> list = jdbcTemplate.queryForList(sql);
         return list;
    }
}

4、输出