springboot整合log4j打印日志

1、排除springboot自带log依赖

        
            org.springframework.boot
            spring-boot-starter
            
                
                    org.springframework.boot
                    spring-boot-starter-logging
                
            
        

2、添加日志框架依赖

        
        
            org.slf4j
            slf4j-api
            1.7.21
        
        
            org.slf4j
            slf4j-log4j12
            1.7.21
        

3、创建log4j.properties文件，并放在资源目录文件下src/main/resource

log4j.rootLogger=DEBUG,stdout,file
log4j.additivity.org.apache=true

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.threshold=INFO
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n 

log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.DatePattern='.'yyyy-MM-dd-HH-mm
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
log4j.appender.file.Threshold=INFO
log4j.appender.file.append=true
log4j.appender.file.File=C:/myLog/foodie-api.log

4、使用

//注意导入的是import org.slf4j.Logger;下的Logger
final static Logger logger = LoggerFactory.getLogger(HelloController.class);

logger.debug("debug: hello~");
logger.info("info: hello~");
logger.warn("warn: hello~");
logger.error("error: hello~");

举例

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import springfox.documentation.annotations.ApiIgnore;

@ApiIgnore      //swagger2忽略此controller
@RestController //所有请求都是json对象
public class HelloController {

    final static Logger logger = LoggerFactory.getLogger(HelloController.class);

    @GetMapping("/hello")
    public Object hello(){

        logger.debug("debug: hello~");
        logger.info("info: hello~");
        logger.warn("warn: hello~");
        logger.error("error: hello~");

        return "hello world!";
    }
}

结果：

控制台

log文件