【SpringBoot】给SpringBoot程序配置个简单的logback(附简易版logback.xml下载)

本文涉及SpringBoot版本：v2.5.4

首先声明，pom.xml里不用配置。

把下面内容存到logback.xml(若不想敲字也可以点 https://files.cnblogs.com/files/heyang78/logback-xml-211015.rar 下载)里，然后保存到resource下。

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
    <!-- Where are log files -->
    <property name="LOG_HOME"
        value="./" />

    <!-- Output to Console -->
    <appender name="STDOUT"
        class="ch.qos.logback.core.ConsoleAppender">
        <encoder
            class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--%d:date，%thread:thread，%-5level：error/debug/info... %msg：message，%n:new 
                line -->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} - %msg%n</pattern>
        </encoder>
    </appender>

    <!-- Output to File -->
    <appender name="FILE"
        class="ch.qos.logback.core.rolling.RollingFileAppender">

        <rollingPolicy
            class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME}/log.%d{yyyy-MM-dd}.%i.log
            </fileNamePattern>
            <maxFileSize>1000MB</maxFileSize>
            <MaxHistory>60</MaxHistory>
        </rollingPolicy>

        <encoder
            class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--%d:date，%thread:thread，%-5level：error/debug/info... %msg：message，%n:new 
                line -->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50}
                -%msg%n</pattern>
        </encoder>
    </appender>

    <!-- log level TRACE, DEBUG, INFO, WARN, ERROR, ALL and OFF,default：DEBUG. -->
    <root level="INFO">
        <appender-ref ref="STDOUT" />
        <appender-ref ref="FILE" />
    </root>
</configuration>

然后在application.yml里写一句：

logging: 
    config: classpath:logback.xml

注意这里logging是顶到左边的，和spring一个级别。

最后，在代码里就可以用了。

package com.hy.myapp.action;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;

import com.hy.myapp.mapper.UserMapper;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Controller
public class UserCtrl {
    private final static Logger logger = LoggerFactory.getLogger(UserCtrl.class);
    
    @Autowired
    private UserMapper userMapper;
    
    @PostMapping(value="/userRegister")
    public String register(String uname,String pswd,String repswd,String email) {
        logger.info("Someone register.");
        userMapper.addUser(uname, repswd, email);
        
        return "login";
    }
    
    @PostMapping(value="/userLogin")
    public String login(String uname,String pswd) {
        
        
        return "login";
    }
}