logback同时输出到控制台和文件，并按级别输出到不同的文件配置开箱即用

第一步：添加maven依赖，编写pom.xml文件

<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.2.3</version>
</dependency>
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-core</artifactId>
    <version>1.2.3</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.21</version>
</dependency>

第二步：创建logback-test.xml文件，创建位置如下

logback-test.xml文件内容如下

<?xml version="1.0" encoding="UTF-8"  ?>
<configuration>
    <!-- 输出到控制台 -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <!-- 输出的格式 -->
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <!--输出错误日志-->
    <appender name="ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- 日志名称的格式 -->
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
        <file>logs/error.log</file>
        <!-- 配置滚动的策略 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>logs/%d{yyyy-MM-dd}/error.log</fileNamePattern>
            <!-- 保存的最长时间：天数 -->
            <maxHistory>10</maxHistory>
        </rollingPolicy>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>

    </appender>
    <appender name="INFO" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
        <file>logs/info.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>logs/%d{yyyy-MM-dd}/XXXXMo.log</fileNamePattern>
            <maxHistory>10</maxHistory>
        </rollingPolicy>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <!--可以修改成INFO，DEBUG等-->
            <level>DEBUG</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>

    </appender>
    <root level="debug">
        <appender-ref ref="STDOUT" />
        <appender-ref ref="ERROR" />
        <appender-ref ref="INFO"/>
    </root>
</configuration>

第三步(仅为测试)：

@SpringBootApplication
@Component
@RestController
public class DemoApplication {

    private static final Logger logger = LoggerFactory.getLogger(DemoApplication.class);
    @Autowired
    private Test test;
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

    @RequestMapping("/get")
    public void get() {
        logger.error(DemoApplication.class+"error");
        logger.info(DemoApplication.class+"success");
    }
}

检查效果(控制台输出：)

日志文件输出：

好的，logback配置，同时输出控制台和日志文件，日志文件按不同级别输出到不同日志文件到此结束。