package chapters.introduction;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class HelloWorld1 {  public static void main(String[] args) {    Logger logger = LoggerFactory.getLogger("chapters.introduction.HelloWorld1");    logger.debug("Hello world.");  }}

<?xml version="1.0" encoding="UTF-8"?><configuration>    <!-- 定义日志输出格式 -->    <property name="LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36}[%line] - %msg%n" />    <!-- 输出到滚动文件 -->    <appender name="ACCESS" class="ch.qos.logback.core.rolling.RollingFileAppender">        <!-- 文件名 -->        <File>/tmp/log/api/access.log</File>        <!-- 配置基于时间的滚动策略 -->        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">            <!-- 滚动时间周期是从fileNamePattern推断出来的 -->            <!-- 比如格式：{yyyy-MM-dd}表示按天滚动；{yyyy-MM-dd_HH}表示按小时滚动 -->            <fileNamePattern>/tmp/log/api/access.%d{yyyy-MM-dd}.log</fileNamePattern>            <!-- 保留历史日志数量 -->            <maxHistory>7</maxHistory>        </rollingPolicy>        <encoder>            <pattern>${LOG_PATTERN}</pattern>        </encoder>    </appender>        <appender name="DEBUG_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">        <File>/tmp/log/api/debug.log</File>        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">            <fileNamePattern>/tmp/log/api/debug.%d{yyyy-MM-dd}.log</fileNamePattern>            <maxHistory>7</maxHistory>        </rollingPolicy>        <encoder>            <pattern>${LOG_PATTERN}</pattern>        </encoder>    </appender>    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">        <encoder>            <pattern>${LOG_PATTERN}</pattern>        </encoder>    </appender>    <logger name="com.xqb.api.commons.GlobalExceptionHandler" level="DEBUG"/>    <!-- 特定日志使用指定的appender -->    <logger name="org.springframework.web.servlet.DispatcherServlet" additivity="false" level="DEBUG">        <appender-ref ref="ACCESS"/>    </logger>    <logger name="org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor" additivity="false" level="DEBUG">        <appender-ref ref="ACCESS"/>    </logger>    <logger name="org.springframework.jdbc.core" level="TRACE"/>    <logger name="org.hibernate.type.descriptor.sql.BasicBinder" level="TRACE"/>    <logger name="org.hibernate.SQL" level="DEBUG"/>    <root level="INFO">        <!-- 启用的appender列表 -->        <!-- The ACCESS appender 不用加了，因为在定义DispatcherServlet logger时已经使用过 -->        <appender-ref ref="CONSOLE"/>        <appender-ref ref="DEBUG_FILE"/>    </root></configuration>

<dependency>    <groupId>org.slf4j</groupId>    <artifactId>slf4j-api</artifactId>    <version>${slf4j-version}</version></dependency><dependency>    <groupId>ch.qos.logback</groupId>    <artifactId>logback-classic</artifactId>    <version>1.1.2</version></dependency>