Logback日誌工具使用詳解
阿新 • • 發佈:2019-02-13
Logback是由log4j創始人設計的又一個開源日誌元件。logback當前分成三個模組:logback-core,logback- classic和logback-access。logback-core是其它兩個模組的基礎模組。logback-classic是log4j的一個 改良版本。此外logback-classic完整實現SLF4J API使你可以很方便地更換成其它日誌系統如log4j或JDK14 Logging。logback-access訪問模組與Servlet容器整合提供通過Http來訪問日誌的功能。 --轉自百度百科
由於Logback比log4j和SLF4J擁有眾多優點,如效能(據說有時達到10倍以上),並且支援自動載入配置檔案,自動刪除舊的日誌檔案,以及同一個logback配置檔案同時適應開發,測試,生產等。因此Logback官方強烈建議開發人員從log4j轉到使用Logback。
一、實戰
1. logback的maven依賴:
<dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-core</artifactId> <version>1.1.7</version> </dependency> <!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>1.1.7</version> </dependency> <!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-access --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-access</artifactId> <version>1.1.7</version> </dependency>
2. logback.xml檔案配置:
<?xml version="1.0" encoding="UTF-8"?> <configuration debug="true" scan="true" scanPeriod="30 seconds"> <!--控制檯輸出日誌資訊--> <appender name="CONSOLE-LOG" class="ch.qos.logback.core.ConsoleAppender"> <!-- encoders are by default assigned the type ch.qos.logback.classic.encoder.PatternLayoutEncoder --> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss} [%level] - %m%n</pattern> </encoder> </appender> <!-- 輸出error級別的日誌到error.log檔案中 --> <appender name="ERROR-LOG" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>logs/error.log</file> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss} [%class:%line] - %m%n</pattern> </encoder> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>ERROR</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <!-- daily rollover --> <fileNamePattern>error.%d{yyyy-MM-dd}.log.zip</fileNamePattern> <!-- keep 30 days' worth of history --> <maxHistory>30</maxHistory> </rollingPolicy> </appender> <!-- 輸出info級別的日誌到error.log檔案中 --> <appender name="INFO-LOG" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>logs/info.log</file> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss} [%class:%line] - %m%n</pattern> </encoder> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>INFO</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy"> <fileNamePattern>info.%i.log</fileNamePattern> <minIndex>1</minIndex> <maxIndex>3</maxIndex> </rollingPolicy> <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy"> <maxFileSize>5MB</maxFileSize> </triggeringPolicy> </appender> <appender name="DEBUG-LOG" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>logs/debug.log</file> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss} [%class:%line] - %m%n</pattern> </encoder> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>INFO</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy"> <fileNamePattern>debug.%i.log</fileNamePattern> <minIndex>1</minIndex> <maxIndex>3</maxIndex> </rollingPolicy> <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy"> <maxFileSize>5MB</maxFileSize> </triggeringPolicy> </appender> <root level="debug"> <appender-ref ref="CONSOLE-LOG" /> <appender-ref ref="ERROR-LOG" /> <appender-ref ref="INFO-LOG" /> <appender-ref ref="DEBUG-LOG" /> </root> </configuration>
logback的專案目錄結構:
3.LogBackTest.java
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class LogBackTest {
private static Logger Log = LoggerFactory.getLogger(LogBackTest.class);
@Test
public void test() {
Log.debug("debug log");
Log.info("info log");
Log.error("error log");
}
}
4. 結果輸出:
4.1 console:
2017-02-08 14:41:10 [DEBUG] - debug log
2017-02-08 14:41:10 [INFO] - info log
2017-02-08 14:41:10 [ERROR] - error log
4.2 日誌檔案輸出:
debug.log的內容:
2017-02-08 14:41:10 [LogBackTest:13] - info log
error.log的內容:
2017-02-08 14:41:10 [LogBackTest:14] - error log
info.log的內容:
2017-02-08 14:41:10 [LogBackTest:13] - info log
看,簡單吧!