LomBok 的相关目录已经整理出来,希望大家可以根据需求自助学习,好工具要大家分享:
@Cleanup ????
@Getter, @Setter
@ToString
@EqualsAndHashCode
@Constructor
@Data & @Value
@SneakyThrows
@Synchronized
@Getter(lazy=true)
@Log
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这是本系列最后一个annotation了,也是Lombok里面最好用的一个了,我们每天写项目都会有很多日志需要记录,很多人都写过这样的代码:
class="java">private static final org.apache.commons.logging.Log log = org.apache.commons.logging.LogFactory.getLog(LogExample.class);
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Lombok的方便不是说说而已的,哪里有重复,哪里就有Lombok(YY的 :) ),Lombok封装了许多主流的Log库,提供了一系列关于Log 的annotation。下面就是所有的annotation会代表哪些特定的类 :
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@CommonsLog Creates private static final org.apache.commons.logging.Log log = org.apache.commons.logging.LogFactory.getLog(LogExample.class); @Log Creates private static final java.util.logging.Logger log = java.util.logging.Logger.getLogger(LogExample.class.getName()); @Log4j Creates private static final org.apache.log4j.Logger log = org.apache.log4j.Logger.getLogger(LogExample.class); @Log4j2 Creates private static final org.apache.logging.log4j.Logger log = org.apache.logging.log4j.LogManager.getLogger(LogExample.class); @Slf4j Creates private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(LogExample.class); @XSlf4j Creates private static final org.slf4j.ext.XLogger log = org.slf4j.ext.XLoggerFactory.getXLogger(LogExample.class);
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就用其中的几个举个例子吧:
import lombok.extern.java.Log; import lombok.extern.slf4j.Slf4j; @Log public class LogExample { public static void main(String... args) { log.error("Something's wrong here"); } } @Slf4j public class LogExampleOther { public static void main(String... args) { log.error("Something else is wrong here"); } } @CommonsLog(topic="CounterLog") public class LogExampleCategory { public static void main(String... args) { log.error("Calling the 'CounterLog' with a message"); } }
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翻译一下,代码如下:
public class LogExample { private static final java.util.logging.Logger log = java.util.logging.Logger.getLogger(LogExample.class.getName()); public static void main(String... args) { log.error("Something's wrong here"); } } public class LogExampleOther { private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(LogExampleOther.class); public static void main(String... args) { log.error("Something else is wrong here"); } } public class LogExampleCategory { private static final org.apache.commons.logging.Log log = org.apache.commons.logging.LogFactory.getLog("CounterLog"); public static void main(String... args) { log.error("Calling the 'CounterLog' with a message"); } }
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想必不用多说了,例子一看就懂了,唠叨一句就是annotation提供一个topic选项,可以定制化getLog方法的参数。 为什么没提供backlog呢? 一直用backlog啊