很多时候我们为了在类中加日志不得不写一行，而且还要去手动改XXX这个类名

private static Logger log = LoggerFactory.getLogger(XXX.class);

第二个问题，我特别喜欢这种形式：

log.info("我在XXX 改了 {} 变量", "name");

既省去了可恶的isInfoEnabled()的判断，还避免了拼接字符串，但是呀

log.error("错误消息", e);

这样就不支持了，烦躁……

写多了就觉得这种厌烦的工作实在让人无法忍受，于是就封装了下。

Demo：

import com.xiaoleilu.hutool.log.Log;

import com.xiaoleilu.hutool.log.LogFactory;

import com.xiaoleilu.hutool.log.dialect.ApacheCommonsLogFactory;

import com.xiaoleilu.hutool.log.dialect.ConsoleLogFactory;

import com.xiaoleilu.hutool.log.dialect.JdkLogFactory;

import com.xiaoleilu.hutool.log.level.Level;

public class LogDemo {

public static void main(String[] args) {

Log log = LogFactory.get();

System.out.println("----------------------------自动选择日志------------------------------");

// 自动选择日志实现

log.debug("This is {} log", Level.DEBUG);

log.info("This is {} log", Level.INFO);

log.warn("This is {} log", Level.WARN);

log.error("This is {} log", Level.ERROR);

System.out.println("----------------------------自定义为Common Log日志------------------------------");

// 自定义日志实现

LogFactory.setCurrentLogFactory(new ApacheCommonsLogFactory());

log = LogFactory.get();

log.debug("This is {} log", Level.DEBUG);

log.info("This is {} log", Level.INFO);

log.warn("This is {} log", Level.WARN);

log.error("This is {} log", Level.ERROR);

System.out.println("----------------------------自定义为JDK Log日志------------------------------");

// 自定义日志实现

LogFactory.setCurrentLogFactory(new JdkLogFactory());

log = LogFactory.get();

log.debug("This is {} log", Level.DEBUG);

log.info("This is {} log", Level.INFO);

log.warn("This is {} log", Level.WARN);

log.error("This is {} log", Level.ERROR);

System.out.println("----------------------------自定义为Console Log日志------------------------------");

// 自定义日志实现

LogFactory.setCurrentLogFactory(new ConsoleLogFactory());

log = LogFactory.get();

log.debug("This is {} log", Level.DEBUG);

log.info("This is {} log", Level.INFO);

log.warn("This is {} log", Level.WARN);

log.error("This is {} log", Level.ERROR);

}

}

总结下来如果日志比较少，可以直接使用静态方法StaticLog.xxx，如果日志量很大，那么首先要构建好Logger，使用：

private static final Log log = LogFactotry.get();

log.debug("This is {} log", Level.DEBUG);

log.info("This is {} log", Level.INFO);

log.warn("This is {} log", Level.WARN);

log.error("This is {} log", Level.ERROR);

比之前简短了很多，而且随便复制。 调用log.xxx(log, "消息");

对于不能使用format的情况，我把Throwable放在前面了，这样就可以使用动态参数了 Object... argument

好吧，就到这里，欢迎批评指正以及提供意见~~~