slf4j自动绑定实现类的方式基于约定：它要求你在实现类的包名和拿到LoggerFactory实例的文件路径必须是：org/slf4j/impl/StaticLoggerBinder.class
有了这个约定就好办了，slf4j在自己的基本类LoggerFactory里，直接调用实现类StaticLoggerBinder拿到LoggerFactory的实例
看代码：下面是我自己实现的一个：StaticLoggerBinder
public class StaticLoggerBinder {
private static final StaticLoggerBinder SINGLETON = new StaticLoggerBinder();
private static final String loggerFactoryClassStr = MyLoggerFactory.class.getName();
public static final StaticLoggerBinder getSingleton() {
return SINGLETON;
}
/**
* 初始化我自己的LoggerFactory
*
*/
private StaticLoggerBinder() {
loggerFactory = new MyLoggerFactory();
}
private final ILoggerFactory loggerFactory;
/**
* 得到实现类
*
* @return
*/
public ILoggerFactory getLoggerFactory() {
return loggerFactory;
}
/**
* 得到实现类的名字
*
* @return
*/
public String getLoggerFactoryClassStr() {
return loggerFactoryClassStr;
}
}
slf4j自动绑定实现类原理