private static final Log log = LogFactory.getLog(DataSourceManager.class); 它的作用?

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privatestaticfinalLoglog=LogFactory.getLog(DataSourceManager.class);它的作用?privatestaticfinalLoglog=Lo

private static final Log log = LogFactory.getLog(DataSourceManager.class); 它的作用?
private static final Log log = LogFactory.getLog(DataSourceManager.class); 它的作用?

private static final Log log = LogFactory.getLog(DataSourceManager.class); 它的作用?
private static final Log log 是定义一个Log型的常量
LogFactory.getLog(DataSourceManager.class);这个方法会返回一个Log型的对象