您有多個記錄器實例的原因是因爲您希望它們在記錄時表現不同(通常通過輸出它們配置的類名稱)。如果你不關心這一點,你可以在一個類中創建一個靜態記錄器實例,並在整個地方使用它。
要創建單個記錄器,您可以簡單地創建一個靜態實用程序日誌記錄類爲單點記錄器,因此如果我們需要更改記錄器包,則只會更新此類。
final public class Logger {
private static final org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger("Log");
enum Level {Error, Warn, Fatal, Info, Debug}
private Logger() {/* do nothing */};
public static void logError(Class clazz, String msg) {
log(Level.Error, clazz, msg, null);
}
public static void logWarn(Class clazz, String msg) {
log(Level.Warn, clazz, msg, null);
}
public static void logFatal(Class clazz, String msg) {
log(Level.Fatal, clazz, msg, null);
}
public static void logInfo(Class clazz, String msg) {
log(Level.Info, clazz, msg, null);
}
public static void logDebug(Class clazz, String msg) {
log(Level.Debug, clazz, msg, null);
}
public static void logError(Class clazz, String msg, Throwable throwable) {
log(Level.Error, clazz, msg, throwable);
}
public static void logWarn(Class clazz, String msg, Throwable throwable) {
log(Level.Warn, clazz, msg, throwable);
}
public static void logFatal(Class clazz, String msg, Throwable throwable) {
log(Level.Fatal, clazz, msg, throwable);
}
public static void logInfo(Class clazz, String msg, Throwable throwable) {
log(Level.Info, clazz, msg, throwable);
}
public static void logDebug(Class clazz, String msg, Throwable throwable) {
log(Level.Debug, clazz, msg, throwable);
}
private static void log(Level level, Class clazz, String msg, Throwable throwable) {
String message = String.format("[%s] : %s", clazz, msg);
switch (level) {
case Info:
logger.info(message, throwable);
break;
case Warn:
logger.warn(message, throwable);
break;
case Error:
logger.error(message, throwable);
break;
case Fatal:
logger.fatal(message, throwable);
break;
default:
case Debug:
logger.debug(message, throwable);
}
}
}
我的確如你所提到的那樣,但只有Main類中的日誌被打印,其他方法中的日誌不會被打印?如何解決它 –