com.fr.third.apache.log4j

类 Logger

java.lang.Object

com.fr.third.apache.log4j.Category

com.fr.third.apache.log4j.Logger

所有已实现的接口:

AppenderAttachable

直接已知子类:

NOPLogger, RootCategory, RootLogger

public class Logger
extends Category

This is the central class in the log4j package. Most logging operations, except configuration, are done through this class.

从以下版本开始:

log4j 1.2

作者:

Ceki Gülcü

字段概要

从类继承的字段 com.fr.third.apache.log4j.Category

additive, level, name, parent, repository, resourceBundle

构造器概要

构造器

限定符	构造器和说明
protected	Logger(java.lang.String name)

方法概要

方法

限定符和类型	方法和说明
static Logger	getLogger(java.lang.Class clazz) Shorthand for getLogger(clazz.getName()).
static Logger	getLogger(java.lang.String name) Retrieve a logger named according to the value of the name parameter.
static Logger	getLogger(java.lang.String name, LoggerFactory factory) Like getLogger(String) except that the type of logger instantiated depends on the type returned by the LoggerFactory.makeNewLoggerInstance(java.lang.String) method of the factory parameter.
static Logger	getRootLogger() Return the root logger for the current logger repository.
boolean	isTraceEnabled() Check whether this category is enabled for the TRACE Level.
void	trace(java.lang.Object message) Log a message object with the TRACE level.
void	trace(java.lang.Object message, java.lang.Throwable t) Log a message object with the TRACE level including the stack trace of the Throwablet passed as parameter.

从类继承的方法 com.fr.third.apache.log4j.Category

addAppender, assertLog, callAppenders, debug, debug, error, error, exists, fatal, fatal, forcedLog, getAdditivity, getAllAppenders, getAppender, getChainedPriority, getCurrentCategories, getDefaultHierarchy, getEffectiveLevel, getHierarchy, getInstance, getInstance, getLevel, getLoggerRepository, getName, getParent, getPriority, getResourceBundle, getResourceBundleString, getRoot, info, info, isAttached, isDebugEnabled, isEnabledFor, isErrorEnalbed, isInfoEnabled, isWarnEnabled, l7dlog, l7dlog, log, log, log, removeAllAppenders, removeAppender, removeAppender, setAdditivity, setLevel, setPriority, setResourceBundle, shutdown, warn, warn

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

Logger

protected Logger(java.lang.String name)

方法详细资料

getLogger

public static Logger getLogger(java.lang.String name)

Retrieve a logger named according to the value of the name parameter. If the named logger already exists, then the existing instance will be returned. Otherwise, a new instance is created.

By default, loggers do not have a set level but inherit it from their neareast ancestor with a set level. This is one of the central features of log4j.

参数:

name - The name of the logger to retrieve.

getLogger

public static Logger getLogger(java.lang.Class clazz)

Shorthand for getLogger(clazz.getName()).

参数:

clazz - The name of clazz will be used as the name of the logger to retrieve. See getLogger(String) for more detailed information.

getRootLogger

public static Logger getRootLogger()

Return the root logger for the current logger repository.

The Logger.getName() method for the root logger always returns string value: "root". However, calling Logger.getLogger("root") does not retrieve the root logger but a logger just under root named "root".

In other words, calling this method is the only way to retrieve the root logger.

getLogger

public static Logger getLogger(java.lang.String name,
               LoggerFactory factory)

Like getLogger(String) except that the type of logger instantiated depends on the type returned by the LoggerFactory.makeNewLoggerInstance(java.lang.String) method of the factory parameter.

This method is intended to be used by sub-classes.

参数:

name - The name of the logger to retrieve.

factory - A LoggerFactory implementation that will actually create a new Instance.

从以下版本开始:

0.8.5

trace

public void trace(java.lang.Object message)

Log a message object with the TRACE level.

参数:

message - the message object to log.

从以下版本开始:

1.2.12

另请参阅:

for an explanation of the logic applied.

trace

public void trace(java.lang.Object message,
         java.lang.Throwable t)

Log a message object with the TRACE level including the stack trace of the Throwablet passed as parameter.

See Category.debug(Object) form for more detailed information.

参数:

message - the message object to log.

t - the exception to log, including its stack trace.

从以下版本开始:

1.2.12

isTraceEnabled

public boolean isTraceEnabled()

Check whether this category is enabled for the TRACE Level.

返回:

boolean - true if this category is enabled for level TRACE, false otherwise.

从以下版本开始:

1.2.12