http://log4cplus.sourceforge.net/codeexamples.html
里面自帶的三個例程
Hello World Example
#include?<log4cplus/logger.h>
#include?<log4cplus/configurator.h>
#include?<iomanip>
using?namespace?log4cplus;
int
main()
{
????BasicConfigurator?config;
????config.configure();
????Logger?logger?=?Logger::getInstance("main");
????LOG4CPLUS_WARN(logger,?"Hello,?World!");
????return?0;
}
ostream Example (Show how to write logging messages.)
#include?<log4cplus/logger.h>
#include?<log4cplus/configurator.h>
#include?<iomanip>
using?namespace?std;
using?namespace?log4cplus;
int
main()
{
????BasicConfigurator?config;
????config.configure();
????Logger?logger?=?Logger::getInstance("logger");
????LOG4CPLUS_WARN(logger,???"This?is"
???????????????????????????<<?"?a?reall"
???????????????????????????<<?"y?long?message."?<<?endl
???????????????????????????<<?"Just?testing?it?out"?<<?endl
???????????????????????????<<?"What?do?you?think?")
????LOG4CPLUS_WARN(logger,?"This?is?a?bool:?"?<<?true)
????LOG4CPLUS_WARN(logger,?"This?is?a?char:?"?<<?'x')
????LOG4CPLUS_WARN(logger,?"This?is?a?short:?"?<<?(short)-100)
????LOG4CPLUS_WARN(logger,?"This?is?a?unsigned?short:?"?<<?(unsigned?short)100)
????LOG4CPLUS_WARN(logger,?"This?is?a?int:?"?<<?(int)1000)
????LOG4CPLUS_WARN(logger,?"This?is?a?unsigned?int:?"?<<?(unsigned?int)1000)
????LOG4CPLUS_WARN(logger,?"This?is?a?long(hex):?"?<<?hex?<<?(long)100000000)
????LOG4CPLUS_WARN(logger,?"This?is?a?unsigned?long:?"?
???????????????????<<?(unsigned?long)100000000)
????LOG4CPLUS_WARN(logger,?"This?is?a?float:?"?<<?(float)1.2345)
????LOG4CPLUS_WARN(logger,?"This?is?a?double:?"?
??????????????????????????<<?setprecision(15)?
??????????????????????????<<?(double)1.2345234234)
????LOG4CPLUS_WARN(logger,?"This?is?a?long?double:?"?
??????????????????????????<<?setprecision(15)?
??????????????????????????<<?(long?double)123452342342.342)
????return?0;
}
Example (Shows how log messages can be filtered at runtime by adjusting the LogLevel.)
#include?<log4cplus/logger.h>
#include?<log4cplus/configurator.h>
#include?<iostream>
using?namespace?std;
using?namespace?log4cplus;
Logger?logger?=?Logger::getInstance("main");
void?printMessages()
{
????LOG4CPLUS_TRACE(logger,?"printMessages()");
????LOG4CPLUS_DEBUG(logger,?"This?is?a?DEBUG?message");
????LOG4CPLUS_INFO(logger,?"This?is?a?INFO?message");
????LOG4CPLUS_WARN(logger,?"This?is?a?WARN?message");
????LOG4CPLUS_ERROR(logger,?"This?is?a?ERROR?message");
????LOG4CPLUS_FATAL(logger,?"This?is?a?FATAL?message");
}
int
main()
{
????BasicConfigurator?config;
????config.configure();
????logger.setLogLevel(TRACE_LOG_LEVEL);
????cout?<<?"***?calling?printMessages()?with?TRACE?set:?***"?<<?endl;
????printMessages();
????logger.setLogLevel(DEBUG_LOG_LEVEL);
????cout?<<?"\n***?calling?printMessages()?with?DEBUG?set:?***"?<<?endl;
????printMessages();
????logger.setLogLevel(INFO_LOG_LEVEL);
????cout?<<?"\n***?calling?printMessages()?with?INFO?set:?***"?<<?endl;
????printMessages();
????logger.setLogLevel(WARN_LOG_LEVEL);
????cout?<<?"\n***?calling?printMessages()?with?WARN?set:?***"?<<?endl;
????printMessages();
????logger.setLogLevel(ERROR_LOG_LEVEL);
????cout?<<?"\n***?calling?printMessages()?with?ERROR?set:?***"?<<?endl;
????printMessages();
????logger.setLogLevel(FATAL_LOG_LEVEL);
????cout?<<?"\n***?calling?printMessages()?with?FATAL?set:?***"?<<?endl;
????printMessages();
????return?0;
}