main.cpp.obj : error LNK2019: unresolved external symbol "public: __thiscall log4cplus::PatternLayout::PatternLayout(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (??0PatternLayout@log4cplus@@QAE@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) referenced in function "int __cdecl test_log4plus(void)" (?test_log4plus@@YAHXZ)
main.cpp.obj : error LNK2019: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) referenced in function "int __cdecl test_log4plus(void)" (?test_log4plus@@YAHXZ)
main.cpp.obj : error LNK2019: unresolved external symbol "class std::basic_ostringstream<char,struct std::char_traits<char>,class std::allocator<char> > & __cdecl log4cplus::detail::get_macro_body_oss(void)" (?get_macro_body_oss@detail@log4cplus@@YAAAV?$basic_ostringstream@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) referenced in function "int __cdecl test_log4plus(void)" (?test_log4plus@@YAHXZ)
main.cpp.obj : error LNK2019: unresolved external symbol "void __cdecl log4cplus::detail::macro_forced_log(class log4cplus::Logger const &,int,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,char const *,int,char const *)" (?macro_forced_log@detail@log4cplus@@YAXABVLogger@2@HABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@PBDH2@Z) referenced in function "int __cdecl test_log4plus(void)" (?test_log4plus@@YAHXZ)
..\build\Release\lib\mywincom.exe : fatal error LNK1120: 4 unresolved externals

#define UNICODE
#include <log4cplus/logger.h>
#include <log4cplus/layout.h>
#include <log4cplus/configurator.h>
#include "logger.h"
Logger logger = Logger::getInstance(LOG4CPLUS_TEXT("logmain"));
void initLogger(bool isDebug) {
    if (isDebug) {
        PropertyConfigurator::doConfigure(LOG4CPLUS_TEXT("./log4cplus_d.conf"));
    } else {
        PropertyConfigurator::doConfigure(LOG4CPLUS_TEXT("./log4cplus.conf"));
    }
}
void shutDown(){
    log4cplus::Logger::shutdown();
}
void close()
{
    log4cplus::deinitialize();
}

##debug可以如下配置
log4cplus.logger.logmain = TRACE, console
log4cplus.appender.console = log4cplus::ConsoleAppender
log4cplus.appender.console.layout = log4cplus::PatternLayout
log4cplus.appender.console.layout.ConversionPattern = [%D{%m/%d/%y %H:%M:%S,%q} %-5p] - %m%n
##正式生成文件的可以如下配置：
log4cplus.logger.logmain = INFO, file
log4cplus.appender.file = log4cplus::FileAppender
log4cplus.appender.file.File = ./log/myapp.log
log4cplus.appender.file.MaxFileSize = 10M
log4cplus.appender.file.Append = true
log4cplus.appender.file.layout = log4cplus::PatternLayout
log4cplus.appender.file.layout.ConversionPattern = [%D{%m/%d/%y %H:%M:%S,%q} %-5p] - %m%n

int main(){
    std::cout << "hello test "<< std::endl;
    //test_log4plus();
    initLogger(true);
    LOG_DEBUG("this is debug");
    LOG_INFO("this is info");
    LOG_TRACE("this is trace");
    LOG_WARN("this is warn");
    LOG_ERROR("this is error");
    LOG_FATAL("this is fatal");
    LOG_DEBUG("this is:" << 666);
    LOG_DEBUG_F(LOG4CPLUS_TEXT("this is %.2f"),5.333);
    shutDown();
    close();
  return 0;
}

#ifndef MYLOGGER_H
#define MYLOGGER_H
#define UNICODE
#include <iostream>
#include <string>
#include <mutex>
#include <log4cplus/helpers/loglog.h>
#include <log4cplus/logger.h>
#include <log4cplus/initializer.h>
#include <log4cplus/log4cplus.h>
#include <log4cplus/fileappender.h>
#include <log4cplus/consoleappender.h>
#include <log4cplus/layout.h>
#include <log4cplus/tchar.h>
#include <log4Cplus/configurator.h>
#include <log4Cplus/loggingmacros.h>
#include <log4Cplus/helpers/stringhelper.h>
#define MY_LOG_FILE "log.properties"
using namespace log4cplus;
using namespace log4cplus::helpers;
//单列模式
class MyLogger
{
public:
    static MyLogger* getInstace();
    //static void deleteInstance();
    Logger logger;
    Logger console;
    void shutDown();
    void closeLog();
private:
    MyLogger();
    ~MyLogger(){
        std::cout << "Destory singleton for log4cplus!!" <<std::endl;
    }
    static MyLogger *m_logger;
    static std::mutex myMutex;
private:
    //内部类来删除对象
    class Garbo{
    public:
        Garbo(){}
        ~Garbo(){
            if(m_logger != NULL){
                delete m_logger;
                m_logger = nullptr;
            }
        }
    };
    static Garbo _garbo;
};
#endif // MYLOGGER_H

QT  += core gui concurrent sql printsupport
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
CONFIG += c++11
DESTDIR = $$PWD/./bin
TARGET = log4cplus_test
LOG4CPLUSPATH = $$PWD/includes
INCLUDEPATH += -L $$LOG4CPLUSPATH \
SOURCES += \
        main.cpp \
        mainwindow.cpp \
        logger.cpp
HEADERS += \
        mainwindow.h \
        logger.h
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
LIBS += -L$$PWD/./bin -llog4cplusU