qt下添加dcmtk日志的一种方法

1.首先定义一个日志类

#ifndef GUIAPPENDER_H
#define GUIAPPENDER_H

#include "dcmtk/oflog/config.h"
#include "dcmtk/oflog/appender.h"
#include "dcmtk/oflog/helpers/property.h"
#include <sstream>
namespace log4cplus
{
    class GuiAppender : public dcmtk::log4cplus::Appender
    {

    public:
        GuiAppender();
        GuiAppender(const dcmtk::log4cplus::helpers::Properties& properties, dcmtk::log4cplus::tstring& error);
        virtual ~GuiAppender();

        // Methods
        virtual void close();

    protected:
        virtual void append(const dcmtk::log4cplus::spi::InternalLoggingEvent& event);
        //声明一个ostringsteam对象
        STD_NAMESPACE ostringstream outString ;
    private:
        // Disallow copying of instances of this class
        GuiAppender(const GuiAppender&);
        GuiAppender& operator=(const GuiAppender&);

    };
} // end namespace log4cplus
#endif // GUIAPPENDER_H

#include "GuiAppender.h"
#include <string>
#include <QDebug>
#include <QString>
log4cplus::GuiAppender::GuiAppender()
{

}
log4cplus::GuiAppender::GuiAppender(const dcmtk::log4cplus::helpers::Properties& properties, dcmtk::log4cplus::tstring&)
: Appender(properties)
{

}

log4cplus::GuiAppender::~GuiAppender()
{

}
void log4cplus::GuiAppender::close()
{
}

// This method does not need to be locked since it is called by
// doAppend() which performs the locking
void log4cplus::GuiAppender::append(const dcmtk::log4cplus::spi::InternalLoggingEvent& event)
{
    //格式化输入DCMTK日志
    layout->formatAndAppend(outString, event);
    //获取DCMTK日志字符串流
    STD_NAMESPACE string m = outString.str();
    //将C++标准字符串流，转换成QString
    QString t = QString::fromStdString(m);
    //输出调试信息
    qDebug() << t;
    //清空
    outString.str("");
}

 2.在入口文件处添加

OFLog::configure(OFLogger::DEBUG_LOG_LEVEL);
    OFLOG_DEBUG(echoscuLogger, "OFLOG_DEBUG");
    OFauto_ptr<dcmtk::log4cplus::Layout> layout(new dcmtk::log4cplus::PatternLayout("%D{%Y-%m-%d %H:%M:%S.%q} %5p: %m%n"));
    //建立Gui日志输出类
    dcmtk::log4cplus::SharedAppenderPtr guiAppender(new log4cplus::GuiAppender());
    guiAppender->setLayout(layout);
    //获取全局日志对象
    dcmtk::log4cplus::Logger log = dcmtk::log4cplus::Logger::getRoot();
    //去除所有日志输出类
    log.removeAllAppenders();
    //加入Gui输出类
    log.addAppender(guiAppender);
    //设置日志输出层
    log.setLogLevel(OFLogger::DEBUG_LOG_LEVEL);
    //测试输出一个error日志
    OFLOG_ERROR(log, "There are six log levels and each provides a OFLOG_level() macro");