日志系统的使用

编译指令：g++ log4cppTest.cc -llog4cpp -lpthread

自定义布局

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#include <log4cpp/OstreamAppender.hh>//输出到文件
#include <log4cpp/PatternLayout.hh>
#include <log4cpp/Category.hh>
#include <log4cpp/Priority.hh>
#include <fstream>
using namespace std;
using namespace log4cpp;

void test(){
    //设置布局
    PatternLayout *ptn1 = new PatternLayout();
    pth1->setConversionPattern("%d %c [%p] %m%n");
    
    PatternLayout *ptn2 = new PatternLayout();
    pth2->setConversionPattern("%d %c [%p] %m%n");
    
    
    //创建目的地对象
    ofstream ofs("res.txt")
    
    //OstreamAppender *pos = new OstreamAppender("console",&cout);
        OstreamAppender *pos = new OstreamAppender("console",&ofs);//也可以保存日志信息到文件
    pos->setLayout(ptn1);
    
    FileAppender *pfile = new FileAppender("file","wd.log");//第三个参数默认是ture表示以追加的方式写入文件
    pfile->setLayout(ptn2);
    
    //创建记录器
    Category &sales = Category:getRoot().getInstance("salesDepart");
    sales.setPriority(Priority::ERROR);
    sales.addAppender(pos);
    sales.addAppender(pfile);
    
    
    //记录日志
    sales.emerg("this is an emerg");
    sales.fatal("this is an fatal");
    sales.alert("this is an alert");
    sales.crit("this is an crit");
    sales.error("this is an error");
    sales.warn("this is an warn");
    sales.notice("this is an notice");
    sales.info("this is an info");
    sales.debug("this is an debug");
    
    //日志系统退出时回收资源
    Category::shutdown();
}


使用回卷文件

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#include <log4cpp/OstreamAppender.hh>//输出到文件
#include <log4cpp/PatternLayout.hh>
#include <log4cpp/Category.hh>
#include <log4cpp/Priority.hh>
//在这里加了一行
#include <log4cpp/RollingFileAppender.h>
using namespace std;
using namespace log4cpp;

void test(){
    //设置布局
    PatternLayout *ptn1 = new PatternLayout();
    pth1->setConversionPattern("%d %c [%p] %m%n");
    
    PatternLayout *ptn2 = new PatternLayout();
    pth2->setConversionPattern("%d %c [%p] %m%n");
    
    PatternLayout *ptn3 = new PatternLayout();
    pth2->setConversionPattern("%d %c [%p] %m%n");
    
    
    //创建目的地对象
    ofstream ofs("res.txt")
    
    //OstreamAppender *pos = new OstreamAppender("console",&cout);
        OstreamAppender *pos = new OstreamAppender("console",&ofs);//也可以保存日志信息到文件
    pos->setLayout(ptn1);
    
    FileAppender *pfile = new FileAppender("file","wd.log");//第三个参数默认是ture表示以追加的方式写入文件
    pfile->setLayout(ptn2);
   	
    
    
    //创建回卷文件目的地
    RollingFileAppender * roll = new RollingFileAppender("rollingFile","rollingwd.log"，5*1024，9);//第一个参数随便写,第二个参数是文件名，第三个参数是每个文件的大小，第四个参数是备份的个数
     roll->setLayout(ptn3);
    
    //创建记录器
    Category &sales = Category:getRoot().getInstance("salesDepart");
    sales.setPriority(Priority::ERROR);
    sales.addAppender(pos);
    sales.addAppender(pfile);
    sales.addAppender(roll);
    
    
    //记录日志
    sales.emerg("this is an emerg");
    sales.fatal("this is an fatal");
    sales.alert("this is an alert");
    sales.crit("this is an crit");
    sales.error("this is an error");
    sales.warn("this is an warn");
    sales.notice("this is an notice");
    sales.info("this is an info");
    sales.debug("this is an debug");
    
    //日志系统退出时回收资源
    Category::shutdown();
}