不能通過簡(jiǎn)單的配置log4j配置文件來實(shí)現(xiàn)，而需要在代碼中調(diào)用Log4j的類來實(shí)現(xiàn)。下面給出實(shí)現(xiàn)類：

 /** * @author QG * * 2010-7-22 上午10:27:50 LoggerRun.java */

public class LoggerRun { //設(shè)定兩個(gè)Log 

      public static Logger infoLogger = Logger.getLogger("info.logger");

      public static Logger errorLogger = Logger.getLogger("error.logger");

      public static final String PROFILE = "log4j.properties";

     //設(shè)定異常log輸出的路徑

       private static final String PATH = Constants.PATH;

          static{

                  try{

                      URL configFileResource = (new File(LoggerRun.class.getResource("/").getPath()+PROFILE)).toURL();          

                      PropertyConfigurator.configure(configFileResource); 

                }catch(Exception e){

                     e.printStackTrace(); 

           }

         } 

      public LoggerRun(){

             try {

                         Date date = new Date();

                        SimpleDateFormat sf = new SimpleDateFormat("yyyyMMddHHmmss"); 

                        String fileName = PATH + "exception_" + sf.format(date).toString() + ".log";

                            FileAppender exceptionAppender = new FileAppender(new SimpleLayout(), fileName);       

                         errorLogger.addAppender(exceptionAppender);

                      } catch (Exception e) {

                              e.printStackTrace();

                     }

                   }

         }

同時(shí)給出配置文件配置信息：

log4j.category.info.logger=INFO, info,stdout

log4j.category.error.logger=ERROR,error 

log4j.appender.stdout=org.apache.log4j.ConsoleAppender 

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout 

log4j.appender.stdout.layout.ConversionPattern=%d{yyyy/MM/dd HH:mm:ss.SSS} %-5p %m%nlog4j.appender.info=org.apache.log4j.RollingFileAppender

log4j.appender.info.File=bin/log/info.log

log4j.appender.info.MaxFileSize=100kb

log4j.appender.info.MaxBackupIndex=4

log4j.appender.info.layout=org.apache.log4j.PatternLayout

log4j.appender.info.layout.ConversionPattern=%d{yyyy/MM/dd HH:mm:ss.SSS} %-5p %m%nlog4j.appender.error=org.apache.log4j.RollingFileAppender

log4j.appender.error.File=bin/log/error.log

log4j.appender.error.MaxFileSize=100kb

log4j.appender.error.MaxBackupIndex=4

log4j.appender.error.layout=org.apache.log4j.PatternLayout

log4j.appender.error.layout.ConversionPattern=%d{yyyy/MM/dd HH:mm:ss.SSS} %-5p %m%n

在給出測(cè)試類：

public class TestLog {

                      public static final Logger logger=Logger.getLogger(TestLog.class);

              /** * @param args */

              public static void main(String[] args) {

                      // TODO Auto-generated method stub

                            for(int i=0;i<10;i++){

                                             if(i<5){

                                                      LoggerRun.infoLogger.info("TEST The Logger DUBUG!!!!");

                                             }else{

                                                     LoggerRun.errorLogger.error("TEST THe LOGGER ERROR!!!!!!");

                                             }

                            }

                  }

              } 

同一個(gè)類中的日志按類型輸出到了不同的日志文件中。希望對(duì)大家能有所幫助。