Log4j静态记录器

时间:2013-12-04 20:37:56

标签: java logging properties log4j

我尝试使用log4j创建一个静态记录器。使用PropertyConfigurator.configureAndWatch(LOG4J_CONFIG_FILE);读取属性文件时没有出错,但是如果我想用例如debug登录

case DEBUG:
     System.out.println("debug");
     log.debug(message);
     break;

没有任何事情发生。我创建了一个system.out.println来查明是否到达了代码,println被打印出来了。有人可以给我一个提示,为什么记录器不起作用?

这是完整的代码。

import org.apache.log4j.Appender;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Layout;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.spi.ErrorHandler;
import org.apache.log4j.spi.Filter;
import org.apache.log4j.spi.LoggingEvent;

public class Logging {

    private static final String LOG4J_CONFIG_FILE = "/config/log4j.properties";
    private static Logging instance;
    private Logger log;

    public enum level {
        DEBUG, INFO, WARN, ERROR, FATAL
    };

    /**
     * Private Constructor for Logging.
     */
    private Logging() {
        PropertyConfigurator.configureAndWatch(LOG4J_CONFIG_FILE);
    }

    /**
     * Returns an instance of the Logger.
     */
    public static synchronized Logging getInstance() {

        if (instance == null)
            instance = new Logging(Logger.getLogger(Logging.class));
        return instance;
    }

    /**
     * Method for doing the logging of actions in the system.
     *
     * @param l The preciseness level of the logging.
     * @param message The message to print.
     */
    public void log(Logging.level l, String message) {
        switch (l) {
        case WARN:
            log.warn(message);
            break;
        case ERROR:
            log.error(message);
            break;
        case DEBUG:
            System.out.println("debug");
            log.debug(message);
            break;
        case FATAL:
            log.fatal(message);
            break;
        default:// INFO
            log.info(message);
            break;
        }
    }

    public Logging(Logger logger) {
        this();
        setLogger(logger);
    }

    private void setLogger(Logger log) {
        this.log = log;
    }
} 

Hier是log4j.properties

# Root logger option
log4j.rootLogger=INFO, file

# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C://loging.log
log4j.appender.file.MaxFileSize=1MB
log4j.appender.file.MaxBackupIndex=1
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

1 个答案:

答案 0 :(得分:0)

根据我的评论,您的DEBUG消息未显示的原因是配置错误。

要使其正常工作,请将第一行更改为以下内容:

log4j.rootLogger=DEBUG, file

这将使所有级别大于或等于DEBUG的邮件能够输出到您的文件中。

您可以在以下手册中阅读所有相关信息:http://logging.apache.org/log4j/1.2/manual.html