Log4j工具类

Java非web项目log4j的配置

1、Log4jConfig类：是用于配置log4j.properties的位置的。

package com.util;

import org.apache.log4j.PropertyConfigurator;

public class Log4jConfig {  
    private static boolean isReload = true; 
    public static void load() {  
        String path = Log4jConfig.class.getClass().getResource("/")  
                .getPath()  
                + "config/log4j.properties";  
        //String path="config/log4j.properties";   
        System.out.println("log4j configfile path=" + path);  
        PropertyConfigurator.configureAndWatch(path,1000);    
    }  
   
    private static void reload() {  
        if (isReload) {  
            load();  
        }  
        isReload = false;  
    }  
   
    public void setReload(boolean flag) {  
        isReload = flag;  
    }  
   
}

2、 Logger类，用于写日志的。

package com.util;


import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
 
public class Logger {  
    private Log log = null;  
    static{  
        Log4jConfig.load();//装载log4j配置文件   
    }  
    private Logger() {  
        log = LogFactory.getLog(this.getClass());  
    }  
   
    private Logger(Class c) {  
        log = LogFactory.getLog(c);  
    }  
   
    private Logger(String className) {  
        log = LogFactory.getLog(className);  
    }  
   
    public static Logger getLogger() {  
        return new Logger();  
    }  
   
    public static Logger getLogger(Class c) {  
           
        return new Logger(c);  
    }  
   
    public static Logger getLogger(String className) {  
        return new Logger(className);  
    }  
   
    public void trace(String info) {  
        if (log.isTraceEnabled())  
            log.trace(info);  
    }  
   
    public void debug(String info) {  
        if (log.isDebugEnabled())  
            log.debug(info);  
    }  
   
    public void info(String info) {  
        if (log.isInfoEnabled())  
            log.info(info);          
    }  
   
    public void warn(String info) {  
        if (log.isWarnEnabled())  
            log.warn(info);  
    }  
   
    public void error(String info) {  
        if (log.isErrorEnabled())  
            log.error(info);  
    }  
   
    public void fatal(String info) {  
        if (log.isFatalEnabled())  
            log.fatal(info);  
    }  
   
    public boolean isTraceEnabled() {  
        return log.isTraceEnabled();  
    }  
   
    public boolean isDebugEnabled() {  
        return log.isDebugEnabled();  
    }  
   
    public boolean isInfoEnabled() {  
        return log.isInfoEnabled();  
    }  
   
    public boolean isWarnEnabled() {  
        return log.isWarnEnabled();  
    }  
   
    public boolean isErrorEnabled() {  
        return log.isErrorEnabled();  
    }  
   
    public boolean isFatalEnabled() {  
        return log.isFatalEnabled();  
    }  
} 

3、配置文件

log4j.rootLogger=info, Console, RollingFile

#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n

#RollingFile
log4j.appender.RollingFile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.RollingFile.File=logs/price.log
log4j.appender.RollingFile.layout=org.apache.log4j.PatternLayout
log4j.appender.RollingFile.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n

#Project defalult level
log4j.logger.org.springside.examples.miniweb=INFO

#Forbidden struts2 ClassFinder message 
log4j.logger.com.opensymphony.xwork2.util.finder.ClassFinder=OFF

4、测试

package testLog;
 
public class TestLog {
 
    static Logger log=Logger.getLogger(TestLog.class);  
     
    public static void main(String[] args) {  
        for (int i = 0; i < 5; i++) {  
            log.info("----------info");  
            log.debug("----------debug");  
            log.error("----------error");
               
            System.out.println("***********************");  
            try {  
                Thread.sleep(2000);  
            } catch (InterruptedException e) {  
                // TODO Auto-generated catch block   
                e.printStackTrace();  
            }  
        }  
   
    }  
}