java_method_Log输出日志的方法

package cn.com.qmhd.tools;
 
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
 
public class Log {
    private static Logger logger = Logger.getLogger(Log.class.getName());
    private static Log  log = null;
    public static Log getInstance(){
        if(log == null){
            log = new Log();
        }
        return log;
    }
    Log() {
        PropertyConfigurator.configure(Log.class.getClassLoader().getResource(
                "").getFile()
                + "config/log4j.properties");
    }
 
    public void printWran(String className, String strWran) {
        logger.warn("["+className+"]"+strWran);
    }
 
    public void printInfo(String className, String strInfo) {
        logger.info("["+className+"]"+strInfo);
    }
 
    public void printError(String className,String strError) {
        logger.error("["+className+"]"+strError);
    }
 
    public void printDebug(String className, String strDebug) {
        logger.debug("["+className+"]"+strDebug);
    }
}