非WEB环境使用 log4j

import java.io.FileNotFoundException;import java.io.IOException;import java.net.URL;import org.apache.commons.collections4.list.TreeList;import org.apache.log4j.Logger;import org.apache.log4j.PropertyConfigurator;public class Main {    /**     * 非WEB环境使用 log4j     *      * @throws FileNotFoundException     * @throws IOException     */    public static void logConfig() {        URL url = ClassLoader.getSystemResource("log4j.properties");//必须在类路径下        PropertyConfigurator.configure(url);    }    public static void main(String[] args) {        Logger log = Logger.getLogger(Main.class);        log.info("info");        TreeList<?> list;    }}