摘要：package com.cn21.yao.service;import org.apache.log4j.Logger;public class UserService { //方法一： //public static final Logger logger = Logger.getLo... 阅读全文

摘要：package test.log4j;import org.apache.log4j.Logger;publicclass HelloLog4j { privatestaticfinal Logger logger = Logger.getLogger(HelloLog4j.class); ... 阅读全文