1.使用log4j提供的方法自定义类并引入到spring中.

    <!--配置log4j自动加载日志-->       <bean class="com.roy.util.Log4jConfig">           <constructor-arg name="reload" value="true"/>           <constructor-arg name="interval" value="20000"/>       </bean>  

2.代码如下:

    package com.roy.util;         import org.apache.log4j.PropertyConfigurator;       import org.slf4j.Logger;       import org.slf4j.LoggerFactory;              public class Log4jConfig {           private boolean reload = true;           private int interval = 10000;           private static final Logger logger = LoggerFactory.getLogger(Log4jConfig.class);                  /**          * log4j日志自动加载          *          * reload   是否开启自动加载          * interval 自动加载时间(ms)          */           public Log4jConfig(boolean reload, int interval) {               this.reload = reload;               this.interval = interval;               this.loadConfig();           }                  public void loadConfig() {               String log4jPath = Log4jConfig.class.getClassLoader().getResource("log4j.properties").getPath();               logger.debug("log4j file path: " + log4jPath);                      // 间隔特定时间，检测文件是否修改，自动重新读取配置               PropertyConfigurator.configureAndWatch(log4jPath, this.interval);           }       }