log4j的使用 【给我发表点意见】

1），将log4j.properties放在src下具体内容是
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#控制台
log4j.rootCategory=INFO,A1,A2

log4j.appender.A1=org.apache.log4j.ConsoleAppender

log4j.appender.A1.layout=org.apache.log4j.PatternLayout

log4j.appender.A1.layout.ConversionPattern=%4p [%t] (%F:%L) - %m%n

#输出到d盘文件
log4j.appender.A2=org.apache.log4j.RollingFileAppender

log4j.appender.A2.File=d://Sample.log

log4j.appender.A2.MaxFileSize = 1KB

log4j.appender.A2.MaxBackupIndex = 3

log4j.appender.A2.layout=org.apache.log4j.PatternLayout

log4j.appender.A2.layout.ConversionPattern=%d{yyyy-MM-dd hh:mm:ss}:%p %t %c - %m%n

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2），在web.xml中配置如下
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<!-- log4j配置 -->
<servlet>
<servlet-name>Log4j</servlet-name>
<servlet-class>
com.casw.pioagis.web.servlet.Log4j
</servlet-class>
<init-param>
<param-name>Log4j-init-file</param-name>
<param-value>WEB-INF\classes\log4j.properties</param-value>
</init-param>
<load-on-startup>9</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Log4j</servlet-name>
<url-pattern>/Log4j</url-pattern>
</servlet-mapping>
<!-- 结束 -->
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3），建立一个servlet (log4j.java)内容如下
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import javax.servlet.*;

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
/**
* 系统初始化时初始化Log4j配置
* @author burntwater
*
*/
public class Log4j extends javax.servlet.http.HttpServlet {

private static final long serialVersionUID = -5863356406564058679L;


protected String configfile = "log4j.properties";

public void init() throws ServletException {
ServletContext sct = getServletContext();
String file = getInitParameter("Log4j-init-file");
PropertyConfigurator.configure(sct.getRealPath("/") + file);
}

public void service(javax.servlet.http.HttpServletRequest req,
javax.servlet.http.HttpServletResponse res) {
Logger log = Logger.getLogger(Log4j.class);

}
}
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4），使用
//日志操作，提供子类使用
protected Logger logger =Logger.getLogger(getClass());

logger.debug();
logger.info();
logger.warn();
logger.error();