利用日志和过滤器生成用户访问日志

2008-02-23 10:15:36来源：互联网阅读 ()

用log4j来生成日志。然后将日志类加入到过滤器中。使得当用户访问时JSP或者Servlet时可以生成日志。便于调试。
下面是用log4j来的得到用户访问的地址并写道文件中。
package xzt.rs.tools;
import xzt.rs.tools.Cundate;
import Java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*; // For Date class
import org.apache.log4j.*;
/** Simple filter that prints a report in the log file
* whenever the associated servlets or JSP pages
* are Accessed.
*/

public class LogFilter implements Filter {
protected FilterConfig config;
private ServletContext context;
private String filterName;
private Cundate cd=new Cundate();
//
static Logger logger = Logger.getLogger(LogFilter.class.getName());
//
public void doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
throws ServletException, IOException {
HttpServletRequest req = (HttpServletRequest)request;

chain.doFilter(request,response);
//
PropertyConfigurator.configure("Log4j.properties");

LogFilter.logger.info(req.getRemoteHost()
"试图访问"
req.getRequestURL()
"在" cd.getTime4() ". "
"(被报告:" filterName ".)");

//
}

public void init(FilterConfig config)
throws ServletException {
this.config = config; // In case it is needed by subclass.
context = config.getServletContext();
filterName = config.getFilterName();
}

public void destroy() {}

}
//

得到当前日期的简单类。
package xzt.rs.tools.*;

public class Cundate{

public String getTime4(){

Date d = new Date(); //Get current date to d.
SimpleDateFormat fm = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss"); //Set date format
String strDate = fm.format(d); //Get date to string strDate via format fm.
return strDate;
}

}
在Web.XML中配置过滤器，使得用户访问jsp或者servlet时把访问的文件、时间、用户写道日志中。

<filter>
<filter-name>Logger</filter-name>
<filter-class>
xzt.rs.tools.LogFilter
</filter-class>
</filter>

<filter-mapping>
<filter-name>Logger</filter-name>
<url-pattern>/*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>Logger</filter-name>
<url-pattern>/servlet/*</url-pattern>
</filter-mapping>


生成的文件内容

INFO [tcpConnection-8080-3] (LogFilter.java:31) - newtransit试图访问http://192.168.0.3:8080/oasystem/main.jsp在2005-01-21-16-40-31. (被报告:Logger.)

Log4j.properties的配置文件
log4j.rootLogger=debug, A1