过滤器 打印请求日志

package com.lenovo.shop.filter;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.URLDecoder;
import java.util.Enumeration;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.impl.LogFactoryImpl;

import com.lenovo.platform.security.exception.AuthenticateException;
import com.lenovo.platform.security.service.SecurityManage;
import com.lenovo.platform.security.service.StaffDetails;

/**
 * 日志Filter
 *
 * @author pro
 *
 */
public class LogFilter implements Filter {
 Log log = LogFactoryImpl.getLog(LogFilter.class);

 @Override
 public void destroy() {
 }

 @Override
 public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
  try {
   HttpServletRequest request = (HttpServletRequest) servletRequest;
   StaffDetails staffDetails = null;
   try {
    staffDetails = SecurityManage.getInstance().getCurrentUser();
   } catch (AuthenticateException e) {
   }
   String requestType = request.getMethod();
   String clazz = request.getServletPath();
   String contentType = request.getContentType();
   StringBuffer params = new StringBuffer("{");
   String method = null;
   if (clazz.contains(".do")) {
    clazz = clazz.substring(1).substring(0, 1).toUpperCase() + clazz.substring(2);
    clazz = clazz.substring(0, clazz.lastIndexOf(".")) + "Action.java";
   }
   if ("POST".equals(requestType)) {
    if (contentType.contains("multipart/form-data")) {
     params.append("此请求的请求类型是multipart/form-data");
    }else if((request.getRequestURI().contains("/androidClient.do")) && ("actions=saveGoods".equals(request.getQueryString()) || "actions=updatGoods".equals(request.getQueryString()))){
     params.append("android接口");
    }else {
     ServletInputStream inputStream = request.getInputStream();
     ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
     byte[] b = new byte[1024];
     int len = 0;
     while ((len = inputStream.read(b)) != -1) {
      byteArrayOutputStream.write(b, 0, len);
     }
     byteArrayOutputStream.close();
     inputStream.close();
     if (byteArrayOutputStream.size() != 0) {
      String p = byteArrayOutputStream.toString();
      String[] ps = p.split("&");
      for (String item : ps) {
       if (!item.contains("actions")) {
        params.append("(").append(URLDecoder.decode(item, "UTF-8")).append(")").append("||");
       } else {
        method = item;
       }
      }
     }
    }
   }
   for (Enumeration<String> e = request.getParameterNames(); e.hasMoreElements();) {
    String key = e.nextElement();
    String val = request.getParameter(key);//new String(request.getParameter(key).getBytes("ISO-8859-1"), "utf-8");
    if (!"actions".equals(key)) {
     params.append("(" + key + "：" + val + ")||");
    } else {
     method = val;
    }
   }
   String ip = request.getRemoteAddr();
   String agent = request.getHeader("User-Agent");
   int len = params.length();
   if (params.length() != 1)
    params = params.delete(len - 2, len);
   params.append("}");
   System.err.println("操作用户名：" + staffDetails.getEmployeeName() + ";url:" + request.getRequestURI() + ";请求类型：" + requestType + ";请求类:" + clazz + ";请求方法:" + method + ";其他参数：" + params.toString()+" 客户端信息:{客户端IP:"+ip+";详细信息:"+agent+"}");
   log.info("操作用户名：" + staffDetails.getEmployeeName() + ";url:" + request.getRequestURI() + ";请求类型：" + requestType + ";请求类:" + clazz + ";请求方法:" + method + ";其他参数：" + params.toString() + " 客户端信息:{客户端IP:"+ip+";详细信息:"+agent+"}");
  } catch (Exception e) {

  } finally {
   filterChain.doFilter(servletRequest, servletResponse);
  }

 }

 @Override
 public void init(FilterConfig filterConfig) throws ServletException {

 }

}