tomcat的acess_log打印post请求参数,分析日志

有的时候服务器端接口允许请求的方式多样化且不过定，没有nginx的内网服务还需要统计分析post请求日志

1) 在项目中加入相应的包和类，加载那里无所谓，只要web.xml配置正确即可

package filters; 

import  java.io.IOException; 
import java.util.Enumeration; 

import javax.servlet.*; 

public final class PostDataDumperFilter implements Filter { 

private  FilterConfig filterConfig = null; 

public void destroy() { 
this.filterConfig = null; 
} 

public void doFilter( ServletRequest request,  ServletResponse response, FilterChain chain) throws  IOException,  ServletException { 
if (filterConfig == null) 
return; 

Enumeration names = request.getParameterNames(); 
StringBuffer output=new  StringBuffer(); 
while (names.hasMoreElements()) { 
String name = (String) names.nextElement(); 
output.append(name+"="); 
String values[] = request.getParameterValues(name); 
for (int i = 0; i < values.length; i++) { 
if (i > 0) output.append("' "); 
output.append(values[i]); 
} 
if(names.hasMoreElements()) output.append("&"); 
} 
request.setAttribute("post", output); 
chain.doFilter(request, response); 
} 

public void init( FilterConfig filterConfig) throws  ServletException { 
this.filterConfig = filterConfig; 
} 
} 

2) 配置web.xm，一般在路径 main/webapps/WEB-INF/web.xml: 
 
post-data-dumper-filter 
filters.PostDataDumperFilter 
 
 
post-data-dumper-filter 
/* 
 

3) now you have the attribute postdata for each request and you can easily log it in access valve, for example: 

                prefix="localhost_access_log." suffix=".txt" 
                pattern='%h %p %H %l %u %t "%r" params={%{post}r} %s %bbytes %Dms' resolveHosts="false"/>