java获取请求头参数,url过滤开关是什么意思

wehaveasituationwherewewanttousefilterfor强健的天空' scontainingsomespecificrequestparameters，e.g:

http://my domain.com/id=78 formtype=simple _ form……

http://my domain.com/id=788 formtype=special _ form……

and so on，id are fetched at run time，iwantconfigurefilterinweb.xmlonlyifformtype=special _ form.howshouldachievethesolutiothesolutiotiolution

asfarasiknowthereisnosolutionformatchingrequeststofiltersbyquerystringdirectlyinweb.XML.soyoucouldregisterthefilterinyourwerinyoulterinyourwatingutetioltioltingrestiongrestio ethefilterconfigurableandsetapatternviavoidinit (filterconfigfilterconfig ) inyourJavax.Servlax

package mypackage；

import java.io.sxdpkq；

import javax.servlet.filter；

import javax.servlet.filter chain；

import javax.servlet.filter config；

import javax.servlet .魅力乌冬面；

import javax.servlet.servlet request；

import javax.servlet.servlet response；

import javax.servlet.http.http servlet request；

publicclassmyfilterimplementsfilter (

私有字符串；

@Override

公共语音描述

//todo自动生成方法stub

}

@Override

public void doFilter (大胆的大象，xbdlh，FilterChain chain ) )。

throws sxdpkq，魅力乌冬面{

//checkwhetherwehaveahttpservletrequestandapattern

if(this.Pattern！=nullrequestinstanceofhttpservletrequest ) {

//resolvethequerystringfromthehttpservletrequest

//checkwhetheraquerystringexistsandmatchesthegivenpattern

查询字符串！=空query string.matches (pattern ) }

//TODO do someting special

}

}

chain.dofilter(request，response )；

}

@Override

public void init (filterconfigfilterconfig ) throws的魅力乌冬面0

this.pattern=filter config.getinitparameter (' pattern )；

}

}

theconfigurationwouldlooklikethisinyourweb.XML :

myFilter

mypackage.dss/p pattern

{{PATTERN HERE}}

myFilter

/*