package com.tocken.listener;

import java.util.Map;

import javax.faces.context.ExternalContext;

import javax.faces.context.FacesContext;

import javax.faces.event.PhaseEvent;

import javax.faces.event.PhaseId;

import javax.faces.event.PhaseListener;

import javax.servlet.http.HttpSession;

public class TockenPhaseListener implements PhaseListener {

/**

*

*/

private static final long serialVersionUID = 1L;

@Override

public void afterPhase(PhaseEvent pe) {

if(pe.getPhaseId()==PhaseId.INVOKE_APPLICATION ){

System.out.println("action逻辑处理之后要做的事");

FacesContext facesContext = pe.getFacesContext();

ExternalContext context =facesContext.getExternalContext();

HttpSession session = (HttpSession) context.getSession(true);

Map map = context.getRequestParameterMap();

String tockenName=map.get("tockenName").toString();

session.removeAttribute(tockenName);

}

}

@Override

public void beforePhase(PhaseEvent pe) {

if(pe.getPhaseId()==PhaseId.APPLY_REQUEST_VALUES ){

System.out.println("action逻辑处理之前要做的事");

//把session里的值取出来比较

FacesContext facesContext = pe.getFacesContext();

ExternalContext context =facesContext.getExternalContext();

HttpSession session = (HttpSession) context.getSession(true);

Map map = context.getRequestParameterMap();

String tockenName=map.get("tockenName").toString();

String tockenValue= map.get("tockenValue").toString();

if(session.getAttribute(tockenName)==null){

session.setAttribute(tockenName, tockenValue);

}

else{

String tockenVar = session.getAttribute(tockenName).toString();

if(tockenValue.equals(tockenVar)){

System.out.println("你被拦截了");

facesContext.renderResponse();

}

}

}

}

@Override

public PhaseId getPhaseId() {

return PhaseId.ANY_PHASE;

}

}

写的通过PhaseListener 的重复提交拦截器，可惜效果不好，当作纪念吧