//启动类添加注解
@ServletComponentScan

package com.baiwang.invoice.utils;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.annotation.WebFilter;

import javax.servlet.http.HttpServletRequest;

/**

 * Created by ChengLuchao on 2017/8/1.

 */
// 过滤器添加注解

@WebFilter(filterName="myFilter",urlPatterns="/*")

public class KeyWordFilter implements Filter {

//    private FilterConfig filterConfig;

    public static HashMap keyMap = null;

    public static String path;

    @Override

    public void init(FilterConfig filterConfig) throws ServletException {

        System.out.println("-----------------------------------------启动");

//        this.filterConfig = filterConfig;

//        String keyWordPath = filterConfig.getInitParameter("key");

        path = filterConfig.getServletContext().getRealPath("keyword.properties");

        System.out.println(path);

    }

    @Override

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        System.out.println("----------------------------------------执行");

        HttpServletRequest req = (HttpServletRequest) request;

//        if (keyMap == null) {

//            keyMap = (HashMap) PropertiesUtil.readProperties(path);

//        }

        keyMap = new HashMap();

        keyMap.put("ccc","clclclclclcl");

        if (req.getMethod().equals("POST")) {

            chain.doFilter(new KeyWordRequestWrapper(req, keyMap), response);

            Map map =  request.getParameterMap();

            for (Object key: map.keySet()) {

                if (keyMap.get(key) != null) {

                    map.put(keyMap.get(key),map.get(key));

                    map.remove(key);

                }

            }

            request.setAttribute("map",map);

        } else {

            chain.doFilter(request, response);

        }

    }

    @Override

    public void destroy() {

       // this.filterConfig = null;

        System.out.println("----------------------------------------销毁");

    }

}