package com.hopetesting.web.filter;import javax.servlet.*;import javax.servlet.annotation.WebFilter;import java.io.BufferedReader;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import java.lang.reflect.InvocationHandler;import java.lang.reflect.Method;import java.lang.reflect.Proxy;import java.util.ArrayList;import java.util.List;/** * @author newcityman * @date 2019/9/13 - 19:41 */@WebFilter("/*")public class SensitiveWordsFilter implements Filter {public void destroy() { }public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {//1、创建代理对象，增强getParameter方法 ServletRequest proxy_req = (ServletRequest) Proxy.newProxyInstance(req.getClass().getClassLoader(), req.getClass().getInterfaces(), new InvocationHandler() {@Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {//判断是否是getParameter方法 //如果是，增强getParameter方法 if (method.getName().equals("getParameter")) {//增强返回值 //获取返回值 String value = (String) method.invoke(req, args); if (value != null) {for (String str : list) {if (value.contains(str)) { value = value.replace(str, "******"); } } }return value; }return method.invoke(req, args); } }); chain.doFilter(proxy_req, resp); }private List<String> list = new ArrayList<String>(); //敏感词汇集合 public void init(FilterConfig config) throws ServletException {try {//1、获取文件的真实路径 ServletContext servletContext = config.getServletContext(); String realPath = servletContext.getRealPath("/WEB-INF/classes/敏感词汇.txt"); //2、读取文件 BufferedReader br = new BufferedReader(new FileReader(realPath)); //3、将文件的每一行读取到list中 String line = null; while ((line = br.readLine()) != null) {list.add(line); } br.close(); System.out.println(list); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }}
转载于:https://www.cnblogs.com/newcityboy/p/11517618.html
