基于Javaweb的流量监控demo源码+项目说明.zip

package com.example.demo.MyFilter; import javax.servlet.*; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.*; import java.net.ConnectException; import java.net.HttpURLConnection; import java.net.URL; import java.util.Enumeration; public class RequestForwardFilter implements Filter { private String forwardIP = "127.0.0.1"; private String forwardPort = "3307"; // 设置要转发的特定IP // 建议就是自己开个127.0.0.1:3307的http服务接受请求，这样不至于太卡（不接受请求也可以，但是容易超时） @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest httpRequest = (HttpServletRequest) request; HttpServletResponse httpResponse = (HttpServletResponse) response; // 转发请求 forwardRequest(httpRequest, httpResponse); // 继续处理请求 // chain.doFilter(request, response); } private void forwardRequest(HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws IOException { // 将请求转发到特定IP和端口 try { // 将请求转发到特定IP URL url = new URL("http://" + forwardIP + ":" + forwardPort + httpRequest.getRequestURI()); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod(httpRequest.getMethod()); // 设置其他请求头信息，如Content-Type等 if (httpRequest.getMethod().equals("POST")) { // 启用输出 connection.setDoOutput(true); InputStream inputStream = httpRequest.getInputStream(); OutputStream outputStream = connection.getOutputStream(); byte[] buffer = new byte[4096]; int bytesRead; while ((bytesRead = inputStream.read(buffer)) != -1) { outputStream.write(buffer, 0, bytesRead); } outputStream.flush(); } // 获取转发请求的响应 int responseCode = connection.getResponseCode(); }catch (ConnectException e){ System.out.println(e); } } @Override public void destroy() { // 清理资源 } }