入门servlet：request获取请求体数据

 @WebServlet("/RequestDemo5")
 public class RequestDemo5 extends HttpServlet {
     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         //获取请求消息体--请求参数

         //1.获取字符流
         BufferedReader br = request.getReader();
         //2.读取数据
         String line = null;
         while((line = br.readLine()) != null){
             System.out.println(line);
         }
     }

     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

     }
 }