老师请检查,不知道为什么404,路径检查了没有问题
index.html
1 2 3 4 5 6 7 8 9 10 11 12 13 | <!DOCTYPE html> < html > < head > < meta charset = "UTF-8" > < title >add-test</ title > </ head > < body > < form action = "/requestServlet/rq" > < input type = "number" name = "num" placeholder = "请输入100以内的数字" >< input type = "submit" name = "button" value = "求累加和" > </ form > </ body > </ html > |
REQServlet.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | package com.superj.com; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Servlet implementation class RQEServlet */ @WebServlet ( "/rq" ) public class RQEServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public RQEServlet() { super (); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String input = request.getParameter( "input" ); int num = Integer.parseInt(input); int sum = 0 ; for ( int i = 0 ;i <= num;i++) { sum += i; } request.setAttribute( "sum" , sum); request.getRequestDispatcher( "/result" ).forward(request, response); } } |
resultServlet.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | package com.superj.com; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Servlet implementation class resultServlet */ @WebServlet ( "/result" ) public class resultServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public resultServlet() { super (); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding( "utf-8" ); response.setCharacterEncoding( "utf8" ); response.setContentType( "text/html;charset=utf-8" ); int sum2=( int ) request.getAttribute( "sum" ); response.getWriter().println( "累加和为:" +sum2); } } |
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