1、servlet内代码

package lianxi;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class jiafa extends HttpServlet {	private static final long serialVersionUID = 1L;              public jiafa() {        super();            }		protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {		response.setContentType("text/html");		response.setCharacterEncoding("UTF-8");		String num1=request.getParameter("shu1");		String num2=request.getParameter("shu2");		int a=Integer.parseInt(num1);		int b=Integer.parseInt(num2);		int sum=a+b;		response.getWriter().write("两个数之和："+sum);		int cheng=a*b;		response.getWriter().write("
两个数之积："+cheng);		int cha=a-b;		response.getWriter().write("
两个数之差："+cha);	}		protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {				doGet(request, response);	}}

 2、jsp内代码

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>
     
     
      请输入第一个数字：
      
      
请输入第二个数字：
      
      
      
     

 3、运算结果