<%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>



  
  
  
  


请输入两个字符串

  

    first:
    second:
　　　　　//点击按钮的时候触发属性
    button //提交 按钮
  
  
  // 用来 显示 result

package com.java.servlet;
import java.io.IOException;
import java.io.PrintWriter;
/**
 * Ajax 训练
 * */
public class UserServlet extends javax.servlet.http.HttpServlet {
  protected void doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException {
    this.doGet(request,response);
  } 
  protected void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    request.setCharacterEncoding("utf-8");
    response.setCharacterEncoding("UTF-8");
    PrintWriter out = response.getWriter(); 
    String first = request.getParameter("first");      //从前端获取数据first
    String second = request.getParameter("second");     //从前端获取数据second
    String result=first+second;
    System.out.println(result);                   //用于测试 ，判断是否成功获取到数据；
    out.println(result);                         //将数据传到前端
  }
}