SendDataServlet.java

package com.itheima.web.servlet;

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 SendDataServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//		1.获得请求方式：GET、POST
		String method = request.getMethod();
		System.out.println("1.请求方式：" + method);
//		2.获得请求参数
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		System.out.println("2.请求参数：" + username);
		System.out.println("2.请求参数：" + password);
		
//		3.响应数据 JSON
		//3.1 手动编写
//		String jsonData = "{'message':'成功了'}";  //畸形json格式
		String jsonData = "{\"message\":\"成功了\"}";
		
		//3.2 响应的中文乱码
//		response.setContentType("text/html;charset=UTF-8");  //html数据，不标准
		response.setContentType("application/json;charset=UTF-8");
		
		//3.3 发送数据
		response.getWriter().print(jsonData);
		
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		this.doGet(request, response);
	}

}