AJAX学习笔记（五、AJAX

SubmitServlet:

package edu.hpu.servlet;

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;

import edu.hpu.Pojo.Role;

import net.sf.json.JSONObject;

/**

• Servlet implementation class SubmitServlet

*/

public class SubmitServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

public SubmitServlet() {

super();

}

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

doPost(request, response);

}

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

String data=request.getParameter(“data”); //获取前端传递数据

System.out.println(“服务端接收到的数据是：” +data);

JSONObject json=JSONObject.fromObject(data);

System.out.println(“转换为JSON对象之后是：”+ json);

Role role = (Role)JSONObject.toBean(json,Role.class);

System.out.println(“转换为Hero对象之后是：”+role);

}

}

web.xml配置：

SubmitServlet

edu.hpu.servlet.SubmitServlet

SubmitServlet

/submitServlet

跑一下，结果：

[](()前端获取一个对象

GetOneServlet:

package edu.hpu.servlet;

import edu.hpu.pojo.Role;

import net.sf.json.JSONObject;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

public class GetOneServlet extends HttpServlet {

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

Role role=new Role();

role.setName(“柳飘飘”);

role.setFilm(“喜剧之王”);

JSONObject json= new JSONObject();

json.put(“role”, JSONObject.fromObject(role));

response.setContentType(“text/html;charset=utf-8”);

response.getWriter().print(json);

}

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

}

}

web.xml配置：

GetOneServlet

edu.hpu.servlet.GetOneServlet

GetOneServlet

/getOneServlet

getOne.html:

影视角色：

跑一下，结果：

F12可以进入调试模式，查看前端发出的异步请求以及后端的响应：

[](()前端获取多个对象

GetManyServlet:

package edu.hpu.servlet;

import edu.hpu.pojo.Role;

import net.sf.json.JSONSerializer;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;