<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
<script src="js/jquery.min.js"></script>
<script>
//页面加载绑定单击事件
$(function () {
$("#btn").click(function () {
// alert("hello ajax");
//发送ajax请求
$.ajax({
url: "user/testAjax",
contentType: "application/json;charset=UTF-8",
data:'{"username": "zmy", "password": "123", "age": 20}' ,
dataType: "json",
type: "post",
success: function (data) {
//data服务器端响应的json的数据，进行解析
alert(data);
alert(data.username);
alert(data.password);
alert(data.age);
}
});
});
});
</script>
</head>
<body>
<a href="user/testString">testString</a><br/>
<a href="user/testVoid">testVoid</a><br/>
<a href="user/testModelAndView">testModelAndView</a><br/>
<a href="user/testForwardOrRedirect">testForwardOrRedirect</a><br/>
<button id="btn">发送ajax请求</button>
</body>
</html>
package com.hope.controller;
import com.hope.domain.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* @author newcityman
* @date 2019/11/27 - 20:38
*/
@Controller("userController")
@RequestMapping(path = {"/user"})
public class UserController {
/**
* 返回值是String
*
* @param model
* @return
*/
@RequestMapping(path = "/testString")
public String testString(Model model) {
System.out.println("testString执行成功");
User user = new User();
user.setUsername("zmy");
user.setPassword("123");
user.setAge(12);
model.addAttribute("user", user);
return "success";
}
/**
* 测试testVoid方法
*
* @param
* @return
*/
@RequestMapping(path = "/testVoid")
public void testVoid(HttpServletRequest request, HttpServletResponse response) throws Exception {
System.out.println("testString执行成功");
//请求转发
// request.getRequestDispatcher("/WEB-INF/pages/success.jsp").forward(request,response);
//重定向(重定向是不能够直接发送请求去访问WEB-INF下的页面的)
// response.sendRedirect(request.getContextPath()+"/index.jsp");
//直接流进行响应
//设置中文乱码
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
response.getWriter().print("hello 张三");
return;
}
/**
* 返回值是ModelAndView
*
* @param
* @return
*/
@RequestMapping(path = "/testModelAndView")
public ModelAndView testModelAndView() {
ModelAndView mv = new ModelAndView();
System.out.println("testString执行成功");
User user = new User();
user.setUsername("tomcat");
user.setPassword("987");
user.setAge(5);
mv.addObject("user", user);
mv.setViewName("success");
return mv;
}
/**
* 测试forward和redirect关键字
*
* @param
* @return
*/
@RequestMapping(path = "/testForwardOrRedirect")
public String testForwardOrRedirect() {
System.out.println("testForwardOrRedirect执行成功");
//请求转发
// return "forward:/WEB-INF/pages/success.jsp";
//重定向
return "redirect:/index.jsp";
}
/**
* 模拟异步请求响应
*/
@RequestMapping(path = "/testAjax")
public @ResponseBody User testAjax(@RequestBody User user) {
System.out.println("testAjax执行成功");
//客户端发送ajax的请求，传递的是json字符串，后端把json字符串封装到user对象中
System.out.println(user);
//做响应，模拟查询数据库
user.setUsername("light");
user.setPassword("70578331");
user.setAge(18);
return user;
}
}