域：协议 + ip(域名) + 端口
建立Controller：
1 package com.yas.controller; 2 3 import org.springframework.web.bind.annotation.CrossOrigin; 4 import org.springframework.web.bind.annotation.RequestMapping; 5 import org.springframework.web.bind.annotation.RestController; 6 7 import javax.servlet.http.HttpSession; 8 9 @RequestMapping("/origin") 10 @RestController 11 @CrossOrigin("http://localhost:8080")//设置前端server的地址 12 public class SysUserController { 13 14 @RequestMapping("/test1") 15 public String test1(HttpSession session) { 16 session.setAttribute("name", "zhangsan"); 17 System.out.println("存入session"); 18 return "ok"; 19 } 20 21 @RequestMapping("/test2") 22 public String test2(HttpSession session) { 23 String name = (String) session.getAttribute("name"); 24 System.out.println("从session中取出数据：" + name); 25 return "ok"; 26 } 27 }
测试页面：
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> <script src="https://code.jquery.com/jquery-2.1.0.min.js"></script> <script> function getCross(){ $.ajax({ url:"http://localhost:8080/origin/test1", type:"post", xhrFields:{ withCredentials:true }, success:function (d){ console.log(d); } }); } function getCross2(){ $.ajax({ url:"http://localhost:8080/origin/test2", type:"post", xhrFields:{ withCredentials:true }, success:function (d){ console.log(d); } }); } </script> </head> <body> <input type="button" value="跨域请求" onclick="getCross()"> <input type="button" value="跨域请求2" onclick="getCross2()"> </body> </html>