新建一个SpringBoot项目，端口8080，配置CORS：
@Configuration public class MyWebMVCConfig implements WebMvcConfigurer { @Override public void addCorsMappings(CorsRegistry registry) { registry.addMapping("/book/**")//请求路径 .allowedHeaders("*")//请求头 .allowedMethods("*")//方法 .maxAge (1800) .allowedOrigins("http://localhost:8081");//支持的域 } }如果不使用类的话，也可以在单独的方法上面配置：
@RestController @RequestMapping("/book") public class BookController { @PostMapping("/a") // @CrossOrigin(value = "http://localhost:8080",maxAge = 1800,allowedHeaders = "*") public String addBook(String name){ return "添加" + name; } @DeleteMapping("/{id}") // @CrossOrigin(value = "http://localhost:8080",maxAge = 1800,allowedHeaders = "*") public String deleteBook(@PathVariable Long id){ return "删除" + String.valueOf(id); } }新建一个SpringBoot项目，端口8081，建一个html，第一个项目的控制器发送请求，
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script type="application/javascript" src="jquery.min.js"></script> </head> <body> <div id="contentDiv"></div> <div id="deleteResult"></div> <input type="button" value="提交数据" id="getData"/><br/> <input type="button" value="删除数据" id="deleteData"/><br/> <script> $(document).ready(function () { $("#getData").click(function () { $.ajax({ url:'http://localhost:8080/book/a', // headers: "Access-Control-Allow-Origin", type:'post', data:{name:'aaa'}, success:function (data) { $("#contentDiv").html(data); } }) }) $("#deleteData").click(function () { $.ajax({ url:'http://localhost:8080/book/99', // headers: "Access-Control-Allow-Origin", type:'delete', success:function (data) { $("#deleteResult").html(data); } }) }) }) </script> </body> </html>结果如下：
