前端JS调用SpringBoot嵌入式服务器的实现方法

@RestController<br>public class ApiController {<br>    @GetMapping("/api/hello")<br>    public String hello() {<br>        return "Hello from Spring Boot!";<br>    }<br><br>    @PostMapping("/api/data")<br>    public Map<String, Object> postData(@RequestBody Map<String, Object> payload) {<br>        Map<String, Object> response = new HashMap<>();<br>        response.put("message", "Received data");<br>        response.put("data", payload);<br>        return response;<br>    }<br>}

fetch('http://localhost:8080/api/hello')<br>  .then(response => response.text())<br>  .then(data => console.log(data));

fetch('http://localhost:8080/api/data', {<br>  method: 'POST',<br>  headers: { 'Content-Type': 'application/json' },<br>  body: JSON.stringify({ name: 'Alice', age: 25 })<br>})<br>  .then(response => response.json())<br>  .then(data => console.log(data));

@CrossOrigin(origins = "http://localhost:3000")<br>@GetMapping("/api/hello")<br>public String hello() {<br>    return "Hello from Spring Boot!";<br>}

@Configuration<br>public class CorsConfig {<br>    @Bean<br>    public WebMvcConfigurer corsConfigurer() {<br>        return new WebMvcConfigurer() {<br>            @Override<br>            public void addCorsMappings(CorsRegistry registry) {<br>                registry.addMapping("/api/**")<br>                       .allowedOrigins("http://localhost:3000")<br>                       .allowedMethods("GET", "POST", "PUT", "DELETE");<br>            }<br>        };<br>    }<br>}

server.port=8080<br>server.address=localhost