Spring WebFlux学习笔记

1. 添加依赖

   <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-webflux</artifactId>
   </dependency>
   

2. 编写Handler业务处理

   @Slf4j
   @Component
   public class UserHandler {
         
         
       // 替代以springmvc中@RequestParam接收的参数
       public Mono<ServerResponse> add(ServerRequest request) {
         
         
           Mono<MultiValueMap<String, String>> formData = request.exchange().getFormData() ;
           return formData.flatMap(multiValueMap -> {
         
         
               String username = multiValueMap.getFirst("username");
               String addr = multiValueMap.getFirst("addr") ;
               log.info("=====> username : {}， addr: {}", username, addr);
               return ServerResponse.ok().contentType(MediaType.APPLICATION_JSON).body(
                       Mono.just(JsonResult.success("success")),JsonResult.class
               );
           }) ;
       }
       // 替待springmvc中@RequestBody接收的参数
       public Mono<ServerResponse> add2(ServerRequest request) {
         
         
           Mono<User> userMono = request.bodyToMono(User.class);
           log.info("add2 method execute ...");
           Mono<JsonResult<String>> resultMono = userMono.map(user -> {
         
         
               String retContent = doBusi(user);
               return JsonResult.success(retContent);
           });
           return ServerResponse.ok().contentType(MediaType.APPLICATION_JSON).body(resultMono,JsonResult.class);
       }
       // 业务处理方法一般调用service
       private String doBusi(User user){
         
         
          log.info("username : {}, addr : {}", user.getUsername(), user.getAddr());
          log.info("do busi .....");
          sleep(1000);
          return "Hello world" ;
       }
       private void sleep(int time){
         
         
          try {
         
         
              Thread.sleep(time);
          } catch (InterruptedException e) {
         
         
              e.printStackTrace();
          }
       }
   }
   

3. 编写route配置

   @Configuration
   public class MyRouteConfig {
         
         
       @Autowired
       private UserHandler userHandler ;
       @Bean
       public RouterFunction<ServerResponse> routerFunction(){
         
         
           return RouterFunctions
                   .route(POST("/api/users/add"), userHandler::add)
                   .andRoute(RequestPredicates.POST("/api/users/add2")
                       .and(RequestPredicates.accept(MediaType.APPLICATION_JSON)), userHandler::add2) ;
       }
   }
   

4. 可以用Controller形式编写webflux处理(与上面步骤3，4中的配置/api/users/add2效果一样)

   @Slf4j
   @RestController
   @RequestMapping("/api/users")
   public class UserController {
         
         
       @PostMapping("/add3")
       public Mono<JsonResult<String>> add2(@RequestBody User user){
         
         
           log.info("user : {}", user);
           return Mono.just(JsonResult.success("success")) ;
       }
   }
   

5. Webflux官网地址：https://docs.spring.io/spring-framework/docs/current/reference/html/web-reactive.html