SpringBoot-函数式Web

流程

给容器中放一个Bean:类型为RouterFunction<ServerResponse>,集中所有路由信息
每个业务准备一个自己的Handler

四大核心对象

RouterFunction:定义路由信息。发什么请求，谁来处理
RequestPredicates:定义请求：请求谓语。请求方式、请求参数
ServerRequest:封装请求完整数据
ServerResponse:封装响应完整数据

示例代码

配置类

java 复制代码

@Configuration
public class WebFunctionConfig {
    @Bean
    public RouterFunction<ServerResponse> router(UserBizHandler userBizHandler) {
        return RouterFunctions.route()
                .GET("/user/{id}", RequestPredicates.accept(MediaType.ALL), userBizHandler::getUser)
                .GET("/users", RequestPredicates.accept(MediaType.ALL), userBizHandler::getUsers)
                .POST("/user", RequestPredicates.accept(MediaType.APPLICATION_JSON), userBizHandler::createUser)
                .DELETE("/user/{id}", RequestPredicates.accept(MediaType.ALL), userBizHandler::deleteUser)
                .build();
    }
}

业务类

java 复制代码

package com.vmware.service;

import com.vmware.domain.User;
import jakarta.servlet.ServletException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.web.servlet.function.ServerRequest;
import org.springframework.web.servlet.function.ServerResponse;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

@Slf4j
@Service
public class UserBizHandler {
    public ServerResponse getUser(ServerRequest request) {
        User user = new User("张三", "12345678");
        return ServerResponse.ok().body(user);
    }

    public ServerResponse getUsers(ServerRequest request) {
        List<User> users = new ArrayList<>();
        users.add(new User("张三","1234"));
        users.add(new User("李四","abc"));
        users.add(new User("王五","hello"));
        //body中的对象就是@ResponseBody的原理，利用HttpMessageConverter写出为json
        return ServerResponse.ok().body(users);
    }

    public ServerResponse createUser(ServerRequest request) throws ServletException, IOException {
        User user = request.body(User.class);
        log.info("创建用户:{}",user);
        return ServerResponse.ok().build();
    }

    public ServerResponse deleteUser(ServerRequest request){
        String id = request.pathVariable("id");
        log.info("删除用户:{}",id);
        return ServerResponse.ok().build();
    }
}