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Spring Boot WebFlux增删改查样例

1、依赖

1.1、pom文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.wnx.mall.tiny</groupId>
    <artifactId>spring-boot-mongodb-crud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-boot-mongodb-crud</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.22</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

1.2、application.yaml

spring:
  data:
    mongodb:
      host: localhost
      port: 27017
      database: webflux

1.3、MongoDB数据库

2、配置

2.1、模型

package com.wnx.mall.tiny.entity;

import lombok.Data;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection = "user")
@Data
public class User {
    @Id
    private String id;
    private String name;
    private Integer age;
    private String description;


}

2.2、启动类加注解

package com.wnx.mall.tiny;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.mongodb.repository.config.EnableReactiveMongoRepositories;

@SpringBootApplication
@EnableReactiveMongoRepositories
public class SpringBootMongodbCrudApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootMongodbCrudApplication.class, args);
    }

}

2.3、继承MongoDB接口

package com.wnx.mall.tiny.repository;

import com.wnx.mall.tiny.entity.User;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
import org.springframework.stereotype.Repository;
import reactor.core.publisher.Flux;

@Repository
public interface  UserRepository extends ReactiveMongoRepository<User, String> {


}

3、业务

3.1、Service

package com.wnx.mall.tiny.service;

import com.wnx.mall.tiny.entity.User;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

public interface UserService {
    /**
     * 创建用户
     * @param user
     * @return
     */
     Mono<User> create(User user);

    /**
     * 根据ID删除用户
     * @param id
     * @return
     */
     Mono<Void> delete(String id);

    /**
     * 根据ID更新用户
     * @param id
     * @param user
     * @return
     */
     Mono<User> update(String id,User user);

    /**
     * 查询全部用户
     * @return
     */
     Flux<User> findAll();

    /**
     * 根据ID查询用户
     * @param id
     * @return
     */
     Mono<User> findById(String id);


}

3.2、ServiceImpl

package com.wnx.mall.tiny.service.impl;


import com.wnx.mall.tiny.entity.User;
import com.wnx.mall.tiny.repository.UserRepository;
import com.wnx.mall.tiny.service.UserService;
import org.springframework.data.mongodb.core.ReactiveMongoTemplate;

import org.springframework.stereotype.Service;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import javax.annotation.Resource;


@Service
public class UserServiceServiceImpl implements UserService {
    @Resource
    private UserRepository userRepository;
    @Resource
    private ReactiveMongoTemplate template;


    @Override
    public Mono<User> create(User user) {
        return userRepository.insert(user);
    }

    @Override
    public Mono<Void> delete(String id) {
        return userRepository.deleteById(id);
    }

    @Override
    public Mono<User> update(String id, User user) {

        return userRepository.findById(id).flatMap(x -> {
            x.setName(user.getName());
            x.setAge(user.getAge());
            x.setDescription(user.getDescription());
            return userRepository.save(x);
        });

    }

    @Override
    public Flux<User> findAll() {
        return userRepository.findAll();
    }

    @Override
    public Mono<User> findById(String id) {
        return userRepository.findById(id);
    }



}

3.3、Controller

package com.wnx.mall.tiny.controller;

import com.wnx.mall.tiny.entity.User;
import com.wnx.mall.tiny.service.UserService;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import javax.annotation.Resource;

@RestController
@RequestMapping("user")
public class UserController {
    @Resource
    private UserService userService;

    @PostMapping("/save")
    public Mono<User> create(User user){
        return userService.create(user);
    }

    /**
     * 删除返回200，删除失败返回404
     * @param id
     * @return
     */
    @GetMapping("/delete/{id}")
    public Mono<ResponseEntity<Void>>delete(@PathVariable(name = "id") String id){
        return userService.delete(id).
                then(Mono.just(new ResponseEntity<Void>(HttpStatus.OK)))
                .defaultIfEmpty(new ResponseEntity<>(HttpStatus.NOT_FOUND));
    }

    /**
     * 存在返回修改的User
     * 不存在返回404
     * @param id
     * @param user
     * @return
     */
    @PostMapping("/update/{id}")
    public Mono<ResponseEntity<User>> update(@PathVariable(name = "id")String id,User user){
        return userService.update(id, user)
                .map(u -> new ResponseEntity<>(u, HttpStatus.OK))
                .defaultIfEmpty(new ResponseEntity<>(HttpStatus.NOT_FOUND));

    }

    /**
     * 以数组的形式一次性返回全部数据
     * @return
     */
    @GetMapping("/findAll")
    public Flux<User> findAll(){
        return userService.findAll();
    }

    /**
     * 以Server sent events 的形式返回
     * @return
     */
    @GetMapping(value = "/stream", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
    public Flux<User> getUsersStream() {
        return userService.findAll();
    }
    /**
     * 根据用户 id查找
     * 存在返回，不存在返回 404
     */
    @GetMapping("/findById/{id}")
    public Mono<ResponseEntity<User>> getUser(@PathVariable String id) {
        return userService.findById(id)
                .map(user -> new ResponseEntity<>(user, HttpStatus.OK))
                .defaultIfEmpty(new ResponseEntity<>(HttpStatus.NOT_FOUND));
    }


}

4、测试

增删改，就不操作了。

http://localhost:8080/user/stream

data:{"id":"1","name":"王乃醒","age":24,"description":"这是王乃兴WebFlux测试"}

data:{"id":"2","name":"王乃醒2","age":24,"description":"这是王乃兴WebFlux测试"}

data:{"id":"3","name":"王乃醒3","age":24,"description":"这是王乃兴WebFlux测试"}

data:{"id":"4","name":"王乃醒4","age":24,"description":"这是王乃兴WebFlux测试"}

data:{"id":"5","name":"王乃醒5","age":24,"description":"这是王乃兴WebFlux测试"}

data:{"id":"6","name":"王乃醒6","age":24,"description":"这是王乃兴WebFlux测试"}

data:{"id":"7","name":"王乃醒7","age":24,"description":"这是王乃兴WebFlux测试"}

data:{"id":"8","name":"王乃醒8","age":24,"description":"这是王乃兴WebFlux测试"}

data:{"id":"9","name":"王乃醒9","age":24,"description":"这是王乃兴WebFlux测试"}

data:{"id":"10","name":"王乃醒10","age":24,"description":"这是王乃兴WebFlux测试"}

http://localhost:8080/user/findAll
[
    {
        "id": "1",
        "name": "王乃醒",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    },
    {
        "id": "2",
        "name": "王乃醒2",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    },
    {
        "id": "3",
        "name": "王乃醒3",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    },
    {
        "id": "4",
        "name": "王乃醒4",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    },
    {
        "id": "5",
        "name": "王乃醒5",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    },
    {
        "id": "6",
        "name": "王乃醒6",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    },
    {
        "id": "7",
        "name": "王乃醒7",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    },
    {
        "id": "8",
        "name": "王乃醒8",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    },
    {
        "id": "9",
        "name": "王乃醒9",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    },
    {
        "id": "10",
        "name": "王乃醒10",
        "age": 24,
        "description": "这是王乃兴WebFlux测试"
    }
]
http://localhost:8080/user/findById/2
{
    "id": "2",
    "name": "王乃醒2",
    "age": 24,
    "description": "这是王乃兴WebFlux测试"
}

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