手把手教你搭建SpringCloud项目（二）生产者与消费者

￡神魔★判官ぃ 2023-10-13 18:43 56阅读 0赞

[什么是微服务？一看就会系列！][Link 1]

[一、手把手教你搭建SpringCloud项目（一）图文详解，傻瓜式操作][SpringCloud]

[二、手把手教你搭建SpringCloud项目（二）生产者与消费者][SpringCloud 1]

[三、手把手教你搭建SpringCloud项目（三）集成Eureka服务注册中心][SpringCloud_Eureka]

[四、手把手教你搭建SpringCloud项目（四）Eureka集群版搭建][SpringCloud_Eureka 1]

[五、手把手教你搭建SpringCloud项目（五）生产者集群版搭建][SpringCloud 2]

[六、手把手教你搭建SpringCloud项目（六）Eureka实现服务发现][SpringCloud_Eureka 2]

[七、手把手教你搭建SpringCloud项目（七）集成Consul服务注册中心][SpringCloud_Consul]

[八、手把手教你搭建SpringCloud项目（八）集成Ribbon负载均衡器][SpringCloud_Ribbon]

[九、手把手教你搭建SpringCloud项目（九）集成OpenFeign服务接口调用][SpringCloud_OpenFeign]

[十、手把手教你搭建SpringCloud项目（十）集成Hystrix之服务降级][SpringCloud_Hystrix]

[十一、手把手教你搭建SpringCloud项目（十一）集成Hystrix之服务熔断][SpringCloud_Hystrix 1]

[十二、手把手教你搭建SpringCloud项目（十二 ）集成Hystrix之图形化Dashboard实时监控][SpringCloud_ _Hystrix_Dashboard]

[十三、手把手教你搭建SpringCloud项目（十三 ）集成Gateway新一代网关][SpringCloud_ _Gateway]

[十四、手把手教你搭建SpringCloud项目（十四 ）集成Config分布式配置中心][SpringCloud_ _Config]

[十五、手把手教你搭建SpringCloud项目（十五）集成Bus消息总线][SpringCloud_Bus]

[十六、手把手教你搭建SpringCloud项目（十六）集成Stream消息驱动][SpringCloud_Stream]

[十七、手把手教你搭建SpringCloud项目（十七）集成Sleuth分布式链路跟踪][SpringCloud_Sleuth]

继续更新中，欢迎点赞关注！  
我们继续上一篇的文章，上一篇文章将总项目和实体类微服务搭建完成了，这篇文章我们将继续搭建，搭建生产者和消费者，生产者我们可以这样理解就是我们的服务端，就是我们使用代码写的业务逻辑接口，而消费者就是我们用户，用户通过app或者web调用我们服务端的接口，获取信息。那我们下面就直接搭建，从项目中进行了解学习。

我们首先搭建一个专门放我们支付业务的服务，来让其他服务来调用使用。支付服务就是其中的一个生产者。

### 一、新建生产者 ###

选中我们的父工程点击New，在点击Module，如下图：  
![在这里插入图片描述][df15970228e04b07a6827a5c24beaeca.png]

点击Next。  
![在这里插入图片描述][683177f01f734b37b31e6f9207c197cd.png]

继续Next，然后点击Finish。  
![在这里插入图片描述][85725f637d484af894ecd0043d5093a5.png]

修改pom.xml文件，添加依赖。具体的版本在总工程中管理，也可以在本工程中使用其他的版本。注意引入实体类的包。

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <parent>
            <artifactId>mcroservice</artifactId>
            <groupId>com.study.springcloud</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
     
        <artifactId>cloudprovidepayment</artifactId>
        <dependencies>
         <-- 引入实体的包-->
            <dependency>
                <groupId>com.study.springcloud</groupId>
                <artifactId>cloud-api-commons</artifactId>
                <version>${project.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>1.1.10</version>
            </dependency>
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-jdbc</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
     
     
    </project>

在resources文件下新建application.yml配置文件

server:
      port: 8001 #服务端口
    #spring相关配置
    spring:
      application:
        name: mcroservice-payment  #服务名
      datasource:
        type: com.alibaba.druid.pool.DruidDataSource  #当前数据源操作类型
        driver-class-name: org.gjt.mm.mysql.Driver  #数据库驱动包
        url: jdbc:mysql://localhost:3306/db01?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false
        username: root
        password: roo
    #mybatis:配置
    mybatis:
      mapperLocations: classpath:dao/*.xml
      type-aliases-package: com.buba.springcloud.pojo    # 所有pojo别名类所在包

写启动类

package com.buba.springclould;
     
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
     
    @SpringBootApplication
    public class PayMentMain {
        
        public static void main(String[] args) {
        
            SpringApplication.run(PayMentMain.class,args);
        }
    }

下面开始写业务，就是三层结构，如下图：  
![在这里插入图片描述][b478ec5c6755477bbcf47ae099b0bba2.png]

PaymentDao.java代码

package com.buba.springclould.dao;
    import com.buba.springcloud.pojo.Payment;
    import org.apache.ibatis.annotations.Mapper;
    import org.apache.ibatis.annotations.Param;
    import org.springframework.stereotype.Repository;
     
    @Mapper
    @Repository
    public interface PaymentDao {
        
       int create(Payment payment);
       Payment queryById(@Param("id")long id);
     
    }
    PaymentService.java代码
    
    package com.buba.springclould.service;
     
    import com.buba.springcloud.pojo.Payment;
    import org.apache.ibatis.annotations.Param;
    public interface PaymentService {
        
     
        int create(Payment payment);
     
        Payment queryById(@Param("id")long id);
    }

PaymentImple.java代码

package com.buba.springclould.service;
     
    import com.buba.springcloud.pojo.Payment;
    import com.buba.springclould.dao.PaymentDao;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
     
    @Service
    public class PaymentImple implements PaymentService {
        
        @Autowired
        PaymentDao paymentDao;
        @Override
        public int create(Payment payment) {
        
            return paymentDao.create(payment);
        }
     
        @Override
        public Payment queryById(long id) {
        
            return paymentDao.queryById(id);
        }
    }

PaymentControler.java代码

package com.buba.springclould.controller;
     
     
    import com.buba.springcloud.pojo.CommonResult;
    import com.buba.springcloud.pojo.Payment;
    import com.buba.springclould.service.PaymentService;
     
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.cloud.client.ServiceInstance;
    import org.springframework.cloud.client.discovery.DiscoveryClient;
    import org.springframework.web.bind.annotation.*;
    import java.util.List;
     
     
    /*
    * 提供restful服务  供其他服务调用
    *
    * */
    @RestController
    @Slf4j
    public class PaymentControler {
        
        @Autowired
        private PaymentService paymentService;
     
        @PostMapping("/payment/create")
        public CommonResult create(@RequestBody Payment dept){
        
            int i = paymentService.create(dept);
            log.info("***************插入成功*******"+i);
            if(i>0){
        
                return new CommonResult(200,"插入数据库成功"+serverPort,i);
            }else{
        
                return new CommonResult(444,"插入数据库失败",null);
            }
        }
        @GetMapping("/payment/get/{id}")
     
        public CommonResult queryById(@PathVariable("id") Long id){
        
            Payment payment = paymentService.queryById(id);
            log.info("***************查询成功*********"+payment);
            if(payment!=null){
        
                return new CommonResult(200,"查询成功"+serverPort,payment);
            }else{
        
                return new CommonResult(444,"查询失败",null);
            }
        }
        
    }

在resources\\dao\\文件夹下新建PaymentDao.xml文件，与PaymentDao映射，这里注意新建要新建spring的可识别的配置的xml文件，不会报错说找不到方法。如下图:

![在这里插入图片描述][506b14972eb54c8fa96a72d47e38b963.png]

新建PaymentDao.xml文件,如下图：

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper
            PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dqueryByidtd/mybatis-3-mapper.dtd">
     
     
    <mapper namespace="com.buba.springclould.dao.PaymentDao">
        <resultMap id="BaseResultMap" type="com.buba.springcloud.pojo.Payment">
            <id column="id" property="id" jdbcType="BIGINT"/>
            <id column="serial" property="serial" jdbcType="VARCHAR"/>
        </resultMap>
     
        <insert id="create" parameterType="com.buba.springcloud.pojo.Payment" useGeneratedKeys="true" keyProperty="id">
            insert into payment (serial) values (#{serial});
        </insert>
     
        <select id="queryById" resultType="com.buba.springcloud.pojo.Payment" parameterType="Long" resultMap="BaseResultMap">
            select * from payment  where id = #{id};
        </select>
     
     
    </mapper>

### 二、新建消费者服务 ###

订单的服务端的工程（生产者）我们就搭建完成了，那我们开始搭建订单的客户端工程（消费者）。选中我们的父工程点击New，在点击Module，如下图：  
![在这里插入图片描述][b0b7bf50375346efbc0ecb00ee44fc76.png]

点击Next，填写工程名称。  
![在这里插入图片描述][4b119c207ae24d038f94544249c2f321.png]

继续Next，确认工程名称，然后点击Finish完成订单服务工程创建。

![在这里插入图片描述][8b8d608030224d9a82b4217f96c56d62.png]

开始配置修改pom.xml文件，添加依赖。具体的版本在总工程中管理，也可以在本工程中使用其他的版本。注意引入实体类的包。

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <parent>
            <groupId>com.study.springcloud</groupId>
            <artifactId>mcroservice</artifactId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
     
        <artifactId>cloud-consumer-order</artifactId>
        <dependencies>       
            <dependency>
                 <-- 引入实体的包-->
                <groupId>com.study.springcloud</groupId>
                <artifactId>cloud-api-commons</artifactId>
                <version>${project.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
     
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>com.study.springcloud</groupId>
                <artifactId>cloud-api-commons</artifactId>
                <version>1.0-SNAPSHOT</version>
                <scope>compile</scope>
            </dependency>
        </dependencies>
     
    </project>

在resources文件下新建application.yml配置文件

server:
      port: 80
    spring:
      application:
        name: mcroservice-order  #服务名

写启动类

package com.buba.springclould.order;
     
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
     
    @SpringBootApplication
    public class OrderMain {
        
        public static void main(String[] args) {
        
            SpringApplication.run(OrderMain.class,args);
        }
    }

新建RestTemplate配置类注入到Spring中ioc容器中

这里服务间的调用，我们使用了RestTemplate，RestTemplate提供了多种便捷访问远程Http服务的方法，是一种简单便捷的访问restful服务的模板类，是spring提供的用于访问Rest服务的客户端模板工具集。

package com.buba.springclould.order.config;
     
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.client.RestTemplate;
     
    @Configuration
    public class ApplicationContextConfig {
        
        @Bean
        public RestTemplate getRestTemplate(){
        
            return new RestTemplate();
        }
    }

写消费者的业务调用接口

package com.buba.springclould.order.controller;
     
     
    import com.buba.springcloud.pojo.CommonResult;
    import com.buba.springcloud.pojo.Payment;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
     
    @RestController
    @Slf4j
    public class OrderController {
        
        //调用支付订单服务端的ip+端口号
        public static final  String PAYMENT_URL = "http://localhost:8001";
        
        @Autowired
        private RestTemplate restTemplate;
        //创建支付订单的接口
        @GetMapping("/consumer/payment/create")
        public CommonResult<Payment> create(Payment payment){
        
            return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment, CommonResult.class);
        }
        //获取id获取支付订单
        @GetMapping("/consumer/payment/get/{id}")
        public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        
            return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
        }
    }

### 三、服务间调用测试 ###

生产者和消费者就搭建完成啦。那我们现在就测试一下看看，支付消费者能否成功调用支付生产者。分别启动两个工程。首先自测一下生产者的服务是否可以访问，端口为8001，如下图可以访问成功，说明生产者的服务是没有问题的。

![在这里插入图片描述][7e306fd85c2648aa9d41f7f0b83cb398.png]

我们消费者的端口配置为80，访问就可以省略端口，直接输入：http://localhost/consumer/payment/get/1访问。成功获取到id为1的支付订单。

![在这里插入图片描述][ced0d14af1254163a5dbec3b29fad6eb.png]

到这里我们springcloud的简单的搭建就成功啦。是不是so easy！

![在这里插入图片描述][427923de87c9447c8f5440036e6cb282.png]

那接下来我们会继续学习，我们下一篇文章将搭建支付服务端的集群与集成eureka服务注册与发现。持续关注、点赞。我们持续更新中。

[Link 1]: https://blog.csdn.net/weixin_39570655/article/details/131760202
[SpringCloud]: https://blog.csdn.net/weixin_39570655/article/details/131760874
[SpringCloud 1]: https://blog.csdn.net/weixin_39570655/article/details/131764363
[SpringCloud_Eureka]: https://blog.csdn.net/weixin_39570655/article/details/131764668
[SpringCloud_Eureka 1]: https://blog.csdn.net/weixin_39570655/article/details/131775415
[SpringCloud 2]: https://blog.csdn.net/weixin_39570655/article/details/131775500
[SpringCloud_Eureka 2]: https://blog.csdn.net/weixin_39570655/article/details/131784991
[SpringCloud_Consul]: https://blog.csdn.net/weixin_39570655/article/details/131785013
[SpringCloud_Ribbon]: https://blog.csdn.net/weixin_39570655/article/details/131810185
[SpringCloud_OpenFeign]: https://blog.csdn.net/weixin_39570655/article/details/131810328
[SpringCloud_Hystrix]: https://blog.csdn.net/weixin_39570655/article/details/131810543
[SpringCloud_Hystrix 1]: https://blog.csdn.net/weixin_39570655/article/details/131824189
[SpringCloud_ _Hystrix_Dashboard]: https://blog.csdn.net/weixin_39570655/article/details/131824429
[SpringCloud_ _Gateway]: https://blog.csdn.net/weixin_39570655/article/details/131830964
[SpringCloud_ _Config]: https://blog.csdn.net/weixin_39570655/article/details/131831433
[SpringCloud_Bus]: https://blog.csdn.net/weixin_39570655/article/details/131833875
[SpringCloud_Stream]: https://blog.csdn.net/weixin_39570655/article/details/131834057
[SpringCloud_Sleuth]: https://blog.csdn.net/weixin_39570655/article/details/131834420
[df15970228e04b07a6827a5c24beaeca.png]: https://img-blog.csdnimg.cn/df15970228e04b07a6827a5c24beaeca.png
[683177f01f734b37b31e6f9207c197cd.png]: https://img-blog.csdnimg.cn/683177f01f734b37b31e6f9207c197cd.png
[85725f637d484af894ecd0043d5093a5.png]: https://img-blog.csdnimg.cn/85725f637d484af894ecd0043d5093a5.png
[b478ec5c6755477bbcf47ae099b0bba2.png]: https://img-blog.csdnimg.cn/b478ec5c6755477bbcf47ae099b0bba2.png
[506b14972eb54c8fa96a72d47e38b963.png]: https://img-blog.csdnimg.cn/506b14972eb54c8fa96a72d47e38b963.png
[b0b7bf50375346efbc0ecb00ee44fc76.png]: https://img-blog.csdnimg.cn/b0b7bf50375346efbc0ecb00ee44fc76.png
[4b119c207ae24d038f94544249c2f321.png]: https://img-blog.csdnimg.cn/4b119c207ae24d038f94544249c2f321.png
[8b8d608030224d9a82b4217f96c56d62.png]: https://img-blog.csdnimg.cn/8b8d608030224d9a82b4217f96c56d62.png
[7e306fd85c2648aa9d41f7f0b83cb398.png]: https://img-blog.csdnimg.cn/7e306fd85c2648aa9d41f7f0b83cb398.png
[ced0d14af1254163a5dbec3b29fad6eb.png]: https://img-blog.csdnimg.cn/ced0d14af1254163a5dbec3b29fad6eb.png
[427923de87c9447c8f5440036e6cb282.png]: https://img-blog.csdnimg.cn/427923de87c9447c8f5440036e6cb282.png