简单实现Springcloud跨项目相互调用

约定不等于承诺〃 2024-03-31 11:05 40阅读 0赞

一、前置准备

二、项目准备

三、实现跨项目调用

--------------------

## 一、前置准备 ##

我们本次是使用的电商项目中的商品、订单、用户为案例进行讲解。

### ![0f1278b2b6814fd789eae62a9bc0954c.png][] 技术选型 ###

> maven：3.5.4  
> 数据库：MySQL 5.7  
> 持久层: SpingData Jpa/Mybatis-plus  
> 其他: SpringCloud Alibaba 技术栈

### 模块设计 ###

> springcloud-shop父工程  
> shop-common 公共模块【实体类】  
> shop-user 用户微服务 【端口: 8070】  
> shop-product 商品微服务 【端口: 8080】  
> shop-order 订单微服务 【端口: 8090】

## 二、项目准备 ##

接下来我们做实现微服务的项目准备环节：

> ### 1、创建父工程 ###
> 
> 父工程是maven项目
> 
> ![c622615225b449b9b693b61882829388.png][]
> 
> ![8b1c00d14b0f4f5aa030c20e9ab46952.png][]
> 
> ![dd58eddf466a47c29698d7f9ce1ae2bd.png][] **创建完成过后更改maven地址！！！**
> 
> ![2f9a4978efc9402188ed29cc68458954.png][]
> 
> ### 2、导入pom依赖 ###
> 
>     <?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">
>         <modelVersion>4.0.0</modelVersion>
>     
>         <groupId>com.zq</groupId>
>         <artifactId>springcloud-shop</artifactId>
>         <version>1.0-SNAPSHOT</version>
>         <packaging>pom</packaging>
>         
>         <properties>
>             <java.version>1.8</java.version>
>             <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
>             <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
>             <spring-boot.version>2.3.2.RELEASE</spring-boot.version>
>             <spring-cloud.version>Hoxton.SR9</spring-cloud.version>
>             <spring-cloud-alibaba.version>2.2.6.RELEASE</spring-cloud-alibaba.version>
>         </properties>
>     
>         <dependencyManagement>
>             <dependencies>
>                 
>                 <dependency>
>                     <groupId>org.springframework.boot</groupId>
>                     <artifactId>spring-boot-dependencies</artifactId>
>                     <version>${spring-boot.version}</version>
>                     <type>pom</type>
>                     <scope>import</scope>
>                 </dependency>
>             </dependencies>
>         </dependencyManagement>
>     
>     </project>
> 
> 在这里我们需要注意的一点事Springcloud与Springboot的版本问题：
> 
> 这里给出对应的版本对应关系表：
> 
> ![5dd4f4e8459b42f49f3317bca9a08ae6.png][]
> 
> ### 3、创建基础模块 ###
> 
> 基础模块也是Maven项目所以步骤和上面创建父工程一样
> 
> ![fb8a04057c8541dc9d281a80344bec8b.png][]
> 
> ### 4、导入基础模块的pom依赖 ###
> 
>     <?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>springcloud-shop</artifactId>
>             <groupId>com.zq</groupId>
>             <version>1.0-SNAPSHOT</version>
>         </parent>
>         <modelVersion>4.0.0</modelVersion>
>     
>         <artifactId>shop-common</artifactId>
>     
>         
>         <dependencies>
>             <dependency>
>                 <groupId>org.springframework.boot</groupId>
>                 <artifactId>spring-boot-starter-data-jpa</artifactId>
>             </dependency>
>             <dependency>
>                 <groupId>org.projectlombok</groupId>
>                 <artifactId>lombok</artifactId>
>             </dependency>
>             <dependency>
>                 <groupId>com.alibaba</groupId>
>                 <artifactId>fastjson</artifactId>
>                 <version>1.2.56</version>
>             </dependency>
>             <dependency>
>                 <groupId>mysql</groupId>
>                 <artifactId>mysql-connector-java</artifactId>
>                 <version>5.1.44</version>
>             </dependency>
>         </dependencies>
>     
>     </project>
> 
> 在这里区别创建Maven和Springboot项目，我们创建Maven项目，在父工程的pom.xml中会自动的产生子模块的标记：而springboot项目需要自己手动添加
> 
> ![c82fad324060448899f9da76d1bd7a67.png][]
> 
> ### 5、创建实体类放于基础模块 ###
> 
> 这里小编就是放入的三个实体类
> 
> ![79061575158c45b1a15f492abe780c64.png][]
> 
> ### 6、创建用户微服务 ###
> 
> 导入用户服务的Pom依赖
> 
>     <?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">
>         <parent>
>             <artifactId>springcloud-shop</artifactId>
>             <groupId>com.zq</groupId>
>             <version>1.0-SNAPSHOT</version>
>         </parent>
>         <modelVersion>4.0.0</modelVersion>
>         <artifactId>shop-user</artifactId>
>     
>         <dependencies>
>             
>             <dependency>
>                 <groupId>org.springframework.boot</groupId>
>                 <artifactId>spring-boot-starter-web</artifactId>
>             </dependency>
>             
>             <dependency>
>                 <groupId>com.zq</groupId>
>                 <artifactId>shop-common</artifactId>
>                 <version>1.0-SNAPSHOT</version>
>             </dependency>
>         </dependencies>
>     
>     </project>
> 
> ### 7、创建商品微服务 ###
> 
> 导入商品微服务的pom依赖
> 
>     <?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">
>         <parent>
>             <artifactId>springcloud-shop</artifactId>
>             <groupId>com.zq</groupId>
>             <version>1.0-SNAPSHOT</version>
>         </parent>
>         <modelVersion>4.0.0</modelVersion>
>         <artifactId>shop-product</artifactId>
>     
>         <dependencies>
>             
>             <dependency>
>                 <groupId>org.springframework.boot</groupId>
>                 <artifactId>spring-boot-starter-web</artifactId>
>             </dependency>
>             
>             <dependency>
>                 <groupId>com.zq</groupId>
>                 <artifactId>shop-common</artifactId>
>                 <version>1.0-SNAPSHOT</version>
>             </dependency>
>         </dependencies>
>     
>     </project>
> 
> ### 8、创建订单微服务 ###
> 
> 导入订单的Pom依赖
> 
>     <?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">
>         <parent>
>             <artifactId>springcloud-shop</artifactId>
>             <groupId>com.zq</groupId>
>             <version>1.0-SNAPSHOT</version>
>         </parent>
>         <modelVersion>4.0.0</modelVersion>
>         <artifactId>shop-order</artifactId>
>     
>         <dependencies>
>             
>             <dependency>
>                 <groupId>org.springframework.boot</groupId>
>                 <artifactId>spring-boot-starter-web</artifactId>
>             </dependency>
>             
>             <dependency>
>                 <groupId>com.zq</groupId>
>                 <artifactId>shop-common</artifactId>
>                 <version>1.0-SNAPSHOT</version>
>             </dependency>
>         </dependencies>
>     
>     </project>
> 
> ### 9、修改三个微服务的访问端口 ###
> 
> ![604b9fdbc7d34101a8cf6eee25b0c733.png][]
> 
> 到这里我们的准备OK了，接下来就是代码实现微服务的相互调用了。

## 三、实现跨项目调用编码 ##

### 3.1用户微服务Controller代码编写 ###

package com.zq.shopuser.controller;
    
    import com.zq.entity.User;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * @author张强
     * @site www.zq.com
     * @create  2022-11-25 15:26
     */
    @RequestMapping("/user")
    @RestController
    public class UserController {
        @RequestMapping("/get/{id}")
        public User get(@PathVariable("id") Integer id){
    //        查询数据库
            return new User(id,"zq","123456","15679031652");
        }
    }

### 3.2商品微服务Controller代码编写 ###

package com.zq.shopproduct.controller;
    
    import com.zq.entity.Product;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * @author张强
     * @site www.zq.com
     * @create  2022-11-25 15:31
     */
    @RestController
    @RequestMapping("/product")
    public class ProductController {
        @RequestMapping("/get/{pid}")
        public Product get(@PathVariable("pid") Integer pid){
            Product p = new Product(pid, "香荷泥煎面", 36d, 36);
            return p;
        }
    }

### 3.3订单微服务Controller代码编写 ###

package com.zq.shoporder.controller;
    
    import com.zq.entity.Order;
    import com.zq.entity.Product;
    import com.zq.entity.User;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    /**
     * @author张强
     * @site www.zq.com
     * @create  2022-11-25 15:35
     */
    @RequestMapping("/order")
    @RestController
    public class OrderController {
    
        @Autowired
        private RestTemplate restTemplate;
    
        @RequestMapping("/get/{uid}/{pid}")
        public Order get(@PathVariable("uid") Integer uid,
                         @PathVariable("pid") Integer pid){
            User user = restTemplate.getForObject("http://localhost:8070/user/get/" + uid, User.class);
            Product product = restTemplate.getForObject("http://localhost:8090/product/get/" + pid, Product.class);
            Order order = new Order();
            order.setNumber(2);
            order.setOid(System.currentTimeMillis());
            order.setPid(pid);
            order.setPname(product.getPname());
            order.setPprice(product.getPprice() * order.getNumber());
            order.setUid(user.getUid());
            order.setUsername(user.getUsername());
            return order;
        }
    }

### 测试结果： ###

![b5017c345c2b46b0939c76fa792f2c9d.png][]

[0f1278b2b6814fd789eae62a9bc0954c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/b1f7e10c65dd4c81bda75ac8f5931b48.png
[c622615225b449b9b693b61882829388.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/8448c58ddf8c4a69a1ec9232de4f6b6f.png
[8b1c00d14b0f4f5aa030c20e9ab46952.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/a40538ee35424a028db5efcec359c979.png
[dd58eddf466a47c29698d7f9ce1ae2bd.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/e56d9860f40344779f9a711f62239104.png
[2f9a4978efc9402188ed29cc68458954.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/71de6c36aeb9445bbdf1ce7691f03a77.png
[5dd4f4e8459b42f49f3317bca9a08ae6.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/31b4d756cfaf449f98d1a6f0631512a8.png
[fb8a04057c8541dc9d281a80344bec8b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/2f32a1cc7b9e4f848cb21185dc4e1fb6.png
[c82fad324060448899f9da76d1bd7a67.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/861b0fa5325f49f7bc4daf0c0b247c4d.png
[79061575158c45b1a15f492abe780c64.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/3f112af3f6a74f8d806fcc9c2b23f08e.png
[604b9fdbc7d34101a8cf6eee25b0c733.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/c06a505bc5c6439a956c92d60db717f3.png
[b5017c345c2b46b0939c76fa792f2c9d.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/16d5799e6d184c2e903ebaed4df46436.png