SpringCloud学习（5）：Rest学习环境搭建：服务消费者

小灰灰 2023-01-09 14:14 140阅读 0赞

### 一、搭建消费者服务 ###

（1）创建服务消费者模块

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjk4MzUx_size_16_color_FFFFFF_t_70][]

（2）导入依赖

<?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</artifactId>
            <groupId>com.buba</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>springcloud-consumer-dept-80</artifactId>
    
        
        <dependencies>
            <dependency>
                <groupId>com.buba</groupId>
                <artifactId>springcloud-api</artifactId>
                <version>1.0-SNAPSHOT</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
            </dependency>
        </dependencies>
    </project>

（3）application.yml配置

![20210121152900675.png][]

### 二、编写消费者 ###

（1）消费者要想访问远程服务，需要使用RestTemplate类，所以把RestTemplate交给Spring管理，这里使用java代码方式。

package com.buba.springcloud.config;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.client.RestTemplate;
    
    /**
     * @Configuration 相当于applicationContext.xml
     */
    @Configuration
    public class ConfigBean {
    
        /**
         * 把RestTemplate对象交给Spring管理
         * @return
         */
        @Bean
        public RestTemplate getRestTemplate(){
            return new RestTemplate();
        }
    }

（2）编写Controller层

package com.buba.springcloud.controller;
    
    import com.buba.springcloud.pojo.Dept;
    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;
    
    import java.util.List;
    
    @RestController
    public class DeptConsumerController {
    
        // 消费者不应该有Service层，使用RestTemplate调用Service。RestTemplate封装了多种访问Http请求的类。
        private RestTemplate restTemplate;
    
        private static final String REST_URL_PREFIX = "http://localhost:8001";
    
        @RequestMapping("/consumer/dept/get/{deptId}")
        public Dept get(@PathVariable("deptId") long deptId) {
            // 传递的参数可以使用map进行封装、可以直接在路径上拼接、可以使用实体类传递
            return restTemplate.getForObject(REST_URL_PREFIX + "/dept/get/", Dept.class, deptId);
        }
    
        @RequestMapping("/consumer/dept/add")
        public boolean add(Dept dept) {
            return restTemplate.postForObject(REST_URL_PREFIX + "/dept/addDept", dept, Boolean.class);
        }
    
        @RequestMapping("/consumer/dept/list")
        public List<Dept> list() {
            return restTemplate.getForObject(REST_URL_PREFIX + "/dept/list", List.class);
        }
    
    
        @Autowired
        public void setRestTemplate(RestTemplate restTemplate) {
            this.restTemplate = restTemplate;
        }
    }

### 三、编写启动类测试 ###

package com.buba.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    @SpringBootApplication
    public class DeptConsumer_80 {
        public static void main(String[] args) {
            SpringApplication.run(DeptConsumer_80.class, args);
        }
    }

先启动提供方，在启动消费方

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjk4MzUx_size_16_color_FFFFFF_t_70 1][]

输入地址，因为端口号80是默认端口号，所以可以省略。

![20210121162812311.png][]

访问成功。

![20210121162853244.png][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjk4MzUx_size_16_color_FFFFFF_t_70]: /images/20221119/1bfd10eeef5b4c649f955eb4b8c6aa18.png
[20210121152900675.png]: https://img-blog.csdnimg.cn/20210121152900675.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjk4MzUx_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20210121162415879.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMjk4MzUx,size_16,color_FFFFFF,t_70
[20210121162812311.png]: https://img-blog.csdnimg.cn/20210121162812311.png
[20210121162853244.png]: https://img-blog.csdnimg.cn/20210121162853244.png