Rest环境搭建：服务消费者

1.继续上篇文章，我们开始编写服务消费者，接着上次的项目，我们新建一个module。

2.编写springcloud-consumer-dept-80的pom.xml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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>springcloud</artifactId>
        <groupId>com.allen</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-consumer-dept-80</artifactId>

    <!-- 实体 + web -->
    <dependencies>
        <dependency>
            <groupId>com.allen</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.在springcloud-consumer-dept-80的resources目录下新建编写application.yml文件，配置端口号

server:
  port: 80

4.新建com.allen.springcloud.config包，在本包下面新建ConfigBean类，用来注入RestTemplte。

package com.allen.springcloud.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
public class ConfigBean {

    @Bean
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}

5.新建controller包，创建DeptConsumerController类，远程调用接口。

package com.allen.springcloud.controller;

import com.allen.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 {

    //理解：消费者，不应该有service层
    //RestTemplate 提供我们直接调用就可以了，注册到spring中
    //（url, 实体：Map , Class<T> responseType)

    @Autowired
    private RestTemplate restTemplate;//提供多种便捷访问远程http服务的方法，简单的Restful服务模板

    private static final String REST_URL_PREFIX = "http://localhost:8001";

    @RequestMapping("/consumer/dept/add")
    public boolean add(Dept dept){
        return restTemplate.postForObject(REST_URL_PREFIX + "/dept/add", dept, Boolean.class);
    }

    @RequestMapping("/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id){
        return restTemplate.getForObject(REST_URL_PREFIX + "/dept/get/" + id, Dept.class);
    }

    @RequestMapping("/consumer/dept/list")
    public List<Dept> list(){
        return restTemplate.getForObject(REST_URL_PREFIX + "/dept/list", List.class);
    }
}

6.编写启动类DeptConsumer_80

package com.allen.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);
    }
}

7.先启动提供者springcloud-provider-dept-8001，在启动消费者springcloud-consumer-dept-80

8.测试接口