1、api

1.1实体类（Dept ）

@Data
@AllArgsConstructor
@NoArgsConstructor
@Accessors(chain = true) //链式写法
public class Dept implements Serializable {
    private Long deptno;
    private String dname;

    //一个服务对应一个数据库，同一信息可能存在不同数据库
    private String db_source;

    public Dept(String dname) {
        this.dname = dname;
    }
}

1.2数据库

2、provider

2.1 DeptController

//提供restful服务
@RestController
public class DeptController {

    @Autowired
    private DeptService deptService;

    @PostMapping("/dept/add")
    public boolean addDept(Dept dept){
        return deptService.addDept(dept);
    }

    @GetMapping("/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id){
        return deptService.queryById(id);
    }

    @GetMapping("/dept/list")
    public List<Dept> queryAll(){
        return deptService.queryAll();
    }


}

2.2 DeptDao

@Mapper
@Repository
public interface DeptDao {
    public boolean addDept(Dept dept);

    public Dept queryById(Long id);

    public List<Dept> queryAll();
}

2.3 DeptService

public interface DeptService {
    public boolean addDept(Dept dept);

    public Dept queryById(Long id);

    public List<Dept> queryAll();
}

2.4 DeptServiceImpl

@Service
public class DeptServiceImpl implements DeptService{

    @Autowired
    private DeptDao deptDao;

    @Override
    public boolean addDept(Dept dept) {
        return deptDao.addDept(dept);
    }

    @Override
    public Dept queryById(Long id) {
        return deptDao.queryById(id);
    }

    @Override
    public List<Dept> queryAll() {
        return deptDao.queryAll();
    }
}

2.5 application.yml

server:
  port: 8001

#mybatis配置
mybatis:
  type-aliases-package: com.guo.springcloud.pojo
  config-location:
  mapper-locations: classpath:mybatis/mapper/*.xml

#spring配置
spring:
  application:
    name: springcloud-provider-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db01?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
    username: root
    password: gj001212

3、consumer

3.1 ConfigBean

@Configuration
public class ConfigBean {

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

}

3.2 DeptConsumerController


@RestController
public class DeptConsumerController {

    //理解：消费者，不应该有service层
    //RestTemplate ... 供我们直接调用就可以了！
    //(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> queryAll(){
        return restTemplate.getForObject(REST_URL_PREFIX+"/dept/list",List.class);
    }


}