application.yml

spring:
  profiles:
    active: pre

  application-dev.yml

junzizhibang:
  url: dev.junzizhibang.com

@RestController
public class IndexController {
    @Value("${junzizhibang.url}")
    private String url;

    @RequestMapping("/getUrl")
    public String getUrl() {
        return url;
    }
}

JDBC的SPringCloud的配置

@Service
public class UserService {

    @Autowired
    private JdbcTemplate jdbcTemplate;


    public boolean addUser(String userName, Integer age) {
        int update = jdbcTemplate.update("insert into users values(null,?,?);", userName, age);
        return update > 0 ? true : false;
    }
}

yaml的数据库配置：

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/test
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver