玩转SpringCloud专题(十一)-SpringCloud之Feign请求参数处理

在上篇文章的基础上我们来介绍下Feign的请求参数的问题

1.单个参数

首先来看下单个参数的情况

1.1.service服务

在service服务中我们增加一个接收单个参数的方法

/**
 * @BelongsProject: springcloud0310
 * @BelongsPackage: com.bruceliu.api
 * @Author: bruceliu
 
 * @CreateTime: 2020-03-10 23:50
 * @Description: TODO
 */
@FeignClient(value = "SPRINGCLOUD-PRODUCER-DEMO")
public interface UserClientService {

    @RequestMapping("/all")
    public List<User> queryUsers();

    /**
     *  根据id查询用户信息
     *  Feign本身也是基于http请求的客户端
     *  在接收参数时我们需要通过@RequestParam注解来指明要接收的参数
     * @param id
     * @return
     */
    @GetMapping("/getUserById")
    public User getUserById(@RequestParam("id") Integer id);
}

1.2.provider服务

因为service服务的定义修改了，所以我们需要增加provider的服务

/**
 * @BelongsProject: springcloud0310
 * @BelongsPackage: com.bruceliu.controller
 * @Author: bruceliu
 * @
 * @CreateTime: 2020-03-10 11:39
 * @Description: TODO
 */
@Controller
public class UserController {

    @Autowired
    private UserService userService;

    /**
     *  根据id查询用户信息
     * @param id
     * @return
     */
    @GetMapping("/getUserById")
    @ResponseBody
    public User getProductById(Integer id){
        return userService.queryById(id);
    }
}

1.3.consumer服务

消费者中直接通过feign调用服务即可。

/**
 * @author bruceliu
 * @create 2019-10-15 15:32
 * @description
 */
@RestController
@Scope("prototype")
@RequestMapping("consumer")
public class ConsumerController {

    @Resource
    UserClientService userClientService;

    @RequestMapping(value="/get",method= RequestMethod.GET)
    @ResponseBody
    public User getProductById(@RequestParam("id") Integer id){
        return this.userClientService.getUserById(id);
    }

    @RequestMapping("/test")
    @ResponseBody
    public List<User> consumerTest(){
        return userClientService.queryUsers();
    }
}

启动服务访问:

2.多个参数

service服务

/**
     * GET方式
     *     获取多个参数
     *     注意：GET方式 形参必须多个分开
     */
    @GetMapping("/getUserByAgeAndSex")
    public User getUserByAgeAndSex(@RequestParam("age") Integer age,@RequestParam("sex") int sex);

2.1.1.provider服务

因为service服务的定义修改了，所以我们需要增加provider的服务

/**
 * @BelongsProject: springcloud0310
 * @BelongsPackage: com.bruceliu.controller
 * @Author: bruceliu
 * @QQ:1241488705
 * @CreateTime: 2020-03-10 11:39
 * @Description: TODO
 */
@Controller
public class UserController {

    @Autowired
    private UserService userService;

    @ResponseBody
    @GetMapping("/getUserByAgeAndSex")
    public User getUserByAgeAndSex(@RequestParam("age") Integer age,@RequestParam("sex") int sex){
        HashMap<String,Object> map=new HashMap<>();
        map.put("age",age);
        map.put("sex",sex);
        return userService.getUserByAgeAndSex(map);
    }
}

2.1.2.consumer服务

消费者中直接通过feign调用服务即可。

/**
 * @author bruceliu
 * @create 2019-10-15 15:32
 * @description
 */
@RestController
@Scope("prototype")
@RequestMapping("consumer")
public class ConsumerController {

    @Resource
    UserClientService userClientService;

    @GetMapping("/getUserByAgeAndSex")
    @ResponseBody
    public User getUserByAgeAndSex(@RequestParam("age") Integer age,@RequestParam("sex") int sex){
        return userClientService.getUserByAgeAndSex(age,sex);
    }
  }

启动服务访问:

3.对象参数

3.1.service服务

在service服务中我们增加一个接收单个参数的方法

/**
 * @BelongsProject: springcloud0310
 * @BelongsPackage: com.bruceliu.api
 * @Author: bruceliu
 *
 * @CreateTime: 2020-03-10 23:50
 * @Description: TODO
 */
@FeignClient(value = "SPRINGCLOUD-PRODUCER-DEMO")
public interface UserClientService {

    @PostMapping("/addUser")
    public int addUser(@RequestBody User user);
}

3.2.服务层接口

/**
 * @BelongsProject: springcloud0310
 * @BelongsPackage: com.bruceliu.controller
 * @Author: bruceliu

 * @CreateTime: 2020-03-10 11:39
 * @Description: TODO
 */
@Controller
public class UserController {

    @Autowired
    private UserService userService;

    @PostMapping("/addUser")
    @ResponseBody
    public int addUser(@RequestBody User user){
        System.out.println("新的对象是:"+user);
        return userService.addUser(user);
    }
 }

3.3.调用

/**
 * @author bruceliu
 * @create 2019-10-15 15:32
 * @description
 */
@RestController
@Scope("prototype")
@RequestMapping("consumer")
public class ConsumerController {

    @Resource
    UserClientService userClientService;

    @PostMapping("/addUser")
    @ResponseBody
    public int addUser(User user){
        System.out.println("表单数据是:"+user);
        return userClientService.addUser(user);
    }
}

3.4.测试