1. 新建 controller / BuyerProductController 类

@RestController // RestController 与 Controller 的区别可看笔记
@RequestMapping("buyer/product")
public class BuyerProductController{

    @GetMapping("/list")
    public ResultViewObject list(){
        ResultViewObject resultViewObject = new ResultViewObject();               
    }
}

2. 根据约定好的 API 构造

约定的 API 格式, 大致如下

{
    "code":0,
    "msg":"Success",
    "data":{
        "name":null,
        "type":null,
        "foods":[
            {
                "id":null,
                "name":null,
                "price":null,
                "description":null,
                "icon":null
            }
        ]
    }
}

3. 返回值的结构

@Data
public class ResultViewObject<T>{
  private Integer code;
  private String msg;
  private T data;
}

data 的结构,CategoryView

@Data
public class CategoryView<T>{
    @JsonProperty("name")
    private String categoryName;
    @JsonProperty("type")
    private String categoryType;
    @JsonProperty("foods")
    private List<T> categoryFoods;
}

foods 的详情，ProductInfoView

@Data
public class ProductInfoView{
    @JsonProperty("id")
    private String ProductId;
    @JsonProperty("name")
    private String ProductName;
    @JsonProperty("price")
    private BigDecimal productPrice;
    @JsonProperty("description")
    private String productDescription;
    @JsonProperty("icon")
    private String productIcon;
}

4. 控制层，拼装返回值 controller/BuyerProductController

@RestController
@RequestMapping("buyer/product")
public class BuyerProductController{

    @GetMapping("/list")
    public ResultViewObject list(){
      ResultViewObject resultViewObject = new ResultViewObject();
      CategoryView categoryView = new CategoryView();
      List<ProductInfoView>  productInfoViews = new ProductInfoView();
      ProductInfoView productInfoView = new ProductInfoView();
      productInfoViews.add(productInfoView);
      resultViewObject.setCode("200");
      resultViewObject.setMsg("success");
      resultViewObject.setData(categoryView);
      return ResultViewObject;
    }
}

5. 配置网址头部

因为是要设计 Restful API，所以可以给网址设计一个头部的url，修改文件 application.yml

service:
  servlet:
    context-path: /sell

启动项目，访问 http://localhost:8080/sell/buyer/product/list