编写微服务api

1.创建实体类模块

2.导入lombok

1<dependencies>
2        <dependency>
3            <groupId>org.projectlombok</groupId>
4            <artifactId>lombok</artifactId>
5            <scope>provided</scope>
6        </dependency>
7    </dependencies>

3.添加实体类

1package com.cx;
2
3import lombok.Data;
4
5import java.math.BigDecimal;
6import java.util.List;
7
8/**
9 * @author Jiang
10 * @date 2025/11/7
11 */
12@Data
13public class Order {
14    private Long id;
15    private BigDecimal totalAmount;
16    private Long userId;
17    private String nickName;
18    private String address;
19    private List<Product> productList;
20}

1package com.cx;
2
3import lombok.Data;
4
5import java.math.BigDecimal;
6
7/**
8 * @author Jiang
9 * @date 2025/11/7
10 */
11@Data
12public class Product {
13    private Long id;
14    private BigDecimal price;
15    private String productName;
16    private int num;
17}

4.在services的pom文件中导入model

1 <dependency>
2    <groupId>com.cx</groupId>
3    <artifactId>model</artifactId>
4    <version>0.0.1-SNAPSHOT</version>
5</dependency>

5.基本流程

6.product模块代码

1package com.cx.product.controller;
2
3import com.cx.Product;
4import com.cx.product.service.ProductService;
5import org.springframework.beans.factory.annotation.Autowired;
6import org.springframework.web.bind.annotation.GetMapping;
7import org.springframework.web.bind.annotation.PathVariable;
8import org.springframework.web.bind.annotation.RestController;
9
10/**
11 * @author Jiang
12 * @date 2025/11/7
13 */
14@RestController
15public class ProductController {
16    @Autowired
17    ProductService productService;
18
19    @GetMapping(value = "/productId/{id}")
20    public Product getProductById(@PathVariable("id") Long productId) {
21        return productService.getProductById(productId);
22    }
23}

1package com.cx.product.service;
2
3import com.cx.Product;
4
5/**
6 * @author Jiang
7 * @date 2025/11/7
8 */
9public interface ProductService {
10    Product getProductById(Long productId);
11}
12

1package com.cx.product.service.impl;
2
3import com.cx.Product;
4import com.cx.product.service.ProductService;
5import org.springframework.stereotype.Service;
6
7import java.math.BigDecimal;
8
9/**
10 * @author Jiang
11 * @date 2025/11/7
12 */
13@Service
14public class ProductServiceImpl implements ProductService {
15    @Override
16    public Product getProductById(Long productId) {
17        Product product = new Product();
18        product.setId(productId);
19        product.setPrice(new BigDecimal("99"));
20        product.setProductName("苹果-" + productId);
21        product.setNum(11);
22        return product;
23    }
24}

7.order模块代码

1package com.cx.order.controller;
2
3import com.cx.Order;
4import com.cx.order.service.OrderService;
5import org.springframework.beans.factory.annotation.Autowired;
6import org.springframework.web.bind.annotation.GetMapping;
7import org.springframework.web.bind.annotation.RequestParam;
8import org.springframework.web.bind.annotation.RestController;
9
10/**
11 * @author Jiang
12 * @date 2025/11/7
13 */
14@RestController
15public class OrderController {
16    @Autowired
17    OrderService orderService;
18
19    @GetMapping(value = "/create")
20    public Order createOrder(@RequestParam("userId") Long userId, @RequestParam("productId") Long productId) {
21        return orderService.createOrder(userId, productId);
22    }
23}

1package com.cx.order.service;
2
3import com.cx.Order;
4
5/**
6 * @author Jiang
7 * @date 2025/11/7
8 */
9public interface OrderService {
10    Order createOrder(Long userId, Long productId);
11}

1package com.cx.order.service.impl;
2
3import com.cx.Order;
4import com.cx.order.service.OrderService;
5import org.springframework.stereotype.Service;
6
7import java.math.BigDecimal;
8
9/**
10 * @author Jiang
11 * @date 2025/11/7
12 */
13@Service
14public class OrderServiceImpl implements OrderService {
15    @Override
16    public Order createOrder(Long userId, Long productId) {
17        Order order = new Order();
18        order.setId(1L);
19        //TODO 总金额
20        order.setTotalAmount(new BigDecimal("0"));
21        order.setUserId(userId);
22        order.setNickName("张三");
23        order.setAddress("火星");
24        //TODO 远程查询商品列表
25        order.setProductList(null);
26        return order;
27    }
28}

《编写微服务api》 是转载文章，点击查看原文。