上章节介绍了如何搭建订单服务，下面将继续搭建用户服务。
创建 cloud_user 数据库，执行如下 SQL：
SET NAMES utf8mb4; SET FOREIGN_KEY_CHECKS = 0; -- ---------------------------- -- Table structure for t_user -- ---------------------------- DROP TABLE IF EXISTS `t_user`; CREATE TABLE `t_user` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户ID', `name` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '姓名', `age` int(11) NULL DEFAULT NULL COMMENT '年龄', `email` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '电子邮件', PRIMARY KEY (`id`) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 5 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic; -- ---------------------------- -- Records of t_user -- ---------------------------- INSERT INTO `t_user` VALUES (1, '张珊', 27, 'zhangs@gmail.com'); INSERT INTO `t_user` VALUES (2, '李斯', 32, 'mrli@163.com'); INSERT INTO `t_user` VALUES (3, '王武', 29, 'w2u@sina.com'); INSERT INTO `t_user` VALUES (4, '赵柳', 38, 'zhaoliu@sina.com'); SET FOREIGN_KEY_CHECKS = 1;
运行 SQL 后，数据库中仅存在 t_user 表，如下图：
该表的内容如下图：
项目依赖如下，从父项目继承依赖：
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>com.hxstrive.springcloud</groupId> <artifactId>springcloud_learn</artifactId> <version>0.0.1-SNAPSHOT</version> <relativePath/> <!-- lookup parent from repository --> </parent> <artifactId>service_user</artifactId> <name>service_user</name> <description>service_user</description> <dependencies> <!-- 从父项目继承版本信息 --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> </dependency> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> </dependency> <dependency> <groupId>com.mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> </project>
下面 bootstrap.yml 配置文件内容（注意配置文件名称）：
server: port: 8081 spring: application: name: service-order # datasource datasource: driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/cloud_order?useUnicode=true&characterEncoding=utf-8 username: root password: aaaaaa cloud: # nacos 配置 nacos: # nacos 服务发现 discovery: server-addr: localhost:8848 username: nacos password: nacos # nacos 服务配置 config: server-addr: localhost:8848 username: nacos password: nacos refresh-enabled: true file-extension: yaml group: DEFAULT_GROUP logging: level: root: warn
package com.hxstrive.springcloud.user.entity;
/**
* 用户实体
* @author hxstrive.com
*/
public class UserEntity {
/** 用户ID */
private int id;
/** 姓名 */
private String name;
/** 年龄 */
private int age;
/** 电子邮件地址 */
private String email;
// 省略 setter 和 getter
}package com.hxstrive.springcloud.user.mapper;
import com.hxstrive.springcloud.user.entity.UserEntity;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
/**
* 用户 Mapper
* @author hxstrive.com
*/
@Mapper
public interface UserMapper {
@Select("select * from t_user where id=#{userId}")
UserEntity getUser(int userId);
}package com.hxstrive.springcloud.user.service;
import com.hxstrive.springcloud.user.entity.UserEntity;
import com.hxstrive.springcloud.user.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
* 用户服务
* @author hxstrive.com
*/
@Service
public class UserService {
@Autowired
private UserMapper userMapper;
public UserEntity getUser(int userId) {
return userMapper.getUser(userId);
}
}package com.hxstrive.springcloud.user.controller;
import com.hxstrive.springcloud.user.entity.UserEntity;
import com.hxstrive.springcloud.user.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* 用户 Controller
* @author hxstrive.com
*/
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/{id}")
public UserEntity getUser(@PathVariable("id") int id) {
System.out.println("## UserController.getUser() id=" + id);
return userService.getUser(id);
}
}package com.hxstrive.springcloud.user;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class UserApplication {
public static void main(String[] args) {
SpringApplication.run(UserApplication.class, args);
}
}当我们完成上面用户和订单服务的创建后，分别启动服务，此时查看 nacos，服务信息如下图：
使用浏览器验证服务：
（1）访问 http://localhost:8081/order/1 地址，获取订单信息，如下：
{
"id": 1,
"title": "海尔冰箱335升 法式多门四开门冰箱 一级能效 风冷无霜 双变频省电 节能净味 家用大容量超薄变温 多门推荐 BCD-335WLHFD9DS9",
"num": 1,
"price": 2598,
"userId": 1,
"user": {
"id": 1,
"name": "张珊",
"age": 27,
"email": "zhangs@gmail.com"
}
}注意，上面的 user 对象是通过 RestTemplate 接口调用从用户服务获得。
（2）访问 http://localhost:8082/user/1 地址，获取用户信息，如下：
{
"id": 1,
"name": "张珊",
"age": 27,
"email": "zhangs@gmail.com"
}
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