微服务
1.不同的微服务，不要重复开发相同的业务
2.微服务数据独立，不要访问其它微服务的数据库。
3.微服务可以将自己的业务暴露为接口，供其它微服务调用。
实现
开发环境
- 开发工具：IntelliJ IDEA 2023.2.5 Ultimate
- 开发框架：Spring boot 3.0.9
- 语言：Java 21
- 微服务框架：Spring cloud 2022.0.4
- 数据库：mysql5.7.4
- 持久层框架：mybatis3.0.3
- Java增强工具：lombok 1.18.30
构建工程
1. 创建父工程
使用"Spring Initializr"构建Spring boot项目cloud-service。
删除其他不必要的文件，只留"pom.xml"文件。
pom.xml
<?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>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.0.9</version>
<relativePath/>
</parent>
<packaging>pom</packaging>
<modules>
<module>user-service</module>
<module>order-service</module>
<module>eureka-server</module>
</modules>
<groupId>cn.zyz</groupId>
<artifactId>cloud-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>cloud-service</name>
<description>cloud-service</description>
<properties>
<java.version>21</java.version>
<spring-cloud.version>2022.0.4</spring-cloud.version>
<lombok.version>1.18.30</lombok.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>3.0.3</version>
</dependency>
<dependency>
<groupId>com.mysql</groupId>
<artifactId>mysql-connector-j</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter-test</artifactId>
<version>3.0.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
packaging：表示打包方式为pom
modules：表示包含的子模块
dependencies：父工程中此处的依赖都会被子模块继承
dependencyManagement：表示此处依赖不被子模块继承
groupId：子模块和父工程相同时，子模块中无需指定
2. 用户微服务
用户微服务：user-service
2.1 构建子模块
右击"父工程"->"New Module"->"New Module"
2.2 配置
application.yml
server:
port: 8081
spring:
datasource:
url: jdbc:mysql://localhost:3306/cloud_user?useSSL=false&serverTimezone=Asia/Shanghai
username: root
password: root
application:
name: userservice
2.3 实体类
cn.zyz.user.pojo.User
@Data
public class User {
private int id;
private String username;
private String address;
}
2.4 DAO
cn.zyz.user.mapper.UserMapper
@Mapper
public interface UserMapper {
@Select("select * from tb_user where id=#{id}")
public User getUser(int id);
}
2.5 服务类
cn.zyz.user.service.UserService
@Service
public class UserService {
@Autowired
private UserMapper userMapper;
public User getUser(int id){
return userMapper.getUser(id);
}
}
2.6 控制器类
cn.zyz.user.web
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/{id}")
public User getUser(@PathVariable int id) {
User user = userService.getUser(id);
System.out.println(user);
return user;
}
}
3.订单微服务
订单微服务：order-service
标签：service,Spring,boot,Cloud,user,spring,id,cloud From： https://www.cnblogs.com/beast-king/p/17864168.html