为测试方便,使用内嵌数据库h2
1.创建user表
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user`
(
id BIGINT NOT NULL COMMENT '主键ID',
name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
age INT NULL DEFAULT NULL COMMENT '年龄',
email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
PRIMARY KEY (id)
);
2.插入初始化数据
DELETE FROM `user`;
INSERT INTO `user` (id, name, age, email) VALUES
(1, 'Jone', 18, 'test1@baomidou.com'),
(2, 'Jack', 20, 'test2@baomidou.com'),
(3, 'Tom', 28, 'test3@baomidou.com'),
(4, 'Sandy', 21, 'test4@baomidou.com'),
(5, 'Billie', 24, 'test5@baomidou.com');
3.创建springboot工程
使用 Spring Initializer (opens new window)快速初始化一个 Spring Boot 工程
4.添加依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5+ 版本</version>
<relativePath/>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>最新版本</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
5.配置数据源
在 application.yml 配置文件中添加 H2 数据库的相关配置:
# DataSource Config
spring:
datasource:
driver-class-name: org.h2.Driver
username: root
password: test
sql:
init:
schema-locations: classpath:db/schema-h2.sql
data-locations: classpath:db/data-h2.sql
6.springboot启动类
@SpringBootApplication
@MapperScan("com.baomidou.mybatisplus.samples.quickstart.mapper")
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
7.实体类
编写实体类 User.java(此处使用了 Lombok (opens new window)简化代码)
@Data
@TableName("`user`")
public class User {
private Long id;
private String name;
private Integer age;
private String email;
}
8.mapper
public interface UserMapper extends BaseMapper<User> {
}
9.测试类
@SpringBootTest
public class SampleTest {
@Autowired
private UserMapper userMapper;
@Test
public void testSelect() {
System.out.println(("----- selectAll method test ------"));
List<User> userList = userMapper.selectList(null);
Assert.isTrue(5 == userList.size(), "");
userList.forEach(System.out::println);
}
}
10.控制台日志
User(id=1, name=Jone, age=18, email=test1@baomidou.com)
User(id=2, name=Jack, age=20, email=test2@baomidou.com)
User(id=3, name=Tom, age=28, email=test3@baomidou.com)
User(id=4, name=Sandy, age=21, email=test4@baomidou.com)
User(id=5, name=Billie, age=24, email=test5@baomidou.com)
完整代码
mybatis-plus-samples/mybatis-plus-sample-quickstart at master · baomidou/mybatis-plus-samples · GitHub