8-Spring Boot ( 整合使用mybatis )

最新推荐文章于 2024-08-10 08:45:53 发布

lizhen1114

最新推荐文章于 2024-08-10 08:45:53 发布

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本文详细介绍如何在Spring Boot项目中整合JPA进行数据库操作。包括pom文件配置依赖、创建User实体类、定义UserDao接口、实现IndexController控制器及项目启动流程。

1.pom文件引入依赖

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>

2.创建User实体类

@Entity(name = "users")
public class User {
@Id
@GeneratedValue
private Integer id;
@Column
private String name;
@Column
private Integer age;
// ..get/set方法
}

3.创建UserDao

public interface UserDao extends JpaRepository<User, Integer> {
}

4. 创建IndexController

@RestController
public class IndexController {
@Autowired
private UserDao userDao;
@RequestMapping("/index")
public String index(Integer id) {
User findUser = userDao.findOne(id);
System.out.println(findUser.getName());
return "success";
}
}

5. 启动项目

@ComponentScan(basePackages = { "com.itmayiedu" })
@EnableJpaRepositories(basePackages = "com.itmayiedu.dao")
@EnableAutoConfiguration
@EntityScan(basePackages = "com.itmayiedu.entity")
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}