1.pom引入依賴

<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>
 

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

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

@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";
	}
}
 

@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);
	}
}