spring boot kotlin jpa的使用

实体类

@Entity
@Table(name = "user")
class User {

    @Id var host: String? = null
    @Column(name="user")   var user: String? = null
    @Column(name="selectPriv")    var selectPriv: String? = null
    @Column(name="insertPriv")    var insertPriv: String? = null
    @Column(name="updatePriv")    var updatePriv: String? = null
}

dao接口

interface UserRepository : JpaRepository<User, Long>

controller

@Controller
class Use{
    @Autowired
    private val userRepository: UserRepository? = null

    @GetMapping("test1")
    fun  test(model:Model):String{
            model.addAttribute("op",userRepository?.findAll())
        return "index"
    }
}

application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/mysql
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.jackson.serialization.indent-output=true