SpringBoot集成JPA的示例代码

  <!--springboot的必须依赖-->  <parent>    <groupId>org.springframework.boot</groupId>    <artifactId>spring-boot-starter-parent</artifactId>    <version>1.5.9.RELEASE</version>  </parent>  <dependencies>    <!--启动springmvc的相关配置,springboot的自动配置-->    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter-web</artifactId>    </dependency>    <!--jpa-->    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter-data-jpa</artifactId>    </dependency>    <!--mysql驱动-->    <dependency>      <groupId>mysql</groupId>      <artifactId>mysql-connector-java</artifactId>    </dependency>  </dependencies>

import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class Application {  public static void main(String[] args) {    SpringApplication.run(Application.class,args);  }}

#建立/更新数据表的配置spring.jpa.hibernate.ddl-auto=update#数据库地址spring.datasource.url=jdbc:mysql://localhost:3306/qian?useUnicode=true&characterEncoding=utf-8#数据库用户名spring.datasource.username=root#数据库密码spring.datasource.password=123

import org.hibernate.annotations.GenericGenerator;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;/** * Created by Andy on 2018/1/20. *///表明这是个需要生成数据表的类@Entitypublic class User {//  定义主键id  @Id//  声明一个策略通用生成器，name为”system-uuid”,策略strategy为”uuid”。  @GenericGenerator(name = "system-uuid", strategy ="uuid")//  用generator属性指定要使用的策略生成器。  @GeneratedValue(generator = "system-uuid")  private String id;  private String name;  private Integer age;  private Boolean sex;  public String getId() {    return id;  }  public void setId(String id) {    this.id = id;  }  public String getName() {    return name;  }  public void setName(String name) {    this.name = name;  }  public Integer getAge() {    return age;  }  public void setAge(Integer age) {    this.age = age;  }  public Boolean getSex() {    return sex;  }  public void setSex(Boolean sex) {    this.sex = sex;  }}

@NoRepositoryBeanpublic interface CrudRepository<T, ID extends Serializable> extends Repository<T, ID> {  <S extends T> S save(S var1);  <S extends T> Iterable<S> save(Iterable<S> var1);  T findOne(ID var1);  boolean exists(ID var1);  Iterable<T> findAll();  Iterable<T> findAll(Iterable<ID> var1);  long count();  void delete(ID var1);  void delete(T var1);  void delete(Iterable<? extends T> var1);  void deleteAll();}

public interface UserRepository extends CrudRepository<User, String> {}

@RestControllerpublic class UserController {  @Autowired  private UserRepository userRepository;  @RequestMapping("/add")  public User add(String name){    User user = new User();    user.setName(name);    return userRepository.save(user);  }  @RequestMapping("/list")  public Iterable<User> list(){    Iterable<User> all = userRepository.findAll();    return all;  }}