SpringBoot集成JPA的示例代码

  
  
    org.springframework.boot
    spring-boot-starter-parent
    1.5.9.RELEASE
  

  
    
    
      org.springframework.boot
      spring-boot-starter-web
    
    
    
      org.springframework.boot
      spring-boot-starter-data-jpa
    
    
    
      mysql
      mysql-connector-java
    
  

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public 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
@Entity
public 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;
  }
}

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

public interface UserRepository extends CrudRepository {

}

@RestController
public 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 list(){
    Iterable all = userRepository.findAll();
    return all;
  }
}