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jpa 分布式主键

 

相关注解

@Target({ElementType.PACKAGE, ElementType.TYPE, ElementType.METHOD, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Repeatable(GenericGenerators.class)
public @interface GenericGenerator {
    String name();

    String strategy();

    Parameter[] parameters() default {};
}


*************************************

@Target({ElementType.METHOD, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface GeneratedValue {
    GenerationType strategy() default GenerationType.AUTO;

    String generator() default "";
}

 

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使用示例

 

@Entity
public class Teacher {
    private String id;
    private String name;
    private Integer age;

    @Id
    @Column(name = "id")
    @GenericGenerator(name="uuid",strategy = "org.hibernate.id.UUIDGenerator")
    @GeneratedValue(generator = "uuid")
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    @Basic
    @Column(name = "name")
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Basic
    @Column(name = "age")
    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    。。。。

}

***************************************************

controller层

@RestController
public class TeacherController {

    @Autowired
    private TeacherRepository teacherRepository;

    @RequestMapping("/save")
    public String save(){
        for(int i=0;i<100;i++){
            Teacher teacher=new Teacher();
            teacher.setName("瓜田李下"+i);
            teacher.setAge(i);

            teacherRepository.save(teacher);
        }

        return "success";
    }
}

 

插入结果：