Java Spring数据jpa:批插入不工作

我用它为我的一个实体用spring数据jpa实现批插入。我使用的是mssqldb

我将主键生成策略从

GenerationType.IDENTITY

更改为

GenerationType.SEQUENCE

：

@Entity
@Table(name = "Answers")
public class AnswerDMO implements java.io.Serializable {
    private static final long serialVersionUID = 1L;
    private long id;
    
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "answer_new_generator")
    @SequenceGenerator(name = "answer_new_generator", sequenceName = "answer_new_sequence", allocationSize = 15)
    @Column(name = "Id", unique = true, nullable = false)
    public long getId() {
        return this.id;
    }
    public void setId(long id) {
        this.id = id;
    }

服务方法通过调用

list save（Iterable entities）保存应答实体列表：

休眠查询：

08:02:35,739 INFO  [stdout] (default task-1) Hibernate: 
08:02:35,740 INFO  [stdout] (default task-1)     select
08:02:35,742 INFO  [stdout] (default task-1)         next value for supplemental_answer_new_sequence

08:02:57,941 INFO  [stdout] (default task-1) Hibernate: 
08:02:57,941 INFO  [stdout] (default task-1)          insert 
08:02:57,941 INFO  [stdout] (default task-1)         into
08:02:57,941 INFO  [stdout] (default task-1)             my_schema.dbo.Answers
08:02:57,941 INFO  [stdout] (default task-1)             (CreatedDate, InstanceId, ProfileId, QuestionId, UpdatedDate, Value, Id) 
08:02:57,941 INFO  [stdout] (default task-1)         values
08:02:57,941 INFO  [stdout] (default task-1)             (?, ?, ?, ?, ?, ?, ?)

Q1：有人能告诉我为什么它不起作用吗

Q2：另外，在我从
GenerationType.IDENTITY
切换到
GenerationType.SEQUENCE
之后，我开始在日志中发现以下异常：

[jdbc.spi.SqlExceptionHelper] – SQL Error: 544, SQLState: S0001
[jdbc.spi.SqlExceptionHelper] – Cannot insert explicit value for identity column in table 'Answers' when IDENTITY_INSERT is set to OFF.

是因为
id
列具有
identity
属性吗？如果是，解决的步骤是什么

更新：我刚刚注意到我有一个错误的属性名
5
，应该是
5

所以现在的主要问题是

[jdbc.spi.SqlExceptionHelper] – SQL Error: 544, SQLState: S0001
[jdbc.spi.SqlExceptionHelper] – Cannot insert explicit value for identity column in table 'Answers' when IDENTITY_INSERT is set to OFF.

有什么办法可以解决吗？
我面临着完全相同的问题。问题在于，在JPA创建的表中，ID列被标记为标识列和标识列
结果MSSql服务器阻止了JPA生成的insert语句中这些ID列的exlpicit值。
另一个有趣的事实是，如果您已经通过IntelliJ数据库功能创建了“有问题”的表，并且已经注释了ID
列作为主键并自动递增，然后它也被标记为标识列。因此，解决方案如下：

右键单击“有问题”表->SQL脚本->生成DDL到查询控制台
放下桌子
从生成的查询中删除“identity”关键字
执行修改后的查询
重新启动数据库中的序列：ALTER sequence answer_new_sequence Restart WITH 1
我强烈建议allocationSize值与hibernate.hibernate.jdbc.batch_size值匹配，因为这将导致最小值
从序列中传递的值。此外，allocationSize必须与数据库中序列的步骤相匹配。
希望这能有所帮助。
干杯
08:02:35,739 INFO  [stdout] (default task-1) Hibernate: 
08:02:35,740 INFO  [stdout] (default task-1)     select
08:02:35,742 INFO  [stdout] (default task-1)         next value for supplemental_answer_new_sequence

08:02:57,941 INFO  [stdout] (default task-1) Hibernate: 
08:02:57,941 INFO  [stdout] (default task-1)          insert 
08:02:57,941 INFO  [stdout] (default task-1)         into
08:02:57,941 INFO  [stdout] (default task-1)             my_schema.dbo.Answers
08:02:57,941 INFO  [stdout] (default task-1)             (CreatedDate, InstanceId, ProfileId, QuestionId, UpdatedDate, Value, Id) 
08:02:57,941 INFO  [stdout] (default task-1)         values
08:02:57,941 INFO  [stdout] (default task-1)             (?, ?, ?, ?, ?, ?, ?)

[jdbc.spi.SqlExceptionHelper] – SQL Error: 544, SQLState: S0001
[jdbc.spi.SqlExceptionHelper] – Cannot insert explicit value for identity column in table 'Answers' when IDENTITY_INSERT is set to OFF.

[jdbc.spi.SqlExceptionHelper] – SQL Error: 544, SQLState: S0001
[jdbc.spi.SqlExceptionHelper] – Cannot insert explicit value for identity column in table 'Answers' when IDENTITY_INSERT is set to OFF.