hibernate一对多关系 添加A表后B表级联添加成功 怎么实现

A类：

@Entity

@Table(name="tablename")

public class A{

private int id

private String name

private String B//添加B的引用

}

@Id

@GeneratedValue

public int getId() {

return Id

}

public void setid(int Id) {

Id = Id

}

@OneToMany(cascade=CascadeType.ALL)

public String getB(){//自动生成get、set方法}

public void setB(String B){……}

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B类：

@Entity

@Table(name="tablename")

public class B{

private int id

private String name

private String A//添加B的引用，变成双向映射

}

@Id

@GeneratedValue

public int getId() {

return Id

}

public void setid(int Id) {

Id = Id

}

@ManyToOne(mappedBy="B",

cascade=CascadeType.ALL)

public String getA(){//自动生成get、set方法}

public void setA(String A){……}

我也初学，仅供参考呢

触发器方式： create trigger trg_A on A for update,delete as begin if exists(select 1 from inserted) update B set Name=(select Name from inserted) where Name=(select Name from deleted) else delete B where Name=(select Name from deleted) end go 要使用级联性更新和删除，用户可以在Alter TABLE 语句的CONSTRAINT子句中使用ON Update CASCADE 和/或 ON Delete CASCADE 关键字。注意他们都必须是应用于外键的。 级联更新和级联删除方式： Alter TABLE [dbo].[T_USERGROUP] ADD CONSTRAINT [FK_T_USERGROUP_T_ACCTTEMPLATE] FOREIGN KEY ( [ATNAME] ) REFERENCES [dbo].[T_ACCTTEMPLATE] ( [ATNAME] ) ON Update CASCADE ON Delete CASCADE

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