Question

UserBean Class

@Entity
@Table(name="users")
public class UserBean {

    @Id
    @GeneratedValue(strategy =GenerationType.AUTO)
    @Column(name="ID")
    private Integer id;

    @Column(name = "NAME")
    private String name;

    @Column(name = "EMAIL")
    private String email;

    @Column(name = "AGE")
    private int age;

    /**
     * @return the id
     */
    public Integer getId() {
        return id;
    }

    /**
     * @param id the id to set
     */
    public void setId(Integer id) {
        this.id = id;
    }

    /**
     * @return the name
     */
    public String getName() {
        return name;
    }

    /**
     * @param name the name to set
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * @return the email
     */
    public String getEmail() {
        return email;
    }

    /**
     * @param email the email to set
     */
    public void setEmail(String email) {
        this.email = email;
    }

    /**
     * @return the age
     */
    public int getAge() {
        return age;
    }

    /**
     * @param age the age to set
     */
    public void setAge(int age) {
        this.age = age;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append("UserBean [id=").append(id).append(", name=")
                .append(name).append(", email=").append(email).append(", age=")
                .append(age).append("]");
        return builder.toString();
    }

}

我正在 ORA：02289序列不存在

这是hibernate.cfg.xml

<hibernate-configuration>
    <session-factory>
        <mapping class="com.abc.bean.UserBean" />
    </session-factory>
</hibernate-configuration>

Dispatcher包扫描

<context:component-scan base-package="com.abc.controller" />
<context:component-scan base-package="com.abc.dao.impl" />
<mvc:annotation-driven />

我在另一台笔记本电脑上试过同样的东西而且它有效，是什么导致了这个问题？早些时候，我试图生成一个序列，但它并没有很好地运作

执行Sql命令： create table users(id int primary key,name varchar(20),email varchar(20),age int);

Answer 1

如果使用GenerationType.AUTO（默认全局序列名hibernate_sequence），则

hraclenate使用oracle db的序列。您应该创建序列并在实体映射中配置它，例如：

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "user_generator")
@SequenceGenerator(name="user_generator", sequenceName = "user_seq")
@Column(name="ID",allocationSize = 1)
private Integer id;

Answer 2

您使用的是哪个版本的Oracle？据我所知，11g中不支持自动增量，但12c支持自动增量..

使用hibernate Sequence的Spring MVC并不存在

2 个答案: