Question

我试图将简单的hibernate保存数据保存到我的表中，但我在控制台中有Transaction Exception，这是我的代码：

logging.java

@Entity
@Table(name = "Logging")
public class Logging implements Serializable {

    private int id;
    private String user;
    private String action;
    private Date date;

    @Column(name = "ID")
    @Id
    public int getId() {
        return id;
    }

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

    @Column(name = "USER_NAME")
    public String getUser() {
        return user;
    }

    public void setUser(String user) {
        this.user = user;
    }

    @Column(name = "action")
    public String getAction() {
        return action;
    }

    public void setAction(String action) {
        this.action = action;
    }

    @Column(name = "DATE")
    @Temporal(TemporalType.DATE)
    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

这就是我的插入方法：

public class BaseDAO {
    public SessionFactory factory;

    public Session session;

    public BaseDAO() {
        factory = new AnnotationConfiguration().configure(
                "hibernate.cfg.xml").buildSessionFactory();
    }

    public void save(Object obj) throws Throwable {
        session = factory.openSession();
        Transaction tx = null;

        tx = session.beginTransaction();
        session.save(obj);
        tx.commit();
    }

我的loginServlet，我保存了我的数据：

Logging loggingdto = new Logging ();
try {
    loggingdto.setId(1);
    loggingdto.setUser(loggedInUserDTO.getUserName());
    loggingdto.setAction("USER LOGGED IN");
    loggingdto.setDate(new Date());
    base.save(loggingdto);
} catch (Throwable e) {
    e.printStackTrace();
}

我在DB中的表

create table Logging(
id int not null,
user_name varchar(50) not null,
action varchar(50) not null,
Date date 
primary key (id)
);

控制台中出现的另一个问题是hibernate打印数据插入到表中但是顺序错误

Hibernate: insert into Logging (action, DATE, USER_NAME, ID) values (?, ?, ?, ?)

它应该是那样的

Hibernate: insert into Logging (id, user_name, action, date) values (?, ?, ?, ?)

当我检查表时我发现它是空的？

Answer 1

查询中指定的列名称与创建表和Logging.java文件有所不同。这就是你的控制台显示

的原因

_Hibernate: insert into Logging (action, DATE, USER_NAME, ID) values (?, ?, ?, ?)_

而不是 _Hibernate：插入Logging（id，user_name，action，date）值（？，？，？，？）_

hibernate中的事务异常

1 个答案: