当我试图使用hibernate运行这个java代码时,会收到以下错误消息:
create table EMPLOYEE (
ID integer not null,
JOINING_DATE date not null,
NAME varchar(50) not null,
SALARY decimal(10,2) not null,
SSN varchar(255) not null,
primary key (ID)
)
下面将提到我的Java代码,并使用hibernate,我需要在DB中插入值。
@Entity
@Table(name=
这是我的源代码:https://github.com/Incybro/Spring-Blog在启动我的应用程序时出现了一个问题:“创建类路径资源中定义的名为'entityManagerFactory‘的bean时出错”。这里发生什么事情? Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-06-27 13:38:07.408 ERROR 2292 --- [ ma
从数据库加载数据时获取以下错误
java.lang.IllegalStateException: Required identifier property not found for class com.sudhirt.practice.springdatajdbcpractice.entity.AuthorRef!
at org.springframework.data.mapping.PersistentEntity.getRequiredIdProperty(PersistentEntity.java:105)
at org.springframework.data.j
我收到了Hibernate异常,就像标题一样。我发现最常见的问题是实体没有列在hibernate配置文件中。但在我的例子中,我已经在hibernate配置文件中输入了类名。
下面是我的代码片段:
Jenis.java
@Entity
@Table(name = "JENIS", schema = "APP")
public class Jenis implements java.io.Serializable {
private int id;
private int cloudid;
private String nama_jenis;
private Li
我正在尝试将Spring服务器从2.6.8升级到2.7.0,在运行测试时,我得到了2.6.8中没有出现的以下异常:
org.springframework.orm.ObjectOptimisticLockingFailureException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1; statement executed: delete from account where id=?; nested exception is org.hiberna
如何在MySQL中增加主键而不检查自动增量?
我的例子:
Tax.java
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package newpackage;
import java.io.Serializable;
import java.math.BigDecimal;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Log
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.A
有重复的条目,但我想为同一个学生插入两个笔记本电脑数据。我是hibernate的初学者,先生,请指导我。
Exception in thread "main" org.hibernate.exception.ConstraintViolationException: could not execute statement
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:72)
at org.hibernate.exception.
我试图创造这样的情况:用户
所以我去上课了
public class User implements UserDetails {
@Id
private String username;
(...)
@OneToMany(targetEntity=RateAth.class, mappedBy="user", cascade=CascadeType.ALL)
List<RateAth> authorRates
public class Author {
@Id
pr
我在当前项目中添加了Room数据库代码,在添加注释@Database之后,我得到了绑定错误。但是如果注释@Database,一切都正常工作。
我的数据库类
@Database(entities = Filter.class, version = 1, exportSchema = false)
public abstract class TestDb extends RoomDatabase {
abstract public FilterDao filterDao();
}
Dao
@Dao
public interface FilterDao {
@Insert(onCon
我在可嵌入类Leaverequest中有一个名为Leaverequest的实体。我在实体类中使用Collectionofelements,但是我得到了以下异常。有人能解释一下这是什么意思吗?
异常
Caused by: java.sql.BatchUpdateException: Duplicate entry '1-\x01' for key 'PRIMARY'
at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:2028)
at com