Question

我正在尝试使用嵌入式注释将一个对象中的不同值存储在一个表中。

我有两节课：为userDetails：

package org.hibernet.src;
@Entity
@Table (name="UserDetails")
 public class userDetails {
 @Id 
@GeneratedValue(strategy = GenerationType.AUTO)
private int userId;
@Temporal(TemporalType.DATE)
private Date dob;
public Date getDob() {
    return dob;
}
public void setDob(Date dob) {
    this.dob = dob;
}
private String userName;
@Embedded
private Address address;

public Address getAddress() {
    return address;
}
public void setAddress(Address address) {
    this.address = address;
}
public int getUserId() {
    return userId;
}
public void setUserId(int userId) {
    this.userId = userId;
}
public String getUserName() {
    return userName;
}
public void setUserName(String userName) {
    this.userName = userName;
}

}

可嵌入类的地址类：

 @Embeddable

 public class Address {

@Column(nullable=true)
private String street;

@Column(nullable=true)
private String city;

 @Column(nullable=true)
 private String state;


public String getStreet() {
return street;
}
public void setStreet(String street) {
this.street = street;
}
public String getCity() {
    return city;
}
 public void setCity(String city) {
    this.city = city;
 }
public String getState() {
return state;
}
public void setState(String state) {
    this.state = state;
}

} 这是我的主要课程：

public static void main(String[] args) {

userDetails user = new userDetails();
Address add = new Address();

user.setUserName("Dipesh");
user.setDob(new Time(0));
add.setCity("vadodara");
add.setState("gujarat");
add.setStreet("raopura");



SessionFactory sessionfactory = new     
 Configuration().configure().buildSessionFactory();
Session session = sessionfactory.openSession();
session.beginTransaction();
session.save(user);
session.save(add);
/*user = (userDetails)session.get(userDetails.class, 6);*/

session.getTransaction().commit();
session.close();

}

我试图存储数据，但它显示：

   ERROR: Field 'pincode' doesn't have a default value
   Exception in thread "main" org.hibernate.exception.GenericJDBCException:    
    could not execute statement

      at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:211)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3032)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3558)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:98)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:490)
at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:195)
at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:179)
at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:214)
at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:324)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:288)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:194)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:125)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)
at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:715)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:707)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:702)
at org.hibernate.test.userTest.main(userTest.java:36)
Caused by: java.sql.SQLException: Field 'pincode' doesn't have a default    
value
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1056)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3376)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3308)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1837)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1961)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2543)
at     
    com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1737)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2022)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1940)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1925)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:208)
... 22 more

我的地址中有密码，但是显示错误，所以我将其删除但仍显示错误。

请帮我解决。

Answer 1

数据库中的表有一个字段密码，您没有为其定义默认值且不可为空。但是，您的实体没有该字段的映射，并且您没有为此字段发送值。因此， java.sql.SQLException：Field＆＃39; pincode＆＃39;没有默认的值

Answer 2

1）调整您的实体，使其包含字段＆＃34; pincode＆＃34;

@Entity
@Table (name="UserDetails")
public class userDetails {
...
@Column(name="pincode", columnDefinition="Number(10) default '34562'")
int pincode;
...

2）或更改基础表，以便pincode字段具有默认值：

 ALTER TABLE user_details MODIFY pincode NUMBER(10) NULL DEFAULT NULL;

仅选择数字（10）作为示例。用可变类型的密码替换它。

Answer 3

我遇到与 org.hibernate.exception.GenericJDBCException相同的错误：无法执行语句，我忘记初始化会话工厂。

初始化（如下所示）会话工厂解决了我的问题。

@Autowired
private SessionFactory sessionFactory;

public void setSessionFactory(SessionFactory sessionFactory) {
    this.sessionFactory = sessionFactory;
}

org.hibernate.exception.GenericJDBCException：无法在hibernate中执行语句

3 个答案: