hibernate 5.2.2（實體註釋）+ mysql，在eclipse上的第一個例子

我發現找到一個清晰的工作示例和一個很好的指南很困難，所以我嘗試一步一步熟悉這些技術。hibernate 5.2.2（實體註釋）+ mysql，在eclipse上的第一個例子

我需要澄清我無法正確地運行程序，和可能的解決方案能夠運行這樣的代碼：

1）我的目錄和圖書館的打印輸出： eclipse project

2）這是SRC/hibernate.cfg.xml中的代碼：

<hibernate-configuration> 
<session-factory> 
<property name="connection.driver_class">com.mysql.jdbc.Driver</property> 
<property name="connection.url">jdbc:mysql://localhost:3306/prva?useSSL=false</property> 
<property name="connection.username">root</property> 
<property name="connection.password">root</property> 

<property name="connection.pool_size">1</property> 
<property name="dialect">org.hibernate.dialect.MySQLDialect</property> 
<property name="current_session_context_class">thread</property> 

<!-- note: rimbalza Echo SQLquery su stdoout --> 
<property name="show_sql">true</property> 


</session-factory> 
</hibernate-configuration>

3）此爲src /包/ Student.java的代碼：（該持久類）

package pk; 

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.Table; 

@Entity 
@Table(name="student") 
public class Student { 

    @Id 
    @GeneratedValue(strategy=GenerationType.IDENTITY) 
    @Column(name="id") 
    private int id; 

    @Column(name="first_name") 
    private String firstName; 

    @Column(name="last_name") 
    private String lastName; 

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

    public Student() { 

    } 

    public Student(String firstName, String lastName, String email) { 
     this.firstName = firstName; 
     this.lastName = lastName; 
     this.email = email; 
    } 

    public int getId() { 
     return id; 
    } 

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

    public String getFirstName() { 
     return firstName; 
    } 

    public void setFirstName(String firstName) { 
     this.firstName = firstName; 
    } 

    public String getLastName() { 
     return lastName; 
    } 

    public void setLastName(String lastName) { 
     this.lastName = lastName; 
    } 

    public String getEmail() { 
     return email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 

    @Override 
    public String toString() { 
     return "Student [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", email=" + email + "]"; 
    } 

}

4）此爲src /包/ Play.java的代碼：（與主及使用學生的）

package pk; 

import org.hibernate.Session; 
import org.hibernate.SessionFactory; 
import org.hibernate.cfg.Configuration; 

public class Play { 

    public static void main(String[] args) { 
     SessionFactory factory = new Configuration() 
             .configure() 
             .addAnnotatedClass(Student.class) 
             .buildSessionFactory(); 

     Session session=factory.getCurrentSession(); 

     try{ 
      Student tempStudent = new Student("Carl","Dred","[email protected]"); 
      session.beginTransaction(); 
      session.save(tempStudent); 
      session.getTransaction().commit(); 
      tempStudent.toString(); 
     }finally{ 
      factory.close(); 
     } 
    } 
}

5）這是該消息控制檯：

Sep 01, 2016 3:32:02 PM org.hibernate.Version logVersion 
INFO: HHH000412: Hibernate Core {5.2.2.Final} 
Sep 01, 2016 3:32:03 PM org.hibernate.cfg.Environment <clinit> 
INFO: HHH000206: hibernate.properties not found 
Sep 01, 2016 3:32:03 PM org.hibernate.cfg.Environment buildBytecodeProvider 
INFO: HHH000021: Bytecode provider name : javassist 
Sep 01, 2016 3:32:03 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit> 
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final} 
Sep 01, 2016 3:32:03 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!) 
Sep 01, 2016 3:32:03 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 
INFO: HHH10001005: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/prva?useSSL=false] 
Sep 01, 2016 3:32:03 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 
INFO: HHH10001001: Connection properties: {user=root, password=****} 
Sep 01, 2016 3:32:03 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 
INFO: HHH10001003: Autocommit mode: false 
Sep 01, 2016 3:32:03 PM org.hibernate.engine.jdbc.connections.internal.PooledConnections <init> 
INFO: HHH000115: Hibernate connection pool size: 1 (min=1) 
Sep 01, 2016 3:32:04 PM org.hibernate.dialect.Dialect <init> 
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect 
Hibernate: insert into student (email, first_name, last_name, id) values (?, ?, ?, ?) 
Sep 01, 2016 3:32:06 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions 
WARN: SQL Error: 1146, SQLState: 42S02 
Sep 01, 2016 3:32:06 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions 
ERROR: Table 'prva.student' doesn't exist 
Sep 01, 2016 3:32:06 PM org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl release 
INFO: HHH000010: On release of batch it still contained JDBC statements 
Sep 01, 2016 3:32:06 PM org.hibernate.internal.ExceptionMapperStandardImpl mapManagedFlushFailure 
ERROR: HHH000346: Error during managed flush [org.hibernate.exception.SQLGrammarException: could not execute statement] 
Sep 01, 2016 3:32:06 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop 
INFO: HHH10001008: Cleaning up connection pool [jdbc:mysql://localhost:3306/prva?useSSL=false] 
Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute statement 
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:147) 
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:155) 
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:162) 
    at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1411) 
    at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:475) 
    at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3168) 
    at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2382) 
    at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:467) 
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:146) 
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38) 
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:220) 
    at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:68) 
    at pk.Play.main(Play.java:27) 
Caused by: org.hibernate.exception.SQLGrammarException: could not execute statement 
    at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:63) 
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) 
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111) 
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97) 
    at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:207) 
    at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:45) 
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2934) 
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3434) 
    at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:89) 
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:582) 
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:456) 
    at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337) 
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39) 
    at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1405) 
    ... 9 more 
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'prva.student' doesn't exist 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) 
    at java.lang.reflect.Constructor.newInstance(Unknown Source) 
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:404) 
    at com.mysql.jdbc.Util.getInstance(Util.java:387) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:942) 
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3966) 
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3902) 
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2526) 
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2673) 
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2549) 
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1861) 
    at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2073) 
    at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2009) 
    at com.mysql.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:5098) 
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1994) 
    at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204) 
    ... 18 more

來源

2016-09-01 Francesco

好像你還沒有創建數據庫表... 添加<property name="hbm2ddl.auto" value="create"/>到hibernate.cfg.xml文件。

來源

2016-09-01 14:35:28

是的，我還沒有創建此表！我嘗試的代碼，但控制檯給我這個： Sep 01，2016 4:50:39 PM org.hibernate.cfg.Environment 信息：HHH000206：hibernate.properties找不到 Sep 01，2016 4:50： 39 PM org.hibernate.cfg.Environment buildBytecodeProvider ...（我必須剪掉，我不能給這麼大的重播） – Francesco

你可以看看http://docs.jboss.org/hibernate/orm/ 5.1/userguide/html_single/Hibernate_User_Guide.html＃configurations-hbmddl以查看「hibernate.hbm2ddl.auto」選項的不同值 –

我看到您的控制檯，表「學生」不存在。錯誤：表「prva.student」不存在

來源

2016-09-01 14:34:48

這應該是一個評論，它並不真正提供解決方案。 –

對不起，我也應該提供解決方案，但是我看到你已經給出瞭解決方案 –

如果我創建表和各個列，過程發生，如何請求數據庫中的各種實體是從休眠動態生成的？ – Francesco

hibernate 5.2.2（實體註釋）+ mysql，在eclipse上的第一個例子

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