Hibernate：实体不会被persist（）函数中的数据库推入

我是hibernate世界的新手，准备演示示例。我试着用entityManager.persist（entity）函数。没有错误，但实体没有保存到数据库中。Hibernate：实体不会被persist（）函数中的数据库推入

这是我的persistence.xml文件...

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence 
    http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"> 

    <persistence-unit name="NCLPEntity"> 

     <provider>org.hibernate.ejb.HibernatePersistence</provider> 

     <!-- 
     <jta-data-source>nclp/oracle</jta-data-source> 
     --> 

     <class>com.fks.nclp.model.MapRoleModule</class> 
     <class>com.fks.nclp.model.MstCityDtl</class> 
     <class>com.fks.nclp.model.MstClpMcDtl</class> 
     <class>com.fks.nclp.model.MstDiscSlbDtl</class> 
     <class>com.fks.nclp.model.MstFormatDtl</class> 
     <class>com.fks.nclp.model.MstGeneralDtl</class> 
     <class>com.fks.nclp.model.MstMediaType</class> 
     <class>com.fks.nclp.model.MstModuleDtl</class> 
     <class>com.fks.nclp.model.MstRoleDtl</class> 
     <class>com.fks.nclp.model.MstSiteDtl</class> 
     <class>com.fks.nclp.model.MstStateDtl</class> 
     <class>com.fks.nclp.model.MstUserDtl</class> 

     <properties>   
      <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" /> 
      <property name="hibernate.connection.driver_class" value="oracle.jdbc.driver.OracleDriver"/> 
      <property name="hibernate.connection.url" value="jdbc:oracle:thin:@10.0.7.62:1521:CLP"/> 
      <property name="hibernate.default_schema" value="clp_orcl_db"/> 
      <property name="hibernate.connection.username" value="CLPREM"/> 
      <property name="hibernate.connection.password" value="********"/>   
      <property name="hibernate.show_sql" value="true"/> 
      <property name="hibernate.format_sql" value="false"/> 
      <property name="hibernate.query.factory_class" value="org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory"/> 
      <property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider"/> 
      <property name="hibernate.cache.use_second_level_cache" value="false"/> 
      <property name="hibernate.order_inserts" value="true"/> 
      <property name="hibernate.order_updates" value="true"/> 
      <property name="hibernate.jdbc.batch_size" value = "30" />      
     </properties> 
    </persistence-unit> 
</persistence>

这里是从那里我测试的持续功能存根...

package com.fks.nclp.junit; 

import java.math.BigDecimal; 

import javax.persistence.EntityManager; 
import javax.persistence.EntityManagerFactory; 
import javax.persistence.Persistence; 

import com.fks.nclp.model.MstStateDtl; 

public class Test_1 { 

    public static void main(String a[]){ 
     EntityManagerFactory emf = Persistence.createEntityManagerFactory("NCLPEntity"); 
     EntityManager em = emf.createEntityManager(); 

     MstStateDtl state = new MstStateDtl(); 
     state.setStateId(1002); 
     state.setZoneId(new BigDecimal("1234")); 
     state.setDescription("testing");   

     em.persist(state); 
     em.close(); 
     emf.close(); 
    } 
}

这里是控制台outout。 ..

May 22, 2012 5:43:40 PM org.hibernate.annotations.common.Version <clinit> 
INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final} 
May 22, 2012 5:43:40 PM org.hibernate.Version logVersion 
INFO: HHH000412: Hibernate Core {4.1.1} 
May 22, 2012 5:43:40 PM org.hibernate.cfg.Environment <clinit> 
INFO: HHH000206: hibernate.properties not found 
May 22, 2012 5:43:40 PM org.hibernate.cfg.Environment buildBytecodeProvider 
INFO: HHH000021: Bytecode provider name : javassist 
May 22, 2012 5:43:41 PM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
INFO: HHH000402: Using Hibernate built-in connection pool (not for production use!) 
May 22, 2012 5:43:41 PM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
INFO: HHH000115: Hibernate connection pool size: 20 
May 22, 2012 5:43:41 PM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
INFO: HHH000006: Autocommit mode: true 
May 22, 2012 5:43:41 PM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
INFO: HHH000401: using driver [oracle.jdbc.driver.OracleDriver] at URL [jdbc:oracle:thin:@10.0.7.62:1521:CLP] 
May 22, 2012 5:43:41 PM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
INFO: HHH000046: Connection properties: {user=CLPREM, password=****, autocommit=true, release_mode=auto} 
May 22, 2012 5:43:42 PM org.hibernate.dialect.Dialect <init> 
INFO: HHH000400: Using dialect: org.hibernate.dialect.Oracle10gDialect 
May 22, 2012 5:43:42 PM org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation 
INFO: HHH000424: Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException 
May 22, 2012 5:43:42 PM org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService 
INFO: HHH000268: Transaction strategy: org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory 
May 22, 2012 5:43:42 PM org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init> 
INFO: HHH000397: Using ASTQueryTranslatorFactory 
May 22, 2012 5:43:42 PM org.hibernate.validator.util.Version <clinit> 
INFO: Hibernate Validator 4.1.0.Final 
May 22, 2012 5:43:42 PM org.hibernate.validator.engine.resolver.DefaultTraversableResolver detectJPA 
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver. 
May 22, 2012 5:43:42 PM org.hibernate.validator.engine.resolver.DefaultTraversableResolver detectJPA 
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver. 
May 22, 2012 5:43:43 PM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop 
INFO: HHH000030: Cleaning up connection pool [jdbc:oracle:thin:@10.0.7.62:1521:CLP]

Thax，Gunjan。

来源

2012-05-22 Gunjan Shah

您必须在开始时开始事务，并在最后提交事务。

public static void main(String args[]) 
    { 
     EntityManager em; 
     try 
     { 
      em = Persistence.createEntityManagerFactory(
      "NCLPEntity").createEntityManager(); 

     em.getTransaction().begin(); 


     MstStateDtl state = new MstStateDtl(); 
     state.setStateId(1002); 
     state.setZoneId(new BigDecimal("1234")); 
     state.setDescription("testing"); 
     em.persist(state); 

     em.getTransaction().commit(); 

     } 
     finally 
     { 
     if (em != null) 
      em.close(); 
     } 
    }

来源

2012-05-22 12:49:30 Ilya

您永远不会刷新您的EntityManager。您也没有任何实际的交易。

EntityManager em = emf.createEntityManager(); 
em.getTransaction().begin(); 

MstStateDtl state = new MstStateDtl(); 
state.setStateId(1002); 
state.setZoneId(new BigDecimal("1234")); 
state.setDescription("testing");   
em.persist(state); 
em.getTransaction().commit(); // performs an implicit flush 

em.close();

来源

2012-05-22 12:47:58

Hibernate：实体不会被persist（）函数中的数据库推入

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