org.hibernate.exception.GenericJDBCException：私は私のJavaアプリケーションを実行する

Question

を挿入することができませんでした、問題は、以下のログと、そこにいます：

org.hibernate.exception.GenericJDBCException: could not insert: [com.abc.a.entity.Employee] 

at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140) 
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128) 
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) 
    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64) 
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2327) 
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2834) 
    at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71) 
    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273) 
    at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:320) 
    at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203) 
    at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129) 
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210) 
    at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56) 
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195) 
    at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50) 
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93) 
    at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713) 
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701) 
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697) 
    at com.ypd.a.entity.AppTest.testA(AppTest.java:33) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:289) 
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:114) 
    at org.junit.jupiter.engine.descriptor.MethodTestDescriptor.lambda$invokeTestMethod$7(MethodTestDescriptor.java:212) 
    at org.junit.jupiter.engine.execution.ThrowableCollector.execute(ThrowableCollector.java:40) 
    at org.junit.jupiter.engine.descriptor.MethodTestDescriptor.invokeTestMethod(MethodTestDescriptor.java:208) 
    at org.junit.jupiter.engine.descriptor.MethodTestDescriptor.execute(MethodTestDescriptor.java:155) 
    at org.junit.jupiter.engine.descriptor.MethodTestDescriptor.execute(MethodTestDescriptor.java:63) 
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$0(HierarchicalTestExecutor.java:80) 
    at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66) 
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:76) 
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$0(HierarchicalTestExecutor.java:87) 
    at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66) 
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:76) 
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$0(HierarchicalTestExecutor.java:87) 
    at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66) 
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:76) 
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:51) 
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:43) 
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:129) 
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:85) 
    at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:59) 
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51) 
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237) 
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) 
Caused by: java.sql.SQLException: Field 'id' doesn't have a default value 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1084) 
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4232) 
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4164) 
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2615) 
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2776) 
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2838) 
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2082) 
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2334) 
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2262) 
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2246) 
    at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:94) 
    at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:57) 
    ... 44 more 

あなたがで原因を参照してくださいに起因

：java.sql.SQLException：フィールド 'id'にはデフォルト値がありません

私のコードを確認しましたが、問題は全くありません。

なぜ私はこれを取得するのですか？

マイhibernate.cfg.xmlのは以下の通りです：

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE hibernate-configuration PUBLIC 
     "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
     "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration > 
    <session-factory> 
     <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
     <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test</property> 
     <property name="hibernate.connection.username">root</property> 
     <property name="hibernate.connection.password">root</property> 
     <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property> 

     <property name="hibernate.show_sql">true</property> 
     <property name="javax.persistence.validation.mode">none</property> 
     <mapping resource="Employee.hbm.xml"></mapping> 
    </session-factory> 

</hibernate-configuration> 

編集

テーブルを作成するSQL：

CREATE TABLE `t_employee` (
    `id` int(11) NOT NULL, 
    `emp_name` varchar(255) DEFAULT NULL, 
    `workDate` datetime DEFAULT NULL, 
    PRIMARY KEY (`id`) 
) ENGINE=InnoDB DEFAULT CHARSET=utf8 

Answer 1

は理由を見つけ、あなたはidを取得する必要がありますAUTO INCREMENT、ナビゲートしている場合は、以下の方法を簡単に追加できます。