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代码没有错误 junit报错

java.lang.NullPointerException

at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.getConnection(DriverManagerConnectionProviderImpl.java:214)

at org.hibernate.engine.jdbc.internal.JdbcServicesImpl$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcServicesImpl.java:242)

at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:117)

at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)

at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)

at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)

at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1818)

at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1776)

at com.TestStudents.TestSchemaExport(TestStudents.java:20)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)

at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)

at org.junit.runners.ParentRunner.run(ParentRunner.java:236)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)


发呆发呆

2016-11-30

源自：使用Struts2+Hibernate开发学生信息管理功能  1-6

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6 回答

王刘奇 回答被采纳 +3 积分
2016-11-30

我好想知道了  你实体类中 是不是忘记定义无参的构造方法。还不对的话 把你的发过来我看看 QQ1414044032

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#1

发呆发呆 提问者

非常感谢！
2016-12-01 回复 有任何疑惑可以回复我~
王刘奇
2016-12-01

你的配置<property name="hibernate.connection.url">jdbc:mysql:///test?useUnicode=true&amp;characterEncoding=UTF-8</property> 你端口默认应该是3306 你妹设置，还有localhost本地也没设置

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2016-11-30

org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister

at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:185)

at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135)

at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:385)

at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1790)

at com.TestStudents.TestSchemaExport(TestStudents.java:20)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)

at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)

at org.junit.runners.ParentRunner.run(ParentRunner.java:236)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]

at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:138)

at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:188)

at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:341)

at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:507)

at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:146)

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 org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163)

... 27 more

Caused by: java.lang.reflect.InvocationTargetException

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 org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:135)

... 36 more

Caused by: org.hibernate.PropertyNotFoundException: Could not find a getter for gender in class com.Students

at org.hibernate.property.BasicPropertyAccessor.createGetter(BasicPropertyAccessor.java:316)

at org.hibernate.property.BasicPropertyAccessor.getGetter(BasicPropertyAccessor.java:310)

at org.hibernate.mapping.Property.getGetter(Property.java:321)

at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:444)

at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:200)

at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:82)

... 41 more


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发呆发呆 提问者
2016-11-30

<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

<property name="hibernate.connection.url">jdbc:mysql:///test?useUnicode=true&amp;characterEncoding=UTF-8</property>

<property name="hibernate.connection.username">root</property>

<property name="hibernate.connection.password"> root</property>

<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>


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王刘奇
2016-11-30

<!-- hibernate连接数据库基本信息 -->

<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

      <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/struts2?useUnicode=true&amp;characterEncoding=utf8</property>

<property name="hibernate.connection.username">你自己的</property>

<property name="hibernate.connection.password"> 你自己的</property>

<!-- hibernate配置数据库方言 -->

<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>


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#1

发呆发呆 提问者

我的xml中代码跟视频一样，都是差不多的，也用了你的，junit错误更多了...我把我的代码和错误都发在下面了。
2016-11-30 回复 有任何疑惑可以回复我~
王刘奇
2016-11-30

驱动的问题 ，链接没获取到把，你检查你的，xml文件，写驱动的那个，

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