Java编程ssh整合常见错误解析

2023-09-23 04:20:07 70

1.org.springframework.transaction.CannotCreateTransactionException:CouldnotopenJPAEntityManagerfortransaction;nestedexceptionisjava.lang.UnsupportedOperationException:NotsupportedbyBasicDataSource

Spring不能为JAP创建事务。原因是bean.xml设定了数据源persistence.xml中要把数据库连接去掉

2.org.springframework.beans.factory.BeanCreationException:Errorcreatingbeanwithname'productServiceBean':Injectionofpersistencefieldsfailed;nestedexceptionisorg.springframework.beans.factory.BeanCreationException:Errorcreatingbeanwithname'entityManagerFactory'definedinclasspathresource[beans.xml]:Invocationofinitmethodfailed;nestedexceptionisjavax.persistence.PersistenceException:org.hibernate.MappingException:Couldnotdeterminetypefor:java.util.Set,forcolumns:[org.hibernate.mapping.Column(childtypes)]

原因：@Id@GeneratedValue(strategy=GenerationType.AUTO)

这个注解写在get方法上不要写在属性声明上。

3.javax.persistence.PersistenceException:org.hibernate.exception.DataException:couldnotinsert:[com.yufei.bean.product.ProductType]
Causedby:java.sql.SQLException:Datatoolongforcolumn'visible'atrow1

原因：实体类字段中的visible插入到数据库中所对应的值为ASCII码味49，超出范围。

换个mysql的jar包解决问题。

4.web容器出现

严重:Exceptionsendingcontextinitializedeventtolistenerinstanceofclassorg.springframework.web.context.ContextLoaderListenerjava.lang.NoClassDefFoundError:org/apache/commons/logging/LogFactory

此问题多样化，查阅资料说是jar包commons-logging.jar问题,但解决的方式是重新导入项目...

5.org.springframework.beans.factory.BeanCreationException:Errorcreatingbeanwithname'productTypeService':Injectionofpersistencefieldsfailed;nestedexceptionisorg.springframework.beans.factory.BeanCreationException:Errorcreatingbeanwithname'entityManagerFactory'definedinclasspathresource[beans.xml]:Invocationofinitmethodfailed;nestedexceptionisjava.lang.NoSuchMethodError:org.objectweb.asm.ClassVisitor.visit(IILjava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)V

原因：Spring2.5下asm-2.2.3.jar与hibernate下的asm.jar冲突，删除asm-2.2.3.jar。

6.FailedtoloadorinstantiateTagLibraryValidatorclass:org.apache.taglibs.standard.tlv.JstlCoreTLV
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:88)
org.apache.jasper.compiler.Parser.processIncludeDirective(Parser.java:340)

原因：lib中缺少standard.jar,jstl.jar

7.java.lang.NoSuchFieldError:DIRECTORY
atnet.fckeditor.connector.impl.AbstractLocalFileSystemConnector.getFolders(AbstractLocalFileSystemConnector.java:140)
atnet.fckeditor.connector.Dispatcher.getFoldersAndOrFiles(Dispatcher.java:204)
atnet.fckeditor.connector.Dispatcher.doGet(Dispatcher.java:156)
atnet.fckeditor.connector.ConnectorServlet.doGet(ConnectorServlet.java:89)

原因：包冲突，删掉struts1.3自带的commons-io-1.1.jar，commons-fileupload-1.1.1.jar，加入commons-io-1.3.2.jar，commons-fileupload-1.2.1.jar

8.IOExceptionwhileloadingpersistedsessions:java.io.EOFException
java.io.EOFException
atjava.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2281)
atjava.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2750)
atjava.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:780)
atjava.io.ObjectInputStream.(ObjectInputStream.java:280)

原因是tomcat对硬盘的session读取失败，彻底解决办法一下：将work下面的文件清空，主要是*.ser文件，或者只是删除掉session.ser即可以解决。

9.javax.persistence.PersistenceException:org.hibernate.PersistentObjectException:detachedentitypassedtopersist:com.dalton.domain.User
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException

原因：

(1)是entitybean的@Id标记错了,标记在了String等类型上
(2)对id字段手工设定了值。

10org.springframework.web.context.ContextLoader(line:215)-Contextinitializationfailed
org.springframework.beans.factory.BeanCreationException:Errorcreatingbeanwith
name'brand'definedinfile[D:\Tomcat6\webapps\autoet\WEB-INF\classes\com\autoet\
action\brand\BrandAction.class]:Instantiationofbeanfailed;nestedexceptionis
org.springframework.beans.BeanInstantiationException:Couldnotinstantiatebean
class[com.autoet.action.brand.BrandAction]:Constructorthrewexception;nested
exceptionisjava.lang.NullPointerException

原因：项目使用了扫描机制,而类BrandAction没有标注为原型,
为类添加@Scope("prototype")标注(与@Controller相同位置)

11org.hibernate.tool.hbm2ddl.SchemaUpdate(line:222)-couldnotcompleteschemaupdate
java.lang.UnsupportedOperationException:NotsupportedbyBasicDataSource

原因spring.xml与persistence.xml中都配置了数据库连接,注释掉persistence.xml中的连接信息

12org.apache.struts2.dispatcher.Dispatcher(line:27)-Dispatcherinitializationfailed
Unabletoloadconfiguration.-[unknownlocation]
CannotlocatethechosenObjectFactoryimplementation:spring-[unknownlocation]

原因struts.xml中使用了，将其注释掉

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Java编程ssh整合常见错误解析

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