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1. org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is java.lang.UnsupportedOperationException: Not supported by BasicDataSource 。

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: Error creating bean with name 'productServiceBean': Injection of persistence fields failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [beans.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: org.hibernate.MappingException: Could not determine type for: java.util.Set, for columns: [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: could not insert: [com.yufei.bean.product.ProductType] Caused by: java.sql.SQLException: Data too long for column 'visible' at row 1 。

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: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener java.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: Error creating bean with name 'productTypeService': Injection of persistence fields failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [beans.xml]: Invocation of init method failed; nested exception is java.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. Failed to load or instantiate TagLibraryValidator class: 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 at net.fckeditor.connector.impl.AbstractLocalFileSystemConnector.getFolders(AbstractLocalFileSystemConnector.java:140) at net.fckeditor.connector.Dispatcher.getFoldersAndOrFiles(Dispatcher.java:204) at net.fckeditor.connector.Dispatcher.doGet(Dispatcher.java:156) at net.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.IOException while loading persisted sessions: java.io.EOFException java.io.EOFException at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2281) at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2750) at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:780) at java.io.ObjectInputStream.<init>(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: detached entity passed to persist: com.dalton.domain.User org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException 。

原因:

(1) 是entity bean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.

10 org.springframework.web.context.ContextLoader(line:215) - Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brand' defined in file [D:\Tomcat6\webapps\autoet\WEB-INF\classes\com\autoet\ action\brand\BrandAction.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.autoet.action.brand.BrandAction]: Constructor threw exception; nested exception is java.lang.NullPointerException 。

原因：项目使用了<context:component-scan/>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) 。

11 org.hibernate.tool.hbm2ddl.SchemaUpdate(line:222) - could not complete schema update java.lang.UnsupportedOperationException: Not supported by BasicDataSource 。

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 。

12 org.apache.struts2.dispatcher.Dispatcher(line:27) - Dispatcher initialization failed Unable to load configuration. - [unknown location] Cannot locate the chosen ObjectFactory implementation: spring - [unknown location] 。

原因 struts.xml中使用了<constant name="struts.objectFactory" value="spring"/>，将其注释掉 。

总结 。

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原文链接：http://blog.csdn.net/l1028386804/article/details/50349776 。

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