% Error creating sessionfactory %

Error:

% Error creating sessionfactory %
Org. hibernate. mappingexception: repeated column in mapping for entity: y2ssh. shyy. xmal4.entity. Bid column: goods_id (shocould be mapped with insert = "false" update = "false ")
At org. hibernate. Mapping. persistentclass. checkcolumnduplication (persistentclass. Java: 575)
At org. hibernate. Mapping. persistentclass. checkpropertycolumnduplication (persistentclass. Java: 597)
At org. hibernate. Mapping. persistentclass. checkcolumnduplication (persistentclass. Java: 615)
At org. hibernate. Mapping. persistentclass. Validate (persistentclass. Java: 405)
At org. hibernate. Mapping. rootclass. Validate (rootclass. Java: 192)
At org. hibernate. cfg. configuration. Validate (configuration. Java: 984)
At org. hibernate. cfg. configuration. buildsessionfactory (configuration. Java: 1169)
At y2ssh. shyy. xmal4.entity. hibernatesessionfactory. <clinit> (hibernatesessionfactory. Java: 18)
At y2ssh. shyy. xmal4.dao. hibimpl. basehibernatedao. getsession (basehibernatedao. Java: 105)
At y2ssh. shyy. xmal4.dao. hibimpl. basehibernatedao. Search (basehibernatedao. Java: 82)
At y2ssh. shyy. xmal4.dao. hibimpl. userdaohibimpl. Search (userdaohibimpl. Java: 19)
At y2ssh. shyy. xmal4.biz. hibbizimpl. userbizimpl. login (userbizimpl. Java: 44)
At y2ssh. shyy. xmal4.struts. Action. useraction. dologin (useraction. Java: 64)
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. Apache. Struts. Actions. dispatchaction. dispatchmethod (dispatchaction. Java: 274)
At org.apache.struts.actions.dispatchaction.exe cute (dispatchaction. Java: 194)
At org. Apache. Struts. Action. requestprocessor. processactionperform (requestprocessor. Java: 419)
At org. Apache. Struts. Action. requestprocessor. Process (requestprocessor. Java: 224)
At org. Apache. Struts. Action. actionservlet. Process (actionservlet. Java: 1194)
At org. Apache. Struts. Action. actionservlet. dopost (actionservlet. Java: 432)
At javax. servlet. http. httpservlet. Service (httpservlet. Java: 710)
At javax. servlet. http. httpservlet. Service (httpservlet. Java: 803)
At org. Apache. Catalina. Core. applicationfilterchain. internaldofilter (applicationfilterchain. Java: 290)
At org. Apache. Catalina. Core. applicationfilterchain. dofilter (applicationfilterchain. Java: 206)
At org. Apache. Catalina. Core. standardwrappervalve. Invoke (standardwrappervalve. Java: 233)
At org. Apache. Catalina. Core. standardcontextvalve. Invoke (standardcontextvalve. Java: 175)
At org. Apache. Catalina. Core. standardhostvalve. Invoke (standardhostvalve. Java: 128)
At org. Apache. Catalina. Valves. errorreportvalve. Invoke (errorreportvalve. Java: 102)
At org. Apache. Catalina. Core. standardenginevalve. Invoke (standardenginevalve. Java: 109)
At org. Apache. Catalina. connector. coyoteadapter. Service (coyoteadapter. Java: 286)
At org. Apache. Coyote. http11.http11processor. Process (http11processor. Java: 844)
At org. Apache. Coyote. http11.http11protocol $ http11connectionhandler. Process (http11protocol. Java: 583)
At org.apache.tomcat.util.net. jioendpoint $ worker. Run (jioendpoint. Java: 447)
At java. Lang. thread. Run (unknown source)
% Error creating sessionfactory %
Org. hibernate. mappingexception: cocould not read mappings from resource: y2ssh/shyy/xmal4/entity/user. HBM. xml
At org. hibernate. cfg. configuration. addresource (configuration. Java: 485)
At org. hibernate. cfg. configuration. parsemappingelement (configuration. Java: 1465)
At org. hibernate. cfg. configuration. parsesessionfactory (configuration. Java: 1433)
At org. hibernate. cfg. configuration. doconfigure (configuration. Java: 1414)
At org. hibernate. cfg. configuration. doconfigure (configuration. Java: 1390)
At org. hibernate. cfg. configuration. Configure (configuration. Java: 1310)
At y2ssh. shyy. xmal4.entity. hibernatesessionfactory. rebuildsessionfactory (hibernatesessionfactory. Java: 46)
At y2ssh. shyy. xmal4.entity. hibernatesessionfactory. getsession (hibernatesessionfactory. Java: 33)
At y2ssh. shyy. xmal4.dao. hibimpl. basehibernatedao. getsession (basehibernatedao. Java: 105)
At y2ssh. shyy. xmal4.dao. hibimpl. basehibernatedao. Search (basehibernatedao. Java: 82)
At y2ssh. shyy. xmal4.dao. hibimpl. userdaohibimpl. Search (userdaohibimpl. Java: 19)
At y2ssh. shyy. xmal4.biz. hibbizimpl. userbizimpl. login (userbizimpl. Java: 44)
At y2ssh. shyy. xmal4.struts. Action. useraction. dologin (useraction. Java: 64)
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. Apache. Struts. Actions. dispatchaction. dispatchmethod (dispatchaction. Java: 274)
At org.apache.struts.actions.dispatchaction.exe cute (dispatchaction. Java: 194)
At org. Apache. Struts. Action. requestprocessor. processactionperform (requestprocessor. Java: 419)
At org. Apache. Struts. Action. requestprocessor. Process (requestprocessor. Java: 224)
At org. Apache. Struts. Action. actionservlet. Process (actionservlet. Java: 1194)
At org. Apache. Struts. Action. actionservlet. dopost (actionservlet. Java: 432)
At javax. servlet. http. httpservlet. Service (httpservlet. Java: 710)
At javax. servlet. http. httpservlet. Service (httpservlet. Java: 803)
At org. Apache. Catalina. Core. applicationfilterchain. internaldofilter (applicationfilterchain. Java: 290)
At org. Apache. Catalina. Core. applicationfilterchain. dofilter (applicationfilterchain. Java: 206)
At org. Apache. Catalina. Core. standardwrappervalve. Invoke (standardwrappervalve. Java: 233)
At org. Apache. Catalina. Core. standardcontextvalve. Invoke (standardcontextvalve. Java: 175)
At org. Apache. Catalina. Core. standardhostvalve. Invoke (standardhostvalve. Java: 128)
At org. Apache. Catalina. Valves. errorreportvalve. Invoke (errorreportvalve. Java: 102)
At org. Apache. Catalina. Core. standardenginevalve. Invoke (standardenginevalve. Java: 109)
At org. Apache. Catalina. connector. coyoteadapter. Service (coyoteadapter. Java: 286)
At org. Apache. Coyote. http11.http11processor. Process (http11processor. Java: 844)
At org. Apache. Coyote. http11.http11protocol $ http11connectionhandler. Process (http11protocol. Java: 583)
At org.apache.tomcat.util.net. jioendpoint $ worker. Run (jioendpoint. Java: 447)
At java. Lang. thread. Run (unknown source)
Caused by: org. hibernate. duplicatemappingexception: duplicate class/entity mapping y2ssh. shyy. xmal4.entity. User
At org. hibernate. cfg. mappings. addclass (mappings. Java: 118)
At org. hibernate. cfg. hbmbinder. bindroot (hbmbinder. Java: 154)
At org. hibernate. cfg. configuration. Add (configuration. Java: 386)
At org. hibernate. cfg. configuration. addinputstream (config. Java: 427)
At org. hibernate. cfg. configuration. addresource (configuration. Java: 482)
... 36 More
2011-9-20 9:14:21 org. Apache. Catalina. Core. standardwrappervalve invoke
Severe: servlet. Service () for servlet action threw exception
Java. Lang. nullpointerexception
At y2ssh. shyy. xmal4.dao. hibimpl. basehibernatedao. Search (basehibernatedao. Java: 82)
At y2ssh. shyy. xmal4.dao. hibimpl. userdaohibimpl. Search (userdaohibimpl. Java: 19)
At y2ssh. shyy. xmal4.biz. hibbizimpl. userbizimpl. login (userbizimpl. Java: 44)
At y2ssh. shyy. xmal4.struts. Action. useraction. dologin (useraction. Java: 64)
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. Apache. Struts. Actions. dispatchaction. dispatchmethod (dispatchaction. Java: 274)
At org.apache.struts.actions.dispatchaction.exe cute (dispatchaction. Java: 194)
At org. Apache. Struts. Action. requestprocessor. processactionperform (requestprocessor. Java: 419)
At org. Apache. Struts. Action. requestprocessor. Process (requestprocessor. Java: 224)
At org. Apache. Struts. Action. actionservlet. Process (actionservlet. Java: 1194)
At org. Apache. Struts. Action. actionservlet. dopost (actionservlet. Java: 432)
At javax. servlet. http. httpservlet. Service (httpservlet. Java: 710)
At javax. servlet. http. httpservlet. Service (httpservlet. Java: 803)
At org. Apache. Catalina. Core. applicationfilterchain. internaldofilter (applicationfilterchain. Java: 290)
At org. Apache. Catalina. Core. applicationfilterchain. dofilter (applicationfilterchain. Java: 206)
At org. Apache. Catalina. Core. standardwrappervalve. Invoke (standardwrappervalve. Java: 233)
At org. Apache. Catalina. Core. standardcontextvalve. Invoke (standardcontextvalve. Java: 175)
At org. Apache. Catalina. Core. standardhostvalve. Invoke (standardhostvalve. Java: 128)
At org. Apache. Catalina. Valves. errorreportvalve. Invoke (errorreportvalve. Java: 102)
At org. Apache. Catalina. Core. standardenginevalve. Invoke (standardenginevalve. Java: 109)
At org. Apache. Catalina. connector. coyoteadapter. Service (coyoteadapter. Java: 286)
At org. Apache. Coyote. http11.http11processor. Process (http11processor. Java: 844)
At org. Apache. Coyote. http11.http11protocol $ http11connectionhandler. Process (http11protocol. Java: 583)
At org.apache.tomcat.util.net. jioendpoint $ worker. Run (jioendpoint. Java: 447)
At java. Lang. thread. Run (unknown source)

Error cause:

The Hibernate object class ing error causes the following NULL pointer exceptions,

Solution:

<Export-to-one name = "goods" class = "y2ssh. shyy. xmal4.entity. Goods" Fetch = "select">
<Column name = "goodsid"/>
</Role-to-one>

Change goodsid to bidid. OK. The program passes the test.

In this case, you should calmly consider whether the one-to-least or two-to-one ing of your table is wrong.

Here I have multiple items that correspond to one auction price, so this corresponds to the auction price ID so that the table can be matched.