找了一个下午。
org.hibernate.exception.GenericJDBCException: could not load an entity: [com.secoinfo.product.persistence.sec.productInfo.ProductInfoPO#1]
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:91)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:79)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1799)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:93)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:81)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:2730)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:365)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:346)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:161)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:891)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:859)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:266)
at org.hibernate.type.EntityType.resolve(EntityType.java:303)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:113)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:842)
at org.hibernate.loader.Loader.doQuery(Loader.java:717)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.doList(Loader.java:2145)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
at org.hibernate.loader.Loader.list(Loader.java:2024)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:308)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:153)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1129)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at com.secoinfo.frame.base.persistence.BaseDAO.queryPageSql(BaseDAO.java:392)
at com.secoinfo.frame.base.persistence.BaseDAO.queryBySql(BaseDAO.java:363)
at com.secoinfo.order.persistence.impl.orderInfo.OrderInfoDAOImpl.getTableData(OrderInfoDAOImpl.java:206)
at com.secoinfo.order.business.impl.orderInfo.OrderInfoServiceImpl.getTableData(OrderInfoServiceImpl.java:45)
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.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:287)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:181)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:148)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:100)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
at $Proxy43.getTableData(Unknown Source)
at com.secoinfo.order.presentation.sec.orderInfo.OrderInfoListPage.iniGrid(OrderInfoListPage.java:247)
at com.secoinfo.order.presentation.sec.orderInfo.OrderInfoListPage.formShow(OrderInfoListPage.java:205)
at com.secoinfo.frame.base.presentation.pages.baseform.BaseFormSupportPage.pageBeginRender(BaseFormSupportPage.java:117)

at org.apache.tapestry.AbstractPage.firePageBeginRender(AbstractPage.java:463)
at org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:293)
at org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:368)
at org.apache.tapestry.engine.AbstractEngine.renderResponse(AbstractEngine.java:749)
at org.apache.tapestry.engine.PageService.service(PageService.java:77)
at org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:889)
at org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:198)
at org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:159)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
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:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
Caused by: java.sql.SQLException: Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '='
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:946)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2985)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1631)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1723)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3283)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1332)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1467)
at org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:92)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1669)
at org.hibernate.loader.Loader.doQuery(Loader.java:662)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)
... 64 more


[解决办法]
字符编码问题，启动数据库的时候改成UTF-8试试
[解决办法]
Caused by: java.sql.SQLException: Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '='

“=”操作符的字符集不对 ?　　　　　在这个ｓｑｌ语句里把＝在英文状态下输入试试.?
貌似果然有区别
? =
? ＝
[解决办法]
Caused by: java.sql.SQLException: Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '='
就这里了~~~