1. 先根據異常中說不存在的表的表名去項目裡全局搜尋，是否有jpa實體聲明或引用，確定項目裡沒有的情況下
2. 去所連接配接的資料庫中搜尋，是否存在這張表，如果存在
3. 檢查表名，我所遇到的情況是，表名頭部帶了空格。導緻hibernate啟動的時候會掃描整個資料庫裡的表的中繼資料資訊時，對表名查詢時找不到此表。
org.hibernate.exception.SQLGrammarException: Error accessing tables metadata
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:63)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99)
at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.convertSQLException(InformationExtractorJdbcDatabaseMetaDataImpl.java:102)
at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.populateTablesWithColumns(InformationExtractorJdbcDatabaseMetaDataImpl.java:387)
at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.getTables(InformationExtractorJdbcDatabaseMetaDataImpl.java:341)
at org.hibernate.tool.schema.extract.internal.DatabaseInformationImpl.getTablesInformation(DatabaseInformationImpl.java:120)
at org.hibernate.tool.schema.internal.GroupedSchemaMigratorImpl.performTablesMigration(GroupedSchemaMigratorImpl.java:65)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.performMigration(AbstractSchemaMigrator.java:207)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:114)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73)
Caused by: java.sql.SQLSyntaxErrorException: Table 'xxx' doesn't exist
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.StatementImpl.executeQuery(StatementImpl.java:1200)
at com.mysql.cj.jdbc.DatabaseMetaData$2.forEach(DatabaseMetaData.java:2141)
at com.mysql.cj.jdbc.DatabaseMetaData$2.forEach(DatabaseMetaData.java:2070)
at com.mysql.cj.jdbc.IterateBlock.doForAll(IterateBlock.java:56)
at com.mysql.cj.jdbc.DatabaseMetaData.getColumns(DatabaseMetaData.java:2246)
at com.mchange.v2.c3p0.impl.NewProxyDatabaseMetaData.getColumns(NewProxyDatabaseMetaData.java:3068)
at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.populateTablesWithColumns(InformationExtractorJdbcDatabaseMetaDataImpl.java:354)
問題很隐蔽，解決的時候還是很爽的。