在使用hibernate时出现java.sql.SQLWarning: Unknown table 'user'错误

22:22:44,156  INFO Environment:500 - Hibernate 3.2.0
22:22:44,156  INFO Environment:533 - hibernate.properties not found
22:22:44,156  INFO Environment:667 - Bytecode provider name : cglib
22:22:44,156  INFO Environment:584 - using JDK 1.4 java.sql.Timestamp handling
22:22:44,203  INFO Configuration:1350 - configuring from resource: /hibernate.cfg.xml
22:22:44,203  INFO Configuration:1327 - Configuration resource: /hibernate.cfg.xml
22:22:44,375 DEBUG DTDEntityResolver:38 - trying to resolve system-id [http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd]
22:22:44,375 DEBUG DTDEntityResolver:40 - recognized hibernate namespace; attempting to resolve on classpath under org/hibernate/
22:22:44,375 DEBUG DTDEntityResolver:50 - located [http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd] in classpath
22:22:44,406 DEBUG Configuration:1311 - hibernate.connection.url=jdbc:mysql://localhost/hibernate_first
22:22:44,406 DEBUG Configuration:1311 - hibernate.connection.driver_class=com.mysql.jdbc.Driver
22:22:44,406 DEBUG Configuration:1311 - hibernate.connection.username=root
22:22:44,406 DEBUG Configuration:1311 - hibernate.connection.password=admin
22:22:44,421 DEBUG Configuration:1311 - hibernate.dialect=org.hibernate.dialect.MySQLDialect
22:22:44,421 DEBUG Configuration:1311 - hibernate.show_sql=true
22:22:44,421 DEBUG Configuration:1510 - null<-org.dom4j.tree.DefaultAttribute@19dfbff [Attribute: name resource value "com/hibernate/User.hbm.xml"]
22:22:44,421  INFO Configuration:507 - Reading mappings from resource: com/hibernate/User.hbm.xml
22:22:44,421 DEBUG DTDEntityResolver:38 - trying to resolve system-id [http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd]
22:22:44,421 DEBUG DTDEntityResolver:40 - recognized hibernate namespace; attempting to resolve on classpath under org/hibernate/
22:22:44,421 DEBUG DTDEntityResolver:50 - located [http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd] in classpath
22:22:44,500  INFO HbmBinder:300 - Mapping class: com.hibernate.User -> User
22:22:44,500 DEBUG HbmBinder:1270 - Mapped property: id -> id
22:22:44,515 DEBUG HbmBinder:1270 - Mapped property: name -> name
22:22:44,515 DEBUG HbmBinder:1270 - Mapped property: password -> password
22:22:44,515 DEBUG HbmBinder:1270 - Mapped property: createTime -> createTime
22:22:44,515 DEBUG HbmBinder:1270 - Mapped property: expireTime -> expireTime
22:22:44,515  INFO Configuration:1465 - Configured SessionFactory: null
22:22:44,515 DEBUG Configuration:1466 - properties: {hibernate.connection.password=admin, 22:22:44,531  INFO Dialect:141 - Using dialect: org.hibernate.dialect.MySQLDialect
22:22:44,562 DEBUG Configuration:1044 - processing extends queue
22:22:44,578 DEBUG Configuration:1048 - processing collection mappings
22:22:44,578 DEBUG Configuration:1059 - processing native query and ResultSetMapping mappings
22:22:44,578 DEBUG Configuration:1067 - processing association property references
22:22:44,578 DEBUG Configuration:1089 - processing foreign key constraints
22:22:44,625 DEBUG Configuration:1044 - processing extends queue
22:22:44,625 DEBUG Configuration:1048 - processing collection mappings
22:22:44,625 DEBUG Configuration:1059 - processing native query and ResultSetMapping mappings
22:22:44,625 DEBUG Configuration:1067 - processing association property references
22:22:44,625 DEBUG Configuration:1089 - processing foreign key constraints
22:22:44,625  INFO SchemaExport:154 - Running hbm2ddl schema export
22:22:44,625 DEBUG SchemaExport:170 - import file not found: /import.sql
22:22:44,625  INFO SchemaExport:179 - exporting generated schema to database
22:22:44,625  INFO DriverManagerConnectionProvider:41 - Using Hibernate built-in connection pool (not for production use!)
22:22:44,625  INFO DriverManagerConnectionProvider:42 - Hibernate connection pool size: 20
22:22:44,625  INFO DriverManagerConnectionProvider:45 - autocommit mode: false
22:22:44,640  INFO DriverManagerConnectionProvider:80 - using driver: com.mysql.jdbc.Driver at URL: jdbc:mysql://localhost/hibernate_first
22:22:44,640  INFO DriverManagerConnectionProvider:83 - connection properties: {user=root, password=admin}
22:22:44,640 DEBUG DriverManagerConnectionProvider:93 - total checked-out connections: 0
22:22:44,640 DEBUG DriverManagerConnectionProvider:109 - opening new JDBC connection
22:22:44,843 DEBUG DriverManagerConnectionProvider:115 - created connection to: jdbc:mysql://localhost/hibernate_first, Isolation Level: 4
drop table if exists User
22:22:44,843 DEBUG SchemaExport:303 - drop table if exists User
22:22:44,875 DEBUG JDBCExceptionReporter:40 - SQL Warning
java.sql.SQLWarning: Unknown table 'user'
at com.mysql.jdbc.SQLError.convertShowWarningsToSQLWarnings(SQLError.java:722)
at com.mysql.jdbc.SQLError.convertShowWarningsToSQLWarnings(SQLError.java:650)
at com.mysql.jdbc.Statement.getWarnings(Statement.java:1657)
at org.hibernate.tool.hbm2ddl.SchemaExport.execute(SchemaExport.java:309)
at org.hibernate.tool.hbm2ddl.SchemaExport.drop(SchemaExport.java:284)
at org.hibernate.tool.hbm2ddl.SchemaExport.execute(SchemaExport.java:186)
at org.hibernate.tool.hbm2ddl.SchemaExport.create(SchemaExport.java:133)
at com.hibernate.ExportDB.main(ExportDB.java:15)
22:22:44,875  WARN JDBCExceptionReporter:48 - SQL Warning: 1051, SQLState: 42S02
22:22:44,875  WARN JDBCExceptionReporter:49 - Unknown table 'user'
create table User (id varchar(255) not null, name varchar(255), password varchar(255), createTime datetime, expireTime datetime, primary key (id))
22:22:44,875 DEBUG SchemaExport:303 - create table User (id varchar(255) not null, name varchar(255), password varchar(255), createTime datetime, expireTime datetime, primary key (id))
22:22:44,875 ERROR SchemaExport:274 - Unsuccessful: create table User (id varchar(255) not null, name varchar(255), password varchar(255), createTime datetime, expireTime datetime, primary key (id))
22:22:44,875 ERROR SchemaExport:275 - The 'InnoDB' feature is disabled; you need MySQL built with 'InnoDB' to have it working
22:22:44,875  INFO SchemaExport:196 - schema export complete
22:22:44,875 DEBUG DriverManagerConnectionProvider:129 - returning connection to pool, pool size: 1
22:22:44,875  INFO DriverManagerConnectionProvider:147 - cleaning up connection pool: jdbc:mysql://localhost/hibernate_first