hiebernate出错

[wymz]

错误信息如下
Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
五月 29, 2013 11:33:28 下午 com.mchange.v2.log.MLog <clinit>
信息: MLog clients using java 1.4+ standard logging.
五月 29, 2013 11:33:28 下午 com.mchange.v2.c3p0.C3P0Registry banner
信息: Initializing c3p0-0.9.1 [built 16-January-2007 14:46:42; debug? true; trace: 10]
五月 29, 2013 11:33:28 下午 com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource getPoolManager
信息: Initializing c3p0 pool... com.mchange.v2.c3p0.PoolBackedDataSource@ca2c007e [ connectionPoolDataSource -> com.mchange.v2.c3p0.WrapperConnectionPoolDataSource@c7640176 [ acquireIncrement -> 2, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, debugUnreturnedConnectionStackTraces -> false, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> 1hge1638u1uui9c83ut4mc|16edaf6, idleConnectionTestPeriod -> 3000, initialPoolSize -> 1, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 5000, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 20, maxStatements -> 100, maxStatementsPerConnection -> 0, minPoolSize -> 1, nestedDataSource -> com.mchange.v2.c3p0.DriverManagerDataSource@fae95d26 [ description -> null, driverClass -> null, factoryClassLocation -> null, identityToken -> 1hge1638u1uui9c83ut4mc|800a9e, jdbcUrl -> jdbc:mysql://localhost/test2, properties -> {user=******, password=******} ], preferredTestQuery -> null, propertyCycle -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false; userOverrides: {} ], dataSourceName -> null, factoryClassLocation -> null, identityToken -> 1hge1638u1uui9c83ut4mc|16469e8, numHelperThreads -> 3 ]
Hibernate:
insert
into
news_table
(title, content)
values
(?, ?)
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not insert: [org.crazyit.app.domain.News]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:92)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2327)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2834)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:320)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
at lee.NewsManager.main(NewsManager.java:39)
Caused by: java.sql.SQLException: Table 'test2.news_table' doesn't exist
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2921)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1570)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2978)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2902)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:930)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1159)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1076)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1061)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:105)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:94)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:57)
... 16 more


代码如下
public static void main(String[] args)
throws Exception
{
//实例化Configuration，
Configuration conf = new Configuration()
//下面方法默认加载hibernate.cfg.xml文件
.configure();
//以Configuration创建SessionFactory
SessionFactory sf = conf.buildSessionFactory();
//创建Session
Session sess = sf.openSession();
//开始事务
Transaction tx = sess.beginTransaction();
//创建消息实例
News n = new News();
//设置消息标题和消息内容
n.setTitle("成立了");
n.setContent("成立了，"
+ "网站地址");
//保存消息
sess.save(n);
//提交事务
tx.commit();
//关闭Session
sess.close();
sf.close();
}

public class News
{
//消息类的标识属性
private Integer id;
//消息标题
private String title;
//消息内容
private String content;

//id属性的setter和getter方法
public void setId(Integer id)
{
this.id = id;
}
public Integer getId()
{
return this.id;
}

//title属性的setter和getter方法
public void setTitle(String title)
{
this.title = title;
}
public String getTitle()
{
return this.title;
}

//content属性的setter和getter方法
public void setContent(String content)
{
this.content = content;
}
public String getContent()
{
return this.content;
}

<?xml version="1.0" encoding="gb2312"?>
<!-- 指定Hiberante3映射文件的DTD信息 -->
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<!-- hibernate-mapping是映射文件的根元素 -->
<hibernate-mapping package="org.crazyit.app.domain">
<!-- 每个class元素对应一个持久化对象 -->
<class name="News" table="news_table">
<!-- id元素定义持久化类的标识属性 -->
<id name="id">
<!-- 指定主键生成策略 -->
<generator class="native"/>
</id>
<!-- property元素定义常规属性 -->
<property name="title"/>
<property name="content"/>
</class>
</hibernate-mapping>

<?xml version="1.0" encoding="GBK"?>
<!-- 指定Hibernate配置文件的DTD信息 -->
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<!-- hibernate- configuration是连接配置文件的根元素 -->
<hibernate-configuration>
<session-factory>
<!-- 指定连接数据库所用的驱动 -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<!-- 指定连接数据库的url，hibernate连接的数据库名 -->
<property name="connection.url">jdbc:mysql://localhost/test2</property>
<!-- 指定连接数据库的用户名 -->
<property name="connection.username">root</property>
<!-- 指定连接数据库的密码 -->
<property name="connection.password">root</property>
<!-- 指定连接池里最大连接数 -->
<property name="hibernate.c3p0.max_size">20</property>
<!-- 指定连接池里最小连接数 -->
<property name="hibernate.c3p0.min_size">1</property>
<!-- 指定连接池里连接的超时时长 -->
<property name="hibernate.c3p0.timeout">5000</property>
<!-- 指定连接池里最大缓存多少个Statement对象 -->
<property name="hibernate.c3p0.max_statements">100</property>
<property name="hibernate.c3p0.idle_test_period">3000</property>
<property name="hibernate.c3p0.acquire_increment">2</property>
<property name="hibernate.c3p0.validate">true</property>
<!-- 指定数据库方言 -->
<property name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
<!-- 根据需要自动创建数据表 -->
<property name="hbm2ddl.auto">update</property>
<!-- 显示Hibernate持久化操作所生成的SQL -->
<property name="show_sql">true</property>
<!-- 将SQL脚本进行格式化后再输出 -->
<property name="hibernate.format_sql">true</property>
<!-- 罗列所有的映射文件 -->
<mapping resource="org/crazyit/app/domain/News.hbm.xml"/>
</session-factory>
</hibernate-configuration>

[wymz]

引用 13 楼 fangmingshijie 的回复:

key值改为hibernate.hbm2ddl.auto试试。要写上hibernate的

效果一样

[花谢尊前不敢香]

看你数据库方言用的是MySQLInnoDBDialect，这个要表存在才能用，是改变表的结构的。改用MySQLDialect；一下是区别： MySQLDialect：mysql默认存储引擎为InnoDB，需创建新表（表名不存在） MySQLInnoDBDialect：mysql默认存储引擎为InnoDB，需更改表结构（表名存在）

[wymz]

引用 15 楼 fangmingshijie 的回复:

看你数据库方言用的是MySQLInnoDBDialect，这个要表存在才能用，是改变表的结构的。改用MySQLDialect；一下是区别： MySQLDialect：mysql默认存储引擎为InnoDB，需创建新表（表名不存在） MySQLInnoDBDialect：mysql默认存储引擎为InnoDB，需更改表结构（表名存在）

终于搞好了，谢谢。另外说一下，我用的是mysql5.6，第二个数据库方言要MySQL5InnoDBDialect才能用。

[花谢尊前不敢香]

news_table这个表不存在，你配置自动创建表了吗？ <prop key="hibernate.hbm2ddl.auto">create</prop>

[十橙心橙意]

<property name="connection.url">jdbc:mysql://localhost/test2</property> 端口号都没有的，能访问的到数据库么？

[hxm]

Failed to load class "org.slf4j.impl.StaticLoggerBinder". 这个类没有导入

[一叶飞舟]

Caused by: java.sql.SQLException: Table 'test2.news_table' doesn't exist，你访问的表不存在，或者你的实体和表没建立起关联

[阿诺]

Caused by: java.sql.SQLException: Table 'test2.news_table' doesn't exist

[七神之光]

test2

[wymz]

引用 1 楼 fangmingshijie 的回复:

news_table这个表不存在，你配置自动创建表了吗？ <prop key="hibernate.hbm2ddl.auto">create</prop>

配置了还是出错，而且是同样的错误

[wymz]

引用 3 楼 wo000000000 的回复:

Failed to load class "org.slf4j.impl.StaticLoggerBinder". 这个类没有导入

不是这问题

[wymz]

引用 6 楼 fatg1988 的回复:

test2

不是这问题

[花谢尊前不敢香]

先手动建个一个表，还有配置文件编码都保持一致

[wymz]

引用 5 楼 anybyb 的回复:

Caused by: java.sql.SQLException: Table 'test2.news_table' doesn't exist

是这样，创建之后就没出错了，但是hibernate本身就有自动建表功能，这种手动创建做法不是很笨吗？该成create也是不行的

[wymz]

引用 10 楼 fangmingshijie 的回复:

我的编码没问题，先手动建个一个表，还有配置文件编码都保持一致

是这样，创建之后就没出错了，但是hibernate本身就有自动建表功能，这种手动创建做法不是很笨吗？我这里的配置改成create也是出错的

[花谢尊前不敢香]

key值改为hibernate.hbm2ddl.auto试试。要写上hibernate的