我有两个持久化类：User.java，Role.java，这些在hibernate.cfg.xml中声明。我在用春天。 applicationContext.xml具有：
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<bean id="dataSource" class="info.ems.datasource.DataSourceFactory">
<property name="driverClassName" value="${database.driver}"/>
<property name="url" value="${database.url}"/>
<property name="username" value="${database.username}"/>
<property name="password" value="${database.password}"/>
<property name="validationQuery" value="${database.validationQuery}"/>
<property name="dataSourceJndiName" value="${database.datasource.jndiname}"/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation">
<value>/WEB-INF/hibernate.cfg.xml</value>
</property>
<property name="configurationClass">
<value>org.hibernate.cfg.AnnotationConfiguration</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
</props>
</property>
</bean>
<bean id="dao" class="info.ems.hibernate.HibernateEMSDao" init-method="createSchema">
<property name="hibernateTemplate">
<bean class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory"/>
<property name="flushMode">
<bean id="org.springframework.orm.hibernate3.HibernateAccessor.FLUSH_COMMIT" class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean"/>
</property>
</bean>
</property>
<property name="schemaHelper">
<bean class="info.ems.hibernate.SchemaHelper">
<property name="driverClassName" value="${database.driver}"/>
<property name="url" value="${database.url}"/>
<property name="username" value="${database.username}"/>
<property name="password" value="${database.password}"/>
<property name="hibernateDialect" value="${hibernate.dialect}"/>
<property name="dataSourceJndiName" value="${database.datasource.jndiname}"/>
</bean>
</property>
</bean>
DataSourceFactory.java：
public class DataSourceFactory implements FactoryBean, DisposableBean {
/** The logger. */
private final Logger logger = LoggerFactory.getLogger(getClass());
/** The driver class name. */
private String driverClassName;
/** The url. */
private String url;
/** The username. */
private String username;
/** The password. */
private String password;
/** The validation query. */
private String validationQuery;
/** The data source jndi name. */
private String dataSourceJndiName;
/** The data source. */
private DataSource dataSource;
/**
* Sets the driver class name.
*
* @param driverClassName
* the new driver class name
*/
public void setDriverClassName(String driverClassName) {
this.driverClassName = driverClassName;
}
/**
* Sets the url.
*
* @param url
* the new url
*/
public void setUrl(String url) {
this.url = url;
}
/**
* Sets the username.
*
* @param username
* the new username
*/
public void setUsername(String username) {
this.username = username;
}
/**
* Sets the password.
*
* @param password
* the new password
*/
public void setPassword(String password) {
this.password = password;
}
/**
* Sets the validation query.
*
* @param validationQuery
* the new validation query
*/
public void setValidationQuery(String validationQuery) {
this.validationQuery = validationQuery;
}
/**
* Sets the data source jndi name.
*
* @param dataSourceJndiName
* the new data source jndi name
*/
public void setDataSourceJndiName(String dataSourceJndiName) {
this.dataSourceJndiName = dataSourceJndiName;
}
/*
* (non-Javadoc)
*
* @see org.springframework.beans.factory.FactoryBean#getObject()
*/
@Override
public Object getObject() throws Exception {
if (StringUtils.hasText(dataSourceJndiName)) {
logger.info("JNDI datasource requested, looking up datasource from JNDI name: '" + dataSourceJndiName + "'.");
JndiObjectFactoryBean jndiObjectFactoryBean = new JndiObjectFactoryBean();
jndiObjectFactoryBean.setJndiName(dataSourceJndiName);
jndiObjectFactoryBean.setResourceRef(true);
try {
jndiObjectFactoryBean.afterPropertiesSet();
} catch (Exception e) {
logger.error("datasource init from JNDI failed : " + e);
logger.error("Aborting application startup.");
throw new RuntimeException(e);
}
dataSource = (DataSource) jndiObjectFactoryBean.getObject();
} else if (url.startsWith("jdbc:hsqldb:file")) {
logger.info("Embedded HSQLDB mode detected, switching on spring single connection data source.");
SingleConnectionDataSource singleConnectionDataSource = new SingleConnectionDataSource();
singleConnectionDataSource.setUrl(url);
singleConnectionDataSource.setDriverClassName(driverClassName);
singleConnectionDataSource.setUsername(username);
singleConnectionDataSource.setPassword(password);
singleConnectionDataSource.setSuppressClose(true);
dataSource = singleConnectionDataSource;
} else {
logger.info("Not using embedded HSQLDB or JNDI datasource, switching on Apache DBCP data source connection pooling.");
BasicDataSource basicDataSource = new BasicDataSource();
basicDataSource.setUrl(url);
basicDataSource.setDriverClassName(driverClassName);
basicDataSource.setUsername(username);
basicDataSource.setPassword(password);
basicDataSource.setValidationQuery(validationQuery);
basicDataSource.setTestOnBorrow(false);
basicDataSource.setTestWhileIdle(true);
basicDataSource.setTimeBetweenEvictionRunsMillis(600000);
dataSource = basicDataSource;
}
return dataSource;
}
/*
* (non-Javadoc)
*
* @see org.springframework.beans.factory.FactoryBean#getObjectType()
*/
@Override
public Class<?> getObjectType() {
return DataSource.class;
}
/*
* (non-Javadoc)
*
* @see org.springframework.beans.factory.FactoryBean#isSingleton()
*/
@Override
public boolean isSingleton() {
return true;
}
/*
* (non-Javadoc)
*
* @see org.springframework.beans.factory.DisposableBean#destroy()
*/
@Override
public void destroy() throws Exception {
if (dataSource instanceof SingleConnectionDataSource) {
logger.info("Attempting to shut down embedded HSQLDB database.");
Connection connection = dataSource.getConnection();
Statement statement = connection.createStatement();
statement.executeUpdate("SHUTDOWN");
statement.close();
connection.close();
logger.info("Embedded HSQLDB database shut down successfully.");
} else if (dataSource instanceof BasicDataSource) {
logger.info("Attempting to close Apache DBCP data source.");
((BasicDataSource) dataSource).close();
logger.info("Apache DBCP data source closed successfully.");
} else {
logger.info("Context shutting down for JNDI datasource.");
}
}
}
HibernateEMSDao.java：
public class HibernateEMSDao extends HibernateDaoSupport implements EMSDao {
private final Logger logger = LoggerFactory.getLogger(getClass());
private SchemaHelper schemaHelper;
public void setSchemaHelper(SchemaHelper schemaHelper) {
this.schemaHelper = schemaHelper;
}
public void storeUser(User user) {
getHibernateTemplate().merge(user);
}
public void createSchema() {
try {
getHibernateTemplate().find("from User user where user.id = 1");
} catch (Exception e) {
logger.warn("expected database schema does not exist, will create. Error is: " + e.getMessage());
schemaHelper.createSchema();
User admin = new User();
admin.setUsername("admin");
admin.setName("Admin");
admin.setEmail("admin");
admin.setPassword("21232f297a57a5a743894a0e4a801fc3");
logger.info("inserting default admin user into database");
storeUser(admin);
logger.info("schema creation complete");
return;
}
logger.info("database schema exists, normal startup");
}
}
SchemaHelper.java：
public class SchemaHelper {
private final Logger logger = LoggerFactory.getLogger(getClass());
private String driverClassName;
private String url;
private String username;
private String password;
private String hibernateDialect;
private String dataSourceJndiName;
public void setDriverClassName(String driverClassName) {
this.driverClassName = driverClassName;
}
public void setHibernateDialect(String hibernateDialect) {
this.hibernateDialect = hibernateDialect;
}
public void setUrl(String url) {
this.url = url;
}
public void setUsername(String username) {
this.username = username;
}
public void setPassword(String password) {
this.password = password;
}
public void setDataSourceJndiName(String dataSourceJndiName) {
this.dataSourceJndiName = dataSourceJndiName;
}
/**
* create tables using the given Hibernate configuration
*/
public void createSchema() {
AnnotationConfiguration configuration = new AnnotationConfiguration();
if (StringUtils.hasText("dataSourceJndiName")) {
configuration.setProperty("hibernate.connection.datasource", dataSourceJndiName);
} else {
configuration.setProperty("hibernate.connection.driver_class", driverClassName);
configuration.setProperty("hibernate.connection.url", url);
configuration.setProperty("hibernate.connection.username", username);
configuration.setProperty("hibernate.connection.password", password);
}
configuration.setProperty("hibernate.dialect", hibernateDialect);
configuration.addAnnotatedClass(User.class);
configuration.addAnnotatedClass(Role.class);
logger.info("begin database schema creation =========================");
new SchemaUpdate(configuration).execute(true, true);
logger.info("end database schema creation ===========================");
}
}
和hibernate.cfg.xml：
<hibernate-configuration>
<session-factory>
<mapping class="info.ems.models.User" />
<mapping class="info.ems.models.Role" />
</session-factory>
</hibernate-configuration>
正如您在HibernateEMSDao.java中所看到的，我正在尝试查找是否存在预期的数据库模式，否则将通过SchemaHelper.java创建数据库模式。但不幸的是它没有用。我得到例外：
13:26:04,225 INFO [STDOUT] 2011-05-29 13:26:04,225 [ScannerThread] INFO [info.ems.datasource.DataSourceFactory] - Embedded HSQLDB mode detected, switching on spring single connection data source.
13:26:05,063 INFO [STDOUT] 2011-05-29 13:26:05,063 [ScannerThread] WARN [org.hibernate.util.JDBCExceptionReporter] - SQL Error: -22, SQLState: S0002
13:26:05,063 INFO [STDOUT] 2011-05-29 13:26:05,063 [ScannerThread] ERROR [org.hibernate.util.JDBCExceptionReporter] - Table not found in statement [select user0_.USER_ID as USER1_0_, user0_.USERNAME as USERNAME0_, user0_.PASSWORD as PASSWORD0_, user0_.NAME as NAME0_, user0_.EMAIL as EMAIL0_, user0_.LOCKED as LOCKED0_ from USER user0_ where user0_.USER_ID=1]
13:26:05,064 INFO [STDOUT] 2011-05-29 13:26:05,064 [ScannerThread] WARN [info.ems.hibernate.HibernateEMSDao] - expected database schema does not exist, will create. Error is: could not execute query; nested exception is org.hibernate.exception.SQLGrammarException: could not execute query
13:26:05,065 INFO [STDOUT] 2011-05-29 13:26:05,065 [ScannerThread] INFO [info.ems.hibernate.SchemaHelper] - begin database schema creation =========================
13:26:05,072 INFO [STDOUT] 2011-05-29 13:26:05,071 [ScannerThread] FATAL [org.hibernate.connection.DatasourceConnectionProvider] - Could not find datasource:
java.lang.ClassCastException: org.jnp.interfaces.NamingContext cannot be cast to javax.sql.DataSource
我正在以错误的方式做事，任何信息对我都非常有帮助。
谢谢和问候。
答案 0 :(得分：0)
我认为（我可能错了; D）该例外确切地说明了发生了什么。
您定义：
<bean id="dataSource" class="info.ems.datasource.DataSourceFactory">
哪个不是数据源，然后将其传递给：
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
班级演员的地方。