java的Hibernate框架报错“ConnectionReleaseModeException”的原因和解决方法

当使用Java的Hibernate框架时，可能会遇到“ConnectionReleaseModeException”错误。这个错误通常是由于以下原因之一引起的：

• 无效的连接释放模式：如果您的连接释放模式无效，则可能会出现此错误。在这种情况下，需要检查您的连接释放模式以解决此问题。

• Hibernate版本不兼容：如果您的Hibernate版本不兼容，则可能会出现此错误。在这种情况下，需要升级或降级Hibernate版本以解决此问题。

以下是两个实例：

实例 1

如果您的连接释放模式无效，则可以尝试检查您的连接释放模式以解决此问题。例如，如果您尝试使用以下代码时出现“ConnectionReleaseModeException”错误：

@Configuration
@EnableTransactionManagement
public class HibernateConfig {
    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan("com.example.model");
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/mydb");
        dataSource.setUsername("root");
        dataSource.setPassword("password");
        return dataSource;
    }

    private Properties hibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
        properties.put("hibernate.show_sql", "true");
        properties.put("hibernate.format_sql", "true");
        properties.put("hibernate.connection.release_mode", "after_transaction");
        return properties;
    }
}

但是，您的连接释放模式可能不正确，则可以尝试检查您的连接释放模式以解决此问题。

@Configuration
@EnableTransactionManagement
public class HibernateConfig {
    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan("com.example.model");
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/mydb");
        dataSource.setUsername("root");
        dataSource.setPassword("password");
        return dataSource;
    }

    private Properties hibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
        properties.put("hibernate.show_sql", "true");
        properties.put("hibernate.format_sql", "true");
        properties.put("hibernate.connection.release_mode", "after_statement");
        return properties;
    }
}

实例 2

如果您的Hibernate版本不兼容，则可以尝试升级或降级Hibernate版本以解决此问题。例如，如果您尝试使用以下代码时出现“ConnectionReleaseModeException”错误：

@Configuration
@EnableTransactionManagement
public class HibernateConfig {
    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan("com.example.model");
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/mydb");
        dataSource.setUsername("root");
        dataSource.setPassword("password");
        return dataSource;
    }

    private Properties hibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
        properties.put("hibernate.show_sql", "true");
        properties.put("hibernate.format_sql", "true");
        properties.put("hibernate.connection.release_mode", "after_transaction");
        return properties;
    }
}

但是，您的Hibernate版本可能不兼容，则可以尝试升级或降级Hibernate版本以解决此问题。

@Configuration
@EnableTransactionManagement
public class HibernateConfig {
    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan("com.example.model");
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/mydb");
        dataSource.setUsername("root");
        dataSource.setPassword("password");
        return dataSource;
    }

    private Properties hibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
        properties.put("hibernate.show_sql", "true");
        properties.put("hibernate.format_sql", "true");
        properties.put("hibernate.connection.release_mode", "after_statement");
        return properties;
    }
}

总之，要解决“ConnectionReleaseModeException”错误，您需要检查您的连接释放模式或Hibernate版本。如果问题仍然存在，请查看Hibernate文档或寻求其他的帮助。