Hibernate AnnotationSessionFactoryBean 获取sessionFactory问题

Question

[b]
[color=red]下面的代码中，getSessionFactory方法中a.getObject()返回的值为null.请问是应该怎么解决啊？？？[/color]
[/b]

[code="java"]

@SuppressWarnings("unchecked")
@Configuration
@Component
public class AppConfig implements ServletConfigAware,ServletContextAware{

//hibernate(读取配置文件中的值) 
private @Value("${hibernate.dialect}") String dialect; 
private @Value("${hibernate.show_sql}") String showSql;
private @Value("${hibernate.hbm2ddl.auto}") String hbm2ddl;
private @Value("${hibernate.default_schema}") String default_schema;
private @Value("${hibernate.max_fetch_depth}") String max_fetch_depth;
private @Value("${hibernate.query.factory_class}")String query_factory_class;
//jdbc
private @Value("${jdbc.driverClass}") String driverClass;
private @Value("${jdbc.url}") String jdbcUrl;
private @Value("${jdbc.user}") String user;
private @Value("${jdbc.password}") String password;

//c3p0
private @Value("${c3p0.minPoolSize}") int minPoolSize;
private @Value("${c3p0.maxPoolSize}") int maxPoolSize;
private @Value("${c3p0.initialPoolSize}") int initialPoolSize;
private @Value("${c3p0.maxIdleTime}") int maxIdleTime;
private @Value("${c3p0.maxStatements}") int maxStatements;
private @Value("${c3p0.acquireIncrement}") int acquireIncrement;
private @Value("${c3p0.idleConnectionTestPeriod}") int idleConnectionTestPeriod;
private @Value("${c3p0.acquireRetryAttempts}") int acquireRetryAttempts;
private @Value("${c3p0.breakAfterAcquireFailure}") boolean breakAfterAcquireFailure;

//mail
private @Value("${mail.host}") String host;
private @Value("${mail.username}") String username;
private @Value("${mail.password}") String mailpwd;
private @Value("${mail.smtp.auth}") String smtpAuth;
private @Value("${mail.smtp.timeout}") String smtpTimeout;

private @Value("${system.hibernate.models}") String models;     //hibernate扫描的包

private ApplicationContext applicationContext;


public ApplicationContext getApplicationContext() {
    return applicationContext;
}

public void setApplicationContext(ApplicationContext applicationContext) {
    this.applicationContext = applicationContext;
}

//数据源
@Bean(name="dataSource")
public DataSource getDataSource(){
    ComboPooledDataSource cpds = new ComboPooledDataSource(); 
    cpds.setJdbcUrl(jdbcUrl);
    try {
        cpds.setDriverClass(driverClass);
    } catch (PropertyVetoException e) {
        e.printStackTrace();
    }
    cpds.setUser(user);
    cpds.setPassword(password);

    //连接池中保留的最小连接数
    cpds.setMinPoolSize(minPoolSize);
    //连接池中保留的最大连接数。Default: 15
    cpds.setMaxPoolSize(maxPoolSize);
    //初始化时获取的连接数，取值应在minPoolSize与maxPoolSize之间。Default: 3
    cpds.setInitialPoolSize(initialPoolSize);
    //最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0
    cpds.setMaxIdleTime(maxIdleTime);
    //当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3
    cpds.setAcquireIncrement(acquireIncrement);
    //每60秒检查所有连接池中的空闲连接。Default: 0
    cpds.setIdleConnectionTestPeriod(idleConnectionTestPeriod);
    //定义在从数据库获取新连接失败后重复尝试的次数。Default: 30
    cpds.setAcquireRetryAttempts(acquireRetryAttempts);
    //获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效保留，并在下次调用getConnection()的时候继续尝试获取连接。如果设为true，那么在尝试获取连接失败后该数据源将申明已断开并永久关闭。Default: false-->
    cpds.setBreakAfterAcquireFailure(breakAfterAcquireFailure);
    cpds.setMaxStatements(maxStatements);

    return cpds;
}

//Hibernate - SessionFactory
@Bean(name="sessionFactory")
@DependsOn("dataSource")
public SessionFactory getSessionFactory() throws Exception { 
    Properties properties = new Properties();
    properties.put("hibernate.dialect", dialect);
    /**
    properties.put("hibernate.show_sql", showSql);
    properties.put("hibernate.hbm2ddl.auto", hbm2ddl);
    properties.put("hibernate.max_fetch_depth", max_fetch_depth);
    properties.put("hibernate.temp.use_jdbc_metadata_defaults", "false");  
    properties.put("hibernate.jdbc.fetch_size", "50");
    properties.put("hibernate.jdbc.batch_size", "25"); */

    AnnotationSessionFactoryBean a = new AnnotationSessionFactoryBean(); 
    a.setDataSource(this.getDataSource());
    a.setHibernateProperties(properties);  
    a.setPackagesToScan(models.split(","));

    SessionFactory sessionFactory = a.getObject();
    System.out.println("dataSource = "+this.getDataSource());
    System.out.println("sessionFactory = "+sessionFactory);
    return sessionFactory;

}

public void setServletConfig(ServletConfig config) {

}

@Override
public void setServletContext(ServletContext arg0) {

}

}

[/code]

Answer 1

你需要先调用afterPropertiesSet 再调用getObject