Spring容器初始化数据（数据库）BeanPostProcessor的应用

public class PropUtil implements BeanPostProcessor{
    
    public static Map<String, Object> map = new HashMap<String, Object>();
    
    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        if("dataSource".equals(beanName)){
            DataSource ds = (DataSource)(bean);
            Connection conn = null;
　　　　　　　PreparedStatement pm = null;
            try {
                conn = ds.getConnection();
                pm = conn.prepareStatement("select * from model");
                ResultSet rs = pm.executeQuery();
                while(rs.next()){
                    System.out.println(rs.getString("modelId"));
                    System.out.print(rs.getString("modelName"));//这里可以针对于不同的数据，保存在对应的map中做静态数据加载，方便其他方法调用
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }finally {
                try {
                    conn.close();
　　　　　　　　　　　 pm.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }                
            }
        }
        return bean;
    }

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        return bean;
    }
    
}