Question

我在Spring 4中使用Hibernate 4.我创建了自己的会话工厂并使用了Hibernate事务管理器。保存后检索数据时遇到问题。我使用ProcedureCall保存数据，并在每个方法中打开会话并关闭会话。问题是什么？如果我删除session.close（），那么它工作正常。

public Map<String, Object> savePurchaseOrderInvoiceDetail(String dataString, String order_no,String event, HttpSession hs) throws SQLException, ParseException {
    HibernateTransactionManager htmLocal = (HibernateTransactionManager) hs.getAttribute("HibernateTransactionManager");
    Session session = htmLocal.getSessionFactory().openSession();
    Transaction tx = getTransaction(session);
    ProcedureCall qry = session.createStoredProcedureCall("purchase_order_invoice_api");
    qry.registerParameter(0, String.class, ParameterMode.IN).bindValue(event);
    qry.registerParameter(1, String.class, ParameterMode.IN).bindValue(dataString);
    qry.registerParameter(2, String.class, ParameterMode.OUT);
    qry.registerParameter(3, String.class, ParameterMode.OUT);
    qry.registerParameter(4, Integer.class, ParameterMode.OUT);
    qry.registerParameter(5, String.class, ParameterMode.OUT);
    ProcedureOutputs output = qry.getOutputs();

    String msg = (String) output.getOutputParameterValue(2);
    String voucheNo=(String) output.getOutputParameterValue(3);
    int invoiceId=(int) output.getOutputParameterValue(4);
    String status=(String) output.getOutputParameterValue(5);

    Map<String, Object>map=new HashMap<String, Object>();
    map.put("msg", msg);
    map.put("voucherNo", voucheNo);
    map.put("lastInvoiceId", invoiceId);
    map.put("status", status);

    tx.commit();

    session.close();
    return map;
}

public Map<String, Object> getInvoiceDetails(String invoicedId,HttpSession hs) throws Exception{
    HibernateTransactionManager htmLocal = (HibernateTransactionManager) hs.getAttribute("HibernateTransactionManager");
    Session session = htmLocal.getSessionFactory().openSession();

    final Map<String, Object>map=new HashMap<String, Object>();

    String company=(String) hs.getAttribute("company");
    int invoiceIdInt=Integer.valueOf(invoicedId);


    String qry = "select inv.*,get_supplier_name(inv.Company,inv.Identity) AS CUSTOMER_NAME from invoice_tab inv";
    Query query = session.createSQLQuery(qry).addEntity(Invoice.class);
    query.setCacheable(false);

    List<Invoice> invoiceList = query.list();

    for (int i = 0; i < invoiceList.size(); i++) {
        Invoice invoiceObj=invoiceList.get(i);

        //Business logic
    }

    session.close();
    return map;
}

Answer 1

您正在努力使用Spring，更不用说您拥有一个服务（或者可能是存储库）这一事实，这取决于它是一个Web应用程序。两件事都很糟糕。

将@Transactional注释添加到包含这些方法的类中，并启用注释驱动的事务管理。而不是绕过HttpSession只是注入您的依赖项，在这种情况下是SessionFactory。

不要自己创建会话使用当前会话，即sessionFactory.getCurrentSession()来获取事务会话。

@Service
@Transactional
public class YourService {

    private final SessionFactory sessionFactory;

    public YourService(SessionFactory sf) {
        this.sessionFactory=sf;
    }


    public Map<String, Object> savePurchaseOrderInvoiceDetail(String dataString, String order_no,String event) throws SQLException, ParseException {
        Session session = sessionFactory.getCurrentSession();
        ProcedureCall qry = session.createStoredProcedureCall("purchase_order_invoice_api");
        qry.registerParameter(0, String.class, ParameterMode.IN).bindValue(event);
        qry.registerParameter(1, String.class, ParameterMode.IN).bindValue(dataString);
        qry.registerParameter(2, String.class, ParameterMode.OUT);
        qry.registerParameter(3, String.class, ParameterMode.OUT);
        qry.registerParameter(4, Integer.class, ParameterMode.OUT);
        qry.registerParameter(5, String.class, ParameterMode.OUT);
        ProcedureOutputs output = qry.getOutputs();

        String msg = (String) output.getOutputParameterValue(2);
        String voucheNo=(String) output.getOutputParameterValue(3);
        int invoiceId=(int) output.getOutputParameterValue(4);
        String status=(String) output.getOutputParameterValue(5);

        Map<String, Object>map=new HashMap<String, Object>();
        map.put("msg", msg);
        map.put("voucherNo", voucheNo);
        map.put("lastInvoiceId", invoiceId);
        map.put("status", status);

        return map;
    }

    public Map<String, Object> getInvoiceDetails(int invoicedId, String company) throws Exception{
        Session session = sessionFactory.getCurrentSession();

        final Map<String, Object>map=new HashMap<String, Object>();

        String qry = "select inv.*,get_supplier_name(inv.Company,inv.Identity) AS CUSTOMER_NAME from invoice_tab inv";
        Query query = session.createSQLQuery(qry).addEntity(Invoice.class);
        query.setCacheable(false);

        List<Invoice> invoiceList = query.list();

        for (int i = 0; i < invoiceList.size(); i++) {
            Invoice invoiceObj=invoiceList.get(i);

            //Business logic
        }

        return map;
    }
}

如上所述。

我真正得到的是为什么你甚至使用hibernate，因为你正在创建自己的查询而不使用HQL或任何东西来获取实体。你唯一使用hibernate的是映射，也可以用普通的SQL来完成，为你的sql结果映射添加hibernate只是为了在我的书中有点矫枉过正。

在hibernate 4中保存到数据库后，数据无法检索

1 个答案: