Java 循环中的嵌套准备语句执行引发 DSRA9110e。语句已关闭。错误

Question

我正在使用 JSF 2 和 Oracle 11gR2，我的应用程序部署在 Websphere 8.5 上。我有以下代码在提到的行号处抛出主题错误。我使用了两种解决方案，但都会抛出相同的错误。

public void insertEmployee(List<Employee> empList) throws SQLException
{
    Session sess = HibernateUtil.currentSession();
    Connection cn = sess.connection();
    String sqlIdentifier = "insert into EMP_DTLS (ID, EMP_NAME, ORG_NAME) values (?, ?, ?)";
    PreparedStatement statement = cn.prepareStatement(sqlIdentifier);
    cn.setAutoCommit(false);
    Employer em =(Employer) sess.get(Employer.class, empList.get(0).getEmployerId());

       for (Employee currEmployee: empList)
       {           
       statement.setLong(1,getEmpNewId(cn,sess));   // ERROR ON THIS LINE
       statement.setString(2,currEmployee.getEmpName()); 
        statement.setString(3, em.getName());
        statement.addBatch();
        }
        try 
        {    
           statement.executeBatch();
        }
       catch (Exception ex)
    {
        ex.printStackTrace();
        cn.rollback();
    }
    finally
    {
            cn.commit();
            statement.close();
            statement = null;
    }   
    } 
    public Long getEmpNewId(Connection cn, Session sess) throws SQLException
    {
    long empId = 1;
    String sqlIdentifier = "select SEQ_EMP_DTLS_ID.NEXTVAL from dual";
    PreparedStatement statement = null;
    statement = cn.prepareStatement(sqlIdentifier);
    synchronized( this ) 
    {
       ResultSet rs;
    try {
        rs = statement.executeQuery();
        if(rs.next())  empId = rs.getLong(1);
        statement.close();
        statement = null;
        sqlIdentifier = null;
    } catch (SQLException e) {
        e.printStackTrace();
    }

    }
     return empId;
}

我也使用了以下解决方案，但同样的错误：-

public void insertEmployee(List<Employee> empList) throws SQLException
{
    Session sess = HibernateUtil.currentSession();
    Connection cn = sess.connection();

    String sqlIdentifier = "insert into EMP_DTLS "
            + "(ID, EMP_NAME, ORG_NAME)"
            + "values (SEQ_EMP_DTLS_ID.NEXTVAL, ?, ?)";
    PreparedStatement statement = cn.prepareStatement(sqlIdentifier);
    cn.setAutoCommit(false);
      Employer em =(Employer) sess.get(Employer.class, empList.get(0).getEmployerId());  

       for (Employee currEmployee: empList)
       {           
          statement.setString(1,currEmployee.getEmpName()); // Error on this line 
          statement.setString(2, em.getName());
          statement.addBatch();
        }
      ....

这是错误:-

com.ibm.websphere.ce.cm.objectclosedexception dsra9110e statement is closed

我做错了什么。

Answer 1

可能连接在休眠调用结束时关闭（或返回到池中），因此语句也关闭了。我的建议是在休眠中使用 nativeQuery，而不是使用 jdbc。改变 hibernate 给你的连接也是不好的做法 (setAutocommit)

Java 循环中的嵌套准备语句执行引发 DSRA9110e。语句已关闭。错误

Nested Prepared Statement Execution in Java loop throwing DSRA9110e. Statement is Closed. error

websphere

hibernate

prepared-statement