如何处理 org.hibernate.exception.ConstraintViolationException，我使用 try catch 但它不起作用

Question

此方法用于将数据保存在数据库中

public Response saveAll(PurchaseOrderHeaderDto purchaseOrderHeaderDto){
    try{
        s=sf.openSession();
        tx=s.beginTransaction();
        PurchaseOrderHeader orderDo=importDao(purchaseOrderHeaderDto);
        for(int i=0;i<orderDo.getPurchaseItemList().size(); i++){
            orderDo.getPurchaseItemList().get(i).setHeaderDetails(orderDo);
            s.save(orderDo.getPurchaseItemList().get(i));
        }
        response.setStatus(200);
        response.setMessage("succesfull");
        tx.commit();

    }
    catch(ConstraintViolationException  e){
    System.out.println(e.getMessage());
        response.setStatus(500);
        response.setMessage("unsuccesfull");
        tx.rollback();

    }
    finally{
        s.close();
    }
    return response;
}

I am getting this error

 Error during managed flush [org.hibernate.exception.DataException: could not execute statement]

我不知道如何处理这个异常（我知道这是因为长度，但我想处理这个异常。欢迎提出任何建议）

Answer 1

因为您在获取DataException 时试图捕捉ConstraintViolationException。 尝试使用以下代码：

public Response saveAll(PurchaseOrderHeaderDto purchaseOrderHeaderDto) {
    try {
        s = sf.openSession();
        tx = s.beginTransaction();
        PurchaseOrderHeader orderDo = importDao(purchaseOrderHeaderDto);
        for (int i = 0; i < orderDo.getPurchaseItemList().size(); i++) {
            orderDo.getPurchaseItemList().get(i).setHeaderDetails(orderDo);
            s.save(orderDo.getPurchaseItemList().get(i));
        }
        response.setStatus(200);
        response.setMessage("succesfull");
        tx.commit();

    } catch (Exception e) {
        System.out.println(e.getMessage());
        response.setStatus(500);
        response.setMessage("unsuccesfull");
        tx.rollback();

    } finally {
        s.close();
    }
    return response;
}

这将捕获每个异常，您可能希望稍后再处理它，但它应该可以工作