Shulou(Shulou.com)06/01 Report--

This article mainly introduces how java throws an exception suitable for abstraction, which is introduced in great detail and has certain reference value. Interested friends must read it!

Throw an exception suitable for abstraction

The exception thrown should be related to the task performed by the caller. This article describes exception conversion (catching an exception and throwing another) and exception chain (wrapping an exception in a new exception to preserve the causal chain of the exception).

Private void serializeBillingDetails (BillingResult billingResult, BillingDetailsType billingDetails) {try {final JAXBContext context = JAXBContext .newInstance (BillingdataType.class); final ByteArrayOutputStream out = new ByteArrayOutputStream (); final Marshaller marshaller = context.createMarshaller (); marshaller.setProperty ("jaxb.formatted.output", Boolean.FALSE); final BillingdataType billingdataType = new BillingdataType (); billingdataType.getBillingDetails () .add (billingDetails) Marshaller.marshal (factory.createBillingdata (billingdataType), out); final String xml = new String (out.toByteArray (), "UTF-8"); billingResult.setResultXML (xml.substring (xml.indexOf (") + 13, xml.indexOf (")). Trim (); billingResult.setGrossAmount (billingDetails.getOverallCosts () .getGrossAmount ()) BillingResult.setNetAmount (billingDetails.getOverallCosts (). GetNetAmount ());} catch (JAXBException | UnsupportedEncodingException ex) {throw new BillingRunFailed (ex);}}

The above method catches JAXBException and UnsupportedEncodingException and rethrows a new exception appropriate to the level of method abstraction. The new BillingRunFailed exception wraps the original exception. So this is a good example of an anomaly chain. The advantage of exception chains is that they retain low-level exceptions that help debug problems.

The above is all the content of the article "how java throws exceptions suitable for abstraction". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.