JAVA DOM解析器解析XML文档

Question

I need to get some data from XML document and I am using XML parser. I was following this procedure and there is part of code:

File inputFile = new File("input.txt");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);

After this there is more traversing in XML document and getting data. Since methods newDocumentBuilder() and parse() throws exceptions, they need to be placed inside try-catch block. My question is : Should I put all my code inside try-catch block (also traversing and getting informations from XML - like in example on tutorialspoint.com), or can I put inside try-catch only these two methods:

DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);

What is the right solution?

Thanks!

Answer 1

You should handle the exception that are thrown from other call or declare it on your method. The approach I always follow is to identify if an exception is thrown by programmer vs jvm and try to write programmer thrown exception inside try-catch block, this way I always have a benefit of adding custom code in catch block, it could be anything like adding some logging, etc to help debug your program when such exceptions are caught.