How to parse the below xml code?

Question

I have sale tag as child node that exists for multiple times but in that Employee tag doesn't exists for all sale tag.need to parse this xml.Got Null pointer exception when there is no employee tag.How to parse this xml even if some child tag name doesn't exists?

<?xml version="1.0" encoding="ISO-8859-1"?>
   <Transactions>
      <DocumentInfo TransferType="Transactions" Copyright="2010, Hectronic GmbH" CreatedBy="HecPoll">
       <CreateDate Year="2011" Month="7" Day="13"/>
       <CreateTime Hour="6" Minute="0" Second="16"/>
      </DocumentInfo>
      <DocumentData>
      <Sale RcpNum="151" Amount="228.760" Station="1" Customer="000003" Terminal="1">
        <Date Year="2011" Month="07" Day="12"/>
        <Time Hour="07" Minute="23" Second="00"/>
        <ArticleSale Quantity="6.020" SglPriceAsSold="38.000" SglPriceAsStored="38.000" SglPrice="38.000" Amount="228.760" FCCAmount="228.760" Taxrate="18" LogicalFPNumber="1" TankNumber="3" ArtNum="3" SaleNum="1"/>
        <Payment PAN="000000002117904490D" Amount="228.760" TenderCode="0" PayNum="1"/>
        <Employee Lastname="V KALYANI"/>
        <Vehicle LicensePlate="10K"/>
      </Sale>
      <Sale RcpNum="255" Amount="6650.000" Station="1" Customer="ZZZZZZ" Terminal="0">
        <Date Year="2011" Month="07" Day="12"/>
        <Time Hour="07" Minute="24" Second="00"/>
        <ArticleSale Quantity="175.000" SglPriceAsSold="38.000" SglPriceAsStored="38.000" SglPrice="38.000" Amount="6650.000" FCCAmount="6650.000" Taxrate="19" LogicalFPNumber="1" TankNumber="1" ArtNum="3" SaleNum="1"/>
        <Payment PAN="000000001885018677D" Amount="6650.000" TenderCode="0" PayNum="1"/>
      </Sale>
      <Sale RcpNum="152" Amount="3078.000" Station="1" Customer="000003" Terminal="1">
        <Date Year="2011" Month="07" Day="12"/>
        <Time Hour="07" Minute="27" Second="00"/>
        <ArticleSale Quantity="81.000" SglPriceAsSold="38.000" SglPriceAsStored="38.000" SglPrice="38.000" Amount="3078.000" FCCAmount="3078.000" Taxrate="18" LogicalFPNumber="1" TankNumber="3" ArtNum="3" SaleNum="1"/>
        <Payment PAN="000000002117928224D" Amount="3078.000" TenderCode="0" PayNum="1"/>
        <Employee Lastname="A MUNIYANDI"/>
        <Vehicle LicensePlate="10F"/>
      </Sale>
   </DocumentData>
</Transactions>

Thanks,

Show the XML snippet and the Java code where the NullPointerException occurs. — asgs
– asgs, Commented Mar 28, 2013 at 6:38
U can try to generate an xsd for it(manually or automaticly). with that, u can make it automaticly and ignore null values also instead of handling exceptions. — Neron
– Neron, Commented Mar 28, 2013 at 9:19

prasanth · Accepted Answer · 2013-03-28 07:01:35Z

2

I assume you are using dom parser. If you are using getElementsByTagName() method, it will return null if no such element found. You better check for null for Employee tag.

answered Mar 28, 2013 at 7:01

prasanth

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2 Comments

Simbu Over a year ago

how to check null for the employee tag?

prasanth Over a year ago

NodeList n = e.getElementsByTagName(name); // here e refers to Sale node if(NodeList != null ) // do whatever you want

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