Apex Developer Guide

Apex Developer Guide
Getting Started with Apex
Writing Apex
Running Apex
Invoking Apex
Apex Transactions and Governor Limits
Using Salesforce Features with Apex
Integration and Apex Utilities
Invoking Callouts Using Apex
JSON Support
XML Support
Reading and Writing XML Using Streams
Reading XML Using Streams
Writing XML Using Streams
Reading and Writing XML Using the DOM
Securing Your Data
Encoding Your Data
Using Patterns and Matchers
Debugging, Testing, and Deploying Apex
Apex Language Reference
Appendices
Glossary
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Writing XML Using Streams

The XmlStreamWriter class methods enable the writing of XML data.
Those methods are used in conjunction with HTTP callouts to construct an XML document to send in the callout request to an external service. The following example shows how to instantiate a new XmlStreamReader object:

XML Writer Methods Example

The following example writes an XML document and tests its validity.

This Hello World sample requires custom objects. You can either create these on your own, or download the objects and Apex code as an unmanaged package from the Salesforce AppExchange. To obtain the sample assets in your org, install the Apex Tutorials Package. This package also contains sample code and objects for the Shipping Invoice example.