How to download the xsd file, which is stored in the / WEB-INF folder

Question

I want to download the xsd file, which is stored in:

/WEB-INF/myxsd.xsd 

I will refer to this in my controller action, not sure how to do this.

Also, since I will be referencing this all the time, can I download it once as opposed to a query?

 public String create() { // load xsd file here } 

Are you using relative path or full path?

Update

I already have this code that needs an xsd file where I will check the circuit.

  SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); Schema schema = schemaFactory.newSchema(schemaFile); 

schemaFile is what I need to initialize the help, it seems that newSchema has several overloads (file, URI, etc.) , but this is a local file, so it makes sense to get the correct file ? Validator validator = schema.newValidator ();

I need help downloading this xsd file from the / Web-inf / folder.

Answer 1

ServletContext has a getRealPath () method. Thus, servletContext.getRealPath ("WEB-INF") will provide you with an absolute path to the WEB-INF directory.

Use ServletContext # getResourceAsStream ().

To load it only once per request, you can create a field and load it lazily.

But it would be even better to load it as a context attribute using a lifecycle listener.

Answer 2

IMHO, Spring's way is to inject SchemaFactory and Resource into the controller and initialize the schema only once. Notabene According to Javadocs Schema is thread safe.

 public class MyController ... implements InitializingBean { private SchemaFactory schemaFactory; private Schema schema; private Resource schemaResource; public void setSchemaFactory(SchemaFactory schemaFactory) { this.schemaFactory = schemaFactory; } public void setSchemaResource(Resource schemaResource) { this.schemaResource = schemaResource; } public void afterPropertiesSet() throws Exception { Source xsdSource = new StreamSource(schemaResource.getInputStream()); schema = schemaFactory.newSchema(xsdSource); } public void create() { // use schema } } 

And Spring config:

 <bean id="schemaFactory" class="javax.xml.validation.SchemaFactory" factory-method="newInstance"> <constructor-arg> <util:constant static-field="javax.xml.XMLConstants.W3C_XML_SCHEMA_NS_URI"/> </constructor-arg> </bean> <bean id="myController" class="...MyController"> <property name="schemaFactory" ref="schemaFactory" /> <property name="resource" value="/WEB-INF/myxsd.xsd" /> </bean>