To generate an XML output in the specified format using Spring Boot and Java, you can make use of the Java XML APIs, such as the `javax.xml.parsers.DocumentBuilder` and `org.w3c.dom.Document` classes. Here's an example of how you can achieve this:
```java
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import java.text.SimpleDateFormat;
import java.util.Date;
public class XmlGenerator {
public static void main(String[] args) {
// Create a new XML document
Document document = createXmlDocument();
// Generate the root element <Head>
Element headElement = document.createElement("Head");
headElement.setAttribute("ver", "1.0");
headElement.setAttribute("ts", getCurrentTimestamp());
headElement.setAttribute("orgId", "ABL");
headElement.setAttribute("msgId", "1");
// Append the <Head> element to the document
document.appendChild(headElement);
// Convert the document to an XML string
String xmlString = convertDocumentToString(document);
System.out.println(xmlString);
}
private static Document createXmlDocument() {
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
return builder.newDocument();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
private static String getCurrentTimestamp() {
SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss a");
return dateFormat.format(new Date());
}
private static String convertDocumentToString(Document document) {
try {
// Create a transformer to convert the document to string
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
// Set properties to format the XML output
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
// Create a string writer to capture the XML output
StringWriter stringWriter = new StringWriter();
StreamResult streamResult = new StreamResult(stringWriter);
// Transform the document to string
transformer.transform(new DOMSource(document), streamResult);
// Return the XML string
return stringWriter.toString();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
```
In this example, the `createXmlDocument()` method creates a new XML document using the `DocumentBuilder` and `DocumentBuilderFactory` classes. The `getCurrentTimestamp()` method retrieves the current timestamp in the desired format. The `convertDocumentToString()` method converts the generated document to a string representation using the `Transformer` class.
When you run the `main` method, it will generate the XML output in the specified format:
```xml
<Head ver="1.0" ts="07/04/2023 10:26:51 PM" orgId="ABL" msgId="1"/>
```
Please note that you need to import the necessary classes (`Document`, `Element`, `DocumentBuilderFactory`, `DocumentBuilder`, `SimpleDateFormat`, etc.) and handle any exceptions that may occur during XML generation.
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