How to use Jakarta SOAP with Attachments API in the Java class library to implement SOAP message transmission

The use of Jakarta SOAP with Attachments API to implement SOAP message transmission is a method that uses the SOAP protocol in the Java application for data transmission.SOAP (simple object access protocol) is a protocol for data exchange on the network. It allows software components to send and receive structured information through HTTP or other protocols. To use Jakarta Soap with Attachments API, you must first make sure you have installed the Java Development Tool Pack (JDK).Then, you need to use the Java code to create and send SOAP requests, as well as parsing and processing the received SOAP response. The following is an example, showing how to use Jakarta Soap with Attachments API to send SOAP requests in Java: import java.io.ByteArrayOutputStream; import java.net.URL; import javax.xml.soap.MessageFactory; import javax.xml.soap.SOAPConnection; import javax.xml.soap.SOAPConnectionFactory; import javax.xml.soap.SOAPMessage; public class SOAPClient { public static void main(String[] args) throws Exception { // Create SOAP connection factory SOAPConnectionFactory soapConnectionFactory = SOAPConnectionFactory.newInstance(); SOAPConnection soapConnection = soapConnectionFactory.createConnection(); // Create a URL object URL url = new URL("http://example.com/soap-endpoint"); // Create a SOAP message factory MessageFactory messageFactory = MessageFactory.newInstance(); SOAPMessage soapMessage = messageFactory.createMessage(); // Construct a SOAP request // Add the necessary SOAP head, subject and other information // Here the steps of omittable SOAP construction steps // Send SOAP request and receive response SOAPMessage soapResponse = soapConnection.call(soapMessage, url); // Treatment SOAP response // Analyze the data in the response message // Here the specific response processing steps are omitted // Turn off the connection soapConnection.close(); } } In the above code, we first created the SOAP connection factory and SOAP connection.Then, we created a URL object to specify the address of the SOAP server.Next, we use the SOAP message factory to create a SOAP message.We can further use the SOAP message factory to build SOAP requests, such as adding SOAP heads and subjects. Once the SOAP request is ready, we will use the Soap connection to send the request and receive the SOAP response returned by the server.We can use the same method to parse and process SOAP responses and extract the data in it. Finally, we turn off the SOAP connection. In short, using Jakarta SOAP with Attachments API can easily implement SOAP messages in Java applications.By constructing and sending SOAP requests, and parsing and processing SOAP response, you can communicate with other services using the SOAP protocol in the application.