JavaでのSOAP通信の簡易実装ガイド(javax.xml.soap)

import javax.xml.soap.*;

public class SoapClient {

    public static void main(String[] args) {
        try {
            // SOAPメッセージのファクトリを作成
            SOAPConnectionFactory soapConnectionFactory = SOAPConnectionFactory.newInstance();
            SOAPConnection soapConnection = soapConnectionFactory.createConnection();

            // WebサービスのエンドポイントURL
            String url = "http://localhost:8080/yourWebServiceEndpoint";

            // SOAPメッセージを作成
            SOAPMessage soapRequest = createSOAPRequest();

            // WebサービスにSOAPメッセージを送信
            SOAPMessage soapResponse = soapConnection.call(soapRequest, url);

            // レスポンスメッセージの内容を表示
            System.out.println("Response SOAP Message:");
            soapResponse.writeTo(System.out);

            // 接続を閉じる
            soapConnection.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static SOAPMessage createSOAPRequest() throws SOAPException {
        // SOAPメッセージのファクトリを作成
        MessageFactory messageFactory = MessageFactory.newInstance();
        SOAPMessage soapMessage = messageFactory.createMessage();

        // SOAPパートを取得
        SOAPPart soapPart = soapMessage.getSOAPPart();

        // SOAPエンベロープを取得
        SOAPEnvelope envelope = soapPart.getEnvelope();
        envelope.addNamespaceDeclaration("example", "http://example.com/");

        // SOAPボディを取得
        SOAPBody soapBody = envelope.getBody();
        SOAPBodyElement soapBodyElement = soapBody.addChildElement("GetUserRequest", "example");
        soapBodyElement.addChildElement("userId").addTextNode("123");

        // メッセージを保存
        soapMessage.saveChanges();

        // メッセージを表示（デバッグ用）
        System.out.println("Request SOAP Message:");
        soapMessage.writeTo(System.out);
        System.out.println();

        return soapMessage;
    }
}

import javax.jws.WebMethod;
import javax.jws.WebService;
import javax.jws.soap.SOAPBinding;

@WebService
@SOAPBinding(style = SOAPBinding.Style.RPC)
public interface UserService {
    @WebMethod
    User getUser(String userId);
}

class UserServiceImpl implements UserService {
    @Override
    public User getUser(String userId) {
        // ダミーのユーザー情報を返す
        return new User("John Doe", "john.doe@example.com");
    }
}

class User {
    private String name;
    private String email;

    public User(String name, String email) {
        this.name = name;
        this.email = email;
    }

    // GetterとSetter
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public String getEmail() { return email; }
    public void setEmail(String email) { this.email = email; }
}

import javax.xml.ws.Endpoint;

public class SoapServer {
    public static void main(String[] args) {
        Endpoint.publish("http://localhost:8080/yourWebServiceEndpoint", new UserServiceImpl());
        System.out.println("SOAP Web Service is published!");
    }
}