SOAP（Simple Object Access Protocol）和REST（Representational State Transfer）是两种不同的Web服务通信协议，因此它们的接口工具类实现也有一些差异。

以下是一个简单的Java代码实现SOAP接口工具类的示例：

import javax.xml.namespace.QName;
import javax.xml.soap.*;

public class SoapClientUtil {

    private final String endpoint;
    private final String namespace;
    private boolean validate = false;

    public SoapClientUtil(String endpoint, String namespace) {
        this.endpoint = endpoint;
        this.namespace = namespace;
    }

    public void setValidate(boolean validate) {
        this.validate = validate;
    }

    public SOAPMessage sendMessage(String methodName, Object... params) throws Exception {
        
        // Create a SOAP message
        MessageFactory factory = MessageFactory.newInstance();
        SOAPMessage soapMessage = factory.createMessage();

        // Add SOAP envelope, header, and body elements
        SOAPEnvelope envelope = soapMessage.getSOAPPart().getEnvelope();
        if (validate) {
            envelope.addNamespaceDeclaration("xsd", "http://www.w3.org/2001/XMLSchema");
            envelope.addNamespaceDeclaration("xsi", "http://www.w3.org/2001/XMLSchema-instance");
            envelope.addNamespaceDeclaration("SOAP-ENC", "http://schemas.xmlsoap.org/soap/encoding/");
            envelope.setAttributeNS("http://www.w3.org/2001/XMLSchema-instance", "noNamespaceSchemaLocation", "uss.xsd");
        }
        SOAPHeader header = envelope.getHeader();
        SOAPBody body = envelope.getBody();

        // Create the SOAP body message
        QName bodyName = new QName(namespace, methodName);
        SOAPBodyElement bodyElement = body.addBodyElement(bodyName);

        if (params != null) {
            for (Object param : params) {
                QName paramName = new QName(param.getClass().getName());
                SOAPElement soapElement = bodyElement.addChildElement(paramName);
                soapElement.setTextContent(param.toString());
            }
        }

        // Send the SOAP message to the endpoint and receive a response
        SOAPConnectionFactory connectionFactory = SOAPConnectionFactory.newInstance();
        SOAPConnection connection = connectionFactory.createConnection();
        SOAPMessage response = connection.call(soapMessage, endpoint);
        connection.close();

        return response;
    }
}

以下是一个简单的Java代码实现REST接口工具类的示例：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class RestClientUtil {

    private final String endpoint;

    public RestClientUtil(String endpoint) {
        this.endpoint = endpoint;
    }

    public String sendRequest(String method, String... params) throws Exception {
        
        // Build the request URL
        StringBuilder urlBuilder = new StringBuilder(endpoint);
        if (params != null && params.length > 0) {
            urlBuilder.append("?");
            for (int i = 0; i < params.length; i += 2) {
                urlBuilder.append(params[i]);
                urlBuilder.append("=");
                urlBuilder.append(params[i+1]);
                if (i < params.length - 2) {
                    urlBuilder.append("&");
                }
            }
        }
        URL url = new URL(urlBuilder.toString());

        // Open a connection using the specified HTTP method
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod(method);

        // Read the response from the server
        StringBuilder response = new StringBuilder();
        BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String line;
        while ((line = rd.readLine()) != null) {
            response.append(line);
        }
        rd.close();

        // Close the HTTP connection
        conn.disconnect();

        return response.toString();
    }
}

需要注意的是，这些示例代码只实现了最基本的功能，实际使用时可能需要根据具体情况进行修改和扩展。同时还需要注意安全性和性能等方面的问题，例如SSL证书验证、连接池管理和结果缓存等。