在WireMock中编码响应中的特殊字符，可以使用Java中的URLEncoder类来进行编码。下面是一个示例代码：

import com.github.tomakehurst.wiremock.WireMockServer;
import com.github.tomakehurst.wiremock.client.WireMock;
import org.apache.http.HttpStatus;
import java.net.URLEncoder;

public class WireMockResponseEncodingExample {

    public static void main(String[] args) throws Exception {
        WireMockServer wireMockServer = new WireMockServer();
        wireMockServer.start();

        WireMock.configureFor(wireMockServer.port());

        // 设置WireMock的响应
        WireMock.stubFor(WireMock.get(WireMock.urlEqualTo("/special-characters"))
                .willReturn(WireMock.aResponse()
                        .withStatus(HttpStatus.SC_OK)
                        .withBody(URLEncoder.encode("特殊字符: <>\"&", "UTF-8"))));

        // 发送HTTP GET请求到WireMock服务器
        String response = org.apache.http.client.fluent.Request.Get("http://localhost:" + wireMockServer.port() + "/special-characters")
                .execute()
                .returnContent()
                .asString();

        System.out.println(response);

        wireMockServer.stop();
    }
}

在上述代码中，我们使用URLEncoder.encode方法将特殊字符进行URL编码，然后将编码后的字符串作为响应体返回给客户端。在客户端发起HTTP请求时，客户端会自动解码响应体中的URL编码字符，以获取原始的特殊字符。