一、pom.xml

        <!-- OKHttp -->
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>3.14.9</version>
        </dependency>

二、源码实现

import tech.powerjob.common.exception.PowerJobException;
import okhttp3.*;

import java.io.IOException;
import java.util.concurrent.TimeUnit;

/**
 * 封装 OkHttpClient
 *
 * @author tjq
 * @since 2020/4/6
 */
public class HttpUtils {

    private static final OkHttpClient client;
    private static final int HTTP_SUCCESS_CODE = 200;

    static {
        client = new OkHttpClient.Builder()
                .connectTimeout(1, TimeUnit.SECONDS)
                .readTimeout(5, TimeUnit.SECONDS)
                .build();
    }

    public static String get(String url) throws IOException {
        Request request = new Request.Builder()
                .get()
                .url(url)
                .build();
        return execute(request);
    }

    public static String post(String url, RequestBody requestBody) throws IOException {
        Request request = new Request.Builder()
                .post(requestBody)
                .url(url)
                .build();
        return execute(request);
    }

    private static String execute(Request request) throws IOException {
        try (Response response = client.newCall(request).execute()) {
            int responseCode = response.code();
            if (responseCode == HTTP_SUCCESS_CODE) {
                ResponseBody body = response.body();
                if (body == null) {
                    return null;
                }else {
                    return body.string();
                }
            }
            throw new PowerJobException(String.format("http request failed,code=%d", responseCode));
        }
    }

}

三、使用示例

post请求

RequestBody body = new FormBody.Builder()
                .add("wfInstanceId", wfInstanceId.toString())
                .add("appId", appId.toString())
                .build();

String res = HttpUtils.post(url, requestBody);

get 请求

HttpUtils.get(url)