OkHttp工具类

<!-- https://mvnrepository.com/artifact/com.squareup.okhttp3/okhttp -->
<dependency>
   <groupId>com.squareup.okhttp3</groupId>
   <artifactId>okhttp</artifactId>
   <version>4.2.2</version>
</dependency>

package dhht.seal.hn.gate.util;

import okhttp3.OkHttpClient;

import java.util.concurrent.TimeUnit;

/**
 * @author sh
 */
public enum OkHttpClientEnum {
    INSTANCE;
    private OkHttpClient client;

    private OkHttpClientEnum() {
        client = new OkHttpClient.Builder().connectTimeout(30, TimeUnit.SECONDS)
                .writeTimeout(30, TimeUnit.SECONDS).readTimeout(30, TimeUnit.SECONDS
                ).retryOnConnectionFailure(false)
                .build();
    }

    public OkHttpClient getInstance() {
        return client;
    }
}

package dhht.seal.hn.gate.util;

import com.alibaba.fastjson.JSON;
import dhht.seal.hn.gate.vo.ResultVO;
import lombok.extern.slf4j.Slf4j;
import okhttp3.*;

import java.io.File;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @Author: sh
 * @Description: OkHttpUtil
 * @Date: 2020/08/28
 */
@Slf4j
public class OkHttpUtil {

    private static final String JSON_PRODUCES = "application/json; charset=utf-8";

    private static final String FORM_PRODUCES = "multipart/form-data; charset=utf-8";

    private static OkHttpClient client = new OkHttpClient.Builder().connectTimeout(30, TimeUnit.SECONDS)
            .writeTimeout(30, TimeUnit.SECONDS).readTimeout(30, TimeUnit.SECONDS
            ).retryOnConnectionFailure(false)
            .build();

    public static String get(String url) {
        //OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url(url)
                .build();
        Call call = OkHttpClientEnum.INSTANCE.getInstance().newCall(request);
        String result = null;
        try {
            Response response = call.execute();
            ResponseBody body = response.body();
            if (null != response) {
                result = response.body().string();
            }
            return result;
        } catch (Exception e) {
            log.error(e.getMessage());
            return result;
        } finally {
        }
    }

    @Deprecated
    public static String post(String url, String json) {
        MediaType mediaType = MediaType.parse(JSON_PRODUCES);
        //OkHttpClient client = new OkHttpClient();
        RequestBody body = RequestBody.create(mediaType, json);
        String result = null;
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .build();
        try {
            Call call = OkHttpClientEnum.INSTANCE.getInstance().newCall(request);
            Response response = call.execute();
            if (null != response) {
                result = response.body().string();
            }
            return result;
        } catch (Exception e) {
            log.error(e.getMessage());
            return result;
        } finally {
        }
    }

    @Deprecated
    public static ResultVO postWithHead(String url, String json, String apiKey, String apiVal) {
        ResultVO resultVO = null;
        try {
            MediaType mediaType = MediaType.parse(JSON_PRODUCES);
            //OkHttpClient client = new OkHttpClient();
            RequestBody body = RequestBody.create(mediaType, json);
            String result = null;
            Request request = new Request.Builder()
                    .url(url).addHeader(apiKey, apiVal)
                    .post(body)
                    .build();
            Call call = OkHttpClientEnum.INSTANCE.getInstance().newCall(request);
            Response response = call.execute();
            if (null != response) {
                result = response.body().string();
                resultVO = JSON.parseObject(result, ResultVO.class);
            }
            return resultVO;
        } catch (Exception e) {
            log.error(e.getMessage());
            resultVO = new ResultVO(-1, e.getMessage(), null);
            return resultVO;
        } finally {
        }
    }


    public static String getWithHeader(String url, String apiKey, String apiVal) {
        String result = null;
        try {
            Request request = new Request.Builder().addHeader("Connection", "close")
                    .url(url)
                    .header(apiKey, apiVal)
                    .build();
            Call call = OkHttpClientEnum.INSTANCE.getInstance().newCall(request);
            Response response = call.execute();
            ResponseBody body = response.body();
            if (null != body) {
                result = body.string();
            }
            return result;
        } catch (Exception e) {
            log.error(e.getMessage());
            return result;
        }
    }

    @Deprecated
    public static ResultVO pushFile(String url, List<String> pathList, Map<String, String> params, String apiKey, String apiVal) {
        ResultVO resultVO = null;
        try {
            MediaType MutilPart_Form_Data = MediaType.parse(FORM_PRODUCES);
            RequestBody bodyParams = RequestBody.create(MutilPart_Form_Data, JSON.toJSONString(params));
            MultipartBody.Builder requestBodyBuilder = new MultipartBody.Builder()
                    .setType(MultipartBody.FORM);
            //.addFormDataPart("key", "", bodyParams);
            // 添加表单文件数据
            addFormDataPart(requestBodyBuilder, params);
            Iterator<String> iterator = pathList.iterator();
            while (iterator.hasNext()) {
                String path = iterator.next();
                File file = new File(path);
                requestBodyBuilder.addFormDataPart("file", file.getName(), RequestBody.create(MutilPart_Form_Data, new File(path)));
            }
            RequestBody requestBody = requestBodyBuilder.build();
            Request request = new Request.Builder()
                    .url(url).addHeader(apiKey, apiVal)
                    .post(requestBody)
                    .build();
            Response response = OkHttpClientEnum.INSTANCE.getInstance().newCall(request).execute();
            String rs = response.body().string();
            resultVO = JSON.parseObject(rs, ResultVO.class);
            return resultVO;
        } catch (Exception e) {
            log.error(e.getMessage());
            resultVO = new ResultVO(-1, e.getMessage(), null);
            return resultVO;
        }
    }

    public static ResultVO pushOneFile(String url, String filePath, Map<String, String> params, String apiKey, String apiVal) {
        ResultVO resultVO = null;
        try {
            MediaType MutilPart_Form_Data = MediaType.parse(FORM_PRODUCES);
            RequestBody bodyParams = RequestBody.create(MutilPart_Form_Data, JSON.toJSONString(params));
            MultipartBody.Builder requestBodyBuilder = new MultipartBody.Builder()
                    .setType(MultipartBody.FORM);
            //.addFormDataPart("key", "", bodyParams);
            // 添加表单文件数据
            addFormDataPart(requestBodyBuilder, params);
            File file = new File(filePath);
            requestBodyBuilder.addFormDataPart("file", file.getName(), RequestBody.create(MutilPart_Form_Data, file));
            RequestBody requestBody = requestBodyBuilder.build();
            Request request = new Request.Builder()
                    .url(url).addHeader(apiKey, apiVal)
                    .post(requestBody)
                    .build();
            Response response = OkHttpClientEnum.INSTANCE.getInstance().newCall(request).execute();
            String rs = response.body().string();
            resultVO = JSON.parseObject(rs, ResultVO.class);
            return resultVO;
        } catch (Exception e) {
            log.error(e.getMessage());
            resultVO = new ResultVO(-1, e.getMessage(), null);
            return resultVO;
        }
    }

    private static void addFormDataPart(MultipartBody.Builder builder, Map<String, String> params) {
        if (null == params || params.size() < 1) {
            return;
        }
        Iterator<Map.Entry<String, String>> iterator = params.entrySet().iterator();
        Map.Entry<String, String> entry = null;
        while (iterator.hasNext()) {
            entry = iterator.next();
            builder.addFormDataPart(entry.getKey(), entry.getValue());
            entry = null;
        }

    }

    public static String postFace(String url, String filePath, Map<String, String> params) {
        try {
            MediaType MutilPart_Form_Data = MediaType.parse(FORM_PRODUCES);
            MultipartBody.Builder requestBodyBuilder = new MultipartBody.Builder()
                    .setType(MultipartBody.FORM);
            // 添加表单文件数据
            addFormDataPart(requestBodyBuilder, params);
            File file = new File(filePath);
            requestBodyBuilder.addFormDataPart("image_file", file.getName(), RequestBody.create(MutilPart_Form_Data, file));
            RequestBody requestBody = requestBodyBuilder.build();
            Request request = new Request.Builder()
                    .url(url)
                    .post(requestBody)
                    .build();
            Response response = OkHttpClientEnum.INSTANCE.getInstance().newCall(request).execute();
            String rs = response.body().string();
            return rs;
        } catch (Exception e) {
            log.error(e.getMessage());
            return null;
        }
    }

    public static void main(String[] args) {
    }
}