在OkHttpClient的使用中，建议将其定义为静态变量，以便在整个应用程序中共享。以下是使用OkHttpClient进行HTTP GET和POST请求的示例代码：

```java

// 温馨小提示：在使用OkHttpClient时，最好将其定义为静态变量

private static OkHttpClient okHttpClient;

static {

okHttpClient = new OkHttpClient.Builder()

.connectTimeout(10, TimeUnit.SECONDS)

.writeTimeout(10, TimeUnit.SECONDS)

.readTimeout(60, TimeUnit.SECONDS)

.build();

}

// HTTP GET请求示例

public String run(String url) throws IOException {

Request request = new Request.Builder().url(url).build();

Response response = client.newCall(request).execute();

if (response.isSuccessful()) {

return response.body().string();

} else {

throw new IOException("Unexpected code " + response);

}

}

// HTTP POST提交Json数据示例

public String postJsonData(String url, Map jsonData) throws IOException {

RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), new Gson().toJson(jsonData));

Request request = new Request.Builder()

.url(url)

.post(requestBody)

.build();

Response response = client.newCall(request).execute();

if (response.isSuccessful()) {

return response.body().string();

} else {

throw new IOException("Unexpected code " + response);

}

}

```

以下是重构后的代码：

```java

import okhttp3.MediaType;

import okhttp3.OkHttpClient;

import okhttp3.RequestBody;

import okhttp3.Request;

import okhttp3.Response;

import java.io.IOException;

public class Main {

public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");

public static void main(String[] args) {

OkHttpClient client = new OkHttpClient();

String url = "https://api.example.com/post";

String json = "{\"key\":\"value\"}";

try {

String response = post(url, json);

System.out.println(response);

} catch (IOException e) {

e.printStackTrace();

}

}

public static String post(String url, String json) throws IOException {

RequestBody body = RequestBody.create(JSON, json);

Request request = new Request.Builder()

.url(url)

.post(body)

.build();

Response response = client.newCall(request).execute();

if (response.isSuccessful()) {

return response.body().string();

} else {

throw new IOException("Unexpected code " + response);

}

}

}

```

以下是重构后的代码：

```java

OkHttpClient client = new OkHttpClient();

public String post(String url, Map formData) throws IOException {

FormBody.Builder formBodyBuilder = new FormBody.Builder();

for (Map.Entry entry : formData.entrySet()) {

formBodyBuilder.add(entry.getKey(), entry.getValue());

}

RequestBody requestBody = formBodyBuilder.build();

Request request = new Request.Builder()

.url(url)

.post(requestBody)

.build();

Response response = client.newCall(request).execute();

if (response.isSuccessful()) {

return response.body().string();

} else {

throw new IOException("Unexpected code " + response);

}

}

```

重构的思路是将表单数据从字符串转换为`Map`,并使用`FormBody.Builder`来构建请求体。这样可以更方便地处理不同的表单数据格式，并且避免了硬编码表单数据的麻烦。

以下是重构后的代码：

```java

public List getPolyvToken(HzsPolyvsList polyvsList) {

List polyvTokenEntityList = new ArrayList<>();

List polyvDetailsList = polyvsList.getHzsPolyvDetailsList();

for (HzsPolyvDetails polyvDetails : polyvDetailsList) {

StringBuilder concated = new StringBuilder().append(secretkey);

concated.append("extraParams").append(polyvDetails.getExtraParams())

.append("ts").append(polyvDetails.getTs())

.append("userId").append(secretId)

.append("videoId").append(polyvDetails.getVideoId())

.append("viewerId").append(polyvDetails.getUserId())

.append("viewerIp").append(polyvDetails.getIp())

.append("viewerName").append(polyvDetails.getUsername()).append(secretkey);

String sign = this.MD5Code(concated.toString().trim());

OkHttpClient client = new OkHttpClient();

FormBody body = new FormBody.Builder()

.add("userId", secretId)

.add("videoId", polyvDetails.getVideoId())

.add("ts", String.valueOf(polyvDetails.getTs()))

.add("viewerIp", polyvDetails.getIp())

.add("viewerName", polyvDetails.getUsername())

.add("extraParams", polyvDetails.getExtraParams())

.add("viewerId", String.valueOf(polyvDetails.getUserId()))

.add("sign", sign)

.build();

Request request = new Request.Builder().addHeader("Content-type", "application/x-www-form-urlencoded")

.url(url).post(body).build();

try {

Response response = client.newCall(request).execute();

if (response.isSuccessful()) {

String result = response.body().string();

logger.debug("****************content:" + result);

Document document = Document.parse(result);

Document document1 = (Document) document.get("data");

HzsPolyvTokenEntity polyvTokenEntity1 = new HzsPolyvTokenEntity();

polyvTokenEntity1.setToken(document1.get("token").toString());

polyvTokenEntity1.setVideoId(document1.get("videoId").toString());

polyvTokenEntityList.add(polyvTokenEntity1);

} else {

logger.debug("*********" + response.body().string());

throw new IllegalArgumentException("get polyv interface failed!");

}

} catch (IOException e) {

e.printStackTrace();

}

}

return polyvTokenEntityList;

}

```