OkHttp工具类

import java.io.IOException;
import java.util.Map;

import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

/**
 * okhttp 网络请求
 */
public class OkHttp {

    private OkHttpClient client = new OkHttpClient();

    /**
     * Get 请求
     *
     * @return String
     */
    String get(String url) throws IOException {
        Request request = new Request.Builder()
                .url(url)
                .build();
        try (Response response = client.newCall(request).execute()) {
            return response.body().string();
        }
    }

    /**
     * Post 请求
     *
     * @return String
     */
    String post(String url, Map<String, String> param) throws IOException {
        FormBody.Builder body = new FormBody.Builder();
        for (String key : param.keySet()) {
            body.add(key, param.get(key)).build();
        }
        RequestBody requestBody = body.build();
        Request request = new Request.Builder()
                .url(url)
                .post(requestBody)
                .build();
        try (Response response = client.newCall(request).execute()) {
            return response.body().string();
        }
    }
}