请求方式

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import com.alibaba.fastjson.JSONObject;

import sviolet.smcrypto.Sm2Key;
import sviolet.smcrypto.SmCryptoUtil;
public class Utils {
    //请求RESTFUL
    public static String sendPost(String url, String data) {
        String response = null;
        try {
            CloseableHttpClient httpclient = null;
            CloseableHttpResponse httpresponse = null;
            try {
                httpclient = HttpClients.createDefault();
                HttpPost httppost = new HttpPost(url);
                StringEntity stringentity = new StringEntity(data,
                        ContentType.create("application/json", "UTF-8"));
                httppost.setEntity(stringentity);
                httpresponse = httpclient.execute(httppost);
                response = EntityUtils.toString(httpresponse.getEntity());

            } finally {
                if (httpclient != null) {
                    httpclient.close();
                }
                if (httpresponse != null) {
                    httpresponse.close();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return response;
    }
    //http url post请求
    public static String sendPost2(String url, Map<String, Object> paramsMap) {
        String response = null;
        try {
            CloseableHttpClient httpclient = null;
            CloseableHttpResponse httpresponse = null;
            try {
                httpclient = HttpClients.createDefault();
                HttpPost httppost = new HttpPost(url);
//              StringEntity stringentity = new StringEntity(data,
//                      ContentType.create("application/json", "UTF-8"));
                
                //装配post请求参数
                List<NameValuePair> list = new ArrayList<NameValuePair>();
                for (String key : paramsMap.keySet()) {
                    list.add(new BasicNameValuePair(key, String.valueOf(paramsMap.get(key))));
                }
                //将参数进行编码为合适的格式,如将键值对编码为param1=value1&param2=value2
                UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(list, "utf-8");
                httppost.setEntity(urlEncodedFormEntity);
                httpresponse = httpclient.execute(httppost);
                response = EntityUtils.toString(httpresponse.getEntity());

            } finally {
                if (httpclient != null) {
                    httpclient.close();
                }
                if (httpresponse != null) {
                    httpresponse.close();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return response;
    }
   public static String doPost(String url, Map<String, Object> paramsMap) {
        CloseableHttpClient closeableHttpClient = HttpClients.createDefault();
        //配置连接超时时间
        RequestConfig requestConfig = RequestConfig.custom()
                .setConnectTimeout(5000)
                .setConnectionRequestTimeout(5000)
                .setSocketTimeout(5000)
                .setRedirectsEnabled(true)
                .build();
        HttpPost httpPost = new HttpPost(url);
        //设置超时时间
        httpPost.setConfig(requestConfig);

        //装配post请求参数
        List<NameValuePair> list = new ArrayList<NameValuePair>();
        for (String key : paramsMap.keySet()) {
            list.add(new BasicNameValuePair(key, String.valueOf(paramsMap.get(key))));
        }

        try {
            //将参数进行编码为合适的格式,如将键值对编码为param1=value1&param2=value2
            UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(list, "utf-8");
            httpPost.setEntity(urlEncodedFormEntity);

            //执行 post请求
            CloseableHttpResponse closeableHttpResponse = closeableHttpClient.execute(httpPost);
            String strRequest = "";
            if (null != closeableHttpResponse && !"".equals(closeableHttpResponse)) {
                System.out.println(closeableHttpResponse.getStatusLine().getStatusCode());
                if (closeableHttpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                    HttpEntity httpEntity = closeableHttpResponse.getEntity();
                    strRequest = EntityUtils.toString(httpEntity);
                } else {
                    strRequest = "Error Response" + closeableHttpResponse.getStatusLine().getStatusCode();
                }
            }
            return strRequest;

        } catch (ClientProtocolException e) {
            e.printStackTrace();
            return "协议异常";
        } catch (ParseException e) {
            e.printStackTrace();
            return "解析异常";
        } catch (IOException e) {
            e.printStackTrace();
            return "传输异常";
        } finally {
            try {
                if (closeableHttpClient != null) {
                    closeableHttpClient.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }


}