HttpClient发送请求公共方法

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import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.inspur.inserver.util.exception.MyException;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import static com.inspur.inserver.util.constant.SystemConstant.COMMON_CHARSET;public class HttpUtils {

    private HttpUtils(){}

    /**
     * get
     *
     *
     * @param headers
* @param querys
* @return
* @throws Exception
     */
public static HttpResponse doGet(String url,
                                     Map headers,
                                     Map querys)
            throws IOException {
        HttpClient httpClient = sslClient();
        HttpGet request = new HttpGet(buildUrl(url, querys));
        for (Map.Entry e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }
        return httpClient.execute(request);
    }

    /**
     * post form
     *
     *
     * @param headers
* @param querys
* @param bodys
* @return
* @throws Exception
     */
public static HttpResponse doPost(String url,
                                      Map headers,
                                      Map querys,
                                      Map bodys)
            throws IOException {
        HttpClient httpClient = sslClient();
        HttpPost request = new HttpPost(buildUrl(url, querys));
        for (Map.Entry e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }
        if (bodys != null) {
            List nameValuePairList = new ArrayList();

            for (String key : bodys.keySet()) {
                nameValuePairList.add(new BasicNameValuePair(key, bodys.get(key)));
            }
            UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nameValuePairList, COMMON_CHARSET.getValue());
            formEntity.setContentType("application/x-www-form-urlencoded; charset=UTF-8");
            request.setEntity(formEntity);
        }
        return httpClient.execute(request);
    }

    /**
     * Post String
     *
     *
     * @param headers
* @param querys
* @param body
* @return
* @throws Exception
     */
public static HttpResponse doPost(String url,
                                      Map headers,
                                      Map querys,
                                      String body) throws IOException {
        HttpClient httpClient = sslClient();
        HttpPost request = new HttpPost(buildUrl(url, querys));
        for (Map.Entry e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }
        if (StringUtils.isNotBlank(body)) {
            request.setEntity(new StringEntity(body, COMMON_CHARSET.getValue()));
        }
        return httpClient.execute(request);
    }

    /**
     * Post stream
     *
     *
     * @param headers
* @param querys
* @param body
* @return
* @throws Exception
     */
public static HttpResponse doPost(String url,
                                      Map headers,
                                      Map querys,
                                      byte[] body)
            throws IOException {
        HttpClient httpClient = sslClient();
        HttpPost request = new HttpPost(buildUrl(url, querys));
        for (Map.Entry e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }
        if (body != null) {
            request.setEntity(new ByteArrayEntity(body));
        }
        return httpClient.execute(request);
    }

    /**
     * Put String
     *
     *
     * @param headers
* @param querys
* @param body
* @return
* @throws Exception
     */
public static HttpResponse doPut(String url,
                                     Map headers,
                                     Map querys,
                                     String body)
            throws IOException {
        HttpClient httpClient = sslClient();
        HttpPut request = new HttpPut(buildUrl(url, querys));
        for (Map.Entry e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }
        if (StringUtils.isNotBlank(body)) {
            request.setEntity(new StringEntity(body, "utf-8"));
        }
        return httpClient.execute(request);
    }

    /**
     * Put stream
     *
     *
     * @param headers
* @param querys
* @param body
* @return
* @throws Exception
     */
public static HttpResponse doPut(String url,
                                     Map headers,
                                     Map querys,
                                     byte[] body)
            throws IOException {
        HttpClient httpClient = sslClient();
        HttpPut request = new HttpPut(buildUrl(url, querys));
        for (Map.Entry e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }
        if (body != null) {
            request.setEntity(new ByteArrayEntity(body));
        }
        return httpClient.execute(request);
    }

    /**
     * Delete
     *
     *
     * @param headers
* @param querys
* @return
* @throws Exception
     */
public static HttpResponse doDelete(String url,
                                        Map headers,
                                        Map querys)
            throws IOException {
        HttpClient httpClient = sslClient();
        HttpDelete request = new HttpDelete(buildUrl(url, querys));
        for (Map.Entry e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }
        return httpClient.execute(request);
    }

    /**
     * 构建请求的 url
     *
     */
private static String buildUrl(String url, Map querys) throws UnsupportedEncodingException {
        StringBuilder sbUrl = new StringBuilder();
        if (StringUtils.isBlank(url)) {
            throw new MyException("URL is null !");
        }
        sbUrl.append(url);
        if (null != querys) {
            StringBuilder sbQuery = new StringBuilder();
            for (Map.Entry query : querys.entrySet()) {
                if (0 < sbQuery.length()) {
                    sbQuery.append("&");
                }
                if (StringUtils.isBlank(query.getKey()) && !StringUtils.isBlank(query.getValue())) {
                    sbQuery.append(query.getValue());
                }
                if (!StringUtils.isBlank(query.getKey())) {
                    sbQuery.append(query.getKey());
                    if (!StringUtils.isBlank(query.getValue())) {
                        sbQuery.append("=");
                        sbQuery.append(URLEncoder.encode(query.getValue(), "utf-8"));
                    }
                }
            }
            if (0 < sbQuery.length()) {
                sbUrl.append("?").append(sbQuery);
            }
        }
        return sbUrl.toString();
    }

    /**
     * 在调用SSL之前需要重写验证方法，取消检测SSL
     * 创建ConnectionManager，添加Connection配置信息
*
     * @return HttpClient 支持https
     */
private static HttpClient sslClient() {
        return HttpsClientUtil.getHttpsClient();
    }

    /**
     * 将结果转换成JSONObject
     *
     * @param httpResponse
* @return
* @throws IOException
     */
public static JSONObject getJson(HttpResponse httpResponse) throws IOException {
        HttpEntity entity = httpResponse.getEntity();
        String resp = EntityUtils.toString(entity, "UTF-8");
        EntityUtils.consume(entity);
        return JSON.parseObject(resp);
    }
}