HttpClient用Post和Get带参数提交帮助类

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
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.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
/**
* 基于 httpclient 的 http工具类
*
* @author mcSui
*
*/
public class HttpTookit {

private static final CloseableHttpClient httpClient;
public static final String CHARSET = "UTF-8";
static {
    RequestConfig config = RequestConfig.custom().setConnectTimeout(60000).setSocketTimeout(15000).build();
    httpClient = HttpClientBuilder.create().setDefaultRequestConfig(config).build();
}

/**
 * HTTP Get 获取内容
 * @param url请求的url地址 ?之前的地址
 * @param params请求的参数
 * @param charset编码格式
 * @return 页面内容
 */
public static String sendGet(String url, Map params) {
     if(!StringUtils.hasText(url)){
     return "";
     }
    try {
        if (params != null && !params.isEmpty()) {
            List pairs = new ArrayList(params.size());
            for (String key : params.keySet()) {
                    pairs.add(new BasicNameValuePair(key, params.get(key).toString()));
            }
            url += "?" + EntityUtils.toString(new UrlEncodedFormEntity(pairs, CHARSET));
        }
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response = httpClient.execute(httpGet);
        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode != 200) {
            httpGet.abort();
            throw new RuntimeException("HttpClient,error status code :" + statusCode);
        }
        HttpEntity entity = response.getEntity();
        String result = null;
        if (entity != null) {
            result = EntityUtils.toString(entity, "utf-8");
        }
        EntityUtils.consume(entity);
        response.close();
        return result;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

/**
 * HTTP Post 获取内容
 * @param url请求的url地址 ?之前的地址
 * @param params请求的参数
 * @param charset编码格式
 * @return 页面内容
 */
public static String sendPost(String url, Map params) {
     if(!StringUtils.hasText(url)){
         return "";
         }
    try {
        List pairs = null;
        if (params != null && !params.isEmpty()) {
            pairs = new ArrayList(params.size());
            for (String key : params.keySet()) {
                pairs.add(new BasicNameValuePair(key, params.get(key).toString()));
        }
        }
        HttpPost httpPost = new HttpPost(url);
        if (pairs != null && pairs.size() > 0) {
            httpPost.setEntity(new UrlEncodedFormEntity(pairs, CHARSET));
        }
        CloseableHttpResponse response = httpClient.execute(httpPost);
        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode != 200) {
            httpPost.abort();
            throw new RuntimeException("HttpClient,error status code :" + statusCode);
        }
        HttpEntity entity = response.getEntity();
        String result = null;
        if (entity != null) {
            result = EntityUtils.toString(entity, "utf-8");
        }
        EntityUtils.consume(entity);
        response.close();
        return result;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

}

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