HttpClient用Post和Get带参数提交帮助类

转载自https://blog.csdn.net/nevergiveuplzl/article/details/52304266

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<String, Object> params) {
     if(!StringUtils.hasText(url)){
     return "";
     }
    try {
        if (params != null && !params.isEmpty()) {
            List<NameValuePair> pairs = new ArrayList<NameValuePair>(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<String, Object> params) {
     if(!StringUtils.hasText(url)){
         return "";
         }
    try {
        List<NameValuePair> pairs = null;
        if (params != null && !params.isEmpty()) {
            pairs = new ArrayList<NameValuePair>(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;
}