java中HttpClient请求示例

需要的jar包：

• httpmime-4.3.6.jar
• httpcore-4.3.jar
• httpclient-4.3.6.jar
• fastjson-1.2.47.jar

package gogoal.api;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
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.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import com.alibaba.fastjson.JSONObject;

import ggframework.bottom.config.GGConfigurer;
import ggframework.bottom.log.GGLogger;


public class GoGoalAPI {

//  private static final String DOMAIN = GGConfigurer.get("api.domain");
    /**
     * 
     * 方法描述:POST请求用户API
     *
     * @param url
     * @param jsonParam
     * @return
     * 
     * @date 2018年5月28日 下午1:37:11
     */
    public static JSONObject requestByPost(String url, JSONObject jsonParam) {  
        // post请求返回结果  
        CloseableHttpClient httpClient = HttpClients.createDefault();  
        JSONObject jsonResult = null;  
        HttpPost httpPost = new HttpPost(url);  
        // 设置请求和传输超时时间  
        RequestConfig requestConfig = RequestConfig.custom()  
                .setSocketTimeout(2000).setConnectTimeout(2000).build();  
        httpPost.setConfig(requestConfig);  
        try {  
            if (null != jsonParam) {  
                // 解决中文乱码问题  
                StringEntity entity = new StringEntity(jsonParam.toString(), "utf-8");  
                entity.setContentEncoding("UTF-8");  
                entity.setContentType("application/json");  
                httpPost.setEntity(entity);  
            }  
            CloseableHttpResponse result = httpClient.execute(httpPost);  
            //请求发送成功，并得到响应  
            if (result.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {  
                try {  
                    //读取服务器返回过来的json字符串数据   
                    String str = EntityUtils.toString(result.getEntity(), "utf-8");  
                    //把json字符串转换成json对象   
                    jsonResult = JSONObject.parseObject(str);  
                } catch (Exception e) {  
                    GGLogger.error("post请求提交失败:" + url, e);  
                }  
            }  
        } catch (IOException e) {  
            GGLogger.error("post请求提交失败:" + url, e);  
        } finally {  
            httpPost.releaseConnection();  
        }  
        return jsonResult;  
   }  
   /**
    * 
    * 方法描述 GET请求用户API
    *
    * @param url
    * @return
    * 
    * @date 2018年5月28日 下午1:37:59
    */
   public static JSONObject requestByGet(String url) {  
        // get请求返回结果  
        JSONObject jsonResult = null;  
        CloseableHttpClient client = HttpClients.createDefault();  
        // 发送get请求  
        HttpGet request = new HttpGet(url);  
        // 设置请求和传输超时时间  
        RequestConfig requestConfig = RequestConfig.custom()  
                .setSocketTimeout(2000).setConnectTimeout(2000).build();  
        request.setConfig(requestConfig);  
        try {  
            CloseableHttpResponse response = client.execute(request);  
            //请求发送成功，并得到响应  
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {  
                //读取服务器返回过来的json字符串数据  
                HttpEntity entity = response.getEntity();  
                String strResult = EntityUtils.toString(entity, "utf-8");  
                //把json字符串转换成json对象  
                jsonResult = JSONObject.parseObject(strResult);  
            } else {  
                GGLogger.error("GET请求提交失败:" + url);  
            }  
        } catch (IOException e) {  
            GGLogger.error("GET请求提交失败:" + url, e);  
        } finally {  
            request.releaseConnection();  
        }  
        return jsonResult ;  
    }  
}