httpclient 调用接口工具抽取

import java.util.Map;
import java.util.Map.Entry;

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.util.List;
import java.util.Map;
import java.util.Map.Entry;


import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;


import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;


public class HttpClientMyUtil {
	
	/**
	 * 发送有参数的get的请求
	 * @param url 
	 * @param params 请求参数
	 * @return
	 */
	public static String get(String url,Map<String , String > params){
		CloseableHttpClient httpClient = HttpClients.createDefault();
		try {
			URIBuilder builder = new URIBuilder(url);
			if(params !=null && params.size()>0){
				for(Entry<String , String > param : params.entrySet()){
					builder.addParameter(param.getKey(), param.getValue());
				}
			}
			HttpGet httpGet = new HttpGet(builder.build());
			
			CloseableHttpResponse response = httpClient.execute(httpGet);
			
			if(response.getStatusLine().getStatusCode() == 200){
				HttpEntity entity = response.getEntity();
				return EntityUtils.toString(entity, "utf-8");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	/**
	 *无参数的get的请求
	 * @param url
	 * @return
	 */
	public static String get(String url){
		
		return get(url,null);
	}
	
	/**
	 * 调用此方法及有可能使用的此段代码
	 * String json = "";//httpclient 调用接口返回的json数据
		Gson gson = new Gson();
		//通过Gson将json数据封装到list的集合里（集合里装的是Goods实体类）
		List<Goods> goods = gson.fromJson(json, new TypeToken<List<Goods>>(){}.getType());
	 */
}