HttpClientUtil

;

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.NameValuePair;
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.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class HttpClientUtil {

	public static String doGet(String url, Map<String, String> param,String charSet) {

		CloseableHttpClient httpclient = HttpClients.createDefault();
		String resultString = "";
		CloseableHttpResponse response = null;
		try {
			// 创建uri
			URIBuilder builder = new URIBuilder(url);
			if (param != null) {
				for (String key : param.keySet()) {
					builder.addParameter(key, param.get(key));
				}
			}
			URI uri = builder.build();
			HttpGet httpGet = new HttpGet(uri);
			
			response = httpclient.execute(httpGet);
			if (response.getStatusLine().getStatusCode() == 200) {
				resultString = EntityUtils.toString(response.getEntity(), charSet);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (response != null)
					response.close();
				httpclient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return resultString;
	}

	public static String doGet(String url,String charSet) {
		return doGet(url, null);
	}

	public static String doPost(String url, Map<String, String> param,String charSet) {
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		String resultString = "";
		try {
			// 创建Http Post请求
			HttpPost httpPost = new HttpPost(url);
			// 创建参数列表
			if (param != null) {
				List<NameValuePair> paramList = new ArrayList<>();
				for (String key : param.keySet()) {
					paramList.add(new BasicNameValuePair(key, param.get(key)));
				}
				// 模拟表单
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList, "UTF-8");
				httpPost.setEntity(entity);
			}
			// 执行http请求
			response = httpClient.execute(httpPost);
			if (response.getStatusLine().getStatusCode() == 200) {
				resultString = EntityUtils.toString(response.getEntity(), charSet);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (response != null)
					response.close();
				httpClient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}

		return resultString;
	}
	
	public static String doPostStr(String url, String reqStr,String charSet) {
		// 创建Httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		String resultString = "";
		try {
			HttpPost httpPost = new HttpPost(url);
			if (reqStr != null) {
				StringEntity entity = new StringEntity(reqStr);
				httpPost.setEntity(entity);
			}
			response = httpClient.execute(httpPost);
			if (response.getStatusLine().getStatusCode() == 200) {
				resultString = EntityUtils.toString(response.getEntity(), charSet);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (response != null)
					response.close();
				httpClient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return resultString;
	}

	public static String doPost(String url) {
		return doPost(url, null);
	}
}