package com.learn.http;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
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.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
public class  {
	public static void main(String[] args) {
		
		new HttpSend().post("http://www.baidu.com");
		new HttpSend().get("http://www.baidu.com");
	}
	/**
	 * 发送 post请求访问本地应用并根据传递参数不同返回不同结果
	 */
	public void post(String url) {
		// 创建默认的httpClient实例.
		CloseableHttpClient httpclient = HttpClients.createDefault();
		// 创建httppost
		HttpPost httppost = new HttpPost(url);
		
		// 创建参数队列
		List<NameValuePair> formparams = new ArrayList<NameValuePair>();
		// 添加参数
		// formparams.add(new BasicNameValuePair("gg", "1"));
		UrlEncodedFormEntity uefEntity;
		try {
			//传入空参数，创建实体对象
			uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8");
			//设置post对象的实体对象
			httppost.setEntity(uefEntity);
			System.out.println("executing post request " + httppost.getURI());
			//执行post请求
			CloseableHttpResponse response = httpclient.execute(httppost);
			try {
				//获取请求结果对象
				HttpEntity entity = response.getEntity();
				if (entity != null) {
					System.out.println("--------------------------------------");
					System.out.println("Response content: " + EntityUtils.toString(entity));
					System.out.println("--------------------------------------");
				}
			} finally {
				response.close();
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e1) {
			e1.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			// 关闭连接,释放资源
			try {
				httpclient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	/**
	 * 发送 get请求
	 */
	public void get(String url) {
		// 创建默认的httpClient实例.
		CloseableHttpClient httpclient = HttpClients.createDefault();
		
		try {
			// 封装请求参数
			List<NameValuePair> params = new ArrayList<>();
			params.add(new BasicNameValuePair("cityEname", "henan"));
			//转换为键值对
			String str = EntityUtils.toString(new UrlEncodedFormEntity(params, "UTF-8"));
			System.out.println(str);
			//创建带参数get请求（示例）
			HttpGet httpGet = new HttpGet(url+"?"+str);
			// 创建不带参数get请求
			HttpGet httpget = new HttpGet(url);
			System.out.println("executing get request " + httpget.getURI());
			// 执行get请求.
			CloseableHttpResponse response = httpclient.execute(httpget);
			try {
				// 获取响应实体
				HttpEntity entity = response.getEntity();
				System.out.println("--------------------------------------");
				// 打印响应状态
				System.out.println(response.getStatusLine());
				if (entity != null) {
					// 打印响应内容长度
					System.out.println("Response content length: " + entity.getContentLength());
					// 打印响应内容
					System.out.println("Response content: " + EntityUtils.toString(entity));
				}
				System.out.println("------------------------------------");
			} finally {
				response.close();
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			// 关闭连接,释放资源
			try {
				httpclient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}