封裝post請求

封裝post的請求

1、通過httpclient發送post請求進行連接

2、對於post請求，包含兩個部分，url和要傳的參數

3、url我們在測試的時候是知道的，關鍵是參數如何進行傳輸。對於post請求，我們使用NameValuePair類型進行傳輸。

4、釋放連接

package test1;

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.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.testng.annotations.Test;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by daojia on 2017-6-20.
 * 模擬httpsend請求，傳入的參數有url以及附帶的參數,返回String類型
 */
public class httptest {
    public String send(String url,Map<String,String> map) throws IOException {
        String result = "";
        //創建httpclient對象
        CloseableHttpClient client = HttpClients.createDefault();
        //創建post請求對象
        HttpPost httpPost = new HttpPost(url);
        //裝填參數
        List<NameValuePair> parm = new ArrayList<NameValuePair>();
        if(map != null)
        {
            for(Map.Entry<String,String> me : map.entrySet())
            {
                parm.add(new BasicNameValuePair(me.getKey(),me.getValue()));
            }
        }

        System.out.println("請求參數"+parm.toString());


        httpPost.setEntity(new UrlEncodedFormEntity(parm,"utf-8"));

        System.out.println("請求鏈接"+httpPost.toString());

        //執行請求
        CloseableHttpResponse response = client.execute(httpPost);
        result=response.toString();
        System.out.println("請求鏈接"+result);

　　　　　response.close();


        return result;

    }