package com.ljsd.util;

import org.apache.http.HttpEntity;
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.apache.http.util.EntityUtils;

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

public class HttpUtils {

    public static String doPost(String url, Map<String,String> parms) throws IOException {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        List<NameValuePair> nvps =getFromMap(parms);
        httpPost.setEntity(new UrlEncodedFormEntity(nvps));
        CloseableHttpResponse response2 = httpclient.execute(httpPost);

        try {
            HttpEntity entity = response2.getEntity();
           return  EntityUtils.toString(entity);
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        } finally {
            response2.close();
        }
    }

    public static List<NameValuePair> getFromMap(Map<String,String> parms){
        List<NameValuePair> nvps = new ArrayList<NameValuePair>(parms.size());
        for(Map.Entry<String,String> item : parms.entrySet()){
            nvps.add(new BasicNameValuePair(item.getKey(), item.getValue()));
        }
        return nvps;
    }
}