httpclient之post 方法（参数为Map类型）

package httpclient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.http.*;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
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;

import org.json.JSONObject;

/**
 * Created by jiangcui on 2018/5/21.
 */
public class HttpClientPostForMap {
 ???public static void main(String[] args) {

 ???????Map<String, Object> map = new HashMap<String, Object>();
 ???????map.put("username", "jiangcui");
 ???????map.put("password", "chenzx0918");

 ???????String url = "https://passport.cnblogs.com/user/signin?ReturnUrl=https%3A%2F%2Fwww.cnblogs.com%2F";
 ???????String result = HttpClientPostForMap.doPost(url, map);

 ???????System.out.println(result);


 ???}

 ???// ?静态方法，类名可直接调用
 ???public static String doPost(String url, Map<String, Object> paramsMap) {
 ???????CloseableHttpClient closeableHttpClient = HttpClients.createDefault();
 ???????//配置连接超时时间
 ???????RequestConfig requestConfig = RequestConfig.custom()
 ???????????????.setConnectTimeout(5000)
 ???????????????.setConnectionRequestTimeout(5000)
 ???????????????.setSocketTimeout(5000)
 ???????????????.setRedirectsEnabled(true)
 ???????????????.build();
 ???????HttpPost httpPost = new HttpPost(url);
 ???????//设置超时时间
 ???????httpPost.setConfig(requestConfig);

 ???????//装配post请求参数
 ???????List<NameValuePair> list = new ArrayList<NameValuePair>();
 ???????for (String key : paramsMap.keySet()) {
 ???????????list.add(new BasicNameValuePair(key, String.valueOf(paramsMap.get(key))));
 ???????}

 ???????try {
 ???????????//将参数进行编码为合适的格式,如将键值对编码为param1=value1&param2=value2
 ???????????UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(list, "utf-8");
 ???????????httpPost.setEntity(urlEncodedFormEntity);

 ???????????//执行 post请求
 ???????????CloseableHttpResponse closeableHttpResponse = closeableHttpClient.execute(httpPost);
 ???????????String strRequest = "";
 ???????????if (null != closeableHttpResponse && !"".equals(closeableHttpResponse)) {
 ???????????????System.out.println(closeableHttpResponse.getStatusLine().getStatusCode());
 ???????????????if (closeableHttpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
 ???????????????????HttpEntity httpEntity = closeableHttpResponse.getEntity();
 ???????????????????strRequest = EntityUtils.toString(httpEntity);
 ???????????????} else {
 ???????????????????strRequest = "Error Response" + closeableHttpResponse.getStatusLine().getStatusCode();
 ???????????????}
 ???????????}
 ???????????return strRequest;

 ???????} catch (ClientProtocolException e) {
 ???????????e.printStackTrace();
 ???????????return "协议异常";
 ???????} catch (ParseException e) {
 ???????????e.printStackTrace();
 ???????????return "解析异常";
 ???????} catch (IOException e) {
 ???????????e.printStackTrace();
 ???????????return "传输异常";
 ???????} finally {
 ???????????try {
 ???????????????if (closeableHttpClient != null) {
 ???????????????????closeableHttpClient.close();
 ???????????????}
 ???????????} catch (IOException e) {
 ???????????????e.printStackTrace();
 ???????????}

 ???????}
 ???}

}

httpclient之post 方法（参数为Map类型）

原文地址：https://www.cnblogs.com/jshtest/p/9070699.html