httpclient之post 方法（参数为string）

Posted 2020-11-07 chenzx0918

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 2018/5/18.
 */
public class HttpclientPostForString {
    public static void main(String[] args) {
        CloseableHttpClient closeableHttpClient = HttpClients.createDefault();

        //配置超时时间
        RequestConfig requestConfig = RequestConfig.custom()
                .setConnectTimeout(5000)
                .setConnectionRequestTimeout(5000)
                .setSocketTimeout(5000)
                .setRedirectsEnabled(true)
                .build();
        HttpPost httpPost = new HttpPost("https://passport.cnblogs.com/user/signin?ReturnUrl=https%3A%2F%2Fwww.cnblogs.com%2F");

        //设置超时时间
        httpPost.setConfig(requestConfig);

        //装配post请求参数

        List<NameValuePair> list = new ArrayList<NameValuePair>();
        list.add(new BasicNameValuePair("name", "jiangcui"));
        list.add(new BasicNameValuePair("password", "chenzx0918"));

        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方法
            CloseableHttpResponse closeableHttpResponse = closeableHttpClient.execute(httpPost);
            String strResult = "";

            if (null != closeableHttpResponse && !"".equals(closeableHttpResponse)) {
                System.out.println(closeableHttpResponse.getStatusLine().getStatusCode());
                if (closeableHttpResponse.getStatusLine().getStatusCode() == 200) {
                    HttpEntity httpEntity = closeableHttpResponse.getEntity();
                    strResult = EntityUtils.toString(httpEntity);
                    System.out.println(strResult);
                    //将字符串转换为 JSON格式
                    JSONObject jsonObject = new JSONObject(strResult);
                    //获取json串中的数据
                    //String str = jsonObject.get("name").toString;

                } else {
                    strResult = "Error Response:" + closeableHttpResponse.getStatusLine().getStatusCode();
                    System.out.println(strResult);
                }
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (closeableHttpClient != null) {
                    closeableHttpClient.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}