自定义Http请求(get、post)

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我是靠谱客的博主柔弱画板，最近开发中收集的这篇文章主要介绍自定义Http请求(get、post)，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

import com.alibaba.fastjson.JSON;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
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.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
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;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class HttpClientUtil {

    private static final CloseableHttpClient httpClient = HttpClients.createDefault();

    private static final RequestConfig requestConfig = RequestConfig.custom()
            .setConnectTimeout(2000)
            .setSocketTimeout(10000).build();

    public static String doGet(String url) {
        return doGet(url, null);
    }

    public static String doPost(String url) {
        return doPost(url, null);
    }

    public static String doGet(String url, Map<String, String> param) {
        //创建HttpClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        String resultString = "";
        CloseableHttpResponse response = null;

        try {
            //创建URI
            URIBuilder builder = new URIBuilder(url);

            //设置参数
            if (param != null) {
                for (String key : param.keySet()) {
                    builder.addParameter(key, param.get(key));
                }
            }

            URI uri = builder.build();

            //创建Http请求
            HttpGet httpGet = new HttpGet(uri);
            //执行请求
            response = httpClient.execute(httpGet);

            //如果成功，返回响应字符串
            if (response.getStatusLine().getStatusCode() == 200) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }

    public static String doPost(String url, Map<String, String> param) {
        //创建HttpClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        String resultString = "";
        CloseableHttpResponse response = null;

        try {
            //创建HttpPost请求方式
            HttpPost httpPost = new HttpPost(url);

            //创建参数列表
            if (param != null) {
                List<NameValuePair> paramList = new ArrayList<>();
                for (String key : param.keySet()) {
                    paramList.add(new BasicNameValuePair(key, param.get(key)));
                }
                //模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
                httpPost.setEntity(entity);
            }

            //执行http请求
            response = httpClient.execute(httpPost);

            if (response.getStatusLine().getStatusCode() == 200) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }

    public static String doPostJosn(String url, String json) {
        //创建HttpClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        String resultString = "";
        CloseableHttpResponse response = null;

        try {
            //创建post请求
            HttpPost httpPost = new HttpPost();

            //创建请求内容
            StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
            httpPost.setEntity(entity);

            //执行请求
            response = httpClient.execute(httpPost);
            if (response.getStatusLine().getStatusCode() == 200) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
                httpClient.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        return resultString;
    }

    public static JSONObject getJson(String res){
        JSONObject jsonObj = new JSONObject(res);
        return jsonObj;
    }

    /**
     * POST请求   携带Json格式的参数
     *
     * @param url
     * @param param
     * @return
     * @throws IOException
     */
    public static String postJson(String url, Object param) {
        HttpPost httpPost = new HttpPost(url);
        httpPost.setHeader("Content-Type", "application/json;charset=UTF-8");

        httpPost.setConfig(requestConfig);
        String parameter = JSON.toJSONString(param);
        StringEntity se = null;
        try {
            se = new StringEntity(parameter);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        se.setContentType("text/json");
        httpPost.setEntity(se);

        CloseableHttpResponse response = null;
        String result = null;
        try {
            response = httpClient.execute(httpPost);

            HttpEntity httpEntity = response.getEntity();
            result = EntityUtils.toString(httpEntity, "UTF-8");
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

}

使用案例

//1.get请求-不带参
String url = loginOut+"/"+ticket;
String res = HttpClientUtil.doGet(url);
JSONObject json = HttpClientUtil.getJson(res);

//2.get请求-带参
Map<String,String> param = new HashMap<>();
param.put("token",token);
String res = HttpClientUtil.doGet(getUserInfo,param);
JSONObject jsonRes = HttpClientUtil.getJson(res);

//3.post请求（非json格式）
Map<String,String> param = new HashMap<>();
param.put("username",phone);
param.put("password",passwordOld);
String res = HttpClientUtil.doPost(loginTest, param);
JSONObject json = HttpClientUtil.getJson(res);

//4.post请求（json格式的参数）
com.alibaba.fastjson.JSONObject object = new com.alibaba.fastjson.JSONObject();
object.put("mobile",mobile);
object.put("type",18);
object.put("param",new Object());
object.put("signName","");
String res = HttpClientUtil.postJson(messageSend, object);
log.info("发送短信res:"+res);

JSONObject json = HttpClientUtil.getJson(res);