Java發送Post請求,參數JSON,接收JSON

/**
     * 發送post請求
     * @param url  路徑
     * @param jsonObject  參數(json類型)
     * @param encoding 編碼格式
     * @return
     * @throws ParseException
     * @throws IOException
     */
    public static String send(String url, JSONObject jsonObject,String encoding) throws ParseException, IOException{
        String body = "";
 
        //創建httpclient對象
        CloseableHttpClient client = HttpClients.createDefault();
        //創建post方式請求對象
        HttpPost httpPost = new HttpPost(url);
 
        //裝填參數
        StringEntity s = new StringEntity(jsonObject.toString(), "utf-8");
        s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
                "application/json"));
        //設置參數到請求對象中
        httpPost.setEntity(s);
        System.out.println("請求地址："+url);
//        System.out.println("請求參數："+nvps.toString());
 
        //設置header信息
        //指定報文頭【Content-type】、【User-Agent】
//        httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
        httpPost.setHeader("Content-type", "application/json");
        httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
 
        //執行請求操作，並拿到結果（同步阻塞）
        CloseableHttpResponse response = client.execute(httpPost);
        //獲取結果實體
        HttpEntity entity = response.getEntity();
        if (entity != null) {
            //按指定編碼轉換結果實體為String類型
            body = EntityUtils.toString(entity, encoding);
        }
        EntityUtils.consume(entity);
        //釋放鏈接
        response.close();
        return body;
    }

　　下面代碼自己寫。

 

2019/11/18，看到代碼挺多人看的，再給大家提供一個Http工具類，數據提交包括 Raw，Json等

 

package com.xiaojiang.checkin.utils;

import com.alibaba.fastjson.JSONObject;
import com.xiaojiang.checkin.entity.HttpClientResult;
import org.apache.http.HttpStatus;
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.*;
import org.apache.http.client.utils.URIBuilder;
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 java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.*;

/**
 * Description: httpClient工具類
 *
 * @author JourWon
 * @date Created on 2018年4月19日
 */
public class HttpClientUtils {

    // 編碼格式。發送編碼格式統一用UTF-8
    private static final String ENCODING = "UTF-8";

    // 設置連接超時時間，單位毫秒。
    private static final int CONNECT_TIMEOUT = 6000;

    // 請求獲取數據的超時時間(即響應時間)，單位毫秒。
    private static final int SOCKET_TIMEOUT = 6000;

    /**
     * 發送get請求；不帶請求頭和請求參數
     *
     * @param url 請求地址
     * @return
     * @throws Exception
     */
    public static HttpClientResult doGet(String url) throws Exception {
        return doGet(url, null, null);
    }

    /**
     * 發送get請求；帶請求參數
     *
     * @param url 請求地址
     * @param params 請求參數集合
     * @return
     * @throws Exception
     */
    public static HttpClientResult doGet(String url, Map<String, String> params) throws Exception {
        return doGet(url, null, params);
    }

    /**
     * 發送get請求；帶請求頭和請求參數
     *
     * @param url 請求地址
     * @param headers 請求頭集合
     * @param params 請求參數集合
     * @return
     * @throws Exception
     */
    public static HttpClientResult doGet(String url, Map<String, String> headers, Map<String, String> params) throws Exception {
        // 創建httpClient對象
        CloseableHttpClient httpClient = HttpClients.createDefault();

        // 創建訪問的地址
        URIBuilder uriBuilder = new URIBuilder(url);
        if (params != null) {
            Set<Map.Entry<String, String>> entrySet = params.entrySet();
            for (Map.Entry<String, String> entry : entrySet) {
                uriBuilder.setParameter(entry.getKey(), entry.getValue());
            }
        }

        // 創建http對象
        HttpGet httpGet = new HttpGet(uriBuilder.build());
        /**
         * setConnectTimeout：設置連接超時時間，單位毫秒。
         * setConnectionRequestTimeout：設置從connect Manager(連接池)獲取Connection
         * 超時時間，單位毫秒。這個屬性是新加的屬性，因為目前版本是可以共享連接池的。
         * setSocketTimeout：請求獲取數據的超時時間(即響應時間)，單位毫秒。 如果訪問一個接口，多少時間內無法返回數據，就直接放棄此次調用。
         */
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
        httpGet.setConfig(requestConfig);

        // 設置請求頭
        packageHeader(headers, httpGet);

        // 創建httpResponse對象
        CloseableHttpResponse httpResponse = null;

        try {
            // 執行請求並獲得響應結果
            return getHttpClientResult(httpResponse, httpClient, httpGet);
        } finally {
            // 釋放資源
            release(httpResponse, httpClient);
        }
    }

    /**
     * 發送post請求；不帶請求頭和請求參數
     *
     * @param url 請求地址
     * @return
     * @throws Exception
     */
    public static HttpClientResult doPost(String url) throws Exception {
        return doPost(url, null, null);
    }

    /**
     * 發送post請求；帶請求參數
     *
     * @param url 請求地址
     * @param params 參數集合
     * @return
     * @throws Exception
     */
    public static HttpClientResult doPost(String url, Map<String, String> params) throws Exception {
        return doPost(url, null, params);
    }

    /**
     * 發送post請求；帶請求頭和請求參數
     *可發送Formdata數據，請把請求頭設置一下，不然獲取不到數據。
     * @param url 請求地址
     * @param headers 請求頭集合
     * @param params 請求參數集合
     * @return
     * @throws Exception
     */
    public static HttpClientResult doPost(String url, Map<String, String> headers, Map<String, String> params) throws Exception {
        // 創建httpClient對象
        CloseableHttpClient httpClient = HttpClients.createDefault();

        // 創建http對象
        HttpPost httpPost = new HttpPost(url);
        /**
         * setConnectTimeout：設置連接超時時間，單位毫秒。
         * setConnectionRequestTimeout：設置從connect Manager(連接池)獲取Connection
         * 超時時間，單位毫秒。這個屬性是新加的屬性，因為目前版本是可以共享連接池的。
         * setSocketTimeout：請求獲取數據的超時時間(即響應時間)，單位毫秒。 如果訪問一個接口，多少時間內無法返回數據，就直接放棄此次調用。
         */
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
        httpPost.setConfig(requestConfig);
        // 設置請求頭
		/*httpPost.setHeader("Cookie", "");
		httpPost.setHeader("Connection", "keep-alive");
		httpPost.setHeader("Accept", "application/json");
		httpPost.setHeader("Accept-Language", "zh-CN,zh;q=0.9");
		httpPost.setHeader("Accept-Encoding", "gzip, deflate, br");
		httpPost.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36");*/
        packageHeader(headers, httpPost);

        // 封裝請求參數
        packageParam(params, httpPost);

        // 創建httpResponse對象
        CloseableHttpResponse httpResponse = null;

        try {
            // 執行請求並獲得響應結果
            return getHttpClientResult(httpResponse, httpClient, httpPost);
        } finally {
            // 釋放資源
            release(httpResponse, httpClient);
        }
    }

    /***
     * 發送post請求封裝formdata
     *
     */

//    public static HttpClientResult doPost(String url, Map<String, String> headers, Map<String, String> params){
//
//    }

    /**
     * 發送POST請求帶Raw參數
     * */
    public static HttpClientResult doPost(String url, Map<String, String> headers, Map<String, String> params,String raw) throws Exception {
        // 創建httpClient對象
        CloseableHttpClient httpClient = HttpClients.createDefault();

        // 創建http對象
        HttpPost httpPost = new HttpPost(url);
        //封裝raw 參數
        packageRaw(raw,httpPost);
        /**
         * setConnectTimeout：設置連接超時時間，單位毫秒。
         * setConnectionRequestTimeout：設置從connect Manager(連接池)獲取Connection
         * 超時時間，單位毫秒。這個屬性是新加的屬性，因為目前版本是可以共享連接池的。
         * setSocketTimeout：請求獲取數據的超時時間(即響應時間)，單位毫秒。 如果訪問一個接口，多少時間內無法返回數據，就直接放棄此次調用。
         */
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
        httpPost.setConfig(requestConfig);
        // 設置請求頭
		/*httpPost.setHeader("Cookie", "");
		httpPost.setHeader("Connection", "keep-alive");
		httpPost.setHeader("Accept", "application/json");
		httpPost.setHeader("Accept-Language", "zh-CN,zh;q=0.9");
		httpPost.setHeader("Accept-Encoding", "gzip, deflate, br");
		httpPost.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36");*/
        packageHeader(headers, httpPost);

        // 封裝請求參數
        packageParam(params, httpPost);

        // 創建httpResponse對象
        CloseableHttpResponse httpResponse = null;

        try {
            // 執行請求並獲得響應結果
            return getHttpClientResult(httpResponse, httpClient, httpPost);
        } finally {
            // 釋放資源
            release(httpResponse, httpClient);
        }
    }

    /***
     * 發送Post有些這封裝代碼
     * 封裝formdata數據
     */
    public static void packageFormData(Map<String,String> params,HttpEntityEnclosingRequestBase HttpMethod){
        List<NameValuePair> paramList = new ArrayList <NameValuePair>();
        if(params != null && params.size() > 0){
            Set<String> keySet = params.keySet();
            for(String key : keySet) {
                paramList.add(new BasicNameValuePair(key, params.get(key)));
            }
        }
        HttpMethod.setEntity(new UrlEncodedFormEntity(paramList,Charset.forName("UTF-8")));
        System.out.println(paramList);
    }

    /**
     * 封裝Raw數據
     * */
    public static void packageRaw(String raw,HttpEntityEnclosingRequestBase HttpMethod){
        try {
            //傳map進來需要自己封裝key,val
            StringEntity postingString = new StringEntity(raw);// json傳遞
            HttpMethod.setEntity(postingString);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

    }


    /**
     * 發送put請求；不帶請求參數
     *
     * @param url 請求地址
     * @return
     * @throws Exception
     */
    public static HttpClientResult doPut(String url) throws Exception {
        return doPut(url);
    }

    /**
     * 發送put請求；帶請求參數
     *
     * @param url 請求地址
     * @param params 參數集合
     * @return
     * @throws Exception
     */
    public static HttpClientResult doPut(String url, Map<String, String> params) throws Exception {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPut httpPut = new HttpPut(url);
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
        httpPut.setConfig(requestConfig);

        packageParam(params, httpPut);

        CloseableHttpResponse httpResponse = null;

        try {
            return getHttpClientResult(httpResponse, httpClient, httpPut);
        } finally {
            release(httpResponse, httpClient);
        }
    }

    /**
     * 發送delete請求；不帶請求參數
     *
     * @param url 請求地址
     * @return
     * @throws Exception
     */
    public static HttpClientResult doDelete(String url) throws Exception {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpDelete httpDelete = new HttpDelete(url);
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
        httpDelete.setConfig(requestConfig);

        CloseableHttpResponse httpResponse = null;
        try {
            return getHttpClientResult(httpResponse, httpClient, httpDelete);
        } finally {
            release(httpResponse, httpClient);
        }
    }

    /**
     * 發送delete請求；帶請求參數
     *
     * @param url 請求地址
     * @param params 參數集合
     * @return
     * @throws Exception
     */
    public static HttpClientResult doDelete(String url, Map<String, String> params) throws Exception {
        if (params == null) {
            params = new HashMap<String, String>();
        }

        params.put("_method", "delete");
        return doPost(url, params);
    }

    /**
     * Description: 封裝請求頭
     * @param params
     * @param httpMethod
     */
    public static void packageHeader(Map<String, String> params, HttpRequestBase httpMethod) {
        // 封裝請求頭
        if (params != null) {
            Set<Map.Entry<String, String>> entrySet = params.entrySet();
            for (Map.Entry<String, String> entry : entrySet) {
                // 設置到請求頭到HttpRequestBase對象中
                httpMethod.setHeader(entry.getKey(), entry.getValue());
            }
        }
    }

    /**
     * Description: 封裝請求參數
     *
     * @param params
     * @param httpMethod
     * @throws UnsupportedEncodingException
     */
    public static void packageParam(Map<String, String> params, HttpEntityEnclosingRequestBase httpMethod)
            throws UnsupportedEncodingException {
        // 封裝請求參數
        if (params != null) {
            List<NameValuePair> nvps = new ArrayList<NameValuePair>();
            Set<Map.Entry<String, String>> entrySet = params.entrySet();
            for (Map.Entry<String, String> entry : entrySet) {
                nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
            }

            // 設置到請求的http對象中
            httpMethod.setEntity(new UrlEncodedFormEntity(nvps, ENCODING));
        }
    }

    /**
     * Description: 獲得響應結果
     *
     * @param httpResponse
     * @param httpClient
     * @param httpMethod
     * @return
     * @throws Exception
     */
    public static HttpClientResult getHttpClientResult(CloseableHttpResponse httpResponse,
                                                       CloseableHttpClient httpClient, HttpRequestBase httpMethod) throws Exception {
        // 執行請求
        httpResponse = httpClient.execute(httpMethod);
        // 獲取返回結果
        if (httpResponse != null && httpResponse.getStatusLine() != null) {
            String content = "";
            if (httpResponse.getEntity() != null) {
                content = EntityUtils.toString(httpResponse.getEntity(), ENCODING);
            }
            return new HttpClientResult(httpResponse.getStatusLine().getStatusCode(),content);
        }
        return new HttpClientResult(HttpStatus.SC_INTERNAL_SERVER_ERROR);
    }

    /**
     * Description: 釋放資源
     *
     * @param httpResponse
     * @param httpClient
     * @throws IOException
     */
    public static void release(CloseableHttpResponse httpResponse, CloseableHttpClient httpClient) throws IOException {
        // 釋放資源
        if (httpResponse != null) {
            httpResponse.close();
        }
        if (httpClient != null) {
            httpClient.close();
        }
    }

}