Java 發送http post 請求

標籤：accept   str   cti   lcd   end   air   length   cep   ora   

package com.sm.utils;import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.URL;import java.net.URLConnection;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import org.springframework.web.multipart.MultipartHttpServletRequest;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;public class HttpUtils {    public static final String CHARSET = "UTF-8";    // 發送get請求 url?a=x&b=xx形式    public static String sendGet(String url, String param) {        String result = "";        BufferedReader in = null;        try {            String urlName = "";            if (param.length() != 0) {                urlName = url + "?" + param;            } else                urlName = url;            URL resUrl = new URL(urlName);            URLConnection urlConnec = resUrl.openConnection();            urlConnec.setRequestProperty("accept", "*/*");            urlConnec.setRequestProperty("connection", "Keep-Alive");            urlConnec.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");            urlConnec.connect();            Map<String, List<String>> map = urlConnec.getHeaderFields();            for (String key : map.keySet()) {                System.out.println(key + "--->" + map.get(key));            }            // 定義 BufferedReader輸入資料流來讀取URL的響應            in = new BufferedReader(new InputStreamReader(urlConnec.getInputStream()));            String line;            while ((line = in.readLine()) != null) {                result += line;            }        } catch (Exception e) {            System.out.println("發送get請求失敗" + e);            e.printStackTrace();        } finally {            try {                if (in != null) {                    in.close();                }            } catch (Exception e) {                e.printStackTrace();            }        }        return result;    }    // 發送post請求    public static String sendPost(String url, MultipartHttpServletRequest param) {        String result = "";        PrintWriter out = null;        BufferedReader in = null;        try {            URL resUrl = new URL(url);            URLConnection urlConnec = resUrl.openConnection();            urlConnec.setRequestProperty("accept", "*/*");            urlConnec.setRequestProperty("connection", "Keep-Alive");            urlConnec.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");            // 發送POST請求必須設定如下兩行            urlConnec.setDoInput(true);            urlConnec.setDoOutput(true);            out = new PrintWriter(urlConnec.getOutputStream());            out.print(param);// 發送post參數            out.flush();            // 定義 BufferedReader輸入資料流來讀取URL的響應            in = new BufferedReader(new InputStreamReader(urlConnec.getInputStream()));            String line;            while ((line = in.readLine()) != null) {                result += line;            }        } catch (Exception e) {            System.out.println("post請求發送失敗" + e);            e.printStackTrace();        } finally {            try {                if (in != null) {                    in.close();                }                if (out != null) {                    out.close();                }            } catch (Exception e) {                e.printStackTrace();            }        }        return result;    }            //post要求方法    public static  String sendPost(String url, Map<String,Object> params) {       String response = null;       System.out.println(url);       System.out.println(params);       try {           List<NameValuePair> pairs = null;            if (params != null && !params.isEmpty()) {                pairs = new ArrayList<NameValuePair>(params.size());                for (String key : params.keySet()) {                    pairs.add(new BasicNameValuePair(key, params.get(key).toString()));            }            }           CloseableHttpClient httpclient = null;           CloseableHttpResponse httpresponse = null;           try {               httpclient = HttpClients.createDefault();               HttpPost httppost = new HttpPost(url);              // StringEntity stringentity = new StringEntity(data);               if (pairs != null && pairs.size() > 0) {                   httppost.setEntity(new UrlEncodedFormEntity(pairs, CHARSET));               }               httpresponse = httpclient.execute(httppost);               response = EntityUtils                       .toString(httpresponse.getEntity());               System.out.println(response);           } finally {               if (httpclient != null) {                   httpclient.close();               }               if (httpresponse != null) {                   httpresponse.close();               }           }       } catch (Exception e) {           e.printStackTrace();       }       return response;    }    public static void main(String[] args) {        Map<String,Object> map = new HashMap<String,Object>();        map.put("id","123456666");        sendPost("http://192.168.1.56:8080/smkj/api/lcds/user/lcdsUser",map);    }    /**     * 測試     * 說明：這裡用新浪股票介面做get測試,新浪股票介面不支援jsonp,至於post,因為本人用的公司的介面就不展示了,一樣的,一個url,一個資料包     */    /*     * public static void main(String[] args) { // TODO Auto-generated method     * stub String resultGet = sendGet("http://hq.sinajs.cn/list=sh600389","");     * System.out.println(resultGet); }     */}

 

Java 發送http post 請求