Java原生類庫發送 get post 請求

使用Java原生類庫發送get post請求

• 下面是整個工具的全部代碼，其中用到了fastjson：

  package util;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.OutputStreamWriter;
  import java.net.HttpURLConnection;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.util.Map;
  import com.alibaba.fastjson.JSON;
  
  
  public class HttpUtil {
  
  
      public static String sendGet(String httpurl) {
          HttpURLConnection connection = null;
          InputStream is = null;
          BufferedReader br = null;
          String result = null;// 返回結果字符串
          try {
              // 創建遠程url連接對象
              URL url = new URL(httpurl);
              // 通過遠程url連接對象打開一個連接，強轉成httpURLConnection類
              connection = (HttpURLConnection) url.openConnection();
              // 設置連接方式：get
              connection.setRequestMethod("GET");
              // 設置連接主機服務器的超時時間：15000毫秒
              connection.setConnectTimeout(15000);
              // 設置讀取遠程返回的數據時間：60000毫秒
              connection.setReadTimeout(60000);
              // 發送請求
              connection.connect();
              // 通過connection連接，獲取輸入流
              if (connection.getResponseCode() == 200) {
                  is = connection.getInputStream();
                  // 封裝輸入流is，並指定字符集
                  br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                  // 存放數據
                  StringBuffer sbf = new StringBuffer();
                  String temp = null;
                  while ((temp = br.readLine()) != null) {
                      sbf.append(temp);
                      sbf.append("\r\n");
                  }
                  result = sbf.toString();
              }
          } catch (MalformedURLException e) {
              e.printStackTrace();
          } catch (IOException e) {
              e.printStackTrace();
          } finally {
              // 關閉資源
              if (null != br) {
                  try {
                      br.close();
                  } catch (IOException e) {
                      e.printStackTrace();
                  }
              }
      
              if (null != is) {
                  try {
                      is.close();
                  } catch (IOException e) {
                      e.printStackTrace();
                  }
              }
      
              connection.disconnect();// 關閉遠程連接
          }
      
          return result;
      }
  
      
      
  
      
      
      
      
      public static String sendPost(String URL,Map<String, Object> map){
          OutputStreamWriter out = null;
          BufferedReader in = null;
          StringBuilder result = new StringBuilder();
          HttpURLConnection conn = null;
          try{
              URL url = new URL(URL);
              conn = (HttpURLConnection) url.openConnection();
              conn.setRequestMethod("POST");
              //發送POST請求必須設置爲true
              conn.setDoOutput(true);
              conn.setDoInput(true);
              //設置連接超時時間和讀取超時時間
              conn.setConnectTimeout(30000);
              conn.setReadTimeout(10000);
              conn.setRequestProperty("Content-Type", "application/json");
              conn.setRequestProperty("Accept", "application/json");
              //獲取輸出流
              out = new OutputStreamWriter(conn.getOutputStream());
      //                String jsonStr = "{\"qry_by\":\"name\", \"name\":\"Tim\"}";
              String jsonStr = JSON.toJSONString(map);
  
              out.write(jsonStr);
              out.flush();
              out.close();
              //取得輸入流，並使用Reader讀取
              if (200 == conn.getResponseCode()){
                  in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
                  String line;
                  while ((line = in.readLine()) != null){
                      result.append(line);
                  }
              }else{
                  System.out.println("ResponseCode is an error code:" + conn.getResponseCode());
              }
          }catch (Exception e){
              e.printStackTrace();
          }finally {
              try{
                  if(out != null){
                      out.close();
                  }
                  if(in != null){
                      in.close();
                  }
              }catch (IOException ioe){
                  ioe.printStackTrace();
              }
          }
          return result.toString();
      }
  
  }
  

• 在 2019年9月3日 15:50:51 測試通過，post方法中參數採用map 類型 兼容性更好，可以和spring 配置使用