Java POST(x-www-form-urlencoded)請求

平時都是喜歡用JSON，這種也是第一次。這兩種的區(qū)別就是傳遞參數(shù)類型不一樣。廢話不多說，直接上代碼

1、引入maven包

<dependency>
  <groupId>commons-httpclient</groupId>
  <artifactId>commons-httpclient</artifactId>
  <version>3.1</version>
</dependency>

2、代碼實(shí)現(xiàn)

try {
  String postURL
  PostMethod postMethod = null;
  postMethod = new PostMethod(postURL) ;
  postMethod.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8") ;
//參數(shù)設(shè)置，需要注意的就是里邊不能傳NULL，要傳空字符串
  NameValuePair[] data = {
          new NameValuePair("startTime",""),
          new NameValuePair("endTime","")            
  };
  postMethod.setRequestBody(data);
  org.apache.commons.httpclient.HttpClient httpClient = new org.apache.commons.httpclient.HttpClient();
  int response = httpClient.executeMethod(postMethod); // 執(zhí)行POST方法
  String result = postMethod.getResponseBodyAsString() ;
  return result;
} catch (Exception e) {
  logger.info("請求異常"+e.getMessage(),e);
  throw new RuntimeException(e.getMessage());
}

3、POSTMAN參數(shù)組裝

使用post 請求x-www-form-urlencoded格式數(shù)據(jù)

代碼如下：

public String getMsg() {
  String result = "";
  try {
      URL url = new URL("https://XXXX.cn/token");
      //通過調(diào)用url.openConnection()來獲得一個新的URLConnection對象，并且將其結(jié)果強(qiáng)制轉(zhuǎn)換為HttpURLConnection.
      HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
      urlConnection.setRequestMethod("POST");
      //設(shè)置連接的超時值為30000毫秒，超時將拋出SocketTimeoutException異常
      urlConnection.setConnectTimeout(30000);
      //設(shè)置讀取的超時值為30000毫秒，超時將拋出SocketTimeoutException異常
      urlConnection.setReadTimeout(30000);
      //將url連接用于輸出，這樣才能使用getOutputStream()。getOutputStream()返回的輸出流用于傳輸數(shù)據(jù)
      urlConnection.setDoOutput(true);
      //設(shè)置通用請求屬性為默認(rèn)瀏覽器編碼類型
      urlConnection.setRequestProperty("content-type", "application/x-www-form-urlencoded");
      //getOutputStream()返回的輸出流，用于寫入?yún)?shù)數(shù)據(jù)。
      OutputStream outputStream = urlConnection.getOutputStream();
      String content = "grant_type=password&app_key="+APP_KEY+"&app_secret="+APP_SECRET;
      outputStream.write(content.getBytes());
      outputStream.flush();
      outputStream.close();
      //此時將調(diào)用接口方法。getInputStream()返回的輸入流可以讀取返回的數(shù)據(jù)。
      InputStream inputStream = urlConnection.getInputStream();
      byte[] data = new byte[1024];
      StringBuilder sb = new StringBuilder();
      //inputStream每次就會將讀取1024個byte到data中，當(dāng)inputSteam中沒有數(shù)據(jù)時，inputStream.read(data)值為-1
      while (inputStream.read(data) != -1) {
          String s = new String(data, Charset.forName("utf-8"));
          sb.append(s);
      }
      result = sb.toString();
      inputStream.close();
  } catch (IOException e) {
      e.printStackTrace();
  }
  return result;
}

以上為個人經(jīng)驗(yàn)，希望能給大家一個參考，也希望大家多多支持服務(wù)器之家。

原文鏈接：https://blog.csdn.net/Commander_Officer/article/details/86471664