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

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(qǐng)求異常"+e.getMessage(),e);
    throw new RuntimeException(e.getMessage());
}

public String getMsg() {
    String result = "";
    try {
        URL url = new URL("https://XXXX.cn/token");
        //通過(guò)調(diào)用url.openConnection()來(lái)獲得一個(gè)新的URLConnection對(duì)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(shí)值為30000毫秒，超時(shí)將拋出SocketTimeoutException異常
        urlConnection.setConnectTimeout(30000);
        //設(shè)置讀取的超時(shí)值為30000毫秒，超時(shí)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(qǐng)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(shí)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(huì)將讀取1024個(gè)byte到data中，當(dāng)inputSteam中沒(méi)有數(shù)據(jù)時(shí)，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;
}