Java HttpURLConnection – 带Cookie的POST

发布时间：2020-12-15 00:25:08 所属栏目：Java 来源：网络整理

导读：我想发送一个带有cookies的发布请求.这是代码： try { String query = URLEncoder.encode("key","UTF-8") + "=" + URLEncoder.encode("value","UTF-8"); String cookies = "session_cookie=value"; URL url = new URL("https://myweb"); HttpsURLConnection

我想发送一个带有cookies的发布请求.这是代码：

try {

    String query = URLEncoder.encode("key","UTF-8") + "=" + URLEncoder.encode("value","UTF-8");
    String cookies = "session_cookie=value";
    URL url = new URL("https://myweb");
    HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();

    conn.setRequestProperty("Cookie",cookies);
    conn.setRequestMethod("POST");
    conn.setDoInput(true);
    conn.setDoOutput(true);

    DataOutputStream out = new DataOutputStream(conn.getOutputStream());
    out.writeBytes(query);
    out.flush();
    out.close();

    BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    String decodedString;
    while ((decodedString = in.readLine()) != null) {
        System.out.println(decodedString);
    }
    in.close();

    // Send the request to the server
    //conn.connect();
} catch (MalformedURLException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}

问题是请求没有cookie发送.如果我只做：
conn.connect();并且不发送数据,cookie被发送好了.
我不能正确地检查发生了什么,因为连接是骗取SSL.我只检查响应.

解决方法

根据URLConnection javadoc：

The following methods are used to access the header fields and the 
contents AFTER the connection is made to the remote object:

* getContent
* getHeaderField
* getInputStream
* getOutputStream

您是否确认在上述测试用例中,请求正在到达服务器？我看到你已经在getOutputStream()之后调用connect()并且被注释掉了.如果您取消注释并在调用getOutputStream()之前向上移动会发生什么？

（编辑：李大同）

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