使用Java將數據傳遞到html POST表單

Question

我有一個HTML表單，看起來像這樣：

<form name="form1" method="post" action="/confirm.asp">
    <input type="text" name="data1" size="20" value=""><br>
    <input type="text" name="data2" size="20" value=""><br>
    <input type="Submit" name=submit value="Submit">
</form>

我想使用Java將數據傳遞給data1和data2並在提交表單時讀取data2的頁面。 由於這是一個方法=帖子，我不能使用http://somesite.com/confirm.asp?data1=foo&data2=foo 。

可以幫忙嗎？

Answer 1

/* create a new URL and open a connection */
URL url = new URL("http://somesite.com/confirm.asp");
URLConnection con = url.openConnection();
con.setDoOutput(true);

/* wrapper the output stream of the connection with PrintWiter so that we can write plain text to the stream */
PrintWriter wr = new PrintWriter(con.getOutputStream(), true);

/* set up the parameters into a string and send it via the output stream */
StringBuilder parameters = new StringBuilder();
parameters.append("data1=" + URLEncoder.encode("value1", "UTF-8"));
parameters.append("&");
parameters.append("data2=" + URLEncoder.encode("value2", "UTF-8"));
wr.println(parameters);
wr.close();

/* wrapper the input stream of the connection with BufferedReader to read plain text, and print the response to the console */
BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream()));
String line;
while((line = br.readLine()) != null) System.out.println(line);
br.close();

Answer 2

這是Link的代碼。 希望這可以幫助你:)

import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpPostForm
{
  public static void main(String[] args)
  {
    try
    {
      URL url = new URL( "http://www.aaaa.com/xyz.asp" );

      HttpURLConnection hConnection = (HttpURLConnection)
                             url.openConnection();
      HttpURLConnection.setFollowRedirects( true );

      hConnection.setDoOutput( true );
      hConnection.setRequestMethod("POST"); 

      PrintStream ps = new PrintStream( hConnection.getOutputStream() );
      ps.print("param1=abcd&param2=10341");
      ps.close();

      hConnection.connect();

      if( HttpURLConnection.HTTP_OK == hConnection.getResponseCode() )
      {
        InputStream is = hConnection.getInputStream();
        OutputStream os = new FileOutputStream("output.html");
        int data;
        while((data=is.read()) != -1)
        {
          os.write(data);
        }
        is.close();
        os.close();
        hConnection.disconnect();
      }
    }
    catch(Exception ex)
    {
      ex.printStackTrace();
    }
  }
}

Answer 3

要用Java編寫POST請求，您應該通過URLConnection連接到目標URL，然后在其中寫入頭邊界的字節，邊界消息（放置鍵，值和任何其他請求數據的位置），以及結束邊界。

我為我的應用程序編寫了一個PostProcess類，它允許異步POST請求上傳，鍵值參數，文件參數（即表單中的文件上傳輸入）和上傳進度跟蹤。 它還記錄服務器響應。

為了大小和可讀性，我已將代碼外部上傳到http://textu.be/T

Answer 4

請嘗試以下代碼

String url="www.somesite.com";     
Document doc = Jsoup.connect(url).data("data1", "foo").data("data2","foo")
                .userAgent("Mozilla/5.0 (Windows; U; WindowsNT 5.1; en-US; rv1.8.1.6) Gecko/20070725 Firefox/2.0.0.6")
                .referrer("http://www.google.com").post();