Question

我正在尝试将一些参数发布到外部网址，同时重定向到它。我尝试了httpclient方法，他们发布数据但不重定向到外部网址。有任何想法吗？这是我的代码：试试{

        HttpClient httpClient = new HttpClient();
        PostMethod postMethod = new PostMethod("https://paymentsite.com/pay") {
            @Override
            public boolean getFollowRedirects() {
                System.out.println("Overrriding the HttpClient Follow Redirect switch.");
                return true;
            }
        };;
        try {
            //httpClient
            postMethod.addParameter("amt","850");
            postMethod.addParameter("pid","155");
            httpClient.executeMethod(postMethod);

            if (postMethod.getStatusCode() == HttpStatus.SC_OK) {
                //now i want the user to be redirected to the external site. with the post parameters...

            } else {
            }
        } catch (Exception e) {
            System.out.println("Exception : " + e.toString());
            e.printStackTrace();
        }

    } catch (Exception e) {
        System.out.println("exception main: " + e.toString());
        e.printStackTrace();
    }

Answer 1

您的问题风格通常不受欢迎。您应该向我们提供一些代码并告诉我们您尝试了什么，但是这个问题类似于我猜测您正在寻找的问题，并且我会附上接受的代码答案答案

Question Here 来自@alan geleynse的回答

String urlParameters = "param1=a&param2=b&param3=c";
String request = "http://example.com/index.php";
URL url = new URL(request); 
HttpURLConnection connection = (HttpURLConnection) url.openConnection();           
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setInstanceFollowRedirects(false); 
connection.setRequestMethod("POST"); 
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 
connection.setRequestProperty("charset", "utf-8");
connection.setRequestProperty("Content-Length", "" + Integer.toString(urlParameters.getBytes().length));
connection.setUseCaches (false);

DataOutputStream wr = new DataOutputStream(connection.getOutputStream ());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
connection.disconnect();

Answer 2

无法重定向HTTP POST请求。

10.3重定向3xx

此类状态代码表示用户代理需要采取进一步操作才能完成请求。当且仅当第二个请求中使用的方法是GET或HEAD时，所需的操作可以由用户代理执行而不与用户交互。

参考：

http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3

从java后端发布表单并重定向到它

2 个答案: