java post重定向_java实现响应重定向发送post请求操作示例

好的，我知道你的问题了。关于Java实现响应重定向并发送POST请求的操作示例，可以参考以下代码：

import java.net.HttpURLConnection;
import java.net.URL;
import java.io.OutputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class RedirectAndPost {
    public static void main(String[] args) throws Exception {
        String url = "http://www.example.com/redirect";
        String postBody = "param1=value1&param2=value2";

        HttpURLConnection connection = null;
        URL redirectUrl = new URL(url);

        while (true) {
            connection = (HttpURLConnection) redirectUrl.openConnection();
            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(postBody.getBytes().length));
            connection.setUseCaches(false);
            connection.setDoOutput(true);

            OutputStream outputStream = connection.getOutputStream();
            outputStream.write(postBody.getBytes("UTF-8"));
            outputStream.flush();
            outputStream.close();

            int statusCode = connection.getResponseCode();
            if (statusCode == HttpURLConnection.HTTP_MOVED_TEMP || statusCode == HttpURLConnection.HTTP_MOVED_PERM || statusCode == HttpURLConnection.HTTP_SEE_OTHER) {
                String redirectLocation = connection.getHeaderField("Location");
                redirectUrl = new URL(redirectLocation);
                continue;
            } else {
                BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
                String line = null;
                StringBuilder responseBuilder = new StringBuilder();
                while ((line = reader.readLine()) != null) {
                    responseBuilder.append(line);
                }
                reader.close();
                String response = responseBuilder.toString();
                System.out.println(response);
                break;
            }
        }
    }
}

这个示例代码实现了向一个URL发送POST请求，并在接收到重定向响应时自动跟随重定向并重新发送POST请求。注意，我们在第一次请求时将`setInstanceFollowRedirects`方法设置为`false`，以便我们能够手动处理重定向响应。当我们接收到重定向响应时，从响应头中获取重定向URL，并将其存储在`redirectUrl`变量中，然后继续重新发送POST请求，直到我们接收到最终响应为止。