Java -对登录页面执行post请求

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

public class LoginRequest {
    public static void main(String[] args) {
        try {
            // 创建URL对象
            URL url = new URL("http://example.com/login");
            
            // 创建HttpURLConnection对象
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            
            // 设置请求方法为POST
            connection.setRequestMethod("POST");
            
            // 设置请求参数
            String params = "username=admin&password=123456";
            connection.setDoOutput(true);
            OutputStream outputStream = connection.getOutputStream();
            outputStream.write(params.getBytes());
            outputStream.flush();
            outputStream.close();
            
            // 获取响应结果
            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                String line;
                StringBuilder response = new StringBuilder();
                while ((line = reader.readLine()) != null) {
                    response.append(line);
                }
                reader.close();
                
                System.out.println("登录成功，响应结果：" + response.toString());
            } else {
                System.out.println("登录失败，响应码：" + responseCode);
            }
            
            // 断开连接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}