URL url = new URL("http://api.fanyi.baidu.com/api/trans/vip/translate");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
String param = "from=en&to=zh&appid=your_app_id&q=Hello";
OutputStream outputStream = connection.getOutputStream();
outputStream.write(param.getBytes());
outputStream.flush();
outputStream.close();

BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
    stringBuilder.append(line);
}
reader.close();

String result = stringBuilder.toString();
System.out.println(result);

Gson gson = new Gson();
TranslationResult translationResult = gson.fromJson(result, TranslationResult.class);

System.out.println(translationResult.transResult.get(0).dst);

public class TranslationApp extends Application {

    private TextField inputTextField;
    private TextArea outputTextArea;

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        Label inputLabel = new Label("輸入內(nèi)容：");
        inputTextField = new TextField();
        Label outputLabel = new Label("翻譯結(jié)果：");
        outputTextArea = new TextArea();
        outputTextArea.setEditable(false);
        Button translateButton = new Button("翻譯");
        translateButton.setOnAction(event -> translate());

        VBox root = new VBox();
        root.setSpacing(10);
        root.setPadding(new Insets(10));
        root.getChildren().addAll(inputLabel, inputTextField, outputLabel, outputTextArea, translateButton);

        Scene scene = new Scene(root, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.setTitle("在線翻譯系統(tǒng)");
        primaryStage.show();
    }

    private void translate() {
        // 發(fā)送HTTP請(qǐng)求，并解析翻譯結(jié)果
        String result = sendHttpRequest(inputTextField.getText());
        Gson gson = new Gson();
        TranslationResult translationResult = gson.fromJson(result, TranslationResult.class);

        // 更新翻譯結(jié)果到界面
        outputTextArea.setText(translationResult.transResult.get(0).dst);
    }

    private String sendHttpRequest(String text) {
        // TODO：發(fā)送HTTP請(qǐng)求并返回翻譯結(jié)果
    }

}