DuerOS OAUTH2.0 java 代码方法参数 demo 示例

以下是一个简单的 DuerOS OAUTH2.0 Java 代码示例：

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Scanner;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.fluent.Form;
import org.apache.http.client.fluent.Request;
import org.apache.http.client.utils.URIBuilder;

public class DuerOSOAuth2Demo {

    private static final String CLIENT_ID = "your_client_id";
    private static final String CLIENT_SECRET = "your_client_secret";
    private static final String REDIRECT_URI = "your_redirect_uri";

    public static void main(String[] args) throws ClientProtocolException, IOException, URISyntaxException {
        // Step 1: Get Authorization Code
        String authorizationCode = getAuthorizationCode();

        // Step 2: Get Access Token
        String accessToken = getAccessToken(authorizationCode);
        System.out.println("Access Token: " + accessToken);
    }

    private static String getAuthorizationCode() throws URISyntaxException {
        URI authUri = new URIBuilder("https://openapi.baidu.com/oauth/2.0/authorize")
                .addParameter("response_type", "code")
                .addParameter("client_id", CLIENT_ID)
                .addParameter("redirect_uri", REDIRECT_URI)
                .build();
        System.out.println("Please authorize the application by visiting the following URL:");
        System.out.println(authUri.toString());
        System.out.print("Enter the authorization code: ");
        Scanner scanner = new Scanner(System.in);
        String authorizationCode = scanner.nextLine();
        scanner.close();
        return authorizationCode;
    }

    private static String getAccessToken(String authorizationCode) throws ClientProtocolException, IOException {
        String tokenUri = "https://openapi.baidu.com/oauth/2.0/token";
        String response = Request.Post(tokenUri)
                .bodyForm(Form.form()
                        .add("grant_type", "authorization_code")
                        .add("code", authorizationCode)
                        .add("client_id", CLIENT_ID)
                        .add("client_secret", CLIENT_SECRET)
                        .add("redirect_uri", REDIRECT_URI)
                        .build())
                .execute()
                .returnContent()
                .asString();
        String accessToken = response.split("&")[0].split("=")[1];
        return accessToken;
    }
}

在上面的代码中，我们首先在 `getAuthorizationCode` 方法中生成了授权 URL，并提示用户访问该 URL 来授权我们的应用程序。然后，我们等待用户输入授权代码，并在 `getAccessToken` 方法中使用该代码来获取访问令牌。

请注意，在上面的代码中，我们使用了 Apache HttpComponents 库来发送 HTTP 请求。您需要将其添加到您的项目依赖项中，以便代码可以编译和运行。