from flask import Flask, jsonify

app = Flask(__name__)

# 模擬的用戶數(shù)據(jù)庫(kù)
users = {
    1: {"name": "Alice", "age": 30},
    2: {"name": "Bob", "age": 25},
}

@app.route('/api/users/<int:user_id>', methods=['GET'])
def get_user(user_id):
    user = users.get(user_id)
    if user:
        return jsonify(user), 200
    else:
        return jsonify({"error": "User not found"}), 404

if __name__ == '__main__':
    app.run(port=5000)

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

public class UserService {
    private static final String BASE_URL = "http://localhost:5000/api/users/";

    public static void main(String[] args) {
        int userId = 1;
        try {
            String userInfoJson = getUserInfo(userId);
            System.out.println("User Info: " + userInfoJson);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static String getUserInfo(int userId) throws Exception {
        URL url = new URL(BASE_URL + userId);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");

        if (connection.getResponseCode() == 200) {
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            StringBuilder response = new StringBuilder();
            String inputLine;

            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            in.close();
            return response.toString();
        } else {
            throw new Exception("Failed to get user info: " + connection.getResponseCode());
        }
    }
}

stateDiagram
    [*] --> 提交請(qǐng)求
    提交請(qǐng)求 --> 等待響應(yīng)
    等待響應(yīng) --> 響應(yīng)成功 : 成功
    等待響應(yīng) --> 響應(yīng)失敗 : 失敗
    響應(yīng)成功 --> [*]
    響應(yīng)失敗 --> [*]

erDiagram
    USER {
        int id PK
        string name
        int age
    }
    PO_SPMACH {
        int id PK
        string status
    }
    JAVA_APP {
        int id PK
        string description
    }

    USER ||--o| PO_SPMACH : interacts_with
    JAVA_APP ||--o| PO_SPMACH : communicates_via