班车查询源码通常涉及数据库查询、前端展示和后端逻辑。具体实现可使用SQL查询数据库中班车信息,通过HTML/CSS构建用户界面,并采用JavaScript或服务器端语言处理请求与响应。
班车查询系统源码

在构建一个班车查询系统时,我们需要考虑多个方面,比如数据存储、用户界面和后端逻辑,这里,我们将使用Python Flask框架来创建一个简单的Web应用,并结合SQLite数据库进行数据存储。
1. 环境搭建
确保你的开发环境已经安装了以下工具:
Python 3.8+
Flask
SQLite
你可以通过pip安装Flask:

pip install flask flask_sqlalchemy
2. 项目结构
bus_query_system/ │── app.py │── models.py │── templates/ │ └── index.html │── static/ │ ├── css/ │ │ └── styles.css │ └── js/ │ └── scripts.js └── database.db
3. 数据库模型 (models.py)
我们将使用SQLAlchemy ORM来定义我们的数据库模型,假设我们需要存储班车信息和站点信息。
from flask_sqlalchemy import SQLAlchemy db = SQLAlchemy() class Bus(db.Model): id = db.Column(db.Integer, primary_key=True) route_number = db.Column(db.String(5), unique=True, nullable=False) start_station = db.Column(db.String(50), nullable=False) end_station = db.Column(db.String(50), nullable=False) departure_time = db.Column(db.Time, nullable=False) arrival_time = db.Column(db.Time, nullable=False) class Station(db.Model): id = db.Column(db.Integer, primary_key=True) name = db.Column(db.String(50), unique=True, nullable=False) buses = db.relationship('Bus', backref='start_station', lazy=True)
4. 路由与视图 (app.py)
我们设置基础的路由和视图函数。
from flask import Flask, render_template, request, jsonify from models import db, Bus, Station from flask_sqlalchemy import SQLAlchemy app = Flask(__name__) app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///database.db' db.init_app(app) @app.route('/') def index(): buses = Bus.query.all() return render_template('index.html', buses=buses) @app.route('/api/buses', methods=['GET']) def get_buses(): buses = [{'route_number': bus.route_number, 'start_station': bus.start_station, 'end_station': bus.end_station} for bus in Bus.query.all()] return jsonify({'buses': buses}) if __name__ == '__main__': app.run(debug=True)
5. HTML模板 (index.html)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF8"> <title>班车查询</title> <link rel="stylesheet" href="{{ url_for('static', filename='css/styles.css') }}"> </head> <body> <h1>班车查询系统</h1> <ul id="buslist"> {% for bus in buses %} <li>{{ bus.route_number }}: {{ bus.start_station }} 到 {{ bus.end_station }}</li> {% endfor %} </ul> <script src="{{ url_for('static', filename='js/scripts.js') }}"></script> </body> </html>
6. 相关问题与解答
Q1: 如何添加新的班车信息?

A1: 你可以通过扩展app.py
中的代码来添加一个新的端点,该端点允许通过HTTP POST请求接收班车信息并将其保存到数据库中。
@app.route('/add_bus', methods=['POST']) def add_bus(): route_number = request.form['route_number'] start_station = request.form['start_station'] end_station = request.form['end_station'] departure_time = request.form['departure_time'] arrival_time = request.form['arrival_time'] new_bus = Bus(route_number=route_number, start_station=start_station, end_station=end_station, departure_time=departure_time, arrival_time=arrival_time) db.session.add(new_bus) db.session.commit() return "Bus added successfully."
Q2: 如何更新现有的班车信息?
A2: 为了更新班车信息,你需要创建一个API端点来处理PUT请求,并在请求体中包含要更新的信息。
@app.route('/update_bus/<int:bus_id>', methods=['PUT']) def update_bus(bus_id): bus = Bus.query.get(bus_id) if 'route_number' in request.form: bus.route_number = request.form['route_number'] if 'start_station' in request.form: bus.start_station = request.form['start_station'] if 'end_station' in request.form: bus.end_station = request.form['end_station'] if 'departure_time' in request.form: bus.departure_time = request.form['departure_time'] if 'arrival_time' in request.form: bus.arrival_time = request.form['arrival_time'] db.session.commit() return "Bus updated successfully."