帮我找个金融知识库系统的代码

金融知识库系统的代码实现需要考虑很多方面，比如后端数据库的设计、前端页面的开发、用户权限管理等。这里提供一个简单的参考代码，供你参考：

1. 数据库设计

首先，需要设计数据库来存储金融知识库的内容。以下是一个简单的示例：

CREATE TABLE article (
    id INT AUTO_INCREMENT PRIMARY KEY,
    title VARCHAR(255) NOT NULL,
    content TEXT NOT NULL,
    author VARCHAR(50) NOT NULL,
    create_time DATETIME NOT NULL
);

CREATE TABLE category (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(50) NOT NULL
);

CREATE TABLE article_category (
    article_id INT NOT NULL,
    category_id INT NOT NULL,
    PRIMARY KEY (article_id, category_id),
    FOREIGN KEY (article_id) REFERENCES article(id),
    FOREIGN KEY (category_id) REFERENCES category(id)
);

2. 后端代码

使用 Python 的 Flask 框架来实现后端代码。以下是一个简单的示例：

from flask import Flask, request, jsonify
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://user:password@localhost/dbname'
db = SQLAlchemy(app)

class Article(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(255), nullable=False)
    content = db.Column(db.Text, nullable=False)
    author = db.Column(db.String(50), nullable=False)
    create_time = db.Column(db.DateTime, nullable=False)

class Category(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50), nullable=False)

class ArticleCategory(db.Model):
    article_id = db.Column(db.Integer, db.ForeignKey('article.id'), primary_key=True)
    category_id = db.Column(db.Integer, db.ForeignKey('category.id'), primary_key=True)

@app.route('/articles', methods=['GET'])
def get_articles():
    articles = Article.query.all()
    return jsonify([article.serialize() for article in articles])

@app.route('/articles', methods=['POST'])
def create_article():
    data = request.get_json()
    article = Article(title=data['title'], content=data['content'], author=data['author'])
    db.session.add(article)
    db.session.commit()
    return jsonify(article.serialize())

@app.route('/articles/<int:id>', methods=['GET'])
def get_article(id):
    article = Article.query.get(id)
    return jsonify(article.serialize())

@app.route('/articles/<int:id>', methods=['PUT'])
def update_article(id):
    data = request.get_json()
    article = Article.query.get(id)
    article.title = data['title']
    article.content = data['content']
    article.author = data['author']
    db.session.commit()
    return jsonify(article.serialize())

@app.route('/articles/<int:id>', methods=['DELETE'])
def delete_article(id):
    article = Article.query.get(id)
    db.session.delete(article)
    db.session.commit()
    return jsonify({'message': 'Article deleted'})

if __name__ == '__main__':
    app.run(debug=True)

3. 前端代码

使用 React 框架来实现前端页面。以下是一个简单的示例：

import React, { useState, useEffect } from 'react';
import axios from 'axios';

function App() {
  const [articles, setArticles] = useState([]);
  const [title, setTitle] = useState('');
  const [content, setContent] = useState('');
  const [author, setAuthor] = useState('');

  useEffect(() => {
    axios.get('/articles')
      .then(response => setArticles(response.data))
      .catch(error => console.log(error));
  }, []);

  const handleSubmit = event => {
    event.preventDefault();
    axios.post('/articles', { title, content, author })
      .then(response => setArticles([...articles, response.data]))
      .catch(error => console.log(error));
    setTitle('');
    setContent('');
    setAuthor('');
  };

  const handleDelete = id => {
    axios.delete(`/articles/${id}`)
      .then(() => setArticles(articles.filter(article => article.id !== id)))
      .catch(error => console.log(error));
  };

  return (
    <div>
      <h1>金融知识库</h1>
      <form onSubmit={handleSubmit}>
        <input type="text" value={title} onChange={event => setTitle(event.target.value)} placeholder="标题" />
        <textarea value={content} onChange={event => setContent(event.target.value)} placeholder="内容"></textarea>
        <input type="text" value={author} onChange={event => setAuthor(event.target.value)} placeholder="作者" />
        <button type="submit">提交</button>
      </form>
      <ul>
        {articles.map(article => (
          <li key={article.id}>
            <h2>{article.title}</h2>
            <p>{article.content}</p>
            <small>{article.author} / {article.create_time}</small>
            <button onClick={() => handleDelete(article.id)}>删除</button>
          </li>
        ))}
      </ul>
    </div>
  );
}

export default App;

以上是一个简单的金融知识库系统的代码实现，供你参考。当然，实际开发中还需要考虑很多细节问题，比如用户权限管理、搜索功能、分类功能等等。