需要json数组的Express restful api

const express = require('express');
const app = express();
const port = 3000;

// 假设我们有一个简单的JSON数组
const items = [
  { id: 1, name: 'Item One' },
  { id: 2, name: 'Item Two' },
  { id: 3, name: 'Item Three' }
];

// 创建一个GET路由来获取所有items
app.get('/api/items', (req, res) => {
  res.json(items);
});

// 启动服务器
app.listen(port, () => {
  console.log(`Server running on port ${port}`);
});

app.get('/api/items', (req, res) => {
  const page = parseInt(req.query.page) || 1;
  const limit = parseInt(req.query.limit) || 10;
  const startIndex = (page - 1) * limit;
  const endIndex = page * limit;

  const results = {};

  if (endIndex < items.length) {
    results.next = {
      page: page + 1,
      limit: limit
    };
  }

  if (startIndex > 0) {
    results.previous = {
      page: page - 1,
      limit: limit
    };
  }

  results.results = items.slice(startIndex, endIndex);
  res.json(results);
});