一般模拟的数据只支持get方式，为了支持post等方式，可以采用把api转到node的路由上来实现。

const express = require('express');
const app = express();
const apiRouters = express.Router();

// 模拟的数据的地址
const paths = require('./paths'); 
const appMockup = paths.appMockup;

apiRouters.all(‘/column’, function (req, res) {

    const filepath = require.resolve(appMockup + '/column.json');
    delete require.cache[filepath];
    res.json(require(filepath));

});
apiRouters.all('/pie', function (req, res) {
    const filepath = require.resolve(appMockup + '/pie.json');
    delete require.cache[filepath];
    res.json(require(filepath));
});
apiRouters.all('/trend', function (req, res) {
    const filepath = require.resolve(appMockup + '/trend.json');
    delete require.cache[filepath];
    res.json(require(filepath));
});


module.exports = apiRouters;

// 使用方式
const express = require('express');
const app = express();
const apiRouters = require('./mockup');
app.use('/api', apiRoute

rs);

注： require函数及其辅助方法主要如下:
require(): 加载外部模块
require.resolve()：将模块名解析到一个绝对路径
require.main：指向主模块
require.cache：指向所有缓存的模块
require.extensions：根据文件的后缀名，调用不同的执行函数