微信小程序怎样连接Java后台

// api request
 request(url, params) {
  return new Promise((resolve, reject) => {
   wx.request({
    url: baseUrl + url,
    method: 'POST',
    data: params,
    success(res) {
     console.log(res.data)
     resolve(res.data)
    },
    fail(res) {
     console.log(res)
     reject(res)
    }
   })
  })
 },
 
 // api
 getHomeLayout(params) {
  return this.request('/wechat/home/getHomeLayout', params)
 },