1.根目录新建一个js，例如：config.js
```
/**
* 小程序配置文件
*/
var host = 'http://39.97.242.26:8001'; //测试
var config = {
service: {
host,
login: `${host}/login`, //获取客户列表
}
};
module.exports = config;
```
2.新建一个js用来封装请求（位置随便），例如：util.js
把需要的导出
```
//请求数据
function getRequest(url, params, callback) {
this.showBusy('加载中...');
wx.request({
url: url,
data: params,
method: 'POST',
header: { 'content-type': 'application/x-www-form-urlencoded' },
success: function (result) {
if (result.data.code == '10000') {
wx.hideToast();
var result = result.data;
callback(result.data);
} else {
wx.hideToast();
wx.showModal({
title: '提示',
content: '加载失败，请重新刷新',
showCancel: false
});
return false;
}
},
fail(error) {
wx.hideToast();
wx.showModal({
title: '提示',
content: '网络异常，请重新刷新',
showCancel: false
});
return false;
}
})
}
//请求数据(异步)
function getRequestPromise(url, params) {
this.showBusy('请求中...');
var token = wx.getStorageSync('weapp_session_login_data');
return new Promise(function (resolve, reject) {
wx.request({
url: url,
data: params,
method: 'POST',
header: {
'content-type': 'application/json',
'token': token.token //---------------------token验证已取消
},
success: function (result) {
if (result.data.code == '10000') {
wx.hideToast();
var results = result.data;
resolve(results.data);
} else if (result.data.code == '50001'){ //未登录
wx.hideToast();
wx.showModal({
title: '提示',
content: '您的登录已失效，请重新登录',
showCancel: false,
success(res) {
if (res.confirm) {
try {
wx.clearStorageSync();
wx.reLaunch({
url: '/pages/login/index', //绝对路径
});
} catch (e) {
return false;
}
}
}
});
return false;
} else {
wx.hideToast();
wx.showModal({
title: '提示',
content: '请求失败，请重新尝试',
showCancel: false
});
return false;
}
},
fail(error) {
wx.hideToast();
wx.showModal({
title: '提示',
content: '网络异常，请重新尝试',
showCancel: false
});
return false;
}
})
})
}
module.exports = {
getRequest: getRequest,
getRequestPromise: getRequestPromise,
}
```
3.在需要请求的页面中的js中引入两个文件
请求接口
```
getGrade: function (e) {
var that = this;
var params = {
type: 'grade'
};
util.getRequestPromise(config.service.findListByType, params)
.then(data => {
let result = data ? data : [];
//console.log(result);
that.setData({
gradeData: result
});
});
},
```
