皮一下，给自己做个打卡系统

/**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {    //先获取openid，openid会被保存在全局变量globalData中
    app.jscode2session(res=>{      var nowDate = new Date();//当前日期
      this.initCalendar(nowDate);//加载日历
    });
  },  /**
   * 初始化日历，
   * signDates ： 已经签到的日期，一般在月份切换的时候从后台获取日期，
   * 然后在获取日历数据时，进行数据比对处理；
   * */
  initCalendar: function (paramDate, signDates) {    //从服务器端获取signDates
    var paramMonth = paramDate.getMonth();    if (paramMonth + 1 > 12){//后台保存的月份数据是 1-12
      paramMonth = 1;
    }else{
      paramMonth += 1;
    }    var paramYear = paramDate.getFullYear();
    wx.request({      url: app.HTTP_SERVER + 'xcx/rest/getSignDates.htm',      data: {        openid: app.globalData.openid,        year: paramYear,        month: paramMonth
      },      header: {        'content-type': 'application/json' // 默认值
      },      success: res => {        //后台返回的日期
        var signDates  = res.data;        //当前年月日
        var now = new Date();//当前时间
        var nowMonth = now.getMonth();        var nowYear = now.getFullYear();        var showSign = false;//是否显示签到按钮
        if (nowMonth === paramDate.getMonth()
          && nowYear === paramDate.getFullYear()) {
          showSign = true;
        }        //未来签到日期设置为空
        if (nowMonth < paramDate.getMonth()
          && nowYear <= paramDate.getFullYear()) {
          signDates = [];
        }        //星期
        var days = ["日", "一", "二", "三", "四", "五", "六"];        //签到日历数据的生成
        var calendars = Calendar.getSignCalendar(paramDate, signDates);        this.setData({          signDates: signDates,          year: paramDate.getFullYear(),          month: paramDate.getMonth() + 1,          calendars: calendars,          days: days,          preMonth: "<",   //大于、小于号不可以直接写在wxml中
          nextMonth: ">",          showSign: showSign
        });
      },      fail: function (res) {        console.log(res);
      }
    });
  },

package com.spring.mvc.xcx;import java.util.ArrayList;import java.util.List;import net.sf.json.JSONArray;import net.sf.json.JSONException;import net.sf.json.JSONObject;import org.apache.commons.collections.CollectionUtils;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import com.spring.mvc.xcx.dao.UserSignDate;import com.spring.mvc.xcx.dao.UserSignDateDao;import com.spring.mvc.xcx.util.CalendarUtil;/**
 * 这是小程序-小诗词的rest请求
 */@Controller@RequestMapping("/xcx/rest")public class RestController {    // dao 的注入
    @Autowired
    private UserSignDateDao userSignDateDao;    @RequestMapping("/getOpenid")    @ResponseBody
    public String getOpenid(String jscode){        //微信小程序id
        String appId = "wxb85f9dadsc8d37c6cd";  
        //微信小程序Secret
        String appSecret = "b9cae0487dsdsb1e57a5e7ebae37dec78bc5";        //获取请求的url
        String url  = WxApi.getJsCodeSessionUrl(appId, appSecret, jscode);
        JSONObject jsonObject = WxApi.httpsRequest(url, "GET", null);        //获取openid
        String openid = "";        if (null != jsonObject && !jsonObject.containsKey("errcode")) {            try {
                openid = jsonObject.getString("openid");
            } catch (JSONException e) {
            }
        }        return openid;
    }    //获取签到数据
    @RequestMapping("/getSignDates")    @ResponseBody
    public String getSignDates(String openid, Integer year, Integer month){
        UserSignDate queryEntity = new UserSignDate();
        queryEntity.setOpenid(openid);//设置用户的openid
        queryEntity.setYear(year);//设置年
        queryEntity.setMonth(month);//设置月
        //获取已经签到的数据
        List<UserSignDate> list = userSignDateDao.queryAll(queryEntity);        //将日期返回
        List<Integer> days = new ArrayList<Integer>();        if(CollectionUtils.isNotEmpty(list)){            for(UserSignDate item : list){
                days.add(item.getDay());
            }
        }        return JSONArray.fromObject(days).toString();
    }    //实现签到
    @RequestMapping("/doSign")    @ResponseBody
    public String doSign(String openid){
        UserSignDate entity = new UserSignDate();
        entity.setOpenid(openid);
        entity.setYear(CalendarUtil.getYear());
        entity.setMonth(CalendarUtil.getMonth());
        entity.setDay(CalendarUtil.getDate());        //先判断是否已经签过到
        List<UserSignDate> list = userSignDateDao.queryAll(entity);        if(CollectionUtils.isNotEmpty(list)){            //已经签过到，不做任何处理
        }else{
            userSignDateDao.create(entity);//加入今日签到数据
        }        return new JSONObject().toString();
    }

}