微信小程序

发布于:2024-05-08 ⋅ 阅读:(110) ⋅ 点赞:(0)

一:注册微信小程序:

  • 注册小程序
  • 完善小程序信息
  • 下载开发者工具

注册小程序:

注册地址:https://mp.weixin.qq.com/wxopen/waregister?action=step1

 选择主体类型为 “个人类型”。


查看小程序的 AppID:

下载开发者工具:

下载地址: https://developers.weixin.qq.com/miniprogram/dev/devtools/stable.html

 

 设置不校验合法域名:

了解页面结构:

 

其中js和wxml两个文件比较重要。 

 二:编写入门小程序:

1:hello world:

index.wxml:
<view class = "container">
  <view>
    {{msg}}
  </view>
index.js:
Page({
  data: {
    msg:'hello world',
    nickname: '',
    img:'',
  },
)}

2:获取微信用户的头像和昵称 :

index.wxml:
    <view>
    <button bindtap="getUserInfo" type="primary">获取用户信息</button>
    {{nickname}}
  <image style = "height: 100px;width: 100px;" src="{{img}}"></image>
  </view>
index.js:
//获取微信用户的头像和昵称 
  getUserInfo(){
    wx.getUserProfile({
      desc: '获取用户信息',
      success: (res)=>{
        console.log(res.userInfo)
        //为数据赋值
        this.setData({
          nickname:res.userInfo.nickName,
          img:res.userInfo.avatarUrl,
        })
      }
    })
  },

3:微信登录 获取登录用户的授权码:

index.wxml
 <view>
  <button type="warn" bindtap="WeCharLogin">微信登录</button>
  </view>
index.js
  WeCharLogin(){
    wx.login({
      success: (userid)=>{
        console.log(userid.code)
      }
    })
  },

4:发送请求:

index.wxml
    <view>
  <button type="default" bindtap="sendRequest">发送请求</button>
  </view>
index.js
sendRequest(){
    wx.request({
      url: 'http://localhost:8080/user/shop/status',
      method: 'GET',
      success: (res)=>{
        console.log(res.data)
      }
    })
  },

运行最后一个发送请求的代码时,需要将后端服务开启。

三:微信登录功能实现:

  • 导入小程序代码
  • 微信登录流程
  • 需求分析和设计
  • 代码开发
  • 功能测试

1:导入小程序代码:

 2:微信登录流程:

 3:需求设计和分析:

业务规则:

  • 基于微信登录实现小程序的登录功能
  • 如果是新用户需要自动完成注册

4:代码开发: 

配置为微信用户生成jwt令牌时使用的配置项:

 配置包括两个部分:

  • 配置用户端的jwt令牌
  • 配置微信的appid和secret
根据接口定义创建UserController的login方法:
Controll层代码:
package com.sky.controller.user;

import com.sky.constant.JwtClaimsConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.properties.JwtProperties;
import com.sky.result.Result;
import com.sky.service.UserService;
import com.sky.utils.JwtUtil;
import com.sky.vo.UserLoginVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.ss.formula.ptg.AreaNPtg;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;

@RestController
@RequestMapping("/user/user")
@Api(tags = "用户模块接口")
@Slf4j
public class UserController {

    @Autowired
    private UserService userService;

    @Autowired
    private JwtProperties jwtProperties;
    /**
     * 微信用户登录
     * @param userLoginDTO
     * @return
     */
    @PostMapping("/login")
    @ApiOperation("用户登录接口")
    public Result<UserLoginVO> login(@RequestBody UserLoginDTO userLoginDTO){
        log.info("用户端登录:{}",userLoginDTO.getCode());
        //获取登录的用户
        User user = userService.wxlogin(userLoginDTO);

        //生成jwt令牌
        HashMap<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.USER_ID,user.getId());
        String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(),jwtProperties.getUserTtl(),claims);
        //封装这个UserLoginVO对象
        final UserLoginVO userLoginVO = UserLoginVO.builder()
                .id(user.getId())
                .openid(user.getOpenid())
                .token(token)
                .build();
        return Result.success(userLoginVO);
    }
}
创建UserServiceImpl实现类
  1. 调用微信接口服务,获取当前微信用户的openid(httpt)
  2. 解析由httpclient返回的json格式的数据
  3. 判断这个openid是否为空,为空直接抛出异常
  4. 判断是否为新用户
  5. 如果是新用户,自动完成注册
Service层代码:
package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    //微信服务接口地址
    private final static String WX_Login = "https://api.weixin.qq.com/sns/jscode2session";
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务,获得当前微信用户的openid
        final HashMap<String, String> map = getStringStringHashMap(userLoginDTO);
        String json = HttpClientUtil.doGet(WX_Login, map);//返回值是一个json格式的数据
        //解析这个JSON的数据
        final JSONObject jsonObject = JSON.parseObject(json);
        final String openid = jsonObject.getString("openid");
        //判断openid是否为空 为空,直接抛业务异常
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
         User user = userMapper.GetByopenid(openid);
        //如果是新用户,自动完成注册
        if(user==null){
            //给这个新用户赋值
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;
    }

    private HashMap<String, String> getStringStringHashMap(UserLoginDTO userLoginDTO) {
        HashMap<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        return map;
    }
}
Mapper层及注解:
package com.sky.mapper;

import com.sky.entity.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

@Mapper
public interface UserMapper {


    /**
     * 查询当前用户是否为新用户
     * @param openid
     */
    @Select("select * from sky_take_out.user where openid = #{openid}")
    User GetByopenid(String openid);


    /**
     * 添加用户
     * @param user
     */
    void insert(User user);
}
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.sky.mapper.UserMapper">
    <insert id="insert" useGeneratedKeys="true" keyProperty="id">
        insert into sky_take_out.user(openid, name, phone, sex, id_number, avatar, create_time)
            value (#{openid},#{name},#{phone},#{sex},#{idNumber},#{avatar},#{createTime})
    </insert>
</mapper>

5:注册拦截器