微信小程序

HttpClient

即可以在java程序中发送http请求

Get

@SpringBootTest
public class HttpClientTest {
    @Test
    public void test() throws IOException {
        //创建httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();

        //创建请求对象
        HttpGet get = new HttpGet("http://localhost:8080/user/shop/status");

        //发送请求，接收响应结果
        CloseableHttpResponse execute = httpClient.execute(get);

        //获取服务端返回的状态码
        int statusCode = execute.getStatusLine().getStatusCode();
        System.out.println("服务端返回的状态码为："+ statusCode);

        HttpEntity entity = execute.getEntity();
        String content = entity.getContent().toString();
        System.out.println("服务端返回的内容为："+ content);

        //关闭资源
        execute.close();
        httpClient.close();
    }
}

Post

@Test
public void testPost() throws IOException {
    //创建httpclient对象
    CloseableHttpClient httpClient = HttpClients.createDefault();
    //创建请求对象
    HttpPost post = new HttpPost("http://localhost:8080/admin/employee/login");

    JSONObject json = new JSONObject();
    json.put("username", "admin");
    json.put("password", "admin");
    StringEntity entity = new StringEntity(json.toJSONString());
    //指定请求编码方式
    entity.setContentEncoding("utf-8");
    //数据格式
    entity.setContentType("application/json");
    post.setEntity(entity);

    //发送请求
    CloseableHttpResponse execute = httpClient.execute(post);
    System.out.println("服务端返回的状态码为："+ execute.getStatusLine().getStatusCode());

    HttpEntity entity1 = execute.getEntity();
    String body = EntityUtils.toString(entity1);
    System.out.println("服务端返回的内容为："+ body);

    //关闭资源
    execute.close();
    httpClient.close();
}

微信小程序

链接：https://mp.weixin.qq.com/wxopen/waregister?action=step1

按照视频下载完软件后就是这个

在设置中把不校验合法域名选上

介绍

微信登录

controller

@RestController
@Slf4j
@RequestMapping("/user/user")
public class UserController {

    @Autowired
    private UserService userService;

    @Autowired
    private JwtProperties jwtProperties;

    //微信登录
    @PostMapping("/login")
    public Result<UserLoginVO> login(@RequestBody UserLoginDTO userLoginDTO){
        log.info("微信登录，参数：{}", userLoginDTO);
        User user = userService.wxLogin(userLoginDTO);

        //为微信用户生成jwt令牌
        Map<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.USER_ID,user.getId());
        String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(), jwtProperties.getUserTtl(),claims);

        UserLoginVO userLoginVO = UserLoginVO.builder()
                .id(user.getId())
                .openid(user.getOpenid())
                .token(token)
                .build();
        return Result.success(userLoginVO);
    }
}

service

@Service
public class UserServiceImpl implements UserService {

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChat;

    @Autowired
    private UserMapper userMapper;


    //微信登录
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务，获取当前微信用户的openid
        Map<String, String> map = new HashMap();
        map.put("appid", weChat.getAppid());
        map.put("secret", weChat.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization_code");
        //发送get请求
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        //获取openid
        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");

        //判断openid是否为空，为空则抛出异常
        if (openid != null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //查询当前用户是否为新用户
        User user = userMapper.getByOpenid(openid);

        //如果是新用户，自动注册
        if (user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        //返回用户对象
        return user;
    }
}

mapper

<insert id="insert" useGeneratedKeys="true" keyProperty="id">
    insert into user (openid, name, phone, sex, id_number, avatar, create_time)
    values (#{openid}, #{name}, #{phone}, #{sex}, #{idNumber}, #{avatar}, #{createTime})
</insert>