controller層：

@RestController
@RequestMapping("wechat/login")
public class LoginController {
    @Resource
    WechatService wechatService;
    @Resource
    WechatUserService wechatUserService;

    /**
     * 登錄
     * @param code
     * @return
     * @throws Exception
     */
    @ApiOperation(value = "登錄", notes = "post請求，登錄")
    @PostMapping(value = "/getToken")
    public ApiResponseBody login(@RequestParam("code") String code) throws Exception {

        return wechatService.getUserInfoMap(code);
    }

    /**
     * 獲取用戶信息
     * @param token
     * @return
     */
    @ApiOperation(value = "獲取用戶信息", httpMethod = "POST")
    @GetMapping(value = "/getUserDetailByToken")
    public ApiResponseBody getUserDetailByToken(@RequestHeader("token") String token) {

        return wechatUserService.getUserDetailByToken(token);
    }

    /**
     *獲取用戶手機(jī)號
     * @param
     * @return
     */
    @ApiOperation(value = "獲取用戶手機(jī)號", httpMethod = "POST")
    @PostMapping("/getPhoneNumber")
    public ApiResponseBody getPhoneNumber(HttpServletRequest request, @RequestParam("code") String code) {

        return wechatService.getPhoneNumber(code,request);
    }
}

service層：

public interface WechatService {
    ApiResponseBody getUserInfoMap(String code) throws Exception;

    ApiResponseBody getPhoneNumber(String code, HttpServletRequest request);
}

public interface WechatUserService {
    List<Map<String, Object>> getByOpenId(String openId);

    ApiResponseBody getUserDetailByToken(String token);
    
    void update(Map<String, Object> user);

    void saveUser(Map<String, Object> userMap);

    void saveDictId(List<Map<String, Object>> dictMapList);

    void savePhoneNumber(Map<String, Object> bodyMap);
}

serviceImpl層：

這里注意第一個接口JSONObject 導(dǎo)的是fastjson的包，獲取手機(jī)號那里用的是hutool的包

@Service
@Slf4j
public class WechatServiceImpl implements WechatService {

    @Resource
    private RedisTemplate redisTemplate;
    @Resource
    private WechatUserService wechatUserService;

    private static final String REQUEST_URL = "https://api.weixin.qq.com/sns/jscode2session";
    private static final String GRANT_TYPE = "authorization_code";
    private static final String APPID = "";
    private static final String SECRET = "";

  
    @Override
    @Transactional(rollbackFor = Exception.class)
    public ApiResponseBody getUserInfoMap(String code) throws Exception {
        JSONObject sessionKeyOpenId = getSessionKeyOrOpenId(code);
        Assert.isTrue(sessionKeyOpenId != null, "code解析錯誤");
 
        // 獲取openId && sessionKey && UnionID
        String openId = sessionKeyOpenId.getString("openid");
        Assert.isTrue(openId != null, "openId為空");
        String sessionKey = sessionKeyOpenId.getString("session_key");
        String unionID = sessionKeyOpenId.getString("UnionID");

        // 根據(jù)openid查詢用戶
        List<Map<String, Object>> user = wechatUserService.getByOpenId(openId);
        String tokenData = openId + sessionKey;
        String token = getToken(tokenData);
        List<Map<String, Object>> dictMapList = new ArrayList<>();
        Map<String, Object> userMap = new HashMap<>();
        userMap.put("openId", openId );
        userMap.put("token", token);
        userMap.put("unionId", unionID);
       

        //如果不存在用戶就去添加，存在就修改token
        if (user.size() == 0) {
            wechatUserService.saveUser(userMap);
        } else {
            wechatUserService.update(userMap);
        }
        return ApiResponseBody.defaultSuccess(token);
    }

    @Override
    public ApiResponseBody getPhoneNumber(String code, HttpServletRequest request) {
        // 1.請求微信接口服務(wù)，獲取accessToken
        cn.hutool.json.JSONObject accessTokenJson = WeChatUtil.getAccessToken(APPID, SECRET);
        String accessToken = accessTokenJson.get("access_token",String.class);
        // 2.請求微信接口服務(wù)，獲取用戶手機(jī)號信息
        cn.hutool.json.JSONObject phoneNumberJson = WeChatUtil.getPhoneNumber(code, accessToken);
        WeChatPhoneInfo phoneInfo = phoneNumberJson.get("phone_info", WeChatPhoneInfo.class);
        Map<String, Object> bodyMap = new HashMap<>();
        String token = request.getHeader("token");
        bodyMap.put("phoneNumber", phoneInfo.getPurePhoneNumber());
        bodyMap.put("token", token);
        wechatUserService.savePhoneNumber(bodyMap);

        return ApiResponseBody.defaultSuccess(phoneInfo.getPurePhoneNumber());
    }

    private JSONObject getSessionKeyOrOpenId(String code) throws Exception {
        Map<String, String> requestUrlParam = new HashMap<>();
        requestUrlParam.put("appid", APPID);
        requestUrlParam.put("secret", SECRET);
        requestUrlParam.put("js_code", code);
        // 默認(rèn)參數(shù)
        requestUrlParam.put("grant_type", GRANT_TYPE);
        // 發(fā)送post請求讀取調(diào)用微信接口獲取openid用戶唯一標(biāo)識
        String result = HttpClientUtil.doPost(REQUEST_URL, requestUrlParam);
        return JSON.parseObject(result);
    }

    /**
     * 這里的 token 使用 SHA-256哈希算法生成
     * @param data
     * @return
     * @throws NoSuchAlgorithmException
     */
    private static String getToken(String data) throws NoSuchAlgorithmException {
        MessageDigest digest = MessageDigest.getInstance("SHA-256");
        byte[] hash = digest.digest(data.getBytes());
        StringBuilder hexString = new StringBuilder();

        for (byte b : hash) {
            String hex = Integer.toHexString(0xff & b);
            if (hex.length() == 1) {
                hexString.append('0');
            }
            hexString.append(hex);
        }
        return hexString.toString();
    }

}

最后還有一個WechatUserServiceImpl，這個主要做的就是增刪改查的操作，所以這里就不展示了，前面說的很詳細(xì)，只要按照流程一步一步走，然后寫SQL就沒問題。

完結(jié)撒花? 歡迎評論區(qū)討論文章來源地址http://www.zghlxwxcb.cn/news/detail-855955.html

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