微信授权登录移动应用-java版本

第一步：先去微信开放平台进行创建移动应用：微信开放平台 如下图：

第二步：新建一个yml资源文件（application-loc.yml）名称可以自己改，如下图：
application-loc.yml内容：

## 微信用户授权信息
wxUserInfo:
  appid: *******
  appSecret : *******
  ## 获取accessToken（https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code）
  getAccessToken: https://api.weixin.qq.com/sns/oauth2/access_token
  ## 校验accoessToken是否有效（https://api.weixin.qq.com/sns/auth?access_token=ACCESS_TOKEN&openid=OPENID）
  authToken: https://api.weixin.qq.com/sns/auth
  ## 刷新accessToken（https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=APPID&grant_type=refresh_token&refresh_token=REFRESH_TOKEN）
  refreshAccessToken: https://api.weixin.qq.com/sns/oauth2/refresh_token
  ## 获取用户信息（https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID）
  getUserinfo: https://api.weixin.qq.com/sns/userinfo

第三步：controller代码，code是前端传过来的哈

 /**
     * @description: 授权微信登录
     * @param code 授权code
     * @return: 返回用户信息
     */
    @Login(false)
    @ApiOperation("授权微信登录")
    @GetMapping("/weChatAuthorizateInfo")
    public ResultVO<WeChatInfoDto> weChatAuthorizateInfo(@ApiParam(name = "code", value = "微信授权code") @RequestParam(name = "code") String code) {
        if (StringUtils.isEmpty(code)) {
            return ResultVO.error("授权code不能为空！");
        }
        return loginService.weChatAuthorizateInfo(code);
    }

第四步：server代码

 // 微信appid
    @Value("${wxUserInfo.appid}")
    private String appid;

    // 微信appSecret
    @Value("${wxUserInfo.appSecret}")
    private String appSecret;

    // 获取accessToken
    @Value("${wxUserInfo.getAccessToken}")
    private String getAccessToken;

    // 校验accoessToken是否有效
    @Value("${wxUserInfo.authToken}")
    private String authToken;

    // 刷新accessToken
    @Value("${wxUserInfo.refreshAccessToken}")
    private String refreshAccessToken;

    // 获取用户信息
    @Value("${wxUserInfo.getUserinfo}")
    private String getUserinfo;
    
   /**
    * @description: 授权微信登录
    * @param code 授权code
    * @return:
    */
    @Override
    public ResultVO<WeChatInfoDto> weChatAuthorizateInfo(String code) {
        // 获取accessToken
        String getAccessTokenParam = "appid=" + appid + "&secret=" + appSecret + "&code=" + code + "&grant_type=authorization_code";
        JSONObject getAccessTokenRes = HttpUtil.sendGet(getAccessToken, getAccessTokenParam);
        if (getAccessTokenRes.containsKey("errcode")) {
            log.error("获取微信accessToken失败！" + getAccessTokenRes.getString("errmsg"));
            return ResultVO.error("授权失败！");
        }

        // 校验accessToken是否有效
        String access_token = getAccessTokenRes.getString("access_token");
        String openid = getAccessTokenRes.getString("openid");
        String validateAccessTokenParam = "access_token=" + access_token + "&openid=" + openid;
        JSONObject authTokenRes = HttpUtil.sendGet(authToken, validateAccessTokenParam);
        if (authTokenRes.getInteger("errcode").intValue() != 0) {
            // 刷新token
            String refresh_token = getAccessTokenRes.getString("refresh_token");
            String refreshTokenParam = "appid=" + appid + "&grant_type=refresh_token&refresh_token=" + refresh_token;
            JSONObject refreshTokenRes = HttpUtil.sendGet(refreshAccessToken, refreshTokenParam);
            if (refreshTokenRes.containsKey("errcode")) {
                log.error("刷新微信accessToken失败！" + refreshTokenRes.getString("errmsg"));
                return ResultVO.error("授权失败！");
            }
            access_token = refreshTokenRes.getString("access_token");
            openid = refreshTokenRes.getString("openid");
        }

        // 获取授权用户信息
        String getUserinfoParam = "access_token=" + access_token + "&openid=" + openid+"&lang=zh_CN";
        JSONObject getUserinfoRes = HttpUtil.sendGetEncode(getUserinfo, getUserinfoParam);
        if (getUserinfoRes.containsKey("errcode")) {
            log.error("获取微信accessToken失败！" + getAccessTokenRes.getString("errmsg"));
            return ResultVO.error("获取授权用户信息失败！");
        }

        // 返回授权结果
        WeChatInfoDto weChatInfoDto = JSON.parseObject(getUserinfoRes.toJSONString(), WeChatInfoDto.class);
        log.info("微信授权用户信息：" + JSONObject.toJSONString(weChatInfoDto));
        return ResultVO.success("授权成功！", weChatInfoDto);
    }

ResultVO返回类

package com.sport.sportcloudmarathonh5.vo;

import java.io.Serializable;

/**
 * @author zdj
 * @version 1.0
 * @date 2021-10-31 19:42:33
 */
public class ResultVO<T> implements Serializable {

    private Integer code;

    private String message;

    private T data;

    private static <T> ResultVO<T> getInstance() {
        return new ResultVO<T>();
    }

    public static <T> ResultVO<T> token() {
        return response(300, "请登录", null);
    }

    public static <T> ResultVO<T> success() {
        return response(200, "success", null);
    }

    public static <T> ResultVO<T> success(T data) {
        return response(200, "success", data);
    }

    public static <T> ResultVO<T> success(String message, T data) {
        return response(200, message, data);
    }

    public static <T> ResultVO<T> error() {
        return response(500, "服务器异常", null);
    }

    public static <T> ResultVO<T> error(String message) {
        return response(500, message, null);
    }

    public static <T> ResultVO<T> error(String message, T data) {
        return response(500, message, data);
    }

    public static <T> ResultVO<T> exp() {
        return response(500, "服务器异常", null);
    }

    public static <T> ResultVO<T> response(Integer code, String message, T data) {
        ResultVO<T> instance = getInstance();
        instance.setCode(code);
        instance.setMessage(message);
        instance.setData(data);

        return instance;
    }

    public Integer getCode() {
        return code;
    }

    public ResultVO<T> setCode(Integer code) {
        this.code = code;
        return this;
    }

    public String getMessage() {
        return message;
    }

    public ResultVO<T> setMessage(String message) {
        this.message = message;
        return this;
    }

    public T getData() {
        return data;
    }

    public ResultVO<T> setData(T data) {
        this.data = data;
        return this;
    }
}