java通过微信授权获取用户信息

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首先准备好常量类,当然也可以写到配置文件里

/** *  * 功能描述: 公用封装方法 <br/> * date: 2017-7-24 下午5:18:58 <br/> * lk */public interface Constant {    // 凭证获取（GET）    public final static String TOKEN_URL = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";    // 用户同意授权,获取code    public final static String WX_OAUTH_URL = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=APPID&redirect_uri=REDIRECT_URI&response_type=code&scope=SCOPE&state=STATE#wechat_redirect";        // 用户同意授权,回调url    public final static String WX_REDIRECT_URL = "回调url";        // 拉去用户信息url    public final static String WX_SNSAPI_URL = "https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN";        //微信openId    public final static String WX_OPEN_ID = "公众好id";        //微信appSecret    public final static String WX_APP_SECRET = "appSecret";}

然后需要几个工具类

/** *  * 功能描述: 公用封装方法 <br/> * date: 2017-7-24 下午5:18:58 <br/> * lk */public class CommonMethod {    /**     * 获取接口访问凭证     *      * @param appid 凭证     * @param appsecret 密钥     * @return     */    public static Token getToken(String appid, String appsecret, String code) {        Token token = null;        String requestUrl = Constant.TOKEN_URL.replace("APPID", appid).replace("SECRET", appsecret).replace("CODE", code);        // 发起GET请求获取凭证        net.sf.json.JSONObject jsonObject = httpsRequest(requestUrl, "GET", null);        if (null != jsonObject) {            try {                token = new Token();                token.setAccessToken(jsonObject.getString("access_token"));                token.setExpiresIn(jsonObject.getInt("expires_in"));                token.setOpenId(jsonObject.getString("openid"));            } catch (JSONException e) {                token = null;                // 获取token失败                System.out.println("获取token失败");                e.printStackTrace();                //log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));            }        }        return token;    }        /**     * URL编码（utf-8）     *      * @param source     * @return     */    public static String urlEncodeUTF8(String source) {        String result = source;        try {            result = java.net.URLEncoder.encode(source, "utf-8");        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }        return result;    }/**     * 发送https请求     *      * @param requestUrl 请求地址     * @param requestMethod 请求方式（GET、POST）     * @param outputStr 提交的数据     * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)     */    public static net.sf.json.JSONObject httpsRequest(String requestUrl, String requestMethod, String outputStr) {    net.sf.json.JSONObject jsonObject = null;        try {            // 创建SSLContext对象，并使用我们指定的信任管理器初始化            TrustManager[] tm = { new MyX509TrustManager() };            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");            sslContext.init(null, tm, new java.security.SecureRandom());            // 从上述SSLContext对象中得到SSLSocketFactory对象            SSLSocketFactory ssf = sslContext.getSocketFactory();            URL url = new URL(requestUrl);            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();            conn.setSSLSocketFactory(ssf);                        conn.setDoOutput(true);            conn.setDoInput(true);            conn.setUseCaches(false);            // 设置请求方式（GET/POST）            conn.setRequestMethod(requestMethod);            // 当outputStr不为null时向输出流写数据            if (null != outputStr) {                OutputStream outputStream = conn.getOutputStream();                // 注意编码格式                outputStream.write(outputStr.getBytes("UTF-8"));                outputStream.close();            }            // 从输入流读取返回内容            InputStream inputStream = conn.getInputStream();            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);            String str = null;            StringBuffer buffer = new StringBuffer();            while ((str = bufferedReader.readLine()) != null) {                buffer.append(str);            }            // 释放资源            bufferedReader.close();            inputStreamReader.close();            inputStream.close();            inputStream = null;            conn.disconnect();            jsonObject = net.sf.json.JSONObject.fromObject(buffer.toString());        } catch (ConnectException ce) {        System.out.println("连接超时：{}");        ce.printStackTrace();        } catch (Exception e) {        System.out.println("https请求异常：{}");        e.printStackTrace();        }        return jsonObject;    }}

Token类

public class Token {// 接口访问凭证    private String accessToken;    // 凭证有效期，单位：秒    private int expiresIn;        private String openId;    public String getAccessToken() {        return accessToken;    }    public void setAccessToken(String accessToken) {        this.accessToken = accessToken;    }    public int getExpiresIn() {        return expiresIn;    }    public void setExpiresIn(int expiresIn) {        this.expiresIn = expiresIn;    }public String getOpenId() {return openId;}public void setOpenId(String openId) {this.openId = openId;}}

下面写下调用流程

第一步请求获取code,原本想在代码中直接跳转的但未成功,就决定使用返回一个页面在页面中进行跳转

@RequestMapping("/index")public String home(HttpServletRequest request) {// 请求获取用户授权String requestUrl = Constant.WX_OAUTH_URL.replace("APPID", Constant.WX_OPEN_ID).replace("REDIRECT_URI",CommonMethod.urlEncodeUTF8(Constant.WX_REDIRECT_URL)).replace("SCOPE", "snsapi_base").replace("STATE", "123");request.setAttribute("url", requestUrl);return "url";}

现在是返回的jsp代码

 <body onload="redirectUrl('${url }')">  </body>  <script type="text/javascript">  function redirectUrl(url){  window.location.href=url;  }  </script>

下面是接收回调的action

@RequestMapping("/showIndex")public String getIndex(HttpServletRequest request) {String code = request.getParameter("code");// 获取TOKENToken accessToken = CommonMethod.getToken(Constant.WX_OPEN_ID,Constant.WX_APP_SECRET, code);if (!OAuth(request, accessToken.getAccessToken(),accessToken.getOpenId())) {//此处编写业务逻辑return "error";}//此处编写业务逻辑
}public boolean OAuth(HttpServletRequest request, String accessToken,String openId) {TBaseMember member = null;// 拼接请求地址String requestUrl = Constant.WX_SNSAPI_URL.replace("ACCESS_TOKEN",accessToken).replace("OPENID", openId);// 获取用户信息JSONObject jsonObject = CommonMethod.httpsRequest(requestUrl, "GET",null);if (null != jsonObject) {try {// 根据openid查询判断用户是否存在TBaseMember tbm = memberService.selectMemberByOpenId(jsonObject.getString("openid"));if (null != tbm) {request.getSession().setAttribute("member", tbm);} else {member = new TBaseMember();member.setmId(AutoGenerationCode.getUUId());member.setmState("01");member.setIsValid("01");member.setCreateDate(new Date());member.setmOpenid(jsonObject.getString("openid"));member.setExt2(jsonObject.getString("nickname"));member.setmSex("0" + jsonObject.getInt("sex"));member.setExt1(jsonObject.getString("headimgurl"));memberService.insertSelective(member);request.getSession().setAttribute("member", member);}return true;} catch (Exception e) {e.printStackTrace();/* * if ("0".equals(member.getExt4())) { * System.out.println("用户{}已取消关注"); } else { int errorCode = * jsonObject.getInt("errcode"); String errorMsg = * jsonObject.getString("errmsg"); System.out.println("获取用户信息失败" * + errorMsg); } */return false;}}return false;}

至此用户信息就保存到数据库和session中

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