[Java] java实现二维码扫码授权登陆

/**
* 获取扫描登陆的二维码
* @param noncestr随机字符串
* @throws exception 
*/
@requestmapping(value = "user/getlogincode.json")
public void getlogincode(string noncestr,httpservletrequest request,httpservletresponse response) throws exception {
if(stringutil.isblank(noncestr)){
apidata(request, response,reqjson.error(commonerror.params_imperfect));
return;
}
//参数的有效性校验在拦截器里实现
int expirationtime=300; //时效5分钟
final string sessionid=request.getsession().getid();
string logincode=toolutils.getbase64(sessionid);
jedisutil.set(logincode, logincode, expirationtime);
map<string,object> map=new hashmap<>();
map.put("logincode", logincode);
map.put("expirationtime", expirationtime);
apidata(request, response, reqjson.ok(map));
}
/**
* 扫码确认登陆
* @param logincode
* @param request
* @param response
* @throws exception
*/
@requestmapping(value = "user/scanconfirmlogin.json")
@authorizationapi
public void scanconfirmlogin(@currenttoken final token token,string logincode,httpservletrequest request,httpservletresponse response) throws exception {
if(stringutil.isblank(logincode)){
apidata(request, response,reqjson.error(commonerror.params_imperfect));
return;
}
string userid=token.getuserid();
map<string,string> map=new hashmap<>();
string loginticket=jedisutil.get(logincode);
if(stringutil.isblank(loginticket)){
//二维码过期
apidata(request, response,reqjson.error(commonerror.two_dimensional_code_has_expired));
return;
}
userinfo userinfo = userinfobiz.getuser(new userinfo(userid)); 
if(userinfo==null){
apidata(request, response,reqjson.error(usererror.user_not_found));
return;
}
//将用户信息放在缓存中
map.put(baseconfig.access_token, token.getaccesstoken());
map.put("userid", userinfo.getuserid());
map.put("rongcloudtoken", userinfo.getrongcloudtoken());
map.put("identity", userinfo.getidentity());
jedisutil.setmap(logincode+"scanconfirmlogin", map, 300);
apidata(request, response, reqjson.ok(new object()));
}
/**
* 获取登陆状态
* @param logincode
* @param request
* @param response
* @throws exception
*/
@requestmapping(value = "user/getscanconfirmloginstatus.json")
public void getloginstatus(final string logincode,httpservletrequest request,httpservletresponse response) throws exception {
if(stringutil.isblank(logincode)){
apidata(request, response,reqjson.error(commonerror.params_imperfect));
return;
}
map<string,string> map= jedisutil.getmap(logincode+"scanconfirmlogin");
if(map==null){
apidata(request, response,reqjson.error(commonerror.authorization_has_expired));
return;
}
apidata(request, response, reqjson.ok(map));
}