java微信扫描公众号二维码实现登陆功能

java微信扫描公众号二维码实现登陆功能

前提条件：

1.微信公众平台为服务号，

2.服务号实现了账号绑定功能，即将open_id 与业务系统中的用户名有对应关系

具体实现原理：

1.用户访问业务系统登陆页时，调用二维码接口，获得二维码的ticketid,同时将sessionid，ticketid和二维码的seceneid保存

2.返回登陆页时，根据ticketid获得微信二维码

3.页面通过ajax发送请求，判断是否已经扫描成功。

4.公众平台服务监测到扫描事件，更新seceneid中扫描二维码的业务系统用户名

5.当ajax监测到扫描成功，并返回有业务系统用户名，即可做模拟登陆！

具体代码：

根据sceneID获取，获取ticketId， sceneId可以为sessionID,或者自定义的其他任何值，但必须保证不重复

注意：这里请求的type可以为临时二维码或永久二维码，具体区别可以参看微信公众平台的开发者文档。

public static String getSceneTicket(String type,String sceneId){

WxScene scene = new WxScene();

scene.setAction_name(type);

scene.setSceneId(Integer.parseInt(sceneId));

scene.setExpire_seconds(1800);

String jsonScene = JSONObject.fromObject(scene).toString();

String url = WeixinContents.qr_scene_ticket_url.replaceAll("ACCESS_TOKEN", getAccessToken(WeixinContents.appid,WeixinContents.appsecret).getToken());

System.out.println(jsonScene);

JSONObject jsonObject = httpRequest(url, "POST", jsonScene);

int result = 0;

String ticket = "";

if (null != jsonObject) {

if (jsonObject.containsKey("errcode")) {

result = jsonObject.getInt("errcode");

}else{

ticket = jsonObject.getString("ticket");

}

}

return ticket;

}

2.扫描二维码登陆的几个action

@ActionKey("/")

@ClearInterceptor(ClearLayer.ALL)

public void index() {

LoginUser u = (LoginUser)getSessionAttr("LoginUser");

setAttr("root", this.getRequest().getContextPath());

if(null==u){

setAttr("ticketId",wxTicket());

render("/WEB-INF/login.html");

}else{

redirect("/index");

}

}

private String wxTicket() {

int sceneId = Db.queryInt("select SEQ_WX_SCENE.Nextval from dual");

String ticketId = WeixinHttpUtils.getSceneTicket("QR_SCENE", sceneId+"");

setSessionAttr("ticketId",ticketId);

setSessionAttr("sessionId",this.getRequest().getSession().getId());

String sql = "insert into wx_scence_logon(id,sessionid,ticketid,SCENCE_ID) values(sys_guid(),?,?,?)";

Db.update(sql,this.getRequest().getSession().getId(),ticketId,sceneId);

return ticketId;

}

@ActionKey("/cxTicket")

@ClearInterceptor(ClearLayer.ALL)

public void cxTicket(){

String ticketId = getPara("ticketId");

String sessionid = getPara("sessionId");

int i=0;

while(i<10){

Record r = Db.findFirst("select id from wx_scence_logon l,wx_user u where u.open_id = l.open_id and l.ticketid = ? and l.sessionId = ?",ticketId,sessionid);

if(r!=null&&StringUtils.isNotEmpty(r.getStr("id"))){

setAttr("success","1");

setAttr("logonId",r.getStr("id"));

break;

}else{

setAttr("success","0");

try {

Thread.sleep(5000);

i++;

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

render(new JsonRender().forIE());

}

@ActionKey("/ticketLogon")

@ClearInterceptor(ClearLayer.ALL)

public void ticketLogon(){

String id = getPara("ticketId");

Record r = Db.findFirst("select user_id as username from wx_scence_logon l,wx_user u where u.open_id = l.open_id and l.id = ?",id);

if(r!=null&&StringUtils.isNotEmpty(r.getStr("username"))){

String username = r.getStr("username");

LoginUser user = LoginUser.dao.findFirst("select user_id,xm,department_id,departmentname,userpw from gy_user u where u.username = ? and u.userlohttp://ckstate = '1' ",username);

String permSql = "select distinct p.* from hr_user_role t,hr_role r,hr_role_perm m,hr_perms p where t.role_id = r.id and m.role_id = r.id and m.perm_id = p.id and user_id = ?";

List perms = Db.find(permSql,new Object[]{user.getStr("user_id")});

if(perms!=null&&perms.size()>0){

this.getSession().removeAttribute("USER_PERMS");

setSessionAttr("USER_PERMS",perms);

getRequest().getSession().setAttribute("LoginUser",user);

}

}

this.redirect("/main");

}

3. 登陆页面

二维码显示

定时查询扫描状态

function wxCxTikcet(){

$.getJSON("${root!}/cxTicket",{ticketId:"${ticketId}",sessionId:"${sessionId}"},function(data){

//alert(data.success=="1");

if(data.success=='1'){

_logon(data.logonId);

//window.location.href="${root!}/ticketLogon/" rel="external nofollow" +data.logonId;

}

});

}

var t_int = window.setInterval("wxCxTikcet()",5000);

4.公众平台代码

}else if(eventType.equalsIgnoreCase(MessageUtil.EVENT_TYPE_SCAN)){

String scene_id = eventKey;

if(Integer.parseInt(eventKey)==0){

respContent = "扫描参数出错！请刷新重试！";

}else{

respContent = getSceneContent(scene_id,fromUserName);

}

}

private static String getSceneContent(String sceneId,String fromUserName){

String sql ="select * from WX_SCENCE_LOGON where scence_id = ?";

Record r = Db.findFirst(sql,sceneId);

if(r!=null){

String updateSql = "update wx_scence_logon set open_id = ? where id = ?";

Db.update(updateSql,fromUserName,r.getStr("id"));

return "您已成功登陆***系统！";

}

}

说明，框架使用jfinal 1.5

大家可以参考专题：java二维码进行学习

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