小程序授权登录,前后端代码,Java版本
时间: 2023-05-31 18:05:42 浏览: 53
前端代码:
1. 引入微信登录组件
```html
<view class="login-btn" bindtap="login">
<button open-type="getUserInfo">微信登录</button>
</view>
```
2. 实现登录方法
```javascript
login: function() {
wx.login({
success: res => {
if (res.code) {
// 将code发送给后端
wx.request({
url: 'http://localhost:8080/login',
data: {
code: res.code
},
success: res => {
// 登录成功,将返回的token存储到本地
wx.setStorageSync('token', res.data.token);
// 跳转到首页
wx.switchTab({
url: '/pages/index/index',
})
}
})
}
}
})
}
```
后端代码:
1. 接收前端发送的code,并向微信服务器发送请求获取用户的openid和session_key
```java
@RequestMapping("/login")
public String login(String code) {
String url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + APP_ID + "&secret=" + APP_SECRET + "&js_code=" + code + "&grant_type=authorization_code";
String response = restTemplate.getForObject(url, String.class);
JSONObject jsonObject = JSONObject.parseObject(response);
String openid = jsonObject.getString("openid");
String sessionKey = jsonObject.getString("session_key");
// 生成token并返回给前端
String token = JWT.create().withAudience(openid).sign(Algorithm.HMAC256(sessionKey));
return "{\"token\":\"" + token + "\"}";
}
```
2. 验证token是否有效
```java
@RequestMapping("/verifyToken")
public boolean verifyToken(String token) {
try {
JWTVerifier verifier = JWT.require(Algorithm.HMAC256(sessionKey)).build();
DecodedJWT jwt = verifier.verify(token);
return true;
} catch (Exception e) {
return false;
}
}
```