springboot框架 后台获取微信小程序用户的openid
小程序端app.js中：
// 登录
wx.login({
success: res => { // 发送 res.code 到后台换取 openId, sessionKey, unionId
if (res.code) {
wx.request({
url: 'http://localhost:84/user/login',
method: 'POST',
data: {
code: res.code
},
header: {
'content-type': 'application/x-www-form-urlencoded'
},
success(res) {
console.log("openid:"+res.data.openid);
if (res.data.openid != "" || res.data.openid!=null){ // 登录成功
wx.setStorageSync("openid", res.data.openid);//将用户id保存到缓存中
wx.setStorageSync("session_key", res.data.session_key);//将session_key保存到缓存中
}else{ // 登录失败
// TODO 跳转到错误页面，要求用户重试
return false;
}
}
})
} else {
console.log('获取用户登录态失败！' + res.errMsg)
}
}
})java端：
@RestController
public class LoginController extends BaseController {
@Autowired
private SysUserMapper sysUserMapper;
@PostMapping("/user/login")
@ResponseBody
public String login(@RequestHeader("token") String token,@RequestParam("code") String code){
String appID = "wx8786*******41b1c";
String appSecret = "7ab8d23ec**********3070ecf71afcd";
String loginname = JwtUtil.getUsername(token);
Map<String,Object> map = new HashMap<String,Object>();
String result = HttpUtil.get("https://api.weixin.qq.com/sns/jscode2session?appid=" + appID + "&secret="
+ appSecret + "&js_code=" + code+ "&grant_type=authorization_code"
,map);
ObjectMapper mapper = new ObjectMapper();
OpenIdJson openIdJson = null;
try {
openIdJson = mapper.readValue(result, OpenIdJson.class);
} catch (IOException e) {
e.printStackTrace();
}
System.out.println(result.toString());
System.out.println(openIdJson.getOpenid());
SysUser sysUser = new SysUser();
sysUser.setOpenid(openIdJson.getOpenid());
sysUser.setLoginName(loginname);
sysUserMapper.updateUserByUsername(sysUser);
return result;
}
}上面的HttpUtil.get()方法引入了工具包
<!-- 调用Api工具类 --> <dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>4.1.0</version> </dependency>
OpenIdJson的实体类：
public class OpenIdJson {
private String openid;
private String session_key;
public String getOpenid() {
return openid;
}
public void setOpenid(String openid) {
this.openid = openid;
}
public String getSession_key() {
return session_key;
}
public void setSession_key(String session_key) {
this.session_key = session_key;
}
}
