How to return a html page from the controller in spring boot in?

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Solution

Before I used @RestController notes, while @RestController the controller returns data rather than view into @Controller like (The following is the modified)

@Controller
public class WebController {

    @Autowired
    private WxService service;

    @Autowired
    private HttpServletRequest request;

    @Autowired
    private HttpServletResponse response;

    /**
     * 获取授权的用户信息
     * @return
     */
    @GetMapping("/usr")
    public String getUsr() {
        try {
            String code = request.getParameter("code");
            //获取accesstoken的地址
            String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";
            url = url.replace("APPID", "wx3da4b30dadc22ff7").replace("SECRET", "2e132b85894583981d8410043443b766").replace("CODE", code);
            String result = Util.get(url);
            //获取result里面的token
            JSONObject jsonObject = new JSONObject(result);
            String at = jsonObject.getString("access_token");
            String openId = jsonObject.getString("openid");
            //拉取用户基本信息
            url = "https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN";
            url = url.replace("ACCESS_TOKEN", at).replace("OPENID", openId);
            result = Util.get(url);
            JSONObject usr = new JSONObject(result);
            User user = new User(usr.getString("openid"), usr.getString("nickname"), Integer.parseInt(usr.getString("sex")), usr.getString("language"), usr.getString("city"), usr.getString("headimgurl"), usr.getString("privilege"));
            return "index";
        } catch (JSONException e) {
            e.printStackTrace();
            return null;
        }
    }
}