獲取微信用戶信息出現亂碼

在綁定用戶微信時，需要從微信獲取用戶信息，此處容易出現亂碼。

        JSONObject jo = this.getAccessTokenOpenid(code);

        StringBuilder sb = new StringBuilder("https://api.weixin.qq.com/sns/userinfo?access_token=");
        sb.append(jo.getString("access_token"));
        sb.append("&openid=").append(jo.getString("openid")).append("&lang=zh_CN");
        
        HttpMethod method = new PostMethod(sb.toString());
        HttpClient httpclient = new HttpClient();
        
        httpclient.executeMethod(method);        
        
        String result = new String(method.getResponseBody(), "utf-8");
        
//        String result = method.getResponseBodyAsString();

        System.out.println("getWeiXinUserInfo result = " + result);
        
        JSONObject userInfo = JSON.parseObject(result, JSONObject.class);

將 String result = method.getResponseBodyAsString();

換成 String result = new String(method.getResponseBody(), "utf-8");

即可。

method.getResponseBodyAsString()：

Returns the response body of the HTTP method, if any, as a String. If response body is not available or cannot be read, null is returned. The raw bytes in the body are converted to a String using the character encoding specified in the response's Content-Type header, or ISO-8859-1 if the response did not specify a character set.

Note that this method does not propagate I/O exceptions. If an error occurs while reading the body, null will be returned.

而：new String(method.getResponseBody(), "utf-8")

將 method.getResponseBody() 返回的原生字節用指定的 utf-8 編碼，編碼成String。因為微信的返回值就是采用的utf-8編碼。

運行結果：

沒有亂碼出現。