在绑定用户微信时，需要从微信获取用户信息，此处容易出现乱码。

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);

将 String result = method.getResponseBodyAsString();

换成 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”)

将 method.getResponseBody() 返回的原生字节用指定的 utf-8 编码，编码成String。因为微信的返回值就是采用的utf-8编码。

运行结果：

没有乱码出现。

https://www.cnblogs.com/digdeep/category/639150.html