最開始亂碼，用String接受的微信返回值，發現不能用字符串接受，用輸入流轉字節，再轉base64傳給前端
public String xyhkQrCode(HttpServletRequest request, HttpServletResponse response, String path, String scene) {
PKWXConfig pkwxConfig = new PKWXConfig();
String token = getToken(pkwxConfig.getStuAppID(), pkwxConfig.getStuKey());
return genQrCode(token,path,scene);
}
private String genQrCode(String token,String path,String scene){
String url = WechatUtil.WX_ACODE_UN_LIMIT.replace("ACCESS_TOKEN", token);
JSONObject paramJson=new JSONObject();
paramJson.put("page",path);
paramJson.put("scene",scene);
//返回值不能使用String接受
CloseableHttpClient httpClient = null;
CloseableHttpResponse httpResponse = null;
//創建httpClient連接對象
httpClient = HttpClients.createDefault();
//創建post請求連接對象
HttpPost httpPost = new HttpPost(url);
//創建連接請求對象,並設置連接參數
RequestConfig requestConfig = RequestConfig.custom()
.setConnectTimeout(15000) //連接服務區主機超時時間
.setConnectionRequestTimeout(60000) //連接請求超時時間
.setSocketTimeout(60000).build(); //設置讀取響應數據超時時間
//爲httppost請求設置參數
httpPost.setConfig(requestConfig);
//將上傳參數放到entity屬性中
httpPost.setEntity(new StringEntity(JSON.toJSONString(paramJson), "UTF-8"));
//添加頭信息
httpPost.addHeader("Content-type", "text/xml");
String result = "";
try {
//發送請求
httpResponse = httpClient.execute(httpPost);
//從相應對象中獲取返回內容
HttpEntity entity = httpResponse.getEntity();
InputStream content = entity.getContent();
byte[] bytes = InputStreamToByte(content);
result = Base64.encodeBase64String(bytes);
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
/**
* 輸入流轉字節流
* */
private byte[] InputStreamToByte(InputStream in) throws IOException {
ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
byte[] buffer=new byte[1024];
int ch;
while ((ch = in.read(buffer)) != -1) {
bytestream.write(buffer,0,ch);
}
byte data[] = bytestream.toByteArray();
bytestream.close();
return data;
}
