diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/WxPayServiceApacheHttpImpl.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/WxPayServiceApacheHttpImpl.java
index dcd70b523..145582b7f 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/WxPayServiceApacheHttpImpl.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/WxPayServiceApacheHttpImpl.java
@@ -65,7 +65,7 @@ public byte[] postForBytes(String url, String requestStr, boolean useKey) throws
         httpPost.releaseConnection();
       }
     } catch (Exception e) {
-      this.logError( url, requestStr, e);
+      this.logError(url, requestStr, e);
       wxApiData.set(new WxPayApiData(url, requestStr, null, e.getMessage()));
       throw new WxPayException(e.getMessage(), e);
     }
@@ -105,8 +105,8 @@ public String postV3(String url, String requestStr) throws WxPayException {
   }
 
   private String requestV3(String url, String requestStr, HttpRequestBase httpRequestBase) throws WxPayException {
-    try (CloseableHttpClient httpClient = this.createApiV3HttpClient();
-         CloseableHttpResponse response = httpClient.execute(httpRequestBase)) {
+    CloseableHttpClient httpClient = this.createApiV3HttpClient();
+    try (CloseableHttpResponse response = httpClient.execute(httpRequestBase)) {
       //v3已经改为通过状态码判断200 204 成功
       int statusCode = response.getStatusLine().getStatusCode();
       //post方法有可能会没有返回值的情况
@@ -142,8 +142,8 @@ public String patchV3(String url, String requestStr) throws WxPayException {
   public String postV3WithWechatpaySerial(String url, String requestStr) throws WxPayException {
     HttpPost httpPost = this.createHttpPost(url, requestStr);
     this.configureRequest(httpPost);
-    try (CloseableHttpClient httpClient = this.createApiV3HttpClient();
-         CloseableHttpResponse response = httpClient.execute(httpPost)) {
+    CloseableHttpClient httpClient = this.createApiV3HttpClient();
+    try (CloseableHttpResponse response = httpClient.execute(httpPost)) {
       //v3已经改为通过状态码判断200 204 成功
       int statusCode = response.getStatusLine().getStatusCode();
       String responseString = "{}";
@@ -170,17 +170,14 @@ public String postV3WithWechatpaySerial(String url, String requestStr) throws Wx
 
   @Override
   public String postV3(String url, HttpPost httpPost) throws WxPayException {
-    String serialNumber = getWechatPaySerial(getConfig());
-    httpPost.addHeader(WECHAT_PAY_SERIAL, serialNumber);
     return this.requestV3(url, httpPost);
   }
 
   @Override
   public String requestV3(String url, HttpRequestBase httpRequest) throws WxPayException {
     this.configureRequest(httpRequest);
-
-    try (CloseableHttpClient httpClient = this.createApiV3HttpClient();
-         CloseableHttpResponse response = httpClient.execute(httpRequest)) {
+    CloseableHttpClient httpClient = this.createApiV3HttpClient();
+    try (CloseableHttpResponse response = httpClient.execute(httpRequest)) {
       //v3已经改为通过状态码判断200 204 成功
       int statusCode = response.getStatusLine().getStatusCode();
       //post方法有可能会没有返回值的情况
@@ -223,11 +220,9 @@ public String getV3WithWechatPaySerial(String url) throws WxPayException {
   @Override
   public InputStream downloadV3(String url) throws WxPayException {
     HttpGet httpGet = new WxPayV3DownloadHttpGet(url);
-    httpGet.addHeader(ACCEPT, ContentType.WILDCARD.getMimeType());
-    String serialNumber = getWechatPaySerial(getConfig());
-    httpGet.addHeader(WECHAT_PAY_SERIAL, serialNumber);
-    try (CloseableHttpClient httpClient = this.createApiV3HttpClient();
-         CloseableHttpResponse response = httpClient.execute(httpGet)) {
+    this.configureRequest(httpGet);
+    CloseableHttpClient httpClient = this.createApiV3HttpClient();
+    try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
       //v3已经改为通过状态码判断200 204 成功
       int statusCode = response.getStatusLine().getStatusCode();
       Header contentType = response.getFirstHeader(HttpHeaders.CONTENT_TYPE);
@@ -267,8 +262,11 @@ public String deleteV3(String url) throws WxPayException {
 
   private void configureRequest(HttpRequestBase request) {
     String serialNumber = getWechatPaySerial(getConfig());
+    String method = request.getMethod();
     request.addHeader(ACCEPT, APPLICATION_JSON);
-    request.addHeader(CONTENT_TYPE, APPLICATION_JSON);
+    if (!method.equals("POST")) {
+      request.addHeader(CONTENT_TYPE, APPLICATION_JSON);
+    }
     request.addHeader(WECHAT_PAY_SERIAL, serialNumber);
 
     request.setConfig(RequestConfig.custom()