java相关：SpringMvc微信支付回调示例代码

发布于 2020-7-14|

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微信一直是一个比较热门的词汇，今天

介绍大家都知道微信支付的回调链接要求不能跟参数，但又要接收返回的xml数据。我开始使用@RequestBody注解在参数上，希望能获取xml数据，测试失败。最后使用HttpServletRequest去获取数据成功了。示例代码

```java

@RequestMapping("/weixinpay/callback")

public String callBack(HttpServletRequest request){

InputStream is = request.getInputStream();

String xml = StreamUtil.inputStream2String(is, "UTF-8")

/**

* 后面把xml转成Map根据数据作逻辑处理

*/

}

```

```java

/**

* InputStream流转换成String字符串

* @param inStream InputStream流

* @param encoding 编码格式

* @return String字符串

*/

public static String inputStream2String(InputStream inStream, String encoding){

String result = null;

try {

if(inStream != null){

ByteArrayOutputStream outStream = new ByteArrayOutputStream();

byte[] tempBytes = new byte[_buffer_size];

int count = -1;

while((count = inStream.read(tempBytes, 0, _buffer_size)) != -1){

outStream.write(tempBytes, 0, count);

}

tempBytes = null;

outStream.flush();

result = new String(outStream.toByteArray(), encoding);

}

} catch (Exception e) {

result = null;

}

return result;

}

```