微信支付回调签名失败Tomcat编码问题解决

在IDEA环境内嵌Tomcat8正常，在Windows部署的Tomcat8不正常，返回签名错误，原因是tomcat默认的编码使用ISO-8859-1的编码解析器，只要指定HttpServletRequest的读取编码即可解决乱码问题

ServletInputStream inStream = request.getInputStream();

String resp = getStrFromInsByCode(inStream, "utf-8");

/**
 *
 * @param is 输入流
 * @param code 指定读取编码
 * @return
 */
public static String getStrFromInsByCode(InputStream is, String code) {
    StringBuilder builder = new StringBuilder();
    BufferedReader reader = null;


    try {
        reader = new BufferedReader(new InputStreamReader(is, code));
        String line;
        while ((line = reader.readLine()) != null) {
            builder.append(line + "\n");
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return builder.toString();
}