打印 request 请求中的参数

@SuppressWarnings({"rawtypes"})
private void showParams(HttpServletRequest request) {
    Map<String, String> params = new HashMap<>();
    Enumeration paramNames = request.getParameterNames();
    while (paramNames.hasMoreElements()) {
        String paramName = (String) paramNames.nextElement();
        String[] paramValues = request.getParameterValues(paramName);
        if (paramValues.length == 1) {
            if (paramValues[0].length() != 0) {
                params.put(paramName, paramValues[0]);
            }
        }
    }
    Map<String, String> heads = new HashMap<>();
    Enumeration<String> enumeration = request.getHeaderNames();
    while (enumeration.hasMoreElements()) {
        String name = (String) enumeration.nextElement();
        String values = request.getHeader(name);
        heads.put(name, values);
    }

    log.info("request url:" + request.getRequestURL());
    log.info("request remoteAddr:" + request.getRemoteAddr());
    log.info("request method:" + request.getMethod());
    log.info("request header host:" + request.getHeader("Host"));
    log.info("request web contextpath:" + request.getContextPath());
    log.info("request heads:" + request.getContextPath());
    log.info("request queryString:" + request.getQueryString());
    log.info("request params:" + JSON.toJSONString(params));

}