java获取request的头信息

1.获取全部头信息：

 //get request headers
  private Map<String, String> getHeadersInfo() {
    Map<String, String> map = new HashMap<String, String>();
    Enumeration headerNames = request.getHeaderNames();
    while (headerNames.hasMoreElements()) {
        String key = (String) headerNames.nextElement();
        String value = request.getHeader(key);
        map.put(key, value);
    }
    return map;
  }

2.获取某个头信息：

private String getHeader(String headerName) {
        return request.getHeader(headerName);
    }

参考：http://www.yihaomen.com/article/java/459.htm

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