JAVA获取POST请求的请求头信息

最新推荐文章于 2025-06-29 11:18:39 发布

Vc_004

最新推荐文章于 2025-06-29 11:18:39 发布

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分类专栏：知识点文章标签： JAVA

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本文介绍了如何使用Java从HTTP Post请求中读取并解析请求体的内容及请求头信息。通过提供的方法可以轻松地将请求体转换为字节数组或字符串，并展示了如何收集所有请求头数据。

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	 public static byte[] getRequestPostBytes(HttpServletRequest request)
	            throws IOException {
	        int contentLength = request.getContentLength();
	        if(contentLength<0){
	            return null;
	        }
	        byte buffer[] = new byte[contentLength];
	        for (int i = 0; i < contentLength;) {

	            int readlen = request.getInputStream().read(buffer, i,
	                    contentLength - i);
	            if (readlen == -1) {
	                break;
	            }
	            i += readlen;
	        }
	        return buffer;
	    }

	    /**      
	     * 描述:获取 post 请求内容
	     * <pre>
	     * 举例：
	     * </pre>
	     * @param request
	     * @return
	     * @throws IOException      
	     */
	    public static String getRequestPostStr(HttpServletRequest request)
	            throws IOException {
	        byte buffer[] = getRequestPostBytes(request);
	        String charEncoding = request.getCharacterEncoding();
	        if (charEncoding == null) {
	            charEncoding = "UTF-8";
	        }
	        return new String(buffer, charEncoding);
	    }

	    /**      
	     * 描述:获取请求头内容    
	     */
		private String getHeadersInfo(HttpServletRequest request) {
	        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);
	        }
	        
	        String result="";
	        for (String key : map.keySet()) {  
	        	   //System.out.println("key= "+ key + " and value= " + map.get(key));  
	        	result = result + "key= "+ key + " and value= " + map.get(key)+"\n";
	        	  }  
	        return result;
	      }