java web获取请求体内容

java web中如何获取请求体内容呢？

我们知道请求方式分为两种：Get，Post

/***
	 * Compatible with GET and POST
	 * 
	 * @param request
	 * @return : <code>byte[]</code>
	 * @throws IOException
	 */
	public static byte[] getRequestQuery(HttpServletRequest request)
			throws IOException {
		String submitMehtod = request.getMethod();
		String queryString = null;

		if (submitMehtod.equals("GET")) {// GET
			queryString = request.getQueryString();
			String charEncoding = request.getCharacterEncoding();// charset
			if (charEncoding == null) {
				charEncoding = "UTF-8";
			}
			return queryString.getBytes(charEncoding);
		} else {// POST
			return getRequestPostBytes(request);
		}
	}

/***
	 * Get request query string, form method : post
	 * 
	 * @param request
	 * @return byte[]
	 * @throws IOException
	 */
	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;
	}
/***
	 * Get request query string, form method : post
	 * 
	 * @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);
	}

 说明：当请求方式为“Get”时，直接使用request.getQueryString()获取String

当请求方式为“Post”时，读取InputStream（request.getInputStream()）