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HttpServletRequest获取POST请求参数3种方法

客户端通过HTTP POST多参数字符串，比如（username=51gjie&pwd=123456789），HttpServletRequest 获取到POST的参数有如下3种方法：

request.getInputStream()

private static String getPostData(HttpServletRequest request) {
	StringBuffer data = new StringBuffer();
	String line = null;
	BufferedReader reader = null;
	try {
		reader = request.getReader();
		while (null != (line = reader.readLine()))
			data.append(line);
	} catch (IOException e) {
	} finally {
	}
	return data.toString();
}

获取到POST过来的信息（username=51gjie&pwd=123456789），后面直接解析字符串就好了。

request.getInputStream()执行一次后（可正常读取body数据），之后再执行就无效了。

@RequestBody

@RequestMapping(value = "/testurl", method = RequestMethod.POST)
@ResponseBody
public ServiceResult TestUrl(HttpServletRequest request,
	@RequestBody JSONObject jsonObject){
   String username =  jsonObject.get("username").toString();
   String pwd = jsonObject.get("pwd").toString();
}

@RequestBody 可以使用JSONObject， Map ，或者ObjectDTO绑定body。

@RequestParam

@RequestMapping(value = "/testurl", method = RequestMethod.POST)
@ResponseBody
public ServiceResult TestUrl(HttpServletRequest request,@RequestParam("username")String username,
@RequestParam("pwd")String pwd)  {
  String txt = username + pwd;
}