接收ajax使用post方法传的json

小灰灰 2022-02-19 03:59 341阅读 0赞

servlet部分

protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    		
    		/*ServletInputStream inputStream = req.getInputStream();
    		System.out.println(inputStream);
    		BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));*/
    		
    		/*用到io流的方式来获取body中的内容*/
    		BufferedReader reader = req.getReader();
    		/*读取内容*/
    		StringBuffer buffer = new StringBuffer();
    		String string;
    		while ((string = reader.readLine())!=null) {
    			buffer.append(string);
    		}
    		System.out.println("post请求body中的内容："+buffer);
    		/*内容转换*/
    		JSONObject parseObject = JSONObject.parseObject(buffer.toString());
    		User user = JSONObject.toJavaObject(parseObject, User.class);
    		String jsonString = JSONObject.toJSONString(user);
    		/*返回json*/
    		resp.setContentType("application/json;charset=utf-8");//不加的话，前端识别不出来
    		resp.getWriter().println(jsonString);
    	}

ajax部分