关于request.getInputStream()接参流程

spring接到浏览器传来的post请求 所传进来的参数都在request里

 @RequestMapping(value = PROXY_URL, method = RequestMethod.POST, produces = PRODUCES)
    public Object proxy(final HttpServletRequest request, final HttpServletResponse response) {
　　　　　　String json = "";
                json = new String(readInputStream(request.getInputStream()), "UTF-8");  

    }

此时debug查看request.getInputStream()的值是全部请求信息 但是并非我们想要是参数

 

 所以我们要对结果解析

readInputSream()是解析方法

    public static byte[] readInputStream(InputStream inStream) throws Exception {
        ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        boolean var3 = false;

        int len;
        while((len = inStream.read(buffer)) != -1) {
            outSteam.write(buffer, 0, len);
        }

        outSteam.close();
        inStream.close();
        return outSteam.toByteArray();
    }

inStream.read(buffer)读取数据赋值给buffer

 

outSteam的结果就是我们想要的数据了

注意 这里的json格式的数据是前端定义好传进来的 和后台对io流解析无关