springMVC 获取请求参数

获取 url参数

 

获取 body参数(多种数据类型)

通过request.getInputStream()的方式来获取body信息


//方式一： IO流 通过流的方式只能调用一次，流关闭了就读取不到了(水流)
public static void getBodyMsg(HttpServletRequest request)
    {
        InputStream is = null;
        try
        {
            is = request.getInputStream();
            StringBuilder sb = new StringBuilder();
            byte[] b = new byte[4096];
            for (int n; (n = is.read(b)) != -1;)
            {
                sb.append(new String(b, 0, n));
            }
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            if (null != is)
            {
                try
                {
                    is.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }
     }
//方式二：二进制的方式
public static byte[] getBodyBytes(HttpServletRequest request)
    {
 
        int len = request.getContentLength();
        byte[] buffer = new byte[len];
        ServletInputStream in = null;
 
        try
        {
            in = request.getInputStream();
            in.read(buffer, 0, len);
            in.close();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            if (null != in)
            {
                try
                {
                    in.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }
        //也可以直接将byte[]转换为字符串返回
        return buffer;
    }

 

获取 表单上传文件（也是Body,form-data类型）

基于apache的fileuoload来实现，和基于springmvc 的MultipartFile(内部也是调用fileuoload)