获取HttpServletRequest请求Body中的内容

在实际开发过程中，经常需要从 HttpServletRequest 中读取HTTP请求的body内容，俗话说的好”好记性不如烂笔头“，特在此将其读取方法记录一下。

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import javax.servlet.ServletInputStream; import javax.servlet.http.HttpServletRequest; public class HttpServletRequestReader { // 字符串读取 // 方法一
    public static String ReadAsChars(HttpServletRequest request) { BufferedReader br = null; StringBuilder sb = new StringBuilder(""); try { br = request.getReader(); String str; while ((str = br.readLine()) != null) { sb.append(str); } br.close(); } catch (IOException e) { e.printStackTrace(); } finally { if (null != br) { try { br.close(); } catch (IOException e) { e.printStackTrace(); } } } return sb.toString(); } // 方法二
    public static void ReadAsChars2(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(); } } } } // 二进制读取
    public static byte[] readAsBytes(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(); } } } return buffer; } }

 

注意：HttpServletRequest 请求中的 body 内容仅能调用 request.getInputStream()， request.getReader()和request.getParameter("key") 方法读取一次，重复读取会报 java.io.IOException: Stream closed 异常。

转自：https://blog.csdn.net/pengjunlee/article/details/79416687