获取request请求中Json格式的数据

清疚 2022-05-14 09:08 185阅读 0赞

最近在项目中碰到需要获取post请求中的Json格式的参数, 查阅无数博客 , 然而都以无奈告终.  
一般我们获取post请求参数用注解 @RequestBody 就可以获得.  
然而这次项目中 我在拦截器中获取post 请求参数 , 就用不上 注解@RequestBody.  
最后查阅各大资料 , 终于发现了一篇让我 泪流满面的文章 .上代码:

import java.io.IOException;
    
    import javax.servlet.http.HttpServletRequest;
    import com.alibaba.fastjson.JSONObject;
    
    /** * 获取请求Json数据转换类 */
    public class GetRequestJsonUtils { 
    
        public static JSONObject getRequestJsonObject(HttpServletRequest request) throws IOException {
            String json = getRequestJsonString(request);
            return JSONObject.parseObject(json);
        }
        /*** * 获取 request 中 json 字符串的内容 * * @param request * @return : <code>byte[]</code> * @throws IOException */
        public static String getRequestJsonString(HttpServletRequest request)
                throws IOException {
            String submitMehtod = request.getMethod();
            // GET
            if (submitMehtod.equals("GET")) {
              return new String(request.getQueryString().getBytes("iso-8859-1"),"utf-8").replaceAll("%22", "\"");
                // POST
            } else {
                return getRequestPostStr(request);
            }
        }
         /* @param request * @return * @throws IOException */
        public static byte[] getRequestPostBytes(HttpServletRequest request)
                throws IOException {
            int contentLength = request.getContentLength();
            if(contentLength<0){
                return null;
            }
            byte buffer[] = new byte[contentLength];
            for (int i = 0; i < contentLength;) 
            {
                int readlen = request.getInputStream().read(buffer, i,
                        contentLength - i);
                if (readlen == -1) {
                    break;
                }
                i += readlen;
            }
            return buffer;
        }
        /** * 描述:获取 post 请求内容 * <pre> * 举例 * </pre> * @param request * @return * @throws IOException */
        public static String getRequestPostStr(HttpServletRequest request)
                throws IOException {
            byte buffer[] = getRequestPostBytes(request);
            String charEncoding = request.getCharacterEncoding();
            if (charEncoding == null) {
                charEncoding = "UTF-8";
            }
            return new String(buffer, charEncoding);
        }
    }

就可以获得Json格式的参数啦!  
原文地址:  
[http://blog.csdn.net/tengdazhang770960436/article/details/50149061][http_blog.csdn.net_tengdazhang770960436_article_details_50149061]

[http_blog.csdn.net_tengdazhang770960436_article_details_50149061]: http://blog.csdn.net/tengdazhang770960436/article/details/50149061