Java獲取request的內(nèi)容有哪些方法？動力節(jié)點小編來告訴大家。

1.get 和 post請求方式

(1)request.getParameterNames(); 獲取所有參數(shù)key后。遍歷request.getParameter(key)獲取value

(2)request.getParameterMap() 。直接包含參數(shù)key和value值，簡單方便

Map<String, String[]>maps = request.getParameterMap();
for (Map.Entry<String, String[]> entry : maps.entrySet()) {
  String cs = entry.getKey() + ":"+Arrays.toString(entry.getValue())+";";
}

2.獲取請求類型為request payload方式

這里就不介紹文件流的了，主要針對 后端采用@RequestBody方式的請求

這類數(shù)據(jù)通過以上2種方式是獲取不到的，它是存放在流里面，要通過getInputStream()或getReader()方式獲取

public String getRequestData(HttpServletRequest httpServletRequest){
  HttpServletRequestWrapper httpServletRequestWrapper = new HttpServletRequestWrapper(httpServletRequest);
  StringBuilder sb = new StringBuilder();
  BufferedReader reader = null;
  InputStreamReader inputStreamReader=null;
  ServletInputStream servletInputStream =null;
  try {
   servletInputStream = httpServletRequestWrapper.getInputStream();
   inputStreamReader=new InputStreamReader (servletInputStream, Charset.forName("UTF-8"));
   reader = new BufferedReader(inputStreamReader);
   String line = "";
   while ((line = reader.readLine()) != null) {
    sb.append(line);
   }
  } catch (IOException e) {
   return "";
  }finally {
   try {
    if(servletInputStream!=null){
     servletInputStream.close();
    }
    if(inputStreamReader!=null){
     inputStreamReader.close();
    }
    if(reader!=null){
     reader.close();
    }
   } catch (IOException e) {    
   }
  }
  return sb.toString ();
 }

需要注意的是getInputStream()這種獲取流的方式 只能用一次，如果多次調(diào)用 需要緩存起來，不然流的數(shù)據(jù)到不了Controller層，報400錯誤