java遍历http请求request的所有参数实现方法

public void doGet(HttpServletRequest request, HttpServletResponse response)    throws ServletException, IOException { 

Map map = new HashMap();    Enumeration paramNames = request.getParameterNames();   while (paramNames.hasMoreElements()) {    String paramName = (String) paramNames.nextElement();     String[] paramValues = request.getParameterValues(paramName);    if (paramValues.length == 1) {     String paramValue = paramValues[0];     if (paramValue.length() != 0) {      System.out.println("参数：" + paramName + "=" + paramValue);      map.put(paramName, paramValue);     }    }   } }