Solve the form post get to springMVC background confusion problem

1. The foreground form is directly post or get, while the background form is received as request.getParameterMap () or request.getParameter ()

Note: Foreground, springmvc filters, and jsp, compiler encodings are all es11EN-8 examples

With request. getParameterMap (), for example

Note: Here is a method to get parameters from HttpServletRequest, while request is similar to

@RequestMapping("/tradePortal/ReceiveCommands") 
public ModelAndView receiveCommands(HttpServletRequest request, HttpServletResponse response){} 

In this method

public static Map<String,String> getParamters(HttpServletRequest request){
    logger.info(" Start getting the request parameters ");
    Map<?,?> paramterMap = request.getParameterMap();
    Map<String ,String> paraMap = new ConcurrentHashMap<String, String>();
    for (Map.Entry entry :
        paramterMap.entrySet()) {
      if (Array.getLength(entry.getValue())<1||StringUtil.isEmpty(((String)(Array.get(entry.getValue(),0))))){
        paraMap.put((String)entry.getKey(),null);
      }else {
        if (request.getMethod().equalsIgnoreCase("get")){
          try {
            paraMap.put((String)entry.getKey(),new String(((String)(Array.get(entry.getValue(),0))).getBytes("ISO-8859-1"),"utf-8"));
          } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
          }
        }else {
          paraMap.put((String)entry.getKey(),(String)(Array.get(entry.getValue(),0)));
        }
      }
    }
    logger.info(" The parameters are obtained. Parameters as follows: "+ JSON.toJSONString(paraMap));
    return paraMap;
  }