1.新建工具类PageData,定义如下方法。

public Map getPageData(HttpServletRequest request){
        Map properties = request.getParameterMap();
        Map returnMap = new HashMap();
        Iterator entries = properties.entrySet().iterator();
        Map.Entry entry;
        String name = "";
        String value = "";
        while (entries.hasNext()) {
            entry = (Map.Entry) entries.next();
            name = (String) entry.getKey();
            Object valueObj = entry.getValue();
            if(null == valueObj){
                value = "";
            }else if(valueObj instanceof String[]){
                String[] values = (String[])valueObj;
                for(int i=0;i<values.length;i++){
                    value = values[i] + ",";
                }
                value = value.substring(0, value.length()-1);
            }else{
                value = valueObj.toString();
            }
            returnMap.put(name, value);
        }

        return returnMap;
    }

2.使用

Map data = new PageData().getPageData(request);

Q.E.D.