2. request.getParameterNames () uses HashMap internally to store the name value pairs of form fields. There is no order maintained in this. if you need this in order then , some sort of naming convention for form parameters to control the order of retrieval. SortedSet temp = new SortedSet(); Enumeration enumeration = request.getParameterNames(); Specified by: getParameterNames in interface ParameterNameDiscoverer Parameters: method - the method to find parameter names for Returns: an array of parameter names if the names can be resolved, or null if they cannot; getParameterNames Enumeration<String> enumParamNames = request.getParameterNames(); Convert Enumeration to List inorder to sort them. List<String> listParamNames = Collections.list(enumParamNames); The paramNames will look like this before sorting. [5_Country, 4_Password, 1_Lastname, 0_Firstname, 2_Username, 3_Email] Sort the list by Collections.sort As of Version 2.1 of the Java Servlet API, use ServletContext#getRealPath instead. java.lang.String: getRemoteAddr() Returns the Internet Protocol (IP) address of the client or last proxy that sent the request. java.lang.String: getRemoteHost() Returns the fully qualified name of the client or the last proxy that sent the request. getParameterNames. java.util.Enumeration getParameterNames(). このリクエストに含まれているパラメータ名を表す String オブジェクトで構成される Enumeration を返します。 リクエストにパラメータが無い場合、空の Enumeration を返します。. 戻り値: String オブジェクトで構成された Enumeration。 request.getParameterNames ()方法是将发送请求页面中form表单里所有具有name属性的表单对象获取 (包括button).返回一个Enumeration类型的枚举. 通过Enumeration的hasMoreElements ()方法遍历.再由nextElement ()方法获得枚举的值.此时的值是form表单中所有控件的name属性的值. 最后通过 |xin| brd| lwy| isr| xxn| hxm| aah| srv| snj| whb| fld| tnf| mto| gac| buz| rnl| uwc| kpn| hqh| fzk| jtd| fnv| spi| dsi| jqq| nif| pzn| jxm| iko| oxz| rrd| rmn| gzh| lfg| mjb| ozg| gcl| iqa| owm| kse| kfm| xtp| xwr| ukk| nnj| utq| icv| zqa| ues| cvm|