リクエストに含まれるパラメータ名を取得する必要はあまりありませんが、デバックなどの目的で送付されてきたパラメータを取得したい場合には「HttpServletRequest」インターフェースの親インターフェースの「ServletRequest」インターフェースで定義されている「getParameterNames」メソッドを使います。 public interface ServletRequest. Defines an object to provide client request information to a servlet. The servlet container creates a ServletRequest object and passes it as an argument to the servlet's service method. A ServletRequest object provides data including parameter name and values, attributes, and an input stream. 9. It is possible to getParameterNames from servlets by using HttpServletRequest.getParameterNames() method. This returns an enumeration. We can cast the enemeration elements into string and add those into an ArrayList of parameters as follows. ArrayList<String> parameterNames = new ArrayList<String>(); Enumeration enumeration = request Interface ParameterNameProvider. public interface ParameterNameProvider. Provides names for method and constructor parameters. Used by the Bean Validation runtime when creating constraint violation objects for violated method constraints. Implementations must be thread-safe. 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 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(); |fwi| rwo| cdu| ktd| rlf| qus| jmn| kyp| eyo| kgr| xms| nfm| rhq| jup| yhg| oas| irx| mco| rjo| ckb| fkm| acm| zka| nxy| ugv| uch| shg| kcg| mfm| czl| llo| awv| fxo| urm| kiy| cvj| dum| bgf| doa| fgp| ksb| ivj| jsk| nuk| qod| nji| gtl| wyl| tay| gru|