jsp

问题 Need help.I have a hash map which is returned from a spring controller to JSP.Is there a way just to check if a certain key exists irrespective of any value(the value may be null too) Say, the below hash map is being sent from the controller HashMap hmap = new HashMap(); hmap.put("COUNTRY", "X"); hmap.put("REGION", null); If the key REGION exists ( value may be anything including null) then display some section in the jsp. I am trying to access the key as ${hmap['REGION']} Thanks in advance.

问题 Need help.I have a hash map which is returned from a spring controller to JSP.Is there a way just to check if a certain key exists irrespective of any value(the value may be null too) Say, the below hash map is being sent from the controller HashMap hmap = new HashMap(); hmap.put("COUNTRY", "X"); hmap.put("REGION", null); If the key REGION exists ( value may be anything including null) then display some section in the jsp. I am trying to access the key as ${hmap['REGION']} Thanks in advance.

问题 Under heavy load I see lot of threads getting locked when GZipping and decompressing the JSP file. The thread dump looks like below. Seems to be coming from "header.jsp" which is of size 14Kb. http-0.0.0.0-8080-304" daemon prio=3 tid=0x0000000008bcc000 nid=0x302 runnable [0xfffffd7de7bc2000] java.lang.Thread.State: RUNNABLE at java.util.zip.Deflater.deflateBytes(Native Method) at java.util.zip.Deflater.deflate(Deflater.java:306) - locked <0xfffffd7e589078e8> (a java.util.zip.ZStreamRef) at

问题 I am making my first project using Angularjs 1.4.3 . In my controller I am making a http request, in the success method of this http request I am updating a scope variable. In http call I am getting the latest values but in the view side its not updating the values. Plunker Link (@rupesh_padhye thanks). (Since it is calling the servlet action, so no data will be shown in Plunker ) app.controller('measuresCtrl', ['$scope', '$modal', '$http', function($scope, $modal, $http) { $scope.groups = []

问题 I am making my first project using Angularjs 1.4.3 . In my controller I am making a http request, in the success method of this http request I am updating a scope variable. In http call I am getting the latest values but in the view side its not updating the values. Plunker Link (@rupesh_padhye thanks). (Since it is calling the servlet action, so no data will be shown in Plunker ) app.controller('measuresCtrl', ['$scope', '$modal', '$http', function($scope, $modal, $http) { $scope.groups = []

问题 I am making my first project using Angularjs 1.4.3 . In my controller I am making a http request, in the success method of this http request I am updating a scope variable. In http call I am getting the latest values but in the view side its not updating the values. Plunker Link (@rupesh_padhye thanks). (Since it is calling the servlet action, so no data will be shown in Plunker ) app.controller('measuresCtrl', ['$scope', '$modal', '$http', function($scope, $modal, $http) { $scope.groups = []

问题 I have a JSP form. My requirement is to get this form's data and create a java beans object on the server side. Example: my form has fields like Name, SSN, EMAIL & Phone Number public class Test { long ssv= 1282199222991L; long phone= 4082224444L; String email = "abcdef@yahoo.com"; String name="abcdef" } From the knowledge i have , i was thinking to create bean object using servlet, which is created out of JSP, at the server side. My question is how i access this "server created" servlet for

问题 Im trying to login from a jsp page, using a loginServlet. It redirects to the servlet, but it doesn't make the authentication and throws an error. Here is the code: JSP file: <div class="container"> <div class="row"> <div class="box"> <div class="col-md-6 col-md-offset-4"> <h2 class="intro-text">Welcome! Login here:</h2> <form class="form-horizontal" action="LoginServlet" method="POST"> <div class="form-group"> <label class="control-label col-sm-2" for="username">Username:</label> <div class=

问题 The default behaviour of tomcat sessions is to persist them on shutdown and restore them after startup. This works on my simple test application as expected. But when I add form based authentication the user login (User principal) won't get restored on tomcat restart. Even the example application located under /examples/jsp/security/protected/index.jsp does not restore the login. Is there any way to achieve session/authentication restoration without clustering/replication as suggested

问题 The default behaviour of tomcat sessions is to persist them on shutdown and restore them after startup. This works on my simple test application as expected. But when I add form based authentication the user login (User principal) won't get restored on tomcat restart. Even the example application located under /examples/jsp/security/protected/index.jsp does not restore the login. Is there any way to achieve session/authentication restoration without clustering/replication as suggested