I got an XLS pic inside of an HTML link, and i need to verify some information first before calling to the servlet, that's why i'm not including the servlet inside of the href="". So i've created a javascript function that verifies the input information in order to be used by the servlet.
(The Servlet returns a XLS in order to be saved by the user).
Tried this:
document.location.href = 'saveExcelServlet.do?' + <<GET method attributes>>;
But it didn't work.
It says:
Problem accessing /wscall-metrics-web/saveExcelServlet.do. Reason:
null
Caused by:
java.lang.NumberFormatException: null
If i write it works...
Can anyone help me?
Thanks.
M.
There's a good chance the URL isn't quite built the way you expect. A great poorman's technique for debugging this kind of thing is to assign a variable and pop it up in an alert:
var newLoc = 'saveExcelServlet.do?' + <<GET method attributes>>;
alert(newLoc);
You can see exactly what URL is getting fetched.
Related
I have a Java class that mainly contains strings. It does not have a layout as it is neither a Fragment nor an Activity. It is more used as an auxilliary class. I would like to assign the String values in the class by using the Resource strings as I would like to automatically translate the Strings. Howvever, I can't access the string resources from Java. I use the following code:
static String more = getString(R.string.more);
And in the XML file I have the ressource:
<string name="more">More</string>
I get the error message
Cannot resolve method 'getString'
I also tried static String more = getContext().getString(R.string.more);
but I got the error message:
Cannot resolve method 'getContext'
Would anyone mind helping me on that? I'd appreciate every comment.
Update: I tried to use the answer from "MikaelM"
Resources.getSystem().getString(R.string.more)
However, I get an "exception in initializer error" and when I use the initial String again, I do not get this error. So I still can't get the String from the ressource. DO you have an idea what I can do? I'd appreciate every further comment.
So the error is caused by "Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x7f120038"
The strange thing is that the resource in fact exists (I checked this several times).
getString(R.string...
is not the same as
Resources.getSystem().getString(android.R.string...
Only the second variant you can use in the static context. Alas, you can get this way only system resources.
If you need to get your own resources, no one-line solution exists. Use https://stackoverflow.com/a/4391811/715269 solution of #Cristian. And notice: it is a very good solution, even more, it is the solution meant to be used by the creators of Android.
You should be able to get your string with:
Resources.getSystem().getString(R.string.more)
See more here, getString Outside of a Context or Activity
I've build a method which takes strings as input parameter. In my index.jsp page, I retrieve a GET-variable from the URL using request.getParameter(). Now, I want to call the aforementioned method on this string, but I get a compiler error saying:
The method <method name>(String) is undefined for the type __2F_<webapp name>_2F_src_2F_main_2F_webapp_2F_index_2E_jsp".
Does anyone know why I get this error and how I can get rid of it. Any help is greatly appreciated!
My code is rather lengthy, but I think this is relevant code:
categorie = request.getParameter("categorie");
if (categorie.equals("")) {
categorie = "Category;";
}
ArrayList<String> categorieen = queryCategories(categorie);
You are calling ArrayList<String> categorieen = queryCategories(categorie); and you did not define queryCategories method. Since the JSP page is compiled into a big servlet class, it tries to locate queryCategories method as member of that class and it could not find it.
Very little information. Where is your app deployed? From what I gather, it seems you either haven't restarted the deployed app or have not replaced the changed class file and haven't set some sort of "development mode" on wherein you don't require a restart for a Jsp modification.
Just replace the .jsp and JSP_NAME.class file.
I'm trying to unravel a Webservice work and replicating it's call, but I've been unable to do it.
In this website, if you input, for example, HY6210 a new window appears with data already filled in.
Using Firebug I was able to determine it was calling
this link,
but no matter what I do in terms of parameters, headers, and cookies, I always get either:
throw 'allowScriptTagRemoting is false.';
//#DWR-REPLY
if (window.dwr) dwr.engine._remoteHandleBatchException({ name:'java.lang.SecurityException', message:'Call IDs may only contain Java Identifiers' });
else if (window.parent.dwr) window.parent.dwr.engine._remoteHandleBatchException({ name:'java.lang.SecurityException', message:'Call IDs may only contain Java Identifiers' });
or
throw 'allowScriptTagRemoting is false.';
//#DWR-REPLY
if (window.dwr) dwr.engine._remoteHandleBatchException({name:'org.directwebremoting.extend.ServerException', message:'The specified call count is not a number' });
else if (window.parent.dwr) window.parent.dwr.engine._remoteHandleBatchException({ name:'org.directwebremoting.extend.ServerException', message:'The specified call count is not a number' });
Any ideas on what I'm doing wrong?
Suppose, historyTracking is the class name and getStoppageV3 method then you pass device1 variable in JavaScript and then you forcefully convert this variabal in string then you use device1.toString().
Example:
historyTracking.getStoppageV3(device1.toString()
I have a JSP that takes an Arraylist from the session object and removes the items from it. It seemed to be working fine and then out of nowhere when I navigate to that page, the page is blank. I checked the Tomcat log files and in catalina.out I am receiving a JasperException an it is showing it as being on a line with the following
for(int i; i < agentItems.size(); i++)
agentItems is the name of the ArrayList I am using. I have been debugging it and can't seem to figure out what the problem might be. I have read that a JasperException is sometiems thrown as a JSP's NullPointerException. Is this true or am I just completely overlooking the problem?
I have the web application running on a local machine and a intermediate server for development in which both of them have had no trouble. Why could it be that only on this server it is giving me problems?
That can be everything. You need to look a bit further in the stacktrace, peek to the caused by or root cause part and the trace which comes thereafter. It can be caused by many things. The JSP basically get compiled into one large try block and any catched Throwable will be wrapped into a servletcontainer specific exception like JasperException in Tomcat and clones. It boils down to this:
try {
// All translated JSP code comes here. Max 64K.
} catch (Throwable t) {
throw new JasperException(t);
}
Check the .java filename in the 1st line of the stacktrace, locate this in the work directory of the servletcontainer and open the file in an editor. Do you see it?
That said, using scriptlets is a bad practice. Use Servlets to control/preprocess/postprocess requests, use Javabeans to represent data models, use Taglibs in JSP to control the page flow and output, use Expression Language (EL) in JSP to access backend data. In your specific case, you can loop over an array or List using JSTL's c:forEach tag.
<c:forEach items="${agents}" var="agent">
<p>Agent: ${agent.name}
</c:forEach>
jasperexception can also occur when JSP is not able to access an element or item it's obtaining from outside and here it maybe is unable to access agentItems. Try to provide fully qualified class name or import the package otherwise.
I am using Struts 2.1.8 and facing validation problem in IE. I am getting the following error
An exception occurred: Error. Error message: Invalid argument.
I tried out to figure out the cause and found the following. My generated javascript code is:
field = form.elements['district.name'];
var error = "Enter only alphabets for district";
if (continueValidation && field.value != null && !field.value.match("^[a-zA-Z ]*$")) {
addError(field, error);
errors = true;
}
I tried to mock up by putting the same code in a function and calling it in onclick event. The method addError() throws the exception and the reason is field variable. If I change it to field[0], it works fine. How to fix this error?
Check the generated HTML source. Open the page in webbrowser, rightclick and choose View Source. Is the input field's name really district.name? Isn't it prefixed/suffixed with some other autogenerated key (possibly the ID/name of the <form>) like as many other MVC frameworks do? If so, you'll need to change the JavaScript code accordingly that it uses the right element name as it appears in the HTML DOM tree. You know, JavaScript runs at the client machine and only sees the generated HTML DOM tree, not the "original" server-side code which is responsible for generating the HTML.