Abhishek Asthana

Detailed from the javadoc:


public static Boolean valueOf(boolean b)
Returns a Boolean instance representing the specified boolean value. If the specified boolean value is true, this method returns Boolean.TRUE; if it is false, this method returns Boolean.FALSE.

Parameters:
b - a boolean value.
Returns:
a Boolean instance representing b.

public static Boolean valueOf(String s)
Returns a Boolean with a value represented by the specified String. The Boolean returned represents the value true if the string argument is not null and is equal, ignoring case, to the string "true".
Example: Boolean.valueOf("True") returns true.
Example: Boolean.valueOf("yes") returns false.

Parameters:
s - a string.
Returns:
the Boolean value represented by the string.

And since the second method does not return an instance, it is recommended to be used instead of constructor Boolean(String value).

From the Boolean javadoc:

public static Boolean valueOf(boolean b) Parameters: b - a boolean value. Returns: a Boolean instance representing b.

Wheras:

public static Boolean valueOf(String s) Parameters: s - a string. Returns: the Boolean value represented by the string.


What I am not able to understand is that since for both methods return type is same, how come for one a new Boolean instance is being returned and for the other boolean primitive is being returned.

Any pointers will help.

Thanks
Abhishek

OK, this is the solution:
Instead of
item.getString()
or
new String(item.getString().getBytes(), "UTF-8");

do : item.getString("UTF-8").trim()

Actually I first tried using just
item.getString()
when that didn't work, I used
new String(item.getString().getBytes(), "UTF-8");

Yes, I tried passing encoding explicitly, but that doesn't work either. I am using Weblogic server. Can we set encoding for weblogic also?

Please Please Please guys, this is very critical for me. Please help!

Thanks
Abhishek

I have a form in which user can upload a file and another field 'name' in which she can give any name to the file being loaded. (Please see the image in attachements) When I submit the form, the file is uploaded fine but the value in name field is messed up. I have followed all the possible suggestions I found:

1) <%@page pageEncoding="UTF-8"%> set.
2) <%@page contentType="text/html;charset=UTF-8"%> set after the first directive.
3) <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/> in the head.
4) enctype="multipart/form-data" attribute in the form.
5) accept-charset="UTF-8" attribute in the form.

in the Servlet:
1) before doing any operations on request object: request.setCharacterEncoding("UTF-8");

2) Getting the value: FileItem item = (FileItem) iter.next(); if (item.isFormField()) { //For regular form field: name = item.getFieldName(); //converting from default encoding to UTF-8. value = new String(item.getString().getBytes(), "UTF-8"); }

On the UI, I can see the characters properly but when the value is being passed to java strings, all hell breaks loose!

But nothing seems to be working.

This issue is coming in this form only where enctype is multipart/form-data. Rest everywhere having just 1) and 2) work fine.
Can someone please give some ideas what can be going wrong?

Thanks
Abhishek

Hi

I created a small webservice using Jersey framework. I added couple of methods in the service. Below is the code:
@Path("/users/") public class UsersResource { @Context UriInfo uriInfo; ArrayList<UserResource> usersList = new ArrayList<UserResource>(); @GET @Path("{userid}/") public UserResource getUser(@PathParam("userId") String userid) { ArrayList usersList = getUsers(); UserResource user = (UserResource)usersList.get(Integer.parseInt(userid)); return user; } @GET @Produces("application/json") public JSONArray getUsersAsJsonArray() { JSONArray uriArray = new JSONArray(); ArrayList<UserResource> usersList = getUsers(); for (UserResource user : usersList) { UriBuilder ub = uriInfo.getAbsolutePathBuilder(); URI userUri = ub.path(""+user.getUserId() ).build(); uriArray.put(userUri.toASCIIString()); } return uriArray; } }

I try to access the service using following client code:

ClientConfig cc = new DefaultClientConfig(); Client c = Client.create(cc); WebResource wr = c.resource(UrlBase); System.out.println("Getting list of users:"); JSONArray users = wr.path("users/").accept("application/json").get(JSONArray.class); System.out.println(String.format("List of users found:\n%s", users.toString())); System.out.println("-----"); System.out.println("Getting test user before update:"); JSONObject user = wr.path("users/8").get(JSONObject.class); System.out.println(String.format("User found:\n%s", user)); System.out.println("-----");

The first method succeeds and gives list of users but second call fails with following exception:
TEST FAILED! :-( com.sun.jersey.api.client.UniformInterfaceException: GET http://localhost:8084/TimerService/resources/users/8 returned a response status of 500 at com.sun.jersey.api.client.WebResource.handle(WebResource.java:563) at com.sun.jersey.api.client.WebResource.get(WebResource.java:179) at domainobjects.Main.main(Main.java:63)

I am not able to understand what is wrong here. I tried changing the path also users/8 and users/8/ both fail.
Can someone please give any clues?

Thanks
Abhishek

Hi

I am very new to Hibernate. I did my 'Hello World' with a Netbeans tutorial which showed how to generate the POJOs and mapping files from the relational tables, which seemed very logical to me!

However now when I am reading more about it, the books mention that classes are written first, then mapping files and then the DB is created. I am slightly confused. Can someone please tell me which is correct approach (I mean, how is it done in real world)

Thanks
Abhishek

That worked Shailesh.

Thanks very much.

Hi

I am using AJAX to save a name value. This is my JS code in the JSP file:

function savePaneName(){ if(activePane!=null){ var url = <some url> var paneName = document.getElementById("paneName").value; var params="ACTION=SAVE_PANE_NAME"; params=params+"&PANE_NAME="+paneName; http.open('POST',url,true); http.onreadystatechange = handlerPaneName; http.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); http.send(params); } }

In my servlet I simply extract the parameters and use them:

String paneName= request.getParameter("PANE_NAME");

This works fine until user gives name like 'This & That' (anything that has an '&'). When this happens the servlet gets only the string before & (eg. 'This ')
This is happening because it thinks that there is another parameter due to occurrence of &.

Using & doesn't work too, because & comes there also.

Can someone please suggest how can I work around this?

Thanks in advance

Joseph

If you have created a web project in NetBeans, you must be having a Web Pages folder under your project directory. This will have more folders like:
META-INF
WEB-INF
and your JSP pages.

You can create an images folder right here. And access the images simply images/imagesname.jpg

Hope this helps.

Rahul

You may want to have a look at MVC architecture. To put it simply, put your 'business logic' in servlet (if you don't want to put in some other 'model' class) and send it to JSP, which will form the presentation layer.

I guess you wanted to avoid business logic in JSP and hence decided to put presentation logic in servlet, but as Bear said it is not correct too!

Umm Leinad, let's put it this way: A browser doesn't know what is a JSP (or ASP/PHP/Ruby whatever), it can show only HTML.
A JSP page has HTML content interspersed with scriptlets/expressions/JSTLs which are executed on Tomcat to create HTML content, which is sent to browser. So in the end, our humble browser gets to see just the HTML stuff which it dutifully renders!

So, whatever javascript you want to put in your page, put it in your JSP. It will be untouched by server and sent to browser.

Hope this helps.

Abhishek

If it is a servlet, do the redirect conditionally.

Bauke Scholtz wrote:That does not necessarily have to be a form. A plain vanilla link can also perfectly point to some servlet.

That's right Bauke! Form is not needed. Thanks for correcting.