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Request parameter is modified in my servlet

I sent one request as URL with data to servlet, But by default servlet is modifying the data and sending as request. Can you please suggest how to maintain the request URL with data which i passed to servlet should remain same ?
Example:- when i am passing the data to servlet
http://localhost/helloservlet/servlet/ppd.abcd.build.coupons.CouponValueFormatterServlet?dsn=frd_abc_abcde&lang=ENG&val=PRCTXT|12345 &ABCDEFG
when it using the above url in servelt as request , like string abc = request.getParameter("val"), the val attribute is trimmed automatically and assigned as " val=PRCTXT|12345" but it supposed to be like " val = PRCTXT|12345 &ABCDEFG ". Please help me on this.

The servlet interprets each & in the URL as the start of a new parameter. So when it sees &ABCDEFG, it thinks you are sending a new parameter called ABCDEFG with no value (though this is technically a "keyless value" according to the specifications).
Two things to fix this, first is when you want to actually send an &, use %26 instead. This will be skipped by the code that divides up the parameters, but converted to a real & in the parameter's value.
Second is to replace spaces with +. Spaces in URLs work sometimes but can be problematic.
So your actual request URL should look like this:
http://localhost/helloservlet/servlet/ppd.abcd.build.coupons.CouponValueFormatterServlet?dsn=frd_abc_abcde&lang=ENG&val=PRCTXT|12345+%26ABCDEFG
If you're building these parameters in javascript, you can use encodeURIComponent() to fix all problem characters for you. So you could do something like this:
var userInput = *get some input here*
var addr = 'http://www.example.com?param1=' + encodeURIComponent(userInput);

How to change slf4j log into html link

I have java code as:
final URI myUri = new URIBuilder()
.setScheme(azkabanHostProtocol)
.setHost(azkabanHost + ":" + azkabanPort)
.setPath("/executor")
.setParameter("execid", executionID).build();
logger.info(myUri.toString());
I want to display myURI in form of an url/html link into Azkaban's logs so that by clicking on the url it is opened. I am using log4j for logging.

You may create your own Layout class extending HTMLLayout .
Then override the format method to suit your needs.
The actual implementation has the following lines, that you may want to replace :
sbuf.append(Transform.escapeTags(event.getRenderedMessage()));
See that all tags in the message String, will be escaped by default.
Your version could be based on a kind of marker, say String mark = "[LINK]"; for instance
if(event.getRenderedMessage().startsWith(mark)){
String uri = event.getRenderedMessage().substring(mark.length());
String link = "" + uri + "";
sbuf.append(link);
}
else
sbuf.append(Transform.escapeTags(event.getRenderedMessage()));
And you would call the logger this way :
logger.info(mark + myUri.toString());
The following topic will help you use a custom HTMLLayout : how to change htmllayout in log4j2
Here is the source code for the default HTMLLayout, as a starter.

How do you view the Azkaban log files? If they are just raw text files being viewed with a vanilla text editor then there is no way to accomplish what you want. If you are viewing them in a smarter UI then you need to format them according to what that UI requires.
In short, the answer to your question is completely driven by whatever tool you are using to view the logs.

How to get an xsp value from URL link using Java

I am trying to retrieve the page name(.xsp)from the URL of the current page using Java. i have been able to accomplish the same thing with the Javascript below
context.getUrl().getSiteRelativeAddress(context).toString()
and it works but i want to get the same thing don using Java.

The best way to get SSJS variable names via Java is resolveVariable. This should work:
XSPContext context = (XSPContext) ExtLibUtil.resolveVariable(FacesContext.getCurrentInstance(), "context");
String pageName = context.getUrl().getSiteRelativeAddress(context).toString();
(Updated with correct syntax for second line, thanks Knut)

How to add a parameter to a URL in GWT?

I have a Java/GWT application. In that there is a list of items. If I click on any item title then that item is opened with full description.
I am using Anchor for the item title, so what I want is when user clicks on item title then in the URL the id of that item is appended to the current URL.
For example, this is my URL:
"http://127.0.0.1:8888/MyApp.html?gwt.codesvr=127.0.0.1:9997#listItem?list"
and I have to append id to the end of the URL like:
"http://127.0.0.1:8888/MyApp.html?gwt.codesvr=127.0.0.1:9997#listItem?list&itemId=55"

Using Window.Location should do your trick : see the doc here
Something like this :
String url = Window.Location.getHref();
url = url + "&itemId=" + itemId;
Window.Location.replace(url);
Although of course, as Crollster pointed out, you should insert your url parameter before the # sign. Give more details on what you're looking for exactly (why do you have to add the parameter manually, does the page have to reload ...)

you can use redirect command in order to add this parameter
response.sendRedirect(your url + itemId=55);
Then you can extract this variable.
I hope this will help.

You can try with javascript coding.When the user clicks on link, get this URL and appends your id to it and reconstruct the URL.

You see that # in the URL? Thats an anchor - you will need your parameter to be added before that, so it looks like this:
http://127.0.0.1:8888/MyApp.html?gwt.codesvr=127.0.0.1:9997&itemId=55#listItem?list
HTH

URIBuilder of Apache HttpComponents offers a convenient method to add parameters and will deal with existing query parameters and anchors.

Camel: How to include an ampersand as data in a URI (NOT as a delimiter)?

(Camel 2.9.2)
Very simple use case, but I can't seem to find the answer. My code boils down to this:
String user = "user";
String password = "foo&bar";
String uri = "smtp://hostname:25?username=" + user +
"&password=" + password +
"&to=somthing#something.com"; // etc. You get the idea
from("seda:queue:myqueue").to(uri);
Camel throws a ResolveEndpointFailedException with "Unknown parameters=[{bar=null}]."
If I try "foo%26bar," I get the same result.
If I try "foo&bar" camel responds with "Unknown parameters=[{amp;bar=null}]."
I tried using URISupport to create the URI. It escapes the & to %26, and then I get "Unknown parameters=[{bar=null}]" again.
Any ideas?

As from Camel 2.11 you could use raw syntax
For instance:
.to("ftp:joe#myftpserver.com?password=RAW(se+re?t&23)&binary=true"
In the above example, we have declare the password value as raw, and
the actual password would be as typed, eg se+re?t&23
https://cwiki.apache.org/confluence/display/CAMEL/How+do+I+configure+endpoints

You can specify the password as part of the authority of the uri, eg in the front.
Also the & should be escaped to %26, but there was a bug in Camel that didnt parse the escaped value to well. Try 2.10 when its out.

The RAW() syntax works, yet it is Camel-proprietary syntax. In our usecase it burdened following processing of URI.
We used alternative solution: component configured as using raw URIs (Component.useRawUri() == true). Component parameters are then simply once encoded (foo%26bar) and pass through Camel without change. I consider this solution better as percent-sign encoding is standard way of expressing sensitive characters.