Solved

Retriving request parameters in different languages in servlets

Posted on 2008-10-04
7
521 Views
Last Modified: 2013-11-24
Hi,

I am building HTTP Interface for bulk sms messaging system using servlets as primary technology. It will receive the sms requests from clients and forward it to the Telecome bulk sms gateway. At present the servlets are able to receive request in english languages. But when i try to send parameters in other languages like hindi, marathi, arabic, chinese, etc. the servlet receives the parameters but it comes as ???? while debugging. So what is the problem here?

Code:
String accountName = request.getParameter("accountName");
String password = request.getParameter("password");

Regards,
Nirav Pradhan
0
Comment
Question by:Nirav_Pradhan
  • 3
  • 2
7 Comments
 
LVL 5

Expert Comment

by:libin_v
ID: 22643829
Use getCharacterEncoding to convert
public String getText(HttpServletRequest request)
{
  String value = request.getParameter("mytext");
 
  try{
    value = new String(value.getBytes(), request.getCharacterEncoding());
  }catch(java.io.UnsupportedEncodingException ex){
    System.err.println(ex);
  }
 
  return value;
}

Open in new window

0
 

Author Comment

by:Nirav_Pradhan
ID: 22643887
I made the changes as you said, but the got the following error which is attachted.




String accountName = new String(request.getParameter("accountName").getBytes(),request.getCharacterEncoding());
String password =  new String(request.getParameter("password").getBytes(),request.getCharacterEncoding());
 
the error code:
 
HTTP Status 500 - 
 
--------------------------------------------------------------------------------
 
type Exception report
 
message 
 
description The server encountered an internal error () that prevented it from fulfilling this request.
 
exception 
 
java.lang.NullPointerException: charsetName
	java.lang.String.<init>(String.java:442)
	java.lang.String.<init>(String.java:516)
	com.maaxsms.servlets.LoginServlet.processRequest(LoginServlet.java:40)
	com.maaxsms.servlets.LoginServlet.doGet(LoginServlet.java:85)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
 
 
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.16 logs.
 
 
--------------------------------------------------------------------------------
 
Apache Tomcat/6.0.16

Open in new window

0
 
LVL 5

Expert Comment

by:libin_v
ID: 22645255
if(request.getCharacterEncoding() == null)
   request.setCharacterEncoding("UTF-8");

Try this set a default CharEncoding
0
Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

 

Author Comment

by:Nirav_Pradhan
ID: 22645590
I tried the suggestion, this time there is no error but the parameter's value is still coming as ????.


if(request.getCharacterEncoding() == null)
    request.setCharacterEncoding("UTF-8");
 
String accountName = new String(request.getParameter("accountName").getBytes(),request.getCharacterEncoding());
String password =  new String(request.getParameter("password").getBytes(),request.getCharacterEncoding());

Open in new window

0
 
LVL 1

Accepted Solution

by:
rainmaker2k earned 500 total points
ID: 22649759
The getBytes method can also take a parameter from which encoding you're starting. As far as I know all browsers send ISO-8859-1 as their default encoding.

So, what you need to for each of those parameters is something like this:
new String(request.getParameter("accountName").getBytes("ISO-8859-1"), "UTF-8")

You might also want to play around with the UTF-8 parameter. Depending on the type of language/characterset, this might need to change.
0
 

Author Closing Comment

by:Nirav_Pradhan
ID: 31503142
Thank you very much. The last solution which you provided, it worked.
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
The viewer will learn how to implement Singleton Design Pattern in Java.

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now