How to mention encoding in servlet.

Hi
How to mention encoding in servlet.
Regards
Arghya Banerjee

I suppose your question may refer to the setContentType method discussed here:
http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/ServletResponse.html
If not, ask a more specific question.

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How do i run a servlet??????

running servlets:i downloaded jsdk but how do i run a servlet? i got the error
C:\WINDOWS\Desktop>javac HTTPGetServlet.java
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/tools/javac/M
ain
when i tried to run my servlet, please help
thanks

As mentioned in another post in the thread, servlets run from within a web server that has pre-loaded the jvm and serves web requests. Often they are called 'sevlet containers' as they act like a wrapper program for the actual vm. Tomcat is such a web server, quite a popular one for running servlets, and is considered the reference implementation for a sevlet/jsp server. you can read up on it at...
http://jakarta.apache.org/tomcat/index.html
To get you started, this is what i did to set up tomcat. Im using RedHat Linux at home, so this may differ to what you have to do initially.
First, make sure you have at least the jsdk and jsdk ee installed and the appropiate JAVA_HOME and J2EE_HOME environment variables set.
I am using the Apache web server to handle web page requests on my box. If the request is for a context containing a servlet or jsp file (context is a tomcat term for a particular location or path in the url) then apache passes the request to tomcat via a apache module and a special protocol. Tomcat then runs the .class file or .jsp file, returns the output to apache which then returns the output back to the browser. So initially you should set up and have the apache web server running.
Next download and install the jserv or tomcat module for apache, which apache uses to communicate with tomcat via a special protocol, and the tomcat rpms from...
http://jakarta.apache.org/builds/jakarta-tomcat/release/v3.2.3/rpms/
...Im using 3.2.3 which works fine. you may try the later versions if you like.
Install the tomcat rpms. They should dump a whole lot of stuff in a /var/tomcat directry, including some nice sample and admin apps. if you had downloaded and installed the tomcat-manuals rpm you can find lots of helpful information in the /usr/doc/tomcat-{your version here}/ directry. This is what you should probably read through now!
Once that is done, its simply a matter of adding a reference in your httpd.conf file to the tomcat.conf file in the tomcat/conf dir (if you want to have complete control over the tomcat module and contexts) or tomcat-apache.conf (in the same directry) if youd like tomcat to handel its own configuration of apache. something like...
include /var/tomcat/conf/tomcat.conf
...should do.
then run tomcat start (in /usr/bin/) and apache and away you go. You should be able to point your browser to your.server.com/admin/ and get the tomcat admin tools. This allows you to add view and delete contexts to your server (say for separating different server-side applications). your.server.com/examples/ has some nice stuff as well.
Hope this helps. I warn you im not an expert and haven't looked at this stuff for some time. I probably have something wrong so please, experts, if you see something stuffed up let us know.

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I want to call, consecutively these methods in my application.
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I think, the first method redirect s with response ,
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http://localhost:8080/testProject/TestServlet
http://localhost:8080/testProject/servlet/TestServlet
http://localhost:8080/testProject/servlet/[packagenamewithpoints]TestServlet
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etc etc
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in web.xml use servlet mapping
<servlet-mapping>
<servlet-name>TestServlet</servlet-name>
<url-pattern>/doit</url-pattern>
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how do we run a servlet program in eclipse.

Not at all, because servlets require a servlet container. Some Eclipse plugins (Lomboz etc.) do provide integration with those.

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I want to test a small part of a servlet. That part connects to a database through a DataSource which is obtained in this manner:
Context ctx = new InitialContext();
ds = (DataSource) ctx.lookup(dsLookup);
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It's really annoying to start the browser, get to the page I'm interested, make the neccesary request and then see what happens in my code.
What I've learned so far:
I can't test it in a main function because I can't get the context. I tried setting the context's properties, still no go.
I found this: http://www.ibm.com/developerworks/rational/library/08/0219_jadhav/
but I got lost when it came to adding the resource reference to the project. How can one do that in Eclipse?
Can anyone please, please, pretty please with sugar on top, explain to me how I can do this?
Thank you very much for your time,
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Thank you for your prompt reply. I still have some questions:
You say that configuration must go in the web.xml file. I don't have that file. In the tutorial example one application is a Java project the other is an application client and the other is an EAR of the application client. Neither of them have a web.xml file. So where do I set the resource?
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How to mention the relative path of the file in fileinputstream?
The directory structure is as follows,Inside the **model** folder i have a java file called GetContents.java
I need to refer the input.xls file inside the template folder in GetContents.java.file.
I tried new FileInputStream("..\\..\\..\\template\\DevContentsTemplate.xls") cos the GetContents.class file will be inside webcontent\web-inf\classes\model\GetContents.class and I thought if i use the above relative path , it should refer webcontent\web-inf\template\input.xls
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morshed_nsu wrote:
if so then for one ../ you will reach classes folder. for another you will reach the folder containing src, classes, templates etc.
So you do not need 3 escapes.I posted that same answer 7 hours before you did! What part of your answer is any additional help compared to mine? It's fine to give someone another answer, but there's not much point in giving the SAME answer 7 hours later. If it were a few seconds or a few minutes later, I would excuse you for having tried to post at the same time. But, 7 hours?! Please read the existing answers next time, not just the original post.

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How To: Get encoding of a remote file
Java EE
URL url = new URL ("http://www.someSite.com/myCsvFile.csv"); // comma separated
InputStream is = url.openConnection().getInputStream();
InputStreamReader reader = new InputStreamReader(is);
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If I use local files it prints ISO8859_1 for one of the files.

All of that is because the HTTP server attaches a charset to every response. That's what you are seeing. The server may be using some logic to determine the actual encoding of the file it returns, or it may simply be using a hard-coded charset which may or may not be suitable for reading the file. The latter is unfortunately more likely.
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Regards
Den

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[email protected]

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How to mention encoding in servlet.

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